Hello everybody,
I'm working on a Project with nrf52dk(nrf52832), and sdk 15.0.0 where I need to read the data from multiple sensors with twi/i2c and send the data via ble to a phone-app.
I'm now facing the same problem for a few days and don't really know how to solve it and hope you can help me.
I attached the code for a better understanding.
In this project i have two i2c devices which the first one is for acceleration and gyro data and the second one is temperature and pressure.
The main problem is that i can't get the data from the second i2c sensor, the first sensor is working fine and transfering the data via uart and ble.
From the second sensor i get the chip id but when i ask for the data from the register I don't get any result.
The two sensors work well togheter without ble, on another project using an evaluation of the twi_scanner from sdk.
Best Regards Ale
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*
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* software without specific prior written permission.
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/** @file
*
* @defgroup ble_sdk_app_template_main main.c
* @{
* @ingroup ble_sdk_app_template
* @brief Template project main file.
*
* This file contains a template for creating a new application. It has the code necessary to wakeup
* from button, advertise, get a connection restart advertising on disconnect and if no new
* connection created go back to system-off mode.
* It can easily be used as a starting point for creating a new application, the comments identified
* with 'YOUR_JOB' indicates where and how you can customize.
*/
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_srv_common.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 "app_timer.h"
#include "fds.h"
#include "peer_manager.h"
#include "bsp_btn_ble.h"
#include "sensorsim.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "app_util_platform.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "ble_cus.h"
#include "nrf_delay.h"
#include "mpu6050.h"
#include "bme680.h"
#define DEVICE_NAME "BLE Poly" /**< Name of device. Will be included in the advertising data. */
#define MANUFACTURER_NAME "NordicSemiconductor" /**< Manufacturer. Will be passed to Device Information Service. */
#define APP_ADV_INTERVAL 300 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.1 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, UNIT_1_25_MS) /**< Maximum acceptable connection interval (0.2 second). */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). */
#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 NOTIFICATION_INTERVAL APP_TIMER_TICKS(250)
#define SEC_PARAM_BOND 1 /**< Perform bonding. */
#define SEC_PARAM_MITM 0 /**< Man In The Middle protection not required. */
#define SEC_PARAM_LESC 0 /**< LE Secure Connections not enabled. */
#define SEC_PARAM_KEYPRESS 0 /**< Keypress notifications not enabled. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0 /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7 /**< Minimum encryption key size. */
#define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size. */
#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
#define BUTTON_1 13
volatile int16_t result = 0;
volatile float precise_result = 0;
// create arrays which will hold x,y & z co-ordinates values of acc and gyro
static int16_t AccValue[3], GyroValue[3];;
NRF_BLE_GATT_DEF(m_gatt);
NRF_BLE_QWR_DEF(m_qwr); /**< GATT module instance. */
BLE_CUS_DEF(m_cus); /**< Context for the Queued Write module.*/
BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */
APP_TIMER_DEF(m_notification_timer_id);
static uint8_t m_custom_value = 0;
static uint16_t xaxis = 0;
static uint16_t yaxis = 0;
static uint16_t zaxis = 0;
static uint16_t xaxisG = 0;
static uint16_t yaxisG = 0;
static uint16_t zaxisG = 0;
static uint8_t hall_sensor_value;
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
/* YOUR_JOB: Declare all services structure your application is using
* BLE_XYZ_DEF(m_xyz);
*/
// YOUR_JOB: Use UUIDs for service(s) used in your application.
static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifiers. */
{
{CUSTOM_SERVICE_UUID, BLE_UUID_TYPE_VENDOR_BEGIN }
};
static void advertising_start(bool erase_bonds);
/**@brief Callback function for 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] 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);
}
/**@brief Function for handling Peer Manager events.
*
* @param[in] p_evt Peer Manager event.
*/
static void pm_evt_handler(pm_evt_t const * p_evt)
{
ret_code_t err_code;
switch (p_evt->evt_id)
{
case PM_EVT_BONDED_PEER_CONNECTED:
{
NRF_LOG_INFO("Connected to a previously bonded device.");
} break;
case PM_EVT_CONN_SEC_SUCCEEDED:
{
NRF_LOG_INFO("Connection secured: role: %d, conn_handle: 0x%x, procedure: %d.",
ble_conn_state_role(p_evt->conn_handle),
p_evt->conn_handle,
p_evt->params.conn_sec_succeeded.procedure);
} break;
case PM_EVT_CONN_SEC_FAILED:
{
/* Often, when securing fails, it shouldn't be restarted, for security reasons.
* Other times, it can be restarted directly.
* Sometimes it can be restarted, but only after changing some Security Parameters.
* Sometimes, it cannot be restarted until the link is disconnected and reconnected.
* Sometimes it is impossible, to secure the link, or the peer device does not support it.
* How to handle this error is highly application dependent. */
} break;
case PM_EVT_CONN_SEC_CONFIG_REQ:
{
// Reject pairing request from an already bonded peer.
pm_conn_sec_config_t conn_sec_config = {.allow_repairing = false};
pm_conn_sec_config_reply(p_evt->conn_handle, &conn_sec_config);
} break;
case PM_EVT_STORAGE_FULL:
{
// Run garbage collection on the flash.
err_code = fds_gc();
if (err_code == FDS_ERR_NO_SPACE_IN_QUEUES)
{
// Retry.
}
else
{
APP_ERROR_CHECK(err_code);
}
} break;
case PM_EVT_PEERS_DELETE_SUCCEEDED:
{
advertising_start(false);
} break;
case PM_EVT_PEER_DATA_UPDATE_FAILED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.peer_data_update_failed.error);
} break;
case PM_EVT_PEER_DELETE_FAILED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.peer_delete_failed.error);
} break;
case PM_EVT_PEERS_DELETE_FAILED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.peers_delete_failed_evt.error);
} break;
case PM_EVT_ERROR_UNEXPECTED:
{
// Assert.
APP_ERROR_CHECK(p_evt->params.error_unexpected.error);
} break;
case PM_EVT_CONN_SEC_START:
case PM_EVT_PEER_DATA_UPDATE_SUCCEEDED:
case PM_EVT_PEER_DELETE_SUCCEEDED:
case PM_EVT_LOCAL_DB_CACHE_APPLIED:
case PM_EVT_LOCAL_DB_CACHE_APPLY_FAILED:
// This can happen when the local DB has changed.
case PM_EVT_SERVICE_CHANGED_IND_SENT:
case PM_EVT_SERVICE_CHANGED_IND_CONFIRMED:
default:
break;
}
}
//function to get the data from the accelerometer
/**@brief Function for handling the Battery measurement timer timeout.
*
* @details This function will be called each time the battery level measurement timer expires.
*
* @param[in] p_context Pointer used for passing some arbitrary information (context) from the
* app_start_timer() call to the timeout handler.
*/
static void notification_timeout_handler(void * p_context)
{
UNUSED_PARAMETER(p_context);
ret_code_t err_code;
// Change the value of m_custom_value when button change state.
if(nrf_gpio_pin_read(BUTTON_1))
{
m_custom_value= 5;
}
else{
m_custom_value= 1;
}
// Change the value of m_custom_value when button change state.
if(nrf_gpio_pin_read(HALL_SENSOR))
{
hall_sensor_value = 0;
}
else{
hall_sensor_value = 1;
}
//Send the acceleromter data, calling a function to get the data and then transfer them
if(MPU6050_ReadAcc(&AccValue[0], &AccValue[1], &AccValue[2]) == true) // Read acc value from mpu6050 internal registers and save them in the array
{
NRF_LOG_INFO("ACC Values: x = %d y = %d z = %d", AccValue[0], AccValue[1], AccValue[2]); // display the read values
NRF_LOG_FLUSH();
}
else
{
NRF_LOG_INFO("Reading ACC values Failed!!!"); // if reading was unsuccessful then let the user know about it
NRF_LOG_FLUSH();
}
xaxis = AccValue[0];
yaxis = AccValue[1];
zaxis = AccValue[2];
if(MPU6050_ReadGyro(&GyroValue[0], &GyroValue[1], &GyroValue[2]) == true) // read the gyro values from mpu6050's internal registers and save them in another array
{
NRF_LOG_INFO("GYRO Values: x = %d y = %d z = %d", GyroValue[0], GyroValue[1], GyroValue[2]); // display then values
NRF_LOG_FLUSH();
}
else {
NRF_LOG_INFO("Reading GYRO values Failed!!!");
NRF_LOG_FLUSH();
}
xaxisG = GyroValue[0];
yaxisG = GyroValue[1];
zaxisG = GyroValue[2];
getsensordata();
ble_cus_custom_value_update1(&m_cus, m_custom_value);
nrf_delay_ms(1);
ble_cus_custom_value_update2(&m_cus, xaxis);
nrf_delay_ms(1);
ble_cus_custom_value_update3(&m_cus, yaxis);
nrf_delay_ms(1);
ble_cus_custom_value_update4(&m_cus, zaxis);
nrf_delay_ms(1);
ble_cus_custom_value_update5(&m_cus, hall_sensor_value);
nrf_delay_ms(1);
ble_cus_custom_value_update6(&m_cus, xaxisG);
nrf_delay_ms(1);
ble_cus_custom_value_update7(&m_cus, yaxisG);
nrf_delay_ms(10);
ble_cus_custom_value_update8(&m_cus, zaxisG);
nrf_delay_ms(1);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for the Timer initialization.
*
* @details Initializes the timer module. This creates and starts application timers.
*/
static void timers_init(void)
{
// Initialize timer module.
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
// Create timers.
err_code = app_timer_create(&m_notification_timer_id, APP_TIMER_MODE_REPEATED, notification_timeout_handler);
APP_ERROR_CHECK(err_code);
/* YOUR_JOB: Create any timers to be used by the application.
Below is an example of how to create a timer.
For every new timer needed, increase the value of the macro APP_TIMER_MAX_TIMERS by
one.
ret_code_t err_code;
err_code = app_timer_create(&m_app_timer_id, APP_TIMER_MODE_REPEATED, timer_timeout_handler);
APP_ERROR_CHECK(err_code); */
}
/**@brief Function for the GAP initialization.
*
* @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
* device including the device name, appearance, and the preferred connection parameters.
*/
static void gap_params_init(void)
{
ret_code_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);
err_code = sd_ble_gap_device_name_set(&sec_mode,
(const uint8_t *)DEVICE_NAME,
strlen(DEVICE_NAME));
APP_ERROR_CHECK(err_code);
/* YOUR_JOB: Use an appearance value matching the application's use case.
err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_);
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 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 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);
}
/**@brief Function for handling the YYY Service events.
* YOUR_JOB implement a service handler function depending on the event the service you are using can generate
*
* @details This function will be called for all YY Service events which are passed to
* the application.
*
* @param[in] p_yy_service YY Service structure.
* @param[in] p_evt Event received from the YY Service.
*
*
static void on_yys_evt(ble_yy_service_t * p_yy_service,
ble_yy_service_evt_t * p_evt)
{
switch (p_evt->evt_type)
{
case BLE_YY_NAME_EVT_WRITE:
APPL_LOG("[APPL]: charact written with value %s. ", p_evt->params.char_xx.value.p_str);
break;
default:
// No implementation needed.
break;
}
}
*/
/**@brief Function for handling the Custom Service Service events.
*
* @details This function will be called for all Custom Service events which are passed to
* the application.
*
* @param[in] p_cus_service Custom Service structure.
* @param[in] p_evt Event received from the Custom Service.
*
*/
static void on_cus_evt(ble_cus_t * p_cus_service,
ble_cus_evt_t * p_evt)
{
ret_code_t err_code;
switch(p_evt->evt_type)
{
case BLE_CUS_EVT_NOTIFICATION_ENABLED:
err_code = app_timer_start(m_notification_timer_id, NOTIFICATION_INTERVAL, NULL);
APP_ERROR_CHECK(err_code);
break;
case BLE_CUS_EVT_NOTIFICATION_DISABLED:
err_code = app_timer_stop(m_notification_timer_id);
APP_ERROR_CHECK(err_code);
break;
case BLE_CUS_EVT_CONNECTED:
break;
case BLE_CUS_EVT_DISCONNECTED:
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for initializing services that will be used by the application.
*/
static void services_init(void)
{
ret_code_t err_code;
nrf_ble_qwr_init_t qwr_init = {0};
ble_cus_init_t cus_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 CUS Service init structure to zero.
cus_init.evt_handler = on_cus_evt;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.cccd_write_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cus_init.custom_value_char_attr_md.write_perm);
err_code = ble_cus_init(&m_cus, &cus_init);
APP_ERROR_CHECK(err_code);
/* YOUR_JOB: Add code to initialize the services used by the application.
ble_xxs_init_t xxs_init;
ble_yys_init_t yys_init;
// Initialize XXX Service.
memset(&xxs_init, 0, sizeof(xxs_init));
xxs_init.evt_handler = NULL;
xxs_init.is_xxx_notify_supported = true;
xxs_init.ble_xx_initial_value.level = 100;
err_code = ble_bas_init(&m_xxs, &xxs_init);
APP_ERROR_CHECK(err_code);
// Initialize YYY Service.
memset(&yys_init, 0, sizeof(yys_init));
yys_init.evt_handler = on_yys_evt;
yys_init.ble_yy_initial_value.counter = 0;
err_code = ble_yy_service_init(&yys_init, &yy_init);
APP_ERROR_CHECK(err_code);
*/
}
/**@brief Function for handling 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)
{
ret_code_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 a Connection Parameters error.
*
* @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)
{
ret_code_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 starting timers.
*/
static void application_timers_start(void)
{
/* YOUR_JOB: Start your timers. below is an example of how to start a timer.
ret_code_t err_code;
err_code = app_timer_start(m_app_timer_id, TIMER_INTERVAL, NULL);
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)
{
ret_code_t err_code;
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)
{
ret_code_t err_code;
switch (ble_adv_evt)
{
case BLE_ADV_EVT_FAST:
NRF_LOG_INFO("Fast advertising.");
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)
{
ret_code_t err_code = NRF_SUCCESS;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected.");
// LED indication will be changed when advertising starts.
break;
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_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_GATTC_EVT_TIMEOUT:
// Disconnect on GATT Client timeout event.
NRF_LOG_DEBUG("GATT Client Timeout.");
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.");
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 initializing the BLE stack.
*
* @details 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 the Peer Manager initialization.
*/
static void peer_manager_init(void)
{
ble_gap_sec_params_t sec_param;
ret_code_t err_code;
err_code = pm_init();
APP_ERROR_CHECK(err_code);
memset(&sec_param, 0, sizeof(ble_gap_sec_params_t));
// Security parameters to be used for all security procedures.
sec_param.bond = SEC_PARAM_BOND;
sec_param.mitm = SEC_PARAM_MITM;
sec_param.lesc = SEC_PARAM_LESC;
sec_param.keypress = SEC_PARAM_KEYPRESS;
sec_param.io_caps = SEC_PARAM_IO_CAPABILITIES;
sec_param.oob = SEC_PARAM_OOB;
sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
sec_param.kdist_own.enc = 1;
sec_param.kdist_own.id = 1;
sec_param.kdist_peer.enc = 1;
sec_param.kdist_peer.id = 1;
err_code = pm_sec_params_set(&sec_param);
APP_ERROR_CHECK(err_code);
err_code = pm_register(pm_evt_handler);
APP_ERROR_CHECK(err_code);
}
/**@brief Clear bond information from persistent storage.
*/
static void delete_bonds(void)
{
ret_code_t err_code;
NRF_LOG_INFO("Erase bonds!");
err_code = pm_peers_delete();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling events from the BSP module.
*
* @param[in] event Event generated when button is pressed.
*/
static void bsp_event_handler(bsp_event_t event)
{
ret_code_t err_code;
switch (event)
{
case BSP_EVENT_SLEEP:
sleep_mode_enter();
break; // BSP_EVENT_SLEEP
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; // BSP_EVENT_DISCONNECT
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; // BSP_EVENT_KEY_0
default:
break;
}
}
/**@brief Function for initializing the Advertising functionality.
*/
static void advertising_init(void)
{
ret_code_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 = true;
init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
init.advdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
init.advdata.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)
{
ret_code_t err_code;
bsp_event_t startup_event;
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 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 Function for starting advertising.
*/
static void advertising_start(bool erase_bonds)
{
if (erase_bonds == true)
{
delete_bonds();
// Advertising is started by PM_EVT_PEERS_DELETED_SUCEEDED event
}
else
{
ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function for application main entry.
*/
int main(void)
{
bool erase_bonds;
// Initialize.
log_init();
timers_init();
buttons_leds_init(&erase_bonds);
power_management_init();
ble_stack_init();
gap_params_init();
gatt_init();
services_init();
advertising_init();
conn_params_init();
peer_manager_init();
twi_master_init();
nrf_delay_ms(100); // give some delay
init_bme();
nrf_delay_ms(100);
while(mpu6050_init() == false) // wait until MPU6050 sensor is successfully initialized
{
NRF_LOG_INFO("MPU_6050 initialization failed!!!"); // if it failed to initialize then print a message
NRF_LOG_FLUSH();
nrf_delay_ms(1000);
}
NRF_LOG_INFO("MPU6050 Init Successfully!!!");
NRF_LOG_FLUSH();
// Start execution.
NRF_LOG_INFO("Template example started.");
application_timers_start();
advertising_start(erase_bonds);
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
/**
* @}
*/
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "nrf_drv_twi.h"
#include "mpu6050.h"
#include "bme680.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
struct bme680_dev gas_sensor;
int8_t rslt = BME680_OK;
//Initializing TWI0 instance
#define TWI_INSTANCE_ID 0
// A flag to indicate the transfer state
static volatile bool m_xfer_done = false;
// Create a Handle for the twi communication
static const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(TWI_INSTANCE_ID);
//Event Handler
void twi_handler(nrf_drv_twi_evt_t const * p_event, void * p_context)
{
//Check the event to see what type of event occurred
switch (p_event->type)
{
//If data transmission or receiving is finished
case NRF_DRV_TWI_EVT_DONE:
m_xfer_done = true;//Set the flag
break;
default:
// do nothing
break;
}
}
//Initialize the TWI as Master device
void twi_master_init(void)
{
ret_code_t err_code;
// Configure the settings for twi communication
const nrf_drv_twi_config_t twi_config = {
.scl = TWI_SCL_M, //SCL Pin
.sda = TWI_SDA_M, //SDA Pin
.frequency = NRF_DRV_TWI_FREQ_400K, //Communication Speed
.interrupt_priority = APP_IRQ_PRIORITY_HIGH, //Interrupt Priority(Note: if using Bluetooth then select priority carefully)
.clear_bus_init = false //automatically clear bus
};
//A function to initialize the twi communication
err_code = nrf_drv_twi_init(&m_twi, &twi_config, twi_handler, NULL);
APP_ERROR_CHECK(err_code);
//Enable the TWI Communication
nrf_drv_twi_enable(&m_twi);
}
/*
A function to write a Single Byte to MPU6050's internal Register
*/
bool mpu6050_register_write(uint8_t register_address, uint8_t value)
{
ret_code_t err_code;
uint8_t tx_buf[MPU6050_ADDRESS_LEN+1];
//Write the register address and data into transmit buffer
tx_buf[0] = register_address;
tx_buf[1] = value;
//Set the flag to false to show the transmission is not yet completed
m_xfer_done = false;
//Transmit the data over TWI Bus
err_code = nrf_drv_twi_tx(&m_twi, MPU6050_ADDRESS, tx_buf, MPU6050_ADDRESS_LEN+1, false);
//Wait until the transmission of the data is finished
while (m_xfer_done == false)
{
}
// if there is no error then return true else return false
if (NRF_SUCCESS != err_code)
{
return false;
}
return true;
}
/*
A Function to read data from the MPU6050
*/
bool mpu6050_register_read(uint8_t register_address, uint8_t * destination, uint8_t number_of_bytes)
{
ret_code_t err_code;
//Set the flag to false to show the receiving is not yet completed
m_xfer_done = false;
// Send the Register address where we want to write the data
err_code = nrf_drv_twi_tx(&m_twi, MPU6050_ADDRESS, ®ister_address, 1, true);
//Wait for the transmission to get completed
while (m_xfer_done == false){}
// If transmission was not successful, exit the function with false as return value
if (NRF_SUCCESS != err_code)
{
return false;
}
//set the flag again so that we can read data from the MPU6050's internal register
m_xfer_done = false;
// Receive the data from the MPU6050
err_code = nrf_drv_twi_rx(&m_twi, MPU6050_ADDRESS, destination, number_of_bytes);
//wait until the transmission is completed
while (m_xfer_done == false){}
// if data was successfully read, return true else return false
if (NRF_SUCCESS != err_code)
{
return false;
}
return true;
}
/*
A Function to verify the product id
(its a basic test to check if we are communicating with the right slave, every type of I2C Device has
a special WHO_AM_I register which holds a specific value, we can read it from the MPU6050 or any device
to confirm we are communicating with the right device)
*/
bool mpu6050_verify_product_id(void)
{
uint8_t who_am_i; // create a variable to hold the who am i value
// Note: All the register addresses including WHO_AM_I are declared in
// MPU6050.h file, you can check these addresses and values from the
// datasheet of your slave device.
if (mpu6050_register_read(ADDRESS_WHO_AM_I, &who_am_i, 1))
{
if (who_am_i != MPU6050_WHO_AM_I)
{
return false;
}
else
{
return true;
}
}
else
{
return false;
}
}
/*
Function to initialize the mpu6050
*/
bool mpu6050_init(void)
{
bool transfer_succeeded = true;
//Check the id to confirm that we are communicating with the right device
transfer_succeeded &= mpu6050_verify_product_id();
if(mpu6050_verify_product_id() == false)
{
return false;
}
// Set the registers with the required values, see the datasheet to get a good idea of these values
(void)mpu6050_register_write(MPU_PWR_MGMT1_REG , 0x00);
(void)mpu6050_register_write(MPU_SAMPLE_RATE_REG , 0x07);
(void)mpu6050_register_write(MPU_CFG_REG , 0x06);
(void)mpu6050_register_write(MPU_INT_EN_REG, 0x00);
(void)mpu6050_register_write(MPU_GYRO_CFG_REG , 0x18);
(void)mpu6050_register_write(MPU_ACCEL_CFG_REG,0x00);
return transfer_succeeded;
}
/*
Read the Gyro values from the MPU6050's internal Registers
*/
bool MPU6050_ReadGyro(int16_t *pGYRO_X , int16_t *pGYRO_Y , int16_t *pGYRO_Z )
{
uint8_t buf[6];
bool ret = false;
if(mpu6050_register_read(MPU6050_GYRO_OUT, buf, 6) == true)
{
*pGYRO_X = (buf[0] << 8) | buf[1];
if(*pGYRO_X & 0x8000) *pGYRO_X-=65536;
*pGYRO_Y= (buf[2] << 8) | buf[3];
if(*pGYRO_Y & 0x8000) *pGYRO_Y-=65536;
*pGYRO_Z = (buf[4] << 8) | buf[5];
if(*pGYRO_Z & 0x8000) *pGYRO_Z-=65536;
ret = true;
}
return ret;
}
/*
A Function to read accelerometer's values from the internal registers of MPU6050
*/
bool MPU6050_ReadAcc( int16_t *pACC_X , int16_t *pACC_Y , int16_t *pACC_Z )
{
uint8_t buf[6];
bool ret = false;
if(mpu6050_register_read(MPU6050_ACC_OUT, buf, 6) == true)
{
mpu6050_register_read(MPU6050_ACC_OUT, buf, 6);
*pACC_X = (buf[0] << 8) | buf[1];
if(*pACC_X & 0x8000) *pACC_X-=65536;
*pACC_Y= (buf[2] << 8) | buf[3];
if(*pACC_Y & 0x8000) *pACC_Y-=65536;
*pACC_Z = (buf[4] << 8) | buf[5];
if(*pACC_Z & 0x8000) *pACC_Z-=65536;
ret = true;
}
return ret;
}
int8_t bme_i2c_write (uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
ret_code_t err_code;
uint8_t reg[]={reg_addr,*data};
//Set the flag to false to show the transmission is not yet completed
m_xfer_done = false;
//Transmit the data over TWI Bus
err_code = nrf_drv_twi_tx(&m_twi, dev_id, reg, len+1, false);
//Wait until the transmission of the data is finished
while (m_xfer_done == false)
{
//NRF_LOG_ERROR( "waiting for m_x_fer_done ");
//NRF_LOG_FLUSH();
}
// if there is no error then return true else return false
if (NRF_SUCCESS != err_code)
{
NRF_LOG_ERROR( "error in data transfer ");
NRF_LOG_FLUSH();
return false;
}
return 0;
}
void user_delay_ms (uint32_t period)
{
nrf_delay_ms(period);
}
int8_t bme_i2c_read (uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
ret_code_t err_code;
//Set the flag to false to show the receiving is not yet completed
m_xfer_done = false;
uint8_t tampon[30]={0};
//NRF_LOG_INFO("read : reg addr : %d",reg_addr);
//NRF_LOG_FLUSH();
int size=0, result = 0, j=0;
uint8_t reg[1]={reg_addr};
err_code = nrf_drv_twi_tx(&m_twi, dev_id, reg, 1,false);
//Wait for the transmission to get completed
while (m_xfer_done == false){}
// If transmission was not successful, exit the function with false as return value
if (NRF_SUCCESS != err_code)
{
return false;
}
//set the flag again so that we can read data from the MPU6050's internal register
m_xfer_done = false;
// Receive the data from the bme680
err_code = nrf_drv_twi_rx(&m_twi, dev_id, tampon, len);
//wait until the transmission is completed
while (m_xfer_done == false){}
// if data was successfully read, return true else return false
if (NRF_SUCCESS != err_code)
{
return false;
}
//NRF_LOG_INFO("read : len %d :",len);
//NRF_LOG_FLUSH();
if(err_code==0){
size=1;
for(int i = 0 ;i<30;i++)
{
if(tampon[i]!=0) size=i+1;
}
}
else size=0;
if(size ==15 ) size=len;
//NRF_LOG_INFO("read : wire.available %d :",size);
// NRF_LOG_FLUSH();
if(len<=size)
{
for (int i=0;i<len;i++)
{
data[i]=tampon[i];
//NRF_LOG_INFO("%d",data[i]);
//NRF_LOG_FLUSH();
}
}
else{
result=5;
}
return result;
}
void init_bme (void)
{
gas_sensor.dev_id = BME680_I2C_ADDR_PRIMARY;
gas_sensor.intf = BME680_I2C_INTF;
gas_sensor.read = bme_i2c_read;
gas_sensor.write = bme_i2c_write;
gas_sensor.delay_ms = user_delay_ms;
gas_sensor.amb_temp = 25;
rslt = bme680_init(&gas_sensor);
uint8_t set_required_settings;
/* Set the temperature, pressure and humidity settings */
gas_sensor.tph_sett.os_hum = BME680_OS_2X;
gas_sensor.tph_sett.os_pres = BME680_OS_4X;
gas_sensor.tph_sett.os_temp = BME680_OS_8X;
gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3;
/* Set the remaining gas sensor settings and link the heating profile */
gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
/* Create a ramp heat waveform in 3 steps */
gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */
gas_sensor.gas_sett.heatr_dur = 150; /* milliseconds */
/* Select the power mode */
/* Must be set before writing the sensor configuration */
gas_sensor.power_mode = BME680_FORCED_MODE;
/* Set the required sensor settings needed */
set_required_settings = BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL | BME680_FILTER_SEL
| BME680_GAS_SENSOR_SEL;
/* Set the desired sensor configuration */
rslt = bme680_set_sensor_settings(set_required_settings,&gas_sensor);
/* Set the power mode */
rslt = bme680_set_sensor_mode(&gas_sensor);
NRF_LOG_INFO("chip_id : %x :",gas_sensor.chip_id);
NRF_LOG_FLUSH();
uint8_t data[1]={140};
uint8_t reg[1]={0x74};
uint8_t rega[1]={0x72};
uint8_t regs[1]={0x73};
bme680_set_regs(reg, data, 1, &gas_sensor);
bme680_set_regs(rega, data, 1, &gas_sensor);
bme680_set_regs(regs, data, 1, &gas_sensor);
nrf_delay_ms(500);
NRF_LOG_FLUSH();
}
void getsensordata(void){
uint16_t meas_period;
bme680_get_profile_dur(&meas_period, &gas_sensor);
struct bme680_field_data data;
nrf_delay_ms(meas_period);
rslt = bme680_get_sensor_data(&data, &gas_sensor);
NRF_LOG_FLUSH();
nrf_delay_ms(1);
NRF_LOG_FLUSH();
NRF_LOG_ERROR( "TEMPERATURE : " NRF_LOG_FLOAT_MARKER "\r\n", NRF_LOG_FLOAT(data.temperature /100.0));
NRF_LOG_FLUSH();
nrf_delay_ms(1);
NRF_LOG_ERROR( "PRESSURE : " NRF_LOG_FLOAT_MARKER "\r\n", NRF_LOG_FLOAT(data.pressure/1000.0));
NRF_LOG_FLUSH();
nrf_delay_ms(1);
NRF_LOG_ERROR( "HUMIDITY: " NRF_LOG_FLOAT_MARKER "\r\n", NRF_LOG_FLOAT(data.humidity /1000.0));
NRF_LOG_FLUSH();
nrf_delay_ms(1);
if (gas_sensor.power_mode == BME680_FORCED_MODE)
{
rslt = bme680_set_sensor_mode(&gas_sensor);
}
}
