I hope to send a message from two slave to one master using nRF52 through bluetooth.
I send a message from a slave to a master with ble_app_uart_c and ble_app_uart. And I also connected two slave and one master with ble_app_multilink_central and peripheral. But I can't combine and apply that two case.
So please tell me how to send a message in multilink code, or how to use ble_app_uart as multilink.
I also found some information on internet, but I can't understand with them.
Yes, on_ble_evt() is the same as ble_evt_handler().
The steps above is based on SDK 12 or 13.
From SDK 14.0.0, ble_evt_dispatch() was replaced by NRF_SDH_BLE_OBSERVER().
On the newest status, I've got 1 Error in Keil:
error: #167: argument of type "ble_nus_c_t (*)[8]" is incompatible with parameter of type "ble_nus_c_t *"
The line is: ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
Thats my code:
/**
* Copyright (c) 2014 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @brief BLE LED Button Service central and client application main file.
*
* This example can be a central for up to 8 peripherals.
* The peripheral is called ble_app_blinky and can be found in the ble_peripheral
* folder.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "nordic_common.h"
#include "softdevice_handler.h"
#include "app_timer.h"
#include "boards.h"
#include "bsp.h"
#include "bsp_btn_ble.h"
#include "ble.h"
#include "ble_hci.h"
#include "app_uart.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_db_discovery.h"
#include "ble_lbs_c.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "app_uart.h"
#include "ble_nus_c.h"
#define NRF_LOG_MODULE_NAME "APP"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#define CENTRAL_LINK_COUNT 8 /**< Number of central links used by the application. When changing this number remember to adjust the RAM settings*/
#define PERIPHERAL_LINK_COUNT 0 /**< Number of peripheral links used by the application. When changing this number remember to adjust the RAM settings*/
#define TOTAL_LINK_COUNT CENTRAL_LINK_COUNT + PERIPHERAL_LINK_COUNT /**< Total number of links used by the application. */
#define CONN_CFG_TAG 1 /**< A tag that refers to the BLE stack configuration we set with @ref sd_ble_cfg_set. Default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */
#define CENTRAL_SCANNING_LED BSP_BOARD_LED_0
#define CENTRAL_CONNECTED_LED BSP_BOARD_LED_1
#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */
#define SCAN_INTERVAL 0x00A0 /**< Determines scan interval in units of 0.625 millisecond. */
#define SCAN_WINDOW 0x0050 /**< Determines scan window in units of 0.625 millisecond. */
#define SCAN_TIMEOUT 0x0000 /**< Timout when scanning. 0x0000 disables timeout. */
#define MIN_CONNECTION_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**< Determines minimum connection interval in milliseconds. */
#define MAX_CONNECTION_INTERVAL MSEC_TO_UNITS(30, UNIT_1_25_MS) /**< Determines maximum connection interval in milliseconds. */
#define SLAVE_LATENCY 0 /**< Determines slave latency in terms of connection events. */
#define SUPERVISION_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Determines supervision time-out in units of 10 milliseconds. */
#define UUID16_SIZE 2 /**< Size of 16 bit UUID */
#define UUID32_SIZE 4 /**< Size of 32 bit UUID */
#define UUID128_SIZE 16 /**< Size of 128 bit UUID */
#define ECHOBACK_BLE_UART_DATA 1 /**< Echo the UART data that is received over the Nordic UART Service back to the sender. */
#define LEDBUTTON_LED BSP_BOARD_LED_2 /**< LED to indicate a change of state of the the Button characteristic on the peer. */
#define LEDBUTTON_BUTTON_PIN BSP_BUTTON_0 /**< Button that will write to the LED characteristic of the peer. */
#define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50) /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */
static ble_nus_c_t m_ble_nus_c[TOTAL_LINK_COUNT]; /**< Instance of NUS service. Must be passed to all NUS_C API calls. */
static nrf_ble_gatt_t m_gatt; /**< GATT module instance. */
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
static char const m_target_periph_name[] = "Nordic_Blinky"; /**< Name of the device we try to connect to. This name is searched for in the scan report data*/
/** @brief Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_params =
{
.active = 0,
.interval = SCAN_INTERVAL,
.window = SCAN_WINDOW,
.timeout = SCAN_TIMEOUT,
#if (NRF_SD_BLE_API_VERSION <= 2)
.selective = 0,
.p_whitelist = NULL,
#endif
#if (NRF_SD_BLE_API_VERSION >= 3)
.use_whitelist = 0,
.adv_dir_report = 0,
#endif
};
/**@brief Connection parameters requested for connection. */
static ble_gap_conn_params_t const m_connection_param =
{
(uint16_t)MIN_CONNECTION_INTERVAL,
(uint16_t)MAX_CONNECTION_INTERVAL,
(uint16_t)SLAVE_LATENCY,
(uint16_t)SUPERVISION_TIMEOUT
};
static ble_lbs_c_t m_ble_lbs_c[TOTAL_LINK_COUNT]; /**< Main structures used by the LED Button client module. */
static uint8_t m_ble_lbs_c_count; /**< Keeps track of how many instances of LED Button client module have been initialized. >*/
static ble_db_discovery_t m_ble_db_discovery[TOTAL_LINK_COUNT]; /**< list of DB structures used by the database discovery module. */
static nrf_ble_gatt_t m_gatt; /**< GATT module instance. */
/**@brief Function to handle asserts in the SoftDevice.
*
* @details This function will be called in case of an assert in the SoftDevice.
*
* @warning This handler is an example only and does not fit a final product. You need to analyze
* how your product is supposed to react in case of Assert.
* @warning On assert from the SoftDevice, the system can only recover on reset.
*
* @param[in] line_num Line number of the failing ASSERT call.
* @param[in] p_file_name File name of the failing ASSERT call.
*/
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
app_error_handler(0xDEADBEEF, line_num, p_file_name);
}
/**@brief Function for the LEDs initialization.
*
* @details Initializes all LEDs used by the application.
*/
static void leds_init(void)
{
bsp_board_leds_init();
}
/**@brief NUS uuid. */
static ble_uuid_t const m_nus_uuid =
{
.uuid = BLE_UUID_NUS_SERVICE,
.type = NUS_SERVICE_UUID_TYPE
};
/**@brief Function to start scanning.
*/
static void scan_start(void)
{
ret_code_t ret;
(void) sd_ble_gap_scan_stop();
NRF_LOG_INFO("Start scanning for device name %s.\r\n", (uint32_t)m_target_periph_name);
ret = sd_ble_gap_scan_start(&m_scan_params);
APP_ERROR_CHECK(ret);
ret = bsp_indication_set(BSP_INDICATE_SCANNING);
APP_ERROR_CHECK(ret);
}
/**
* @brief Parses advertisement data, providing length and location of the field in case
* matching data is found.
*
* @param[in] type Type of data to be looked for in advertisement data.
* @param[in] p_advdata Advertisement report length and pointer to report.
* @param[out] p_typedata If data type requested is found in the data report, type data length and
* pointer to data will be populated here.
*
* @retval NRF_SUCCESS if the data type is found in the report.
* @retval NRF_ERROR_NOT_FOUND if the data type could not be found.
*/
static uint32_t adv_report_parse(uint8_t type, uint8_array_t * p_advdata, uint8_array_t * p_typedata)
{
uint32_t index = 0;
uint8_t * p_data;
p_data = p_advdata->p_data;
while (index < p_advdata->size)
{
uint8_t field_length = p_data[index];
uint8_t field_type = p_data[index + 1];
if (field_type == type)
{
p_typedata->p_data = &p_data[index + 2];
p_typedata->size = field_length - 1;
return NRF_SUCCESS;
}
index += field_length + 1;
}
return NRF_ERROR_NOT_FOUND;
}
/**@brief Function for handling app_uart events.
*
* @details This function will receive a single character from the app_uart module and append it to
* a string. The string will be be sent over BLE when the last character received was a
* 'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
*/
void uart_event_handle(app_uart_evt_t * p_event)
{
static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
static uint16_t index = 0;
uint32_t ret_val;
switch (p_event->evt_type)
{
/**@snippet [Handling data from UART] */
case APP_UART_DATA_READY:
UNUSED_VARIABLE(app_uart_get(&data_array[index]));
index++;
if ((data_array[index - 1] == '\n') || (index >= (m_ble_nus_max_data_len)))
{
NRF_LOG_DEBUG("Ready to send data over BLE NUS\r\n");
NRF_LOG_HEXDUMP_DEBUG(data_array, index);
do
{
ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
if ( (ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_BUSY) )
{
APP_ERROR_CHECK(ret_val);
}
} while (ret_val == NRF_ERROR_BUSY);
index = 0;
}
break;
/**@snippet [Handling data from UART] */
case APP_UART_COMMUNICATION_ERROR:
NRF_LOG_ERROR("Communication error occurred while handling UART.\r\n");
APP_ERROR_HANDLER(p_event->data.error_communication);
break;
case APP_UART_FIFO_ERROR:
NRF_LOG_ERROR("Error occurred in FIFO module used by UART.\r\n");
APP_ERROR_HANDLER(p_event->data.error_code);
break;
default:
break;
}
}
/**@snippet [Handling events from the ble_nus_c module] */
static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, const ble_nus_c_evt_t * p_ble_nus_evt)
{
ret_code_t err_code;
switch (p_ble_nus_evt->evt_type)
{
case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:
NRF_LOG_INFO("Discovery complete.\r\n");
err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
APP_ERROR_CHECK(err_code);
err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
APP_ERROR_CHECK(err_code);
printf("Connected to device with Nordic UART Service.\r\n");
break;
case BLE_NUS_C_EVT_NUS_TX_EVT:
ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
break;
case BLE_NUS_C_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected.\r\n");
scan_start();
break;
}
}
/**@brief Handles events coming from the LED Button central module.
*
* @param[in] p_lbs_c The instance of LBS_C that triggered the event.
* @param[in] p_lbs_c_evt The LBS_C event.
*/
static void lbs_c_evt_handler(ble_lbs_c_t * p_lbs_c, ble_lbs_c_evt_t * p_lbs_c_evt)
{
switch (p_lbs_c_evt->evt_type)
{
case BLE_LBS_C_EVT_DISCOVERY_COMPLETE:
{
ret_code_t err_code;
NRF_LOG_INFO("LED Button service discovered on conn_handle 0x%x\r\n",
p_lbs_c_evt->conn_handle);
err_code = app_button_enable();
APP_ERROR_CHECK(err_code);
// LED Button service discovered. Enable notification of Button.
err_code = ble_lbs_c_button_notif_enable(p_lbs_c);
APP_ERROR_CHECK(err_code);
} break; // BLE_LBS_C_EVT_DISCOVERY_COMPLETE
case BLE_LBS_C_EVT_BUTTON_NOTIFICATION:
{
NRF_LOG_INFO("Link 0x%x, Button state changed on peer to 0x%x\r\n",
p_lbs_c_evt->conn_handle,
p_lbs_c_evt->params.button.button_state);
if (p_lbs_c_evt->params.button.button_state)
{
bsp_board_led_on(LEDBUTTON_LED);
}
else
{
bsp_board_led_off(LEDBUTTON_LED);
}
} break; // BLE_LBS_C_EVT_BUTTON_NOTIFICATION
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling the advertising report BLE event.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_adv_report(ble_evt_t const * p_ble_evt)
{
uint32_t err_code;
uint8_array_t adv_data;
uint8_array_t dev_name;
bool do_connect = false;
// For readibility.
ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
ble_gap_addr_t const * peer_addr = &p_gap_evt->params.adv_report.peer_addr;
// Prepare advertisement report for parsing.
adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data;
adv_data.size = p_gap_evt->params.adv_report.dlen;
// Search for advertising names.
bool found_name = false;
err_code = adv_report_parse(BLE_GAP_AD_TYPE_COMPLETE_LOCAL_NAME,
&adv_data,
&dev_name);
if (err_code != NRF_SUCCESS)
{
// Look for the short local name if it was not found as complete.
err_code = adv_report_parse(BLE_GAP_AD_TYPE_SHORT_LOCAL_NAME, &adv_data, &dev_name);
if (err_code != NRF_SUCCESS)
{
// If we can't parse the data, then exit.
return;
}
else
{
found_name = true;
}
}
else
{
found_name = true;
}
if (found_name)
{
if (strlen(m_target_periph_name) != 0)
{
if (memcmp(m_target_periph_name, dev_name.p_data, dev_name.size) == 0)
{
do_connect = true;
}
}
}
if (do_connect)
{
// Initiate connection.
err_code = sd_ble_gap_connect(peer_addr,
&m_scan_params, &m_connection_param,
CONN_CFG_TAG);
if (err_code != NRF_SUCCESS)
{
NRF_LOG_ERROR("Connection Request Failed, reason %d\r\n", err_code);
}
}
}
static bool is_uuid_present(ble_uuid_t const * p_target_uuid,
ble_gap_evt_adv_report_t const * p_adv_report)
{
ret_code_t err_code;
ble_uuid_t extracted_uuid;
uint16_t index = 0;
uint8_t * p_data = (uint8_t *)p_adv_report->data;
while (index < p_adv_report->dlen)
{
uint8_t field_length = p_data[index];
uint8_t field_type = p_data[index + 1];
if ( (field_type == BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE)
|| (field_type == BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE))
{
for (uint32_t i = 0; i < (field_length / UUID16_SIZE); i++)
{
err_code = sd_ble_uuid_decode(UUID16_SIZE,
&p_data[i * UUID16_SIZE + index + 2],
&extracted_uuid);
if (err_code == NRF_SUCCESS)
{
if ((extracted_uuid.uuid == p_target_uuid->uuid)
&& (extracted_uuid.type == p_target_uuid->type))
{
return true;
}
}
}
}
else if ( (field_type == BLE_GAP_AD_TYPE_32BIT_SERVICE_UUID_MORE_AVAILABLE)
|| (field_type == BLE_GAP_AD_TYPE_32BIT_SERVICE_UUID_COMPLETE))
{
for (uint32_t i = 0; i < (field_length / UUID32_SIZE); i++)
{
err_code = sd_ble_uuid_decode(UUID32_SIZE,
&p_data[i * UUID32_SIZE + index + 2],
&extracted_uuid);
if (err_code == NRF_SUCCESS)
{
if ( (extracted_uuid.uuid == p_target_uuid->uuid)
&& (extracted_uuid.type == p_target_uuid->type))
{
return true;
}
}
}
}
else if ( (field_type == BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_MORE_AVAILABLE)
|| (field_type == BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_COMPLETE))
{
err_code = sd_ble_uuid_decode(UUID128_SIZE, &p_data[index + 2], &extracted_uuid);
if (err_code == NRF_SUCCESS)
{
if ( (extracted_uuid.uuid == p_target_uuid->uuid)
&& (extracted_uuid.type == p_target_uuid->type))
{
return true;
}
}
}
index += field_length + 1;
}
return false;
}
/**@brief Function for handling BLE Stack events concerning central applications.
*
* @details This function keeps the connection handles of central applications up-to-date. It
* parses scanning reports, initiating a connection attempt to peripherals when a
* target UUID is found, and manages connection parameter update requests. Additionally,
* it updates the status of LEDs used to report central applications activity.
*
* @note Since this function updates connection handles, @ref BLE_GAP_EVT_DISCONNECTED events
* should be dispatched to the target application before invoking this function.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_evt(ble_evt_t const * p_ble_evt)
{
ret_code_t err_code;
// For readability.
ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
switch (p_ble_evt->header.evt_id)
{
// Upon connection, check which peripheral has connected, initiate DB
// discovery, update LEDs status and resume scanning if necessary.
case BLE_GAP_EVT_CONNECTED:
{
NRF_LOG_INFO("Connected to target\r\n");
err_code = ble_nus_c_handles_assign(m_ble_nus_c, p_ble_evt->evt.gap_evt.conn_handle, NULL);
APP_ERROR_CHECK(err_code);
err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
APP_ERROR_CHECK(err_code);
// start discovery of services. The NUS Client waits for a discovery result
err_code = ble_db_discovery_start(m_ble_db_discovery, p_ble_evt->evt.gap_evt.conn_handle);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Connection 0x%x established, starting DB discovery.\r\n",
p_gap_evt->conn_handle);
APP_ERROR_CHECK_BOOL(p_gap_evt->conn_handle < TOTAL_LINK_COUNT);
err_code = ble_lbs_c_handles_assign(&m_ble_lbs_c[p_gap_evt->conn_handle],
p_gap_evt->conn_handle,
NULL);
APP_ERROR_CHECK(err_code);
memset(&m_ble_db_discovery[p_gap_evt->conn_handle], 0x00, sizeof(ble_db_discovery_t));
err_code = ble_db_discovery_start(&m_ble_db_discovery[p_gap_evt->conn_handle],
p_gap_evt->conn_handle);
if (err_code != NRF_ERROR_BUSY)
{
APP_ERROR_CHECK(err_code);
}
// Update LEDs status, and check if we should be looking for more
// peripherals to connect to.
bsp_board_led_on(CENTRAL_CONNECTED_LED);
if (ble_conn_state_n_centrals() == CENTRAL_LINK_COUNT)
{
bsp_board_led_off(CENTRAL_SCANNING_LED);
}
else
{
// Resume scanning.
bsp_board_led_on(CENTRAL_SCANNING_LED);
scan_start();
}
} break; // BLE_GAP_EVT_CONNECTED
// Upon disconnection, reset the connection handle of the peer which disconnected, update
// the LEDs status and start scanning again.
case BLE_GAP_EVT_DISCONNECTED:
{
NRF_LOG_INFO("LBS central link 0x%x disconnected (reason: 0x%x)\r\n",
p_gap_evt->conn_handle,
p_gap_evt->params.disconnected.reason);
if (ble_conn_state_n_centrals() == 0)
{
err_code = app_button_disable();
APP_ERROR_CHECK(err_code);
// Turn off connection indication LED
bsp_board_led_off(CENTRAL_CONNECTED_LED);
}
// Start scanning
scan_start();
// Turn on LED for indicating scanning
bsp_board_led_on(CENTRAL_SCANNING_LED);
} break;
case BLE_GAP_EVT_ADV_REPORT:
on_adv_report(p_ble_evt);
const ble_gap_evt_adv_report_t * p_adv_report = &p_gap_evt->params.adv_report;
if (is_uuid_present(&m_nus_uuid, p_adv_report))
{
err_code = sd_ble_gap_connect(&p_adv_report->peer_addr,
&m_scan_params,
&m_connection_param,
CONN_CFG_TAG);
if (err_code == NRF_SUCCESS)
{
// scan is automatically stopped by the connect
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x\r\n",
p_adv_report->peer_addr.addr[0],
p_adv_report->peer_addr.addr[1],
p_adv_report->peer_addr.addr[2],
p_adv_report->peer_addr.addr[3],
p_adv_report->peer_addr.addr[4],
p_adv_report->peer_addr.addr[5]
);
}
}
break;
case BLE_GAP_EVT_TIMEOUT:
{
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_SCAN)
{
NRF_LOG_INFO("Scan timed out.\r\n");
scan_start();
}
else if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
NRF_LOG_INFO("Connection Request timed out.\r\n");
}
} break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
{
NRF_LOG_DEBUG("BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST.\r\n");
// Accept parameters requested by peer.
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
// Pairing not supported
err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
APP_ERROR_CHECK(err_code);
break; // BLE_GAP_EVT_SEC_PARAMS_REQUEST
case BLE_GATTC_EVT_TIMEOUT:
{
// Disconnect on GATT Client timeout event.
NRF_LOG_DEBUG("GATT Client Timeout.\r\n");
err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GATTS_EVT_TIMEOUT:
{
// Disconnect on GATT Server timeout event.
NRF_LOG_DEBUG("GATT Server Timeout.\r\n");
err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);
} break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for dispatching a BLE stack event to all modules with a BLE stack event handler.
*
* @details This function is called from the scheduler in the main loop after a BLE stack event has
* been received.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
uint16_t conn_handle;
conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
ble_conn_state_on_ble_evt(p_ble_evt);
on_ble_evt(p_ble_evt);
// Make sure taht an invalid connection handle are not passed since
// our array of modules is bound to TOTAL_LINK_COUNT.
if (conn_handle < TOTAL_LINK_COUNT)
{
ble_db_discovery_on_ble_evt(&m_ble_db_discovery[conn_handle], p_ble_evt);
ble_lbs_c_on_ble_evt(&m_ble_lbs_c[conn_handle], p_ble_evt);
}
nrf_ble_gatt_on_ble_evt(&m_gatt, p_ble_evt);
ble_nus_c_on_ble_evt(m_ble_nus_c,p_ble_evt);
}
/**@brief LED Button collector initialization.
*/
static void lbs_c_init(void)
{
ret_code_t err_code;
ble_lbs_c_init_t lbs_c_init_obj;
lbs_c_init_obj.evt_handler = lbs_c_evt_handler;
for (m_ble_lbs_c_count = 0; m_ble_lbs_c_count < TOTAL_LINK_COUNT; m_ble_lbs_c_count++)
{
err_code = ble_lbs_c_init(&m_ble_lbs_c[m_ble_lbs_c_count], &lbs_c_init_obj);
APP_ERROR_CHECK(err_code);
}
m_ble_lbs_c_count = 0;
}
/**@brief Function for initializing the BLE stack.
*
* @details Initializes the SoftDevice and the BLE event interrupts.
*/
static void ble_stack_init(void)
{
ret_code_t err_code;
nrf_clock_lf_cfg_t clock_lf_cfg = NRF_CLOCK_LFCLKSRC;
// Initialize the SoftDevice handler module.
SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL);
// Fetch the start address of the application RAM.
uint32_t ram_start = 0;
err_code = softdevice_app_ram_start_get(&ram_start);
APP_ERROR_CHECK(err_code);
// Overwrite some of the default configurations for the BLE stack.
ble_cfg_t ble_cfg;
// Configure the maximum number of connections.
memset(&ble_cfg, 0, sizeof(ble_cfg));
ble_cfg.gap_cfg.role_count_cfg.periph_role_count = PERIPHERAL_LINK_COUNT;
ble_cfg.gap_cfg.role_count_cfg.central_role_count = CENTRAL_LINK_COUNT;
ble_cfg.gap_cfg.role_count_cfg.central_sec_count = 1;
err_code = sd_ble_cfg_set(BLE_GAP_CFG_ROLE_COUNT, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code);
memset(&ble_cfg, 0, sizeof(ble_cfg));
ble_cfg.conn_cfg.params.gap_conn_cfg.conn_count = PERIPHERAL_LINK_COUNT + CENTRAL_LINK_COUNT;
ble_cfg.conn_cfg.params.gap_conn_cfg.event_length = BLE_GAP_EVENT_LENGTH_DEFAULT;
ble_cfg.conn_cfg.conn_cfg_tag = CONN_CFG_TAG;
err_code = sd_ble_cfg_set(BLE_CONN_CFG_GAP, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code);
// Enable BLE stack.
err_code = softdevice_enable(&ram_start);
APP_ERROR_CHECK(err_code);
// Register with the SoftDevice handler module for BLE events.
err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for writing to the LED characteristic of all connected clients.
*
* @details Based on if the button is pressed or released, this function writes a high or low
* LED status to the server.
*
* @param[in] button_action The button action (press/release).
* Determines if the LEDs of the servers will be ON or OFF.
*
* @return If successful NRF_SUCCESS is returned. Otherwise, the error code from @ref ble_lbs_led_status_send.
*/
static ret_code_t led_status_send_to_all(uint8_t button_action)
{
ret_code_t err_code;
for (uint32_t i = 0; i < CENTRAL_LINK_COUNT; i++)
{
err_code = ble_lbs_led_status_send(&m_ble_lbs_c[i], button_action);
if (err_code != NRF_SUCCESS &&
err_code != BLE_ERROR_INVALID_CONN_HANDLE &&
err_code != NRF_ERROR_INVALID_STATE)
{
return err_code;
}
}
return NRF_SUCCESS;
}
/**@brief Function for handling events from the button handler module.
*
* @param[in] pin_no The pin that the event applies to.
* @param[in] button_action The button action (press/release).
*/
static void button_event_handler(uint8_t pin_no, uint8_t button_action)
{
ret_code_t err_code;
switch (pin_no)
{
case LEDBUTTON_BUTTON_PIN:
err_code = led_status_send_to_all(button_action);
if (err_code == NRF_SUCCESS)
{
NRF_LOG_INFO("LBS write LED state %d\r\n", button_action);
}
break;
default:
APP_ERROR_HANDLER(pin_no);
break;
}
}
/**@brief Function for initializing the button handler module.
*/
static void buttons_init(void)
{
ret_code_t err_code;
//The array must be static because a pointer to it will be saved in the button handler module.
static app_button_cfg_t buttons[] =
{
{LEDBUTTON_BUTTON_PIN, false, BUTTON_PULL, button_event_handler}
};
err_code = app_button_init(buttons, sizeof(buttons) / sizeof(buttons[0]),
BUTTON_DETECTION_DELAY);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling database discovery events.
*
* @details This function is callback function to handle events from the database discovery module.
* Depending on the UUIDs that are discovered, this function should forward the events
* to their respective services.
*
* @param[in] p_event Pointer to the database discovery event.
*/
static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
{
NRF_LOG_DEBUG("call to ble_lbs_on_db_disc_evt for instance %d and link 0x%x!\r\n",
p_evt->conn_handle,
p_evt->conn_handle);
ble_lbs_on_db_disc_evt(&m_ble_lbs_c[p_evt->conn_handle], p_evt);
}
/** @brief Database discovery initialization.
*/
static void db_discovery_init(void)
{
ret_code_t err_code = ble_db_discovery_init(db_disc_handler);
APP_ERROR_CHECK(err_code);
}
/** @brief Function to sleep until a BLE event is received by the application.
*/
static void power_manage(void)
{
ret_code_t err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);
}
/** @brief Function for initializing the log module.
*/
static void log_init(void)
{
ret_code_t err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
}
/** @brief Function for initializing the timer.
*/
static void timer_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the GATT module.
*/
static void gatt_init(void)
{
ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the NUS Client. */
static void nus_c_init(void)
{
ret_code_t err_code;
ble_nus_c_init_t init;
init.evt_handler = ble_nus_c_evt_handler;
for (m_ble_lbs_c_count = 0; m_ble_lbs_c_count < TOTAL_LINK_COUNT; m_ble_lbs_c_count++)
{
err_code = ble_nus_c_init(&m_ble_nus_c[m_ble_lbs_c_count], &init);
APP_ERROR_CHECK(err_code);
}
m_ble_lbs_c_count = 0;
}
/**@brief Function for initializing the UART. */
static void uart_init(void)
{
ret_code_t err_code;
const app_uart_comm_params_t comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
.rts_pin_no = RTS_PIN_NUMBER,
.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
.baud_rate = UART_BAUDRATE_BAUDRATE_Baud115200
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_event_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
}
int main(void)
{
log_init();
uart_init();
timer_init();
leds_init();
buttons_init();
ble_stack_init();
gatt_init();
db_discovery_init();
//lbs_c_init();
ble_conn_state_init();
nus_c_init();
NRF_LOG_INFO("Multilink example started.\r\n");
// Start scanning for peripherals and initiate connection to devices which
// advertise.
scan_start();
// Turn on the LED to signal scanning.
bsp_board_led_on(CENTRAL_SCANNING_LED);
for (;;)
{
if (NRF_LOG_PROCESS() == false)
{
// Wait for BLE events.
power_manage();
}
}
}
I don't understand this error 100%, is it because it can't match the pointers?
Thanks for your help :)
On the newest status, I've got 1 Error in Keil:
error: #167: argument of type "ble_nus_c_t (*)[8]" is incompatible with parameter of type "ble_nus_c_t *"
The line is: ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
Thats my code:
/**
* Copyright (c) 2014 - 2017, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @brief BLE LED Button Service central and client application main file.
*
* This example can be a central for up to 8 peripherals.
* The peripheral is called ble_app_blinky and can be found in the ble_peripheral
* folder.
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "nordic_common.h"
#include "softdevice_handler.h"
#include "app_timer.h"
#include "boards.h"
#include "bsp.h"
#include "bsp_btn_ble.h"
#include "ble.h"
#include "ble_hci.h"
#include "app_uart.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "ble_db_discovery.h"
#include "ble_lbs_c.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "app_uart.h"
#include "ble_nus_c.h"
#define NRF_LOG_MODULE_NAME "APP"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#define CENTRAL_LINK_COUNT 8 /**< Number of central links used by the application. When changing this number remember to adjust the RAM settings*/
#define PERIPHERAL_LINK_COUNT 0 /**< Number of peripheral links used by the application. When changing this number remember to adjust the RAM settings*/
#define TOTAL_LINK_COUNT CENTRAL_LINK_COUNT + PERIPHERAL_LINK_COUNT /**< Total number of links used by the application. */
#define CONN_CFG_TAG 1 /**< A tag that refers to the BLE stack configuration we set with @ref sd_ble_cfg_set. Default tag is @ref BLE_CONN_CFG_TAG_DEFAULT. */
#define CENTRAL_SCANNING_LED BSP_BOARD_LED_0
#define CENTRAL_CONNECTED_LED BSP_BOARD_LED_1
#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */
#define SCAN_INTERVAL 0x00A0 /**< Determines scan interval in units of 0.625 millisecond. */
#define SCAN_WINDOW 0x0050 /**< Determines scan window in units of 0.625 millisecond. */
#define SCAN_TIMEOUT 0x0000 /**< Timout when scanning. 0x0000 disables timeout. */
#define MIN_CONNECTION_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**< Determines minimum connection interval in milliseconds. */
#define MAX_CONNECTION_INTERVAL MSEC_TO_UNITS(30, UNIT_1_25_MS) /**< Determines maximum connection interval in milliseconds. */
#define SLAVE_LATENCY 0 /**< Determines slave latency in terms of connection events. */
#define SUPERVISION_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Determines supervision time-out in units of 10 milliseconds. */
#define UUID16_SIZE 2 /**< Size of 16 bit UUID */
#define UUID32_SIZE 4 /**< Size of 32 bit UUID */
#define UUID128_SIZE 16 /**< Size of 128 bit UUID */
#define ECHOBACK_BLE_UART_DATA 1 /**< Echo the UART data that is received over the Nordic UART Service back to the sender. */
#define LEDBUTTON_LED BSP_BOARD_LED_2 /**< LED to indicate a change of state of the the Button characteristic on the peer. */
#define LEDBUTTON_BUTTON_PIN BSP_BUTTON_0 /**< Button that will write to the LED characteristic of the peer. */
#define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50) /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */
static ble_nus_c_t m_ble_nus_c[TOTAL_LINK_COUNT]; /**< Instance of NUS service. Must be passed to all NUS_C API calls. */
static nrf_ble_gatt_t m_gatt; /**< GATT module instance. */
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - OPCODE_LENGTH - HANDLE_LENGTH; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
static char const m_target_periph_name[] = "Nordic_Blinky"; /**< Name of the device we try to connect to. This name is searched for in the scan report data*/
/** @brief Scan parameters requested for scanning and connection. */
static ble_gap_scan_params_t const m_scan_params =
{
.active = 0,
.interval = SCAN_INTERVAL,
.window = SCAN_WINDOW,
.timeout = SCAN_TIMEOUT,
#if (NRF_SD_BLE_API_VERSION <= 2)
.selective = 0,
.p_whitelist = NULL,
#endif
#if (NRF_SD_BLE_API_VERSION >= 3)
.use_whitelist = 0,
.adv_dir_report = 0,
#endif
};
/**@brief Connection parameters requested for connection. */
static ble_gap_conn_params_t const m_connection_param =
{
(uint16_t)MIN_CONNECTION_INTERVAL,
(uint16_t)MAX_CONNECTION_INTERVAL,
(uint16_t)SLAVE_LATENCY,
(uint16_t)SUPERVISION_TIMEOUT
};
static ble_lbs_c_t m_ble_lbs_c[TOTAL_LINK_COUNT]; /**< Main structures used by the LED Button client module. */
static uint8_t m_ble_lbs_c_count; /**< Keeps track of how many instances of LED Button client module have been initialized. >*/
static ble_db_discovery_t m_ble_db_discovery[TOTAL_LINK_COUNT]; /**< list of DB structures used by the database discovery module. */
static nrf_ble_gatt_t m_gatt; /**< GATT module instance. */
/**@brief Function to handle asserts in the SoftDevice.
*
* @details This function will be called in case of an assert in the SoftDevice.
*
* @warning This handler is an example only and does not fit a final product. You need to analyze
* how your product is supposed to react in case of Assert.
* @warning On assert from the SoftDevice, the system can only recover on reset.
*
* @param[in] line_num Line number of the failing ASSERT call.
* @param[in] p_file_name File name of the failing ASSERT call.
*/
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
app_error_handler(0xDEADBEEF, line_num, p_file_name);
}
/**@brief Function for the LEDs initialization.
*
* @details Initializes all LEDs used by the application.
*/
static void leds_init(void)
{
bsp_board_leds_init();
}
/**@brief NUS uuid. */
static ble_uuid_t const m_nus_uuid =
{
.uuid = BLE_UUID_NUS_SERVICE,
.type = NUS_SERVICE_UUID_TYPE
};
/**@brief Function to start scanning.
*/
static void scan_start(void)
{
ret_code_t ret;
(void) sd_ble_gap_scan_stop();
NRF_LOG_INFO("Start scanning for device name %s.\r\n", (uint32_t)m_target_periph_name);
ret = sd_ble_gap_scan_start(&m_scan_params);
APP_ERROR_CHECK(ret);
ret = bsp_indication_set(BSP_INDICATE_SCANNING);
APP_ERROR_CHECK(ret);
}
/**
* @brief Parses advertisement data, providing length and location of the field in case
* matching data is found.
*
* @param[in] type Type of data to be looked for in advertisement data.
* @param[in] p_advdata Advertisement report length and pointer to report.
* @param[out] p_typedata If data type requested is found in the data report, type data length and
* pointer to data will be populated here.
*
* @retval NRF_SUCCESS if the data type is found in the report.
* @retval NRF_ERROR_NOT_FOUND if the data type could not be found.
*/
static uint32_t adv_report_parse(uint8_t type, uint8_array_t * p_advdata, uint8_array_t * p_typedata)
{
uint32_t index = 0;
uint8_t * p_data;
p_data = p_advdata->p_data;
while (index < p_advdata->size)
{
uint8_t field_length = p_data[index];
uint8_t field_type = p_data[index + 1];
if (field_type == type)
{
p_typedata->p_data = &p_data[index + 2];
p_typedata->size = field_length - 1;
return NRF_SUCCESS;
}
index += field_length + 1;
}
return NRF_ERROR_NOT_FOUND;
}
/**@brief Function for handling app_uart events.
*
* @details This function will receive a single character from the app_uart module and append it to
* a string. The string will be be sent over BLE when the last character received was a
* 'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
*/
void uart_event_handle(app_uart_evt_t * p_event)
{
static uint8_t data_array[BLE_NUS_MAX_DATA_LEN];
static uint16_t index = 0;
uint32_t ret_val;
switch (p_event->evt_type)
{
/**@snippet [Handling data from UART] */
case APP_UART_DATA_READY:
UNUSED_VARIABLE(app_uart_get(&data_array[index]));
index++;
if ((data_array[index - 1] == '\n') || (index >= (m_ble_nus_max_data_len)))
{
NRF_LOG_DEBUG("Ready to send data over BLE NUS\r\n");
NRF_LOG_HEXDUMP_DEBUG(data_array, index);
do
{
ret_val = ble_nus_c_string_send(&m_ble_nus_c, data_array, index);
if ( (ret_val != NRF_ERROR_INVALID_STATE) && (ret_val != NRF_ERROR_BUSY) )
{
APP_ERROR_CHECK(ret_val);
}
} while (ret_val == NRF_ERROR_BUSY);
index = 0;
}
break;
/**@snippet [Handling data from UART] */
case APP_UART_COMMUNICATION_ERROR:
NRF_LOG_ERROR("Communication error occurred while handling UART.\r\n");
APP_ERROR_HANDLER(p_event->data.error_communication);
break;
case APP_UART_FIFO_ERROR:
NRF_LOG_ERROR("Error occurred in FIFO module used by UART.\r\n");
APP_ERROR_HANDLER(p_event->data.error_code);
break;
default:
break;
}
}
/**@snippet [Handling events from the ble_nus_c module] */
static void ble_nus_c_evt_handler(ble_nus_c_t * p_ble_nus_c, const ble_nus_c_evt_t * p_ble_nus_evt)
{
ret_code_t err_code;
switch (p_ble_nus_evt->evt_type)
{
case BLE_NUS_C_EVT_DISCOVERY_COMPLETE:
NRF_LOG_INFO("Discovery complete.\r\n");
err_code = ble_nus_c_handles_assign(p_ble_nus_c, p_ble_nus_evt->conn_handle, &p_ble_nus_evt->handles);
APP_ERROR_CHECK(err_code);
err_code = ble_nus_c_tx_notif_enable(p_ble_nus_c);
APP_ERROR_CHECK(err_code);
printf("Connected to device with Nordic UART Service.\r\n");
break;
case BLE_NUS_C_EVT_NUS_TX_EVT:
ble_nus_chars_received_uart_print(p_ble_nus_evt->p_data, p_ble_nus_evt->data_len);
break;
case BLE_NUS_C_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected.\r\n");
scan_start();
break;
}
}
/**@brief Handles events coming from the LED Button central module.
*
* @param[in] p_lbs_c The instance of LBS_C that triggered the event.
* @param[in] p_lbs_c_evt The LBS_C event.
*/
static void lbs_c_evt_handler(ble_lbs_c_t * p_lbs_c, ble_lbs_c_evt_t * p_lbs_c_evt)
{
switch (p_lbs_c_evt->evt_type)
{
case BLE_LBS_C_EVT_DISCOVERY_COMPLETE:
{
ret_code_t err_code;
NRF_LOG_INFO("LED Button service discovered on conn_handle 0x%x\r\n",
p_lbs_c_evt->conn_handle);
err_code = app_button_enable();
APP_ERROR_CHECK(err_code);
// LED Button service discovered. Enable notification of Button.
err_code = ble_lbs_c_button_notif_enable(p_lbs_c);
APP_ERROR_CHECK(err_code);
} break; // BLE_LBS_C_EVT_DISCOVERY_COMPLETE
case BLE_LBS_C_EVT_BUTTON_NOTIFICATION:
{
NRF_LOG_INFO("Link 0x%x, Button state changed on peer to 0x%x\r\n",
p_lbs_c_evt->conn_handle,
p_lbs_c_evt->params.button.button_state);
if (p_lbs_c_evt->params.button.button_state)
{
bsp_board_led_on(LEDBUTTON_LED);
}
else
{
bsp_board_led_off(LEDBUTTON_LED);
}
} break; // BLE_LBS_C_EVT_BUTTON_NOTIFICATION
default:
// No implementation needed.
break;
}
}
/**@brief Function for handling the advertising report BLE event.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_adv_report(ble_evt_t const * p_ble_evt)
{
uint32_t err_code;
uint8_array_t adv_data;
uint8_array_t dev_name;
bool do_connect = false;
// For readibility.
ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
ble_gap_addr_t const * peer_addr = &p_gap_evt->params.adv_report.peer_addr;
// Prepare advertisement report for parsing.
adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data;
adv_data.size = p_gap_evt->params.adv_report.dlen;
// Search for advertising names.
bool found_name = false;
err_code = adv_report_parse(BLE_GAP_AD_TYPE_COMPLETE_LOCAL_NAME,
&adv_data,
&dev_name);
if (err_code != NRF_SUCCESS)
{
// Look for the short local name if it was not found as complete.
err_code = adv_report_parse(BLE_GAP_AD_TYPE_SHORT_LOCAL_NAME, &adv_data, &dev_name);
if (err_code != NRF_SUCCESS)
{
// If we can't parse the data, then exit.
return;
}
else
{
found_name = true;
}
}
else
{
found_name = true;
}
if (found_name)
{
if (strlen(m_target_periph_name) != 0)
{
if (memcmp(m_target_periph_name, dev_name.p_data, dev_name.size) == 0)
{
do_connect = true;
}
}
}
if (do_connect)
{
// Initiate connection.
err_code = sd_ble_gap_connect(peer_addr,
&m_scan_params, &m_connection_param,
CONN_CFG_TAG);
if (err_code != NRF_SUCCESS)
{
NRF_LOG_ERROR("Connection Request Failed, reason %d\r\n", err_code);
}
}
}
static bool is_uuid_present(ble_uuid_t const * p_target_uuid,
ble_gap_evt_adv_report_t const * p_adv_report)
{
ret_code_t err_code;
ble_uuid_t extracted_uuid;
uint16_t index = 0;
uint8_t * p_data = (uint8_t *)p_adv_report->data;
while (index < p_adv_report->dlen)
{
uint8_t field_length = p_data[index];
uint8_t field_type = p_data[index + 1];
if ( (field_type == BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE)
|| (field_type == BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE))
{
for (uint32_t i = 0; i < (field_length / UUID16_SIZE); i++)
{
err_code = sd_ble_uuid_decode(UUID16_SIZE,
&p_data[i * UUID16_SIZE + index + 2],
&extracted_uuid);
if (err_code == NRF_SUCCESS)
{
if ((extracted_uuid.uuid == p_target_uuid->uuid)
&& (extracted_uuid.type == p_target_uuid->type))
{
return true;
}
}
}
}
else if ( (field_type == BLE_GAP_AD_TYPE_32BIT_SERVICE_UUID_MORE_AVAILABLE)
|| (field_type == BLE_GAP_AD_TYPE_32BIT_SERVICE_UUID_COMPLETE))
{
for (uint32_t i = 0; i < (field_length / UUID32_SIZE); i++)
{
err_code = sd_ble_uuid_decode(UUID32_SIZE,
&p_data[i * UUID32_SIZE + index + 2],
&extracted_uuid);
if (err_code == NRF_SUCCESS)
{
if ( (extracted_uuid.uuid == p_target_uuid->uuid)
&& (extracted_uuid.type == p_target_uuid->type))
{
return true;
}
}
}
}
else if ( (field_type == BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_MORE_AVAILABLE)
|| (field_type == BLE_GAP_AD_TYPE_128BIT_SERVICE_UUID_COMPLETE))
{
err_code = sd_ble_uuid_decode(UUID128_SIZE, &p_data[index + 2], &extracted_uuid);
if (err_code == NRF_SUCCESS)
{
if ( (extracted_uuid.uuid == p_target_uuid->uuid)
&& (extracted_uuid.type == p_target_uuid->type))
{
return true;
}
}
}
index += field_length + 1;
}
return false;
}
/**@brief Function for handling BLE Stack events concerning central applications.
*
* @details This function keeps the connection handles of central applications up-to-date. It
* parses scanning reports, initiating a connection attempt to peripherals when a
* target UUID is found, and manages connection parameter update requests. Additionally,
* it updates the status of LEDs used to report central applications activity.
*
* @note Since this function updates connection handles, @ref BLE_GAP_EVT_DISCONNECTED events
* should be dispatched to the target application before invoking this function.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_evt(ble_evt_t const * p_ble_evt)
{
ret_code_t err_code;
// For readability.
ble_gap_evt_t const * p_gap_evt = &p_ble_evt->evt.gap_evt;
switch (p_ble_evt->header.evt_id)
{
// Upon connection, check which peripheral has connected, initiate DB
// discovery, update LEDs status and resume scanning if necessary.
case BLE_GAP_EVT_CONNECTED:
{
NRF_LOG_INFO("Connected to target\r\n");
err_code = ble_nus_c_handles_assign(m_ble_nus_c, p_ble_evt->evt.gap_evt.conn_handle, NULL);
APP_ERROR_CHECK(err_code);
err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
APP_ERROR_CHECK(err_code);
// start discovery of services. The NUS Client waits for a discovery result
err_code = ble_db_discovery_start(m_ble_db_discovery, p_ble_evt->evt.gap_evt.conn_handle);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Connection 0x%x established, starting DB discovery.\r\n",
p_gap_evt->conn_handle);
APP_ERROR_CHECK_BOOL(p_gap_evt->conn_handle < TOTAL_LINK_COUNT);
err_code = ble_lbs_c_handles_assign(&m_ble_lbs_c[p_gap_evt->conn_handle],
p_gap_evt->conn_handle,
NULL);
APP_ERROR_CHECK(err_code);
memset(&m_ble_db_discovery[p_gap_evt->conn_handle], 0x00, sizeof(ble_db_discovery_t));
err_code = ble_db_discovery_start(&m_ble_db_discovery[p_gap_evt->conn_handle],
p_gap_evt->conn_handle);
if (err_code != NRF_ERROR_BUSY)
{
APP_ERROR_CHECK(err_code);
}
// Update LEDs status, and check if we should be looking for more
// peripherals to connect to.
bsp_board_led_on(CENTRAL_CONNECTED_LED);
if (ble_conn_state_n_centrals() == CENTRAL_LINK_COUNT)
{
bsp_board_led_off(CENTRAL_SCANNING_LED);
}
else
{
// Resume scanning.
bsp_board_led_on(CENTRAL_SCANNING_LED);
scan_start();
}
} break; // BLE_GAP_EVT_CONNECTED
// Upon disconnection, reset the connection handle of the peer which disconnected, update
// the LEDs status and start scanning again.
case BLE_GAP_EVT_DISCONNECTED:
{
NRF_LOG_INFO("LBS central link 0x%x disconnected (reason: 0x%x)\r\n",
p_gap_evt->conn_handle,
p_gap_evt->params.disconnected.reason);
if (ble_conn_state_n_centrals() == 0)
{
err_code = app_button_disable();
APP_ERROR_CHECK(err_code);
// Turn off connection indication LED
bsp_board_led_off(CENTRAL_CONNECTED_LED);
}
// Start scanning
scan_start();
// Turn on LED for indicating scanning
bsp_board_led_on(CENTRAL_SCANNING_LED);
} break;
case BLE_GAP_EVT_ADV_REPORT:
on_adv_report(p_ble_evt);
const ble_gap_evt_adv_report_t * p_adv_report = &p_gap_evt->params.adv_report;
if (is_uuid_present(&m_nus_uuid, p_adv_report))
{
err_code = sd_ble_gap_connect(&p_adv_report->peer_addr,
&m_scan_params,
&m_connection_param,
CONN_CFG_TAG);
if (err_code == NRF_SUCCESS)
{
// scan is automatically stopped by the connect
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("Connecting to target %02x%02x%02x%02x%02x%02x\r\n",
p_adv_report->peer_addr.addr[0],
p_adv_report->peer_addr.addr[1],
p_adv_report->peer_addr.addr[2],
p_adv_report->peer_addr.addr[3],
p_adv_report->peer_addr.addr[4],
p_adv_report->peer_addr.addr[5]
);
}
}
break;
case BLE_GAP_EVT_TIMEOUT:
{
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_SCAN)
{
NRF_LOG_INFO("Scan timed out.\r\n");
scan_start();
}
else if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
NRF_LOG_INFO("Connection Request timed out.\r\n");
}
} break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
{
NRF_LOG_DEBUG("BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST.\r\n");
// Accept parameters requested by peer.
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
// Pairing not supported
err_code = sd_ble_gap_sec_params_reply(p_ble_evt->evt.gap_evt.conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
APP_ERROR_CHECK(err_code);
break; // BLE_GAP_EVT_SEC_PARAMS_REQUEST
case BLE_GATTC_EVT_TIMEOUT:
{
// Disconnect on GATT Client timeout event.
NRF_LOG_DEBUG("GATT Client Timeout.\r\n");
err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GATTS_EVT_TIMEOUT:
{
// Disconnect on GATT Server timeout event.
NRF_LOG_DEBUG("GATT Server Timeout.\r\n");
err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
APP_ERROR_CHECK(err_code);
} break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for dispatching a BLE stack event to all modules with a BLE stack event handler.
*
* @details This function is called from the scheduler in the main loop after a BLE stack event has
* been received.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
uint16_t conn_handle;
conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
ble_conn_state_on_ble_evt(p_ble_evt);
on_ble_evt(p_ble_evt);
// Make sure taht an invalid connection handle are not passed since
// our array of modules is bound to TOTAL_LINK_COUNT.
if (conn_handle < TOTAL_LINK_COUNT)
{
ble_db_discovery_on_ble_evt(&m_ble_db_discovery[conn_handle], p_ble_evt);
ble_lbs_c_on_ble_evt(&m_ble_lbs_c[conn_handle], p_ble_evt);
}
nrf_ble_gatt_on_ble_evt(&m_gatt, p_ble_evt);
ble_nus_c_on_ble_evt(m_ble_nus_c,p_ble_evt);
}
/**@brief LED Button collector initialization.
*/
static void lbs_c_init(void)
{
ret_code_t err_code;
ble_lbs_c_init_t lbs_c_init_obj;
lbs_c_init_obj.evt_handler = lbs_c_evt_handler;
for (m_ble_lbs_c_count = 0; m_ble_lbs_c_count < TOTAL_LINK_COUNT; m_ble_lbs_c_count++)
{
err_code = ble_lbs_c_init(&m_ble_lbs_c[m_ble_lbs_c_count], &lbs_c_init_obj);
APP_ERROR_CHECK(err_code);
}
m_ble_lbs_c_count = 0;
}
/**@brief Function for initializing the BLE stack.
*
* @details Initializes the SoftDevice and the BLE event interrupts.
*/
static void ble_stack_init(void)
{
ret_code_t err_code;
nrf_clock_lf_cfg_t clock_lf_cfg = NRF_CLOCK_LFCLKSRC;
// Initialize the SoftDevice handler module.
SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL);
// Fetch the start address of the application RAM.
uint32_t ram_start = 0;
err_code = softdevice_app_ram_start_get(&ram_start);
APP_ERROR_CHECK(err_code);
// Overwrite some of the default configurations for the BLE stack.
ble_cfg_t ble_cfg;
// Configure the maximum number of connections.
memset(&ble_cfg, 0, sizeof(ble_cfg));
ble_cfg.gap_cfg.role_count_cfg.periph_role_count = PERIPHERAL_LINK_COUNT;
ble_cfg.gap_cfg.role_count_cfg.central_role_count = CENTRAL_LINK_COUNT;
ble_cfg.gap_cfg.role_count_cfg.central_sec_count = 1;
err_code = sd_ble_cfg_set(BLE_GAP_CFG_ROLE_COUNT, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code);
memset(&ble_cfg, 0, sizeof(ble_cfg));
ble_cfg.conn_cfg.params.gap_conn_cfg.conn_count = PERIPHERAL_LINK_COUNT + CENTRAL_LINK_COUNT;
ble_cfg.conn_cfg.params.gap_conn_cfg.event_length = BLE_GAP_EVENT_LENGTH_DEFAULT;
ble_cfg.conn_cfg.conn_cfg_tag = CONN_CFG_TAG;
err_code = sd_ble_cfg_set(BLE_CONN_CFG_GAP, &ble_cfg, ram_start);
APP_ERROR_CHECK(err_code);
// Enable BLE stack.
err_code = softdevice_enable(&ram_start);
APP_ERROR_CHECK(err_code);
// Register with the SoftDevice handler module for BLE events.
err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for writing to the LED characteristic of all connected clients.
*
* @details Based on if the button is pressed or released, this function writes a high or low
* LED status to the server.
*
* @param[in] button_action The button action (press/release).
* Determines if the LEDs of the servers will be ON or OFF.
*
* @return If successful NRF_SUCCESS is returned. Otherwise, the error code from @ref ble_lbs_led_status_send.
*/
static ret_code_t led_status_send_to_all(uint8_t button_action)
{
ret_code_t err_code;
for (uint32_t i = 0; i < CENTRAL_LINK_COUNT; i++)
{
err_code = ble_lbs_led_status_send(&m_ble_lbs_c[i], button_action);
if (err_code != NRF_SUCCESS &&
err_code != BLE_ERROR_INVALID_CONN_HANDLE &&
err_code != NRF_ERROR_INVALID_STATE)
{
return err_code;
}
}
return NRF_SUCCESS;
}
/**@brief Function for handling events from the button handler module.
*
* @param[in] pin_no The pin that the event applies to.
* @param[in] button_action The button action (press/release).
*/
static void button_event_handler(uint8_t pin_no, uint8_t button_action)
{
ret_code_t err_code;
switch (pin_no)
{
case LEDBUTTON_BUTTON_PIN:
err_code = led_status_send_to_all(button_action);
if (err_code == NRF_SUCCESS)
{
NRF_LOG_INFO("LBS write LED state %d\r\n", button_action);
}
break;
default:
APP_ERROR_HANDLER(pin_no);
break;
}
}
/**@brief Function for initializing the button handler module.
*/
static void buttons_init(void)
{
ret_code_t err_code;
//The array must be static because a pointer to it will be saved in the button handler module.
static app_button_cfg_t buttons[] =
{
{LEDBUTTON_BUTTON_PIN, false, BUTTON_PULL, button_event_handler}
};
err_code = app_button_init(buttons, sizeof(buttons) / sizeof(buttons[0]),
BUTTON_DETECTION_DELAY);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling database discovery events.
*
* @details This function is callback function to handle events from the database discovery module.
* Depending on the UUIDs that are discovered, this function should forward the events
* to their respective services.
*
* @param[in] p_event Pointer to the database discovery event.
*/
static void db_disc_handler(ble_db_discovery_evt_t * p_evt)
{
NRF_LOG_DEBUG("call to ble_lbs_on_db_disc_evt for instance %d and link 0x%x!\r\n",
p_evt->conn_handle,
p_evt->conn_handle);
ble_lbs_on_db_disc_evt(&m_ble_lbs_c[p_evt->conn_handle], p_evt);
}
/** @brief Database discovery initialization.
*/
static void db_discovery_init(void)
{
ret_code_t err_code = ble_db_discovery_init(db_disc_handler);
APP_ERROR_CHECK(err_code);
}
/** @brief Function to sleep until a BLE event is received by the application.
*/
static void power_manage(void)
{
ret_code_t err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);
}
/** @brief Function for initializing the log module.
*/
static void log_init(void)
{
ret_code_t err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
}
/** @brief Function for initializing the timer.
*/
static void timer_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the GATT module.
*/
static void gatt_init(void)
{
ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, NULL);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the NUS Client. */
static void nus_c_init(void)
{
ret_code_t err_code;
ble_nus_c_init_t init;
init.evt_handler = ble_nus_c_evt_handler;
for (m_ble_lbs_c_count = 0; m_ble_lbs_c_count < TOTAL_LINK_COUNT; m_ble_lbs_c_count++)
{
err_code = ble_nus_c_init(&m_ble_nus_c[m_ble_lbs_c_count], &init);
APP_ERROR_CHECK(err_code);
}
m_ble_lbs_c_count = 0;
}
/**@brief Function for initializing the UART. */
static void uart_init(void)
{
ret_code_t err_code;
const app_uart_comm_params_t comm_params =
{
.rx_pin_no = RX_PIN_NUMBER,
.tx_pin_no = TX_PIN_NUMBER,
.rts_pin_no = RTS_PIN_NUMBER,
.cts_pin_no = CTS_PIN_NUMBER,
.flow_control = APP_UART_FLOW_CONTROL_DISABLED,
.use_parity = false,
.baud_rate = UART_BAUDRATE_BAUDRATE_Baud115200
};
APP_UART_FIFO_INIT(&comm_params,
UART_RX_BUF_SIZE,
UART_TX_BUF_SIZE,
uart_event_handle,
APP_IRQ_PRIORITY_LOWEST,
err_code);
APP_ERROR_CHECK(err_code);
}
int main(void)
{
log_init();
uart_init();
timer_init();
leds_init();
buttons_init();
ble_stack_init();
gatt_init();
db_discovery_init();
//lbs_c_init();
ble_conn_state_init();
nus_c_init();
NRF_LOG_INFO("Multilink example started.\r\n");
// Start scanning for peripherals and initiate connection to devices which
// advertise.
scan_start();
// Turn on the LED to signal scanning.
bsp_board_led_on(CENTRAL_SCANNING_LED);
for (;;)
{
if (NRF_LOG_PROCESS() == false)
{
// Wait for BLE events.
power_manage();
}
}
}
I don't understand this error 100%, is it because it can't match the pointers?
Thanks for your help :)
&m_ble_nus_c is of type ble_nus_c_t (*)[8], while you need to provide ble_nus_c_t. Although &m_ble_nus_c refers to the first element in the array, it is of wrong type. It should work to use &m_ble_nus[0] instead.
When I add a [0] I've got 8 errors.
Code Line: ret_val = ble_nus_c_string_send(&m_ble_nus_c[0], data_array, index);
Errors:
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol app_uart_get (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol app_uart_init (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_c_handles_assign (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_c_init (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_c_on_ble_evt (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_c_string_send (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_c_tx_notif_enable (referred from main.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol ble_nus_chars_received_uart_print (referred from main.o).
All necessary files have to be included in the project. It may for example be useful to have a look at this thread.
hi kristin ,
i am implementing osde for gps clock master and slave communication one master and no of slave .. which example should i take to to comuanicate those devices . actually am tested with
ble_app _uart(); in this code master sending the data to app (nrf connect), but i want to sen data another ble.
