Hi there,
We have tried to implement the bluetooth uart service with the standard example project (ble_app_uart). Up to this point everything works well. But for a custom solution we need to make some adjustments.
For security reasons, the bluetooth must be able to be switched on and off via UART.
This causes problems. In some cases the bluetooth service seems to crash. It looks like these problems are caused by the string processing in the main process. When these are removed, everything works fine again. I know that Bluetooth LE has tight timing constraints so the code got stript down to the bare minimum. We tried to use software timers but those made it worse. I hope this makes some sense with the code.
Best regards
Maikel
/**
* Copyright (c) 2014 - 2021, 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.
*
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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*
*/
/** @file
*
* @defgroup ble_sdk_uart_over_ble_main main.c
* @{
* @ingroup ble_sdk_app_nus_eval
* @brief UART over BLE application main file.
*
* This file contains the source code for a sample application that uses the Nordic UART service.
* This application uses the @ref srvlib_conn_params module.
*/
#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "ble_hci.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "app_timer.h"
#include "ble_nus.h"
#include "app_uart.h"
#include "app_util_platform.h"
#include "bsp_btn_ble.h"
#include "nrf_pwr_mgmt.h"
#include "stdlib.h"
#include "stdio.h"
//#include "timer.h"
#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */
#define DEVICE_NAME "Field calibration tool" /**< Name of device. Will be included in the advertising data. */
#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */
#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */
#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
#define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */
BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT); /**< BLE NUS service instance. */
NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr); /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */
// UART Write function
static void uartPut(const char *dataRequest, const int size);
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
static ble_uuid_t m_adv_uuids[] = {{BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}};
bool bluetoothEN;
typedef enum
{
config,
Bluetooth,
idle,
} configState_t;
typedef enum
{
gas1Req,
gas2Req,
canChannelReq,
Exit
} requestType_t;
typedef struct
{
char inhibitInfo[100];
char Info[10][100];
bool deviceNameSet;
char deviceName[40];
int index;
bool dataRecieved[3];
requestType_t requestIndex;
bool dataRequested[3];
requestType_t recievedIndex;
} deviceConfigInfo_t;
struct uartDevice_t
{
configState_t uartOutputState;
deviceConfigInfo_t deviceConfigInfo;
} uartDevice;
enum
{
LED1 = 29,
LED_RED = 29,
LED2 = 28,
LED_GREEN = 28,
};
struct LED_t
{
bool led1ON;
bool led2ON;
}LEDs;
typedef enum{
request,
waiting,
responds,
}idleHandleState_t;
typedef struct {
idleHandleState_t state;
bool notIdle;
}idleHandler_t;
idleHandler_t idleHandlerS;
static int idleCounter = 0;
/**@brief Function for assert macro callback.
*
* @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 analyse
* 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(DEAD_BEEF, line_num, p_file_name);
}
char *getElementAt(char *inpString, int pos)
{
char *token = strtok(inpString, " ");
int i = 0;
while (token != NULL && i < 100)
{
if (i == pos)
{
return token;
}
i++;
token = strtok(NULL, " ");
}
return NULL;
}
/**@brief Function for initializing the timer module.
*/
static void timers_init(void)
{
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for the GAP initialization.
*
* @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
* the device. It also sets the permissions and appearance.
*/
static void gap_params_init(void)
{
uint32_t err_code;
ble_gap_conn_params_t gap_conn_params;
ble_gap_conn_sec_mode_t sec_mode;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
if(uartDevice.deviceConfigInfo.deviceNameSet == true)
{
err_code = sd_ble_gap_device_name_set(&sec_mode,
(const uint8_t*)uartDevice.deviceConfigInfo.deviceName,//(const uint8_t *)uartDevice.deviceConfigInfo.deviceName,
strlen(DEVICE_NAME));
}
else
{
err_code = sd_ble_gap_device_name_set(&sec_mode,
(const uint8_t*)DEVICE_NAME,//(const uint8_t *)uartDevice.deviceConfigInfo.deviceName,
strlen(DEVICE_NAME));
}
APP_ERROR_CHECK(err_code);
memset(&gap_conn_params, 0, sizeof(gap_conn_params));
gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
gap_conn_params.slave_latency = SLAVE_LATENCY;
gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;
err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling Queued Write Module errors.
*
* @details A pointer to this function will be passed to each service which may need to inform the
* application about an error.
*
* @param[in] nrf_error Error code containing information about what went wrong.
*/
static void nrf_qwr_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
static uint8_t dataDebugArr[30];
/**@brief Function for handling the data from the Nordic UART Service.
*
* @details This function will process the data received from the Nordic UART BLE Service and send
* it to the UART module.
*
* @param[in] p_evt Nordic UART Service event.
*/
/**@snippet [Handling the data received over BLE] */
static void nus_data_handler(ble_nus_evt_t * p_evt)
{
if (p_evt->type == BLE_NUS_EVT_RX_DATA)
{
uint32_t err_code;
NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);
for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
{
idleCounter = 0; //Reset idle counter because the device is still active
uint32_t err_code;
err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
}
/*
uint32_t err_code;
NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on UART.");
NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);
for (uint32_t i = 0; i < p_evt->params.rx_data.length; i++)
{
do
{
err_code = app_uart_put(p_evt->params.rx_data.p_data[i]);
if ((err_code != NRF_SUCCESS) && (err_code != NRF_ERROR_BUSY))
{
NRF_LOG_ERROR("Failed receiving NUS message. Error 0x%x. ", err_code);
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_BUSY);
}
if (p_evt->params.rx_data.p_data[p_evt->params.rx_data.length - 1] == '\r')
{
while (app_uart_put('\n') == NRF_ERROR_BUSY);
}
*/
}
}
/**@snippet [Handling the data received over BLE] */
/**@brief Function for initializing services that will be used by the application.
*/
static void services_init(void)
{
uint32_t err_code;
ble_nus_init_t nus_init;
nrf_ble_qwr_init_t qwr_init = {0};
// Initialize Queued Write Module.
qwr_init.error_handler = nrf_qwr_error_handler;
err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
APP_ERROR_CHECK(err_code);
// Initialize NUS.
memset(&nus_init, 0, sizeof(nus_init));
nus_init.data_handler = nus_data_handler;
err_code = ble_nus_init(&m_nus, &nus_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling an event from the Connection Parameters Module.
*
* @details This function will be called for all events in the Connection Parameters Module
* which are passed to the application.
*
* @note All this function does is to disconnect. This could have been done by simply setting
* the disconnect_on_fail config parameter, but instead we use the event handler
* mechanism to demonstrate its use.
*
* @param[in] p_evt Event received from the Connection Parameters Module.
*/
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
{
uint32_t err_code;
if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
{
err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function for handling errors from the Connection Parameters module.
*
* @param[in] nrf_error Error code containing information about what went wrong.
*/
static void conn_params_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
/**@brief Function for initializing the Connection Parameters module.
*/
static void conn_params_init(void)
{
uint32_t err_code;
ble_conn_params_init_t cp_init;
memset(&cp_init, 0, sizeof(cp_init));
cp_init.p_conn_params = NULL;
cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
cp_init.disconnect_on_fail = false;
cp_init.evt_handler = on_conn_params_evt;
cp_init.error_handler = conn_params_error_handler;
err_code = ble_conn_params_init(&cp_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for putting the chip into sleep mode.
*
* @note This function will not return.
*/
static void sleep_mode_enter(void)
{
uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
// Prepare wakeup buttons.
err_code = bsp_btn_ble_sleep_mode_prepare();
APP_ERROR_CHECK(err_code);
// Go to system-off mode (this function will not return; wakeup will cause a reset).
err_code = sd_power_system_off();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling advertising events.
*
* @details This function will be called for advertising events which are passed to the application.
*
* @param[in] ble_adv_evt Advertising event.
*/
static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
uint32_t err_code;
switch (ble_adv_evt)
{
case BLE_ADV_EVT_FAST:
err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
APP_ERROR_CHECK(err_code);
break;
case BLE_ADV_EVT_IDLE:
sleep_mode_enter();
break;
default:
break;
}
}
/**@brief Function for handling BLE events.
*
* @param[in] p_ble_evt Bluetooth stack event.
* @param[in] p_context Unused.
*/
static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
{
uint32_t err_code;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
NRF_LOG_INFO("Connected");
err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
APP_ERROR_CHECK(err_code);
m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected");
// LED indication will be changed when advertising starts.
m_conn_handle = BLE_CONN_HANDLE_INVALID;
break;
case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
{
NRF_LOG_DEBUG("PHY update request.");
ble_gap_phys_t const phys =
{
.rx_phys = BLE_GAP_PHY_AUTO,
.tx_phys = BLE_GAP_PHY_AUTO,
};
err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
APP_ERROR_CHECK(err_code);
} break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
// Pairing not supported
err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
APP_ERROR_CHECK(err_code);
break;
case BLE_GATTS_EVT_SYS_ATTR_MISSING:
// No system attributes have been stored.
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
APP_ERROR_CHECK(err_code);
break;
case BLE_GATTC_EVT_TIMEOUT:
// Disconnect on GATT Client timeout event.
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.
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 the SoftDevice initialization.
*
* @details This function initializes the SoftDevice and the BLE event interrupt.
*/
static void ble_stack_init(void)
{
ret_code_t err_code;
err_code = nrf_sdh_enable_request();
APP_ERROR_CHECK(err_code);
// Configure the BLE stack using the default settings.
// Fetch the start address of the application RAM.
uint32_t ram_start = 0;
err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
APP_ERROR_CHECK(err_code);
// Enable BLE stack.
err_code = nrf_sdh_ble_enable(&ram_start);
APP_ERROR_CHECK(err_code);
// Register a handler for BLE events.
NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
}
/**@brief Function for handling events from the GATT library. */
void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
{
if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED))
{
m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
}
NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x",
p_gatt->att_mtu_desired_central,
p_gatt->att_mtu_desired_periph);
}
/**@brief Function for initializing the GATT library. */
void gatt_init(void)
{
ret_code_t err_code;
err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
APP_ERROR_CHECK(err_code);
err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling events from the BSP module.
*
* @param[in] event Event generated by button press.
*/
void bsp_event_handler(bsp_event_t event)
{
uint32_t err_code;
switch (event)
{
case BSP_EVENT_SLEEP:
sleep_mode_enter();
break;
case BSP_EVENT_DISCONNECT:
err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
if (err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
break;
case BSP_EVENT_WHITELIST_OFF:
if (m_conn_handle == BLE_CONN_HANDLE_INVALID)
{
err_code = ble_advertising_restart_without_whitelist(&m_advertising);
if (err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
}
break;
default:
break;
}
}
/**@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.
*/
/**@snippet [Handling the data received over UART] */
void uart_event_handle(app_uart_evt_t * p_event)
{
static uint8_t data_array[100];
static uint8_t index = 0;
uint32_t err_code;
switch (p_event->evt_type)
{
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))
{
if (index > 1)
{
NRF_LOG_DEBUG("Ready to send data over BLE NUS");
NRF_LOG_HEXDUMP_DEBUG(data_array, index);
///////////////////////////////////
// Bluetooth specific functionality
///////////////////////////////////
switch (uartDevice.uartOutputState)
{
case Bluetooth:
{
do
{
uint16_t length = (uint16_t)index;
err_code = ble_nus_data_send(&m_nus, data_array, &length, m_conn_handle);
if ((err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_NOT_FOUND))
{
APP_ERROR_CHECK(err_code);
}
} while (err_code == NRF_ERROR_RESOURCES);
index = 0;
break;
}
////////////////////////////////////
// Function for startup configuration
////////////////////////////////////
case config:
{
if (data_array[index - 1] == '\n')
{
uint16_t length = (uint16_t)index;
memcpy(&uartDevice.deviceConfigInfo.Info[uartDevice.deviceConfigInfo.index++], data_array, length);
uartDevice.deviceConfigInfo.dataRecieved[uartDevice.deviceConfigInfo.recievedIndex] = true;
index = 0;
}
break;
}
//////////////////////////////////////////
// Function to block UART from other ports
//////////////////////////////////////////
case idle:
{
if (data_array[index - 1] == '\n')
{
if(idleHandlerS.state == waiting)
{
char active[10];
uint16_t length = (uint16_t)index;
static unsigned int inhibitVal = 0;
static int valide = 0;
valide = sscanf((char*)data_array, "%*s %*u %*s %*u %*s %u", &inhibitVal);
if (valide == 1)
{
idleHandlerS.notIdle = (bool)inhibitVal;
}
idleHandlerS.state = responds;
// strcpy(idleHandlerS.responds, (char*)data_array);
// memcpy(&uartDevice.deviceConfigInfo.Info[uartDevice.deviceConfigInfo.index++], data_array, length);
// uartDevice.deviceConfigInfo.dataRecieved[uartDevice.deviceConfigInfo.recievedIndex] = true;
}
index = 0;
}
break;
}
}
}
}
}
break;
case APP_UART_COMMUNICATION_ERROR:
{
APP_ERROR_HANDLER(p_event->data.error_communication);
break;
}
case APP_UART_FIFO_ERROR:
{
APP_ERROR_HANDLER(p_event->data.error_code);
break;
}
default:
{
break;
}
}
}
/**@snippet [Handling the data received over UART] */
/**@brief Function for initializing the UART module.
*/
/**@snippet [UART Initialization] */
static void uart_init(void)
{
uint32_t err_code;
app_uart_comm_params_t const 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,
#if defined (UART_PRESENT)
.baud_rate = NRF_UART_BAUDRATE_115200
#else
.baud_rate = NRF_UARTE_BAUDRATE_115200
#endif
};
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);
}
/**@snippet [UART Initialization] */
/**@brief Function for initializing the Advertising functionality.
*/
static void advertising_init(void)
{
uint32_t err_code;
ble_advertising_init_t init;
memset(&init, 0, sizeof(init));
init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
init.advdata.include_appearance = false;
init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
init.srdata.uuids_complete.p_uuids = m_adv_uuids;
init.config.ble_adv_fast_enabled = true;
init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
init.config.ble_adv_fast_timeout = APP_ADV_DURATION;
init.evt_handler = on_adv_evt;
err_code = ble_advertising_init(&m_advertising, &init);
APP_ERROR_CHECK(err_code);
ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
}
/**@brief Function for initializing buttons and leds.
*
* @param[out] p_erase_bonds Will be true if the clear bonding button was pressed to wake the application up.
*/
static void buttons_leds_init(bool * p_erase_bonds)
{
bsp_event_t startup_event;
uint32_t err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_event_handler);
APP_ERROR_CHECK(err_code);
err_code = bsp_btn_ble_init(NULL, &startup_event);
APP_ERROR_CHECK(err_code);
*p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA);
}
/**@brief Function for initializing the nrf log module.
*/
static void log_init(void)
{
ret_code_t err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
}
/**@brief Function for initializing power management.
*/
static void power_management_init(void)
{
ret_code_t err_code;
err_code = nrf_pwr_mgmt_init();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for starting advertising.
*/
static void advertising_start(void)
{
if(!bluetoothEN)
{
uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
bluetoothEN = true;
}
}
/**@brief Funtion for stoping advertising.
*/
static void advertising_stop() //TODO: Test this function
{
if(bluetoothEN)
{
if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
(void)sd_ble_gap_adv_stop(m_advertising.adv_handle);
bluetoothEN = false;
//NRF_RADIO->TASKS_DISABLE;
}
}
static void uartPut(const char *dataRequest, const int size)
{
for (uint32_t i = 0; i < size; i++)
{
uint32_t err_code;
err_code = app_uart_put(dataRequest[i]);
}
}
void configureBluetoothName()
{
static char channel1_gas[50];
static char channel2_gas[50];
static char can_channel[50];
static char inhibitChar[50];
static unsigned int sensor_channel;
static unsigned int channel_InhibitI;
bool idleBool = false;
uartDevice.uartOutputState = config;
while (uartDevice.uartOutputState == config)
{
// Request data if not allready requested
if (!uartDevice.deviceConfigInfo.dataRequested[uartDevice.deviceConfigInfo.requestIndex])
{
// Request data for channel 1 & channel 2
switch (uartDevice.deviceConfigInfo.requestIndex)
{
case gas1Req:
{
uartPut("1", sizeof("1")); // Send deviceInfo 1
break;
}
case gas2Req:
{
uartPut("2", sizeof("2")); // Send deviceInfo 2
break;
}
case canChannelReq:
{
uartPut("?", sizeof("?"));
break;
}
default:
break;
}
uartDevice.deviceConfigInfo.dataRequested[uartDevice.deviceConfigInfo.requestIndex] = true;
}
// Handle Responds after Request has been handled
else if (uartDevice.deviceConfigInfo.dataRecieved[uartDevice.deviceConfigInfo.recievedIndex])
{
if (uartDevice.deviceConfigInfo.recievedIndex == Exit)
{
if(idleBool)
{
uartDevice.uartOutputState = idle;
uartPut("0", sizeof("0")); // disable string output
}
else
{
uartDevice.uartOutputState = Bluetooth;
}
uartDevice.deviceConfigInfo.deviceNameSet = true;
}
else
{
// Request data for channel 1 & channel 2
switch (uartDevice.deviceConfigInfo.recievedIndex)
{
case gas1Req:
{
sprintf(channel1_gas, "%s", getElementAt(uartDevice.deviceConfigInfo.Info[gas1Req], 6));
break;
}
case gas2Req:
{
sprintf(channel2_gas, "%s", getElementAt(uartDevice.deviceConfigInfo.Info[gas2Req], 6));
break;
}
case canChannelReq:
{
// char* pString1 = getElementAt(uartDevice.deviceConfigInfo.Info[canChannelReq], 1);
// char* pString2 = getElementAt(uartDevice.deviceConfigInfo.Info[canChannelReq], 5);
// strcpy(can_channel, pString1);
// strcpy(uartDevice.deviceConfigInfo.inhibitInfo, pString2);
sscanf(uartDevice.deviceConfigInfo.Info[canChannelReq],"%*s %u %*s %*u %*s %u", &sensor_channel, &channel_InhibitI);
if(channel_InhibitI == 0)
{
idleBool = true;
}
break;
}
default:
{
break;
}
}
}
uartDevice.deviceConfigInfo.recievedIndex++;
uartDevice.deviceConfigInfo.requestIndex++;
}
}
sprintf(uartDevice.deviceConfigInfo.deviceName, "Sensor_%u_%s_%s", sensor_channel, channel1_gas, channel2_gas);
printf("\nDevice name: %s\n", uartDevice.deviceConfigInfo.deviceName);
}
void led_init()
{
nrf_gpio_cfg_output(LED_GREEN);
nrf_gpio_cfg_output(LED_RED);
nrf_gpio_pin_toggle(LED_GREEN);
nrf_gpio_pin_toggle(LED_RED);
}
void timerHandler(void* p_context)
{
nrf_gpio_pin_toggle(LED_GREEN);
}
void idleHandler()
{
static unsigned int channel_InhibitI;
if(!bluetoothEN)
{
switch(idleHandlerS.state)
{
case request:
{
uartPut("0", sizeof("0"));
uartPut("?", sizeof("?"));
idleHandlerS.state = waiting;
break;
}
case waiting:
{
uartPut("?", sizeof("?"));
nrf_gpio_pin_toggle(LED_RED);
break;
}
case responds:
{
if(idleHandlerS.notIdle == true)
{
uartDevice.uartOutputState = Bluetooth;
}
else
{
uartDevice.uartOutputState = idle;
}
idleHandlerS.state = request;
break;
}
}
}
}
/**@brief Function for handling the idle state (main loop).
*
* @details If there is no pending log operation, then sleep until next the next event occurs.
*/
static void idle_state_handle(void)
{
if (NRF_LOG_PROCESS() == false)
{
nrf_pwr_mgmt_run();
}
}
/**@brief Application main function.
*/
int main(void)
{
bool erase_bonds;
//////////////////////////////////////////
// Initialize UART and generic periferals
//////////////////////////////////////////
uartDevice.uartOutputState = Bluetooth; //Only for test purpouses
led_init();
uart_init();
power_management_init();
configureBluetoothName();
//timers_init();
//log_init();
//buttons_leds_init(&erase_bonds);
//////////////////////////////////////////
// Initialize Bluetooth specific functions
//////////////////////////////////////////
ble_stack_init();
gap_params_init();
gatt_init();
services_init();
advertising_init();
conn_params_init();
//////////////////////////////////////////
// Enter main loop
//////////////////////////////////////////
for (;;)
{
static uint32_t var;
static uint32_t varOld;
const uint32_t deltaVar = 32768;
var = NRF_RTC0->COUNTER;
if((var-varOld) > deltaVar)
{
varOld = var;
idleCounter++;
nrf_gpio_pin_toggle(LED_GREEN);
if(idleCounter > 3600)
{
idleCounter = 0;
uartDevice.uartOutputState = idle;
}
if(uartDevice.uartOutputState == idle)
{
advertising_stop();
idleHandler();
}
}
else if(uartDevice.uartOutputState == Bluetooth)
{
advertising_start();
idle_state_handle();
}
}
}
/**
* @}
*/
