SDK v15.2.0 using code from the peripheral spi example. Linux Ubuntu 19.04, uploading to nRF52 DK.
When I call my get_bma253_accel_data in main, I get a continuous stream of data as expected
// Enter main loop.
for (;;)
{
UNUSED_PARAMETER(get_bma253_accel_data(&accel));
NRF_LOG_INFO("accel -- x: %d, y: %d, z: %d", accel.x, accel.y, accel.z);
idle_state_handle();
}
When I use an app timer to call get_bma253_accel_data (Line 301)
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*
* 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
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* 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
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/** @file
*
* @defgroup ble_sdk_app_hts_main main.c
* @{
* @ingroup ble_sdk_app_hts
* @brief Health Thermometer Service Sample Application main file.
*
* This file contains the source code for a sample application using the Health Thermometer service
* It also includes the sample code for Battery and Device Information services.
* This application uses the @ref srvlib_conn_params module.
*/
#include "stdint.h"
#include "string.h"
#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "ble.h"
#include "ble_err.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_advertising.h"
#include "ble_bas.h"
#include "ble_hts_custom.h"
#include "ble_dis.h"
#include "ble_conn_params.h"
#include "sensorsim.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "app_timer.h"
#include "peer_manager.h"
#include "peer_manager_handler.h"
#include "bsp_btn_ble.h"
#include "fds.h"
#include "ble_conn_state.h"
#include "nrf_ble_gatt.h"
#include "nrf_ble_qwr.h"
#include "nrf_pwr_mgmt.h"
#include "config.h"
#include "battery.h"
#include "ble_nus.h"
#include "tension.h"
#include "temperature.h"
#include "nrf_drv_saadc.h"
#include "stdlib.h"
#include "accelerometer.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#define DEVICE_NAME "Nordic_HTS" /**< Name of device. Will be included in the advertising data. */
#define MANUFACTURER_NAME "NordicSemiconductor" /**< Manufacturer. Will be passed to Device Information Service. */
#define MODEL_NUM "NS-HTS-EXAMPLE" /**< Model number. Will be passed to Device Information Service. */
#define MANUFACTURER_ID 0x1122334455 /**< Manufacturer ID, part of System ID. Will be passed to Device Information Service. */
#define ORG_UNIQUE_ID 0x667788 /**< Organizational Unique ID, part of System ID. Will be passed to Device Information Service. */
#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 APP_ADV_INTERVAL 40 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 25 ms). */
#define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */
#define BATTERY_LEVEL_MEAS_INTERVAL APP_TIMER_TICKS(2000) /**< Battery level measurement interval (ticks). */
#define MIN_BATTERY_LEVEL 81 /**< Minimum battery level as returned by the simulated measurement function. */
#define MAX_BATTERY_LEVEL 100 /**< Maximum battery level as returned by the simulated measurement function. */
#define BATTERY_LEVEL_INCREMENT 1 /**< Value by which the battery level is incremented/decremented for each call to the simulated measurement function. */
#define TEMP_TYPE_AS_CHARACTERISTIC 0 /**< Determines if temperature type is given as characteristic (1) or as a field of measurement (0). */
#define MIN_CELCIUS_DEGREES 3688 /**< Minimum temperature in celcius for use in the simulated measurement function (multiplied by 100 to avoid floating point arithmetic). */
#define MAX_CELCIUS_DEGRESS 3972 /**< Maximum temperature in celcius for use in the simulated measurement function (multiplied by 100 to avoid floating point arithmetic). */
#define CELCIUS_DEGREES_INCREMENT 36 /**< Value by which temperature is incremented/decremented for each call to the simulated measurement function (multiplied by 100 to avoid floating point arithmetic). */
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(50, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.5 seconds) */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Maximum acceptable connection interval (1 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 indication) 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 SEC_PARAM_BOND 0 /**< 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 ADC_REF_VOLTAGE_IN_MILLIVOLTS 600 //!< Reference voltage (in milli volts) used by ADC while doing conversion.
#define DIODE_FWD_VOLT_DROP_MILLIVOLTS 270 //!< Typical forward voltage drop of the diode (Part no: SD103ATW-7-F) that is connected in series with the voltage supply. This is the voltage drop when the forward current is 1mA. Source: Data sheet of 'SURFACE MOUNT SCHOTTKY BARRIER DIODE ARRAY' available at www.diodes.com.
#define ADC_RES_10BIT 1024 //!< Maximum digital value for 10-bit ADC conversion.
#define ADC_PRE_SCALING_COMPENSATION 6 //!< The ADC is configured to use VDD with 1/3 prescaling as input. And hence the result of conversion is to be multiplied by 3 to get the actual value of the battery voltage.
#define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE) \
((((ADC_VALUE)*ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION)
#define MILLIVOLTS_TO_PERCENT(ADC_VALUE) (ADC_VALUE * 100 / PEAK_BATTERY_VOLTAGE_MV)
APP_TIMER_DEF(m_hts_timer_id); // Health thermometer service timer
APP_TIMER_DEF(m_tension_timer_id); // Tension timer
BLE_NUS_DEF(m_nus, 1); // Nordic UART Service structure
APP_TIMER_DEF(m_battery_timer_id); /**< Battery timer. */
BLE_BAS_DEF(m_bas); /**< Structure used to identify the battery service. */
BLE_HTS_DEF_CUSTOM(m_hts); /**< Structure used to identify the health thermometer service. */
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. */
static struct bma2x2_accel_data accel = {0, 0, 0};
static sensorsim_cfg_t m_tension_sim_cfg; // Tension sensor simulator configuration
static sensorsim_state_t m_tension_sim_state; // Tension sensor simulator state
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;
static bool m_hts_meas_ind_conf_pending = false; /**< Flag to keep track of when an indication confirmation is pending. */
static sensorsim_cfg_t m_battery_sim_cfg; /**< Battery Level sensor simulator configuration. */
static sensorsim_state_t m_battery_sim_state; /**< Battery Level sensor simulator state. */
static sensorsim_cfg_t m_temp_celcius_sim_cfg; /**< Temperature simulator configuration. */
static sensorsim_state_t m_temp_celcius_sim_state; /**< Temperature simulator state. */
/* Not enough bytes left for us to include the NUS service in
the adv packet; once we connect the NUS is visible. */
static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifiers. */
{
{BLE_UUID_HEALTH_THERMOMETER_SERVICE, BLE_UUID_TYPE_BLE},
{BLE_UUID_BATTERY_SERVICE, BLE_UUID_TYPE_BLE},
{BLE_UUID_DEVICE_INFORMATION_SERVICE, BLE_UUID_TYPE_BLE}};
static void advertising_start(bool erase_bonds);
static void temperature_measurement_send(void);
static void hts_sim_measurement(ble_hts_meas_t *p_meas);
/**@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;
bool is_indication_enabled;
pm_handler_on_pm_evt(p_evt);
pm_handler_flash_clean(p_evt);
switch (p_evt->evt_id)
{
case PM_EVT_CONN_SEC_SUCCEEDED:
// Send a single temperature measurement if indication is enabled.
// NOTE: For this to work, make sure ble_hts_on_ble_evt() is called before
// pm_evt_handler() in ble_evt_dispatch().
err_code = ble_hts_is_indication_enabled(&m_hts, &is_indication_enabled);
APP_ERROR_CHECK(err_code);
if (is_indication_enabled)
{
temperature_measurement_send();
}
break;
case PM_EVT_PEERS_DELETE_SUCCEEDED:
advertising_start(false);
break;
default:
break;
}
}
static void TensionLevelUpdate(void)
{
ret_code_t err_code;
uint32_t tension_level;
// largest value to be sent is 2^23 = 8388608, which is 7 bytes. Add one for EOL character
static uint32_t max_n_digits = 8;
uint8_t tension[max_n_digits];
uint16_t len;
if (simEnabled)
{
tension_level = sensorsim_measure(&m_tension_sim_state, &m_tension_sim_cfg);
len = uint32_encode(tension_level, tension);
NRF_LOG_INFO("Sending tension measurement: %d", *tension);
err_code = ble_nus_data_send(&m_nus, tension, &len, m_conn_handle);
if (err_code != NRF_ERROR_INVALID_STATE) // TODO: remove this quick fix (used in other send functions too)
{
APP_ERROR_CHECK(err_code);
}
}
else
{
if (Hx711SampleConvert(&tension_level) == NRFX_SUCCESS)
{
len = (uint16_t) max_n_digits;
itoa(tension_level, tension, 10);
NRF_LOG_INFO("Sending tension measurement: %d of length: %d", tension_level, len);
err_code = ble_nus_data_send(&m_nus, tension, &len, m_conn_handle);
if (err_code != NRF_ERROR_INVALID_STATE) // TODO: remove this quick fix (used in other send functions too)
{
APP_ERROR_CHECK(err_code);
}
}
}
}
/**@brief Function for performing a battery measurement, and update the Battery Level characteristic in the Battery Service.
*/
static void battery_level_update(void)
{
ret_code_t err_code;
nrf_saadc_value_t battery_level;
if (simEnabled)
{
battery_level = (nrf_saadc_value_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);
}
else
{
/* nrfx_saadc_sample_convert will put a value between 0-1023 in battery_level */
err_code = nrfx_saadc_sample_convert(NRF_SAADC_INPUT_VDD, &battery_level);
APP_ERROR_CHECK(err_code);
/* ADC_RESULTS_IN_MILLI_VOLTS will return a value between 0-3600. Evidently, the value in
battery_level should not be larger than the actual possible voltage of your battery */
battery_level = ADC_RESULT_IN_MILLI_VOLTS(battery_level) + DIODE_FWD_VOLT_DROP_MILLIVOLTS;
battery_level = MILLIVOLTS_TO_PERCENT(battery_level);
}
NRF_LOG_INFO("Sending battery measurement: %d", battery_level);
err_code = ble_bas_battery_level_update(&m_bas, (uint8_t)battery_level, m_conn_handle);
if ((err_code != NRF_SUCCESS) &&
(err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != NRF_ERROR_BUSY) &&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING))
{
APP_ERROR_HANDLER(err_code);
}
UNUSED_PARAMETER(get_bma253_accel_data(&accel));
}
/**@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 battery_level_meas_timeout_handler(void *p_context)
{
UNUSED_PARAMETER(p_context);
battery_level_update();
}
static void tension_timer_timeout_handler(void *p_context)
{
UNUSED_PARAMETER(p_context);
TensionLevelUpdate();
}
static void hts_timer_timeout_handler(void *p_context)
{
UNUSED_PARAMETER(p_context);
temperature_measurement_send();
}
/**@brief Function for populating simulated health thermometer measurement.
*/
static void hts_sim_measurement(ble_hts_meas_t *p_meas)
{
static ble_date_time_t time_stamp = {2012, 12, 5, 11, 50, 0};
uint32_t celciusX100;
p_meas->temp_in_fahr_units = false;
p_meas->time_stamp_present = true;
p_meas->temp_type_present = (TEMP_TYPE_AS_CHARACTERISTIC ? false : true);
celciusX100 = sensorsim_measure(&m_temp_celcius_sim_state, &m_temp_celcius_sim_cfg);
p_meas->temp_in_celcius.exponent = -2;
p_meas->temp_in_celcius.mantissa = celciusX100;
p_meas->temp_in_fahr.exponent = -2;
p_meas->temp_in_fahr.mantissa = (32 * 100) + ((celciusX100 * 9) / 5);
p_meas->time_stamp = time_stamp;
p_meas->temp_type = BLE_HTS_TEMP_TYPE_FINGER;
// update simulated time stamp
time_stamp.seconds += 27;
if (time_stamp.seconds > 59)
{
time_stamp.seconds -= 60;
time_stamp.minutes++;
if (time_stamp.minutes > 59)
{
time_stamp.minutes = 0;
}
}
}
/**@brief Function for the Timer initialization.
*
* @details Initializes the timer module. This creates and starts application timers.
*/
static void timers_init(void)
{
ret_code_t err_code;
// Initialize timer module.
err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
// Create timers.
err_code = app_timer_create(&m_battery_timer_id,
APP_TIMER_MODE_REPEATED,
battery_level_meas_timeout_handler);
APP_ERROR_CHECK(err_code);
err_code = app_timer_create(&m_tension_timer_id,
APP_TIMER_MODE_REPEATED,
tension_timer_timeout_handler);
APP_ERROR_CHECK(err_code);
err_code = app_timer_create(&m_hts_timer_id,
APP_TIMER_MODE_REPEATED,
hts_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);
err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_THERMOMETER);
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 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 module.
*/
static void gatt_init(void)
{
ret_code_t err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for simulating and sending one Temperature Measurement.
*/
static void temperature_measurement_send(void)
{
ble_hts_meas_t temperature_meas;
ret_code_t err_code;
if (simEnabled)
{
hts_sim_measurement(&temperature_meas);
}
else
{
ReadTemperature(&temperature_meas);
}
/* For logging instead of including the entire math library I just assume .exponent = -2 (ie mantissa x 0.01)*/
NRF_LOG_INFO("Sending temperature measurement: %d", temperature_meas.temp_in_celcius.mantissa * 0.01);
err_code = ble_hts_measurement_send_custom(&m_hts, &temperature_meas);
switch (err_code)
{
case NRF_SUCCESS:
// Measurement was successfully sent, wait for confirmation.
m_hts_meas_ind_conf_pending = true;
break;
case NRF_ERROR_INVALID_STATE:
// Ignore error.
break;
default:
APP_ERROR_HANDLER(err_code);
break;
}
}
/**@brief Function for handling the Health Thermometer Service events.
*
* @details This function will be called for all Health Thermometer Service events which are passed
* to the application.
*
* @param[in] p_hts Health Thermometer Service structure.
* @param[in] p_evt Event received from the Health Thermometer Service.
*/
static void on_hts_evt(ble_hts_t *p_hts, ble_hts_evt_t *p_evt)
{
switch (p_evt->evt_type)
{
case BLE_HTS_EVT_INDICATION_ENABLED:
// Indication has been enabled, send a single temperature measurement
temperature_measurement_send();
break;
case BLE_HTS_EVT_INDICATION_CONFIRMED:
m_hts_meas_ind_conf_pending = false;
break;
default:
// No implementation needed.
break;
}
}
/**@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 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)
{
}
}
/**@snippet [Handling the data received over BLE] */
/**@brief Function for initializing services that will be used by the application.
*
* @details Initialize the Health Thermometer, Battery and Device Information services.
*/
static void services_init(void)
{
ret_code_t err_code;
ble_hts_init_t hts_init;
ble_bas_init_t bas_init;
ble_dis_init_t dis_init;
nrf_ble_qwr_init_t qwr_init = {0};
ble_dis_sys_id_t sys_id;
ble_nus_init_t nus_init;
// 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 Health Thermometer Service
memset(&hts_init, 0, sizeof(hts_init));
hts_init.evt_handler = on_hts_evt;
hts_init.temp_type_as_characteristic = TEMP_TYPE_AS_CHARACTERISTIC;
hts_init.temp_type = BLE_HTS_TEMP_TYPE_BODY;
// Here the sec level for the Health Thermometer Service can be changed/increased.
hts_init.ht_meas_cccd_wr_sec = SEC_JUST_WORKS;
hts_init.ht_type_rd_sec = SEC_OPEN;
err_code = ble_hts_init(&m_hts, &hts_init);
APP_ERROR_CHECK(err_code);
// Initialize Battery Service.
memset(&bas_init, 0, sizeof(bas_init));
// Here the sec level for the Battery Service can be changed/increased.
bas_init.bl_rd_sec = SEC_OPEN;
bas_init.bl_cccd_wr_sec = SEC_OPEN;
bas_init.bl_report_rd_sec = SEC_OPEN;
bas_init.evt_handler = NULL;
bas_init.support_notification = true;
bas_init.p_report_ref = NULL;
bas_init.initial_batt_level = 100;
err_code = ble_bas_init(&m_bas, &bas_init);
APP_ERROR_CHECK(err_code);
// Initialize Device Information Service.
memset(&dis_init, 0, sizeof(dis_init));
ble_srv_ascii_to_utf8(&dis_init.manufact_name_str, MANUFACTURER_NAME);
ble_srv_ascii_to_utf8(&dis_init.model_num_str, MODEL_NUM);
sys_id.manufacturer_id = MANUFACTURER_ID;
sys_id.organizationally_unique_id = ORG_UNIQUE_ID;
dis_init.p_sys_id = &sys_id;
dis_init.dis_char_rd_sec = SEC_OPEN;
err_code = ble_dis_init(&dis_init);
APP_ERROR_CHECK(err_code);
// Initialise Nordic UART Service.
memset(&nus_init, 0, sizeof(nus_init));
/* For received data, which we don't care about right now */
nus_init.data_handler = nus_data_handler;
err_code = ble_nus_init(&m_nus, &nus_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the sensor simulators.
*/
static void sensor_simulator_init(void)
{
m_tension_sim_cfg.min = 5000;
m_tension_sim_cfg.max = 30000;
m_tension_sim_cfg.incr = 1000;
m_tension_sim_cfg.start_at_max = true;
sensorsim_init(&m_tension_sim_state, &m_tension_sim_cfg);
m_battery_sim_cfg.min = MIN_BATTERY_LEVEL;
m_battery_sim_cfg.max = MAX_BATTERY_LEVEL;
m_battery_sim_cfg.incr = BATTERY_LEVEL_INCREMENT;
m_battery_sim_cfg.start_at_max = true;
sensorsim_init(&m_battery_sim_state, &m_battery_sim_cfg);
// Temperature is in celcius (it is multiplied by 100 to avoid floating point arithmetic).
m_temp_celcius_sim_cfg.min = MIN_CELCIUS_DEGREES;
m_temp_celcius_sim_cfg.max = MAX_CELCIUS_DEGRESS;
m_temp_celcius_sim_cfg.incr = CELCIUS_DEGREES_INCREMENT;
m_temp_celcius_sim_cfg.start_at_max = false;
sensorsim_init(&m_temp_celcius_sim_state, &m_temp_celcius_sim_cfg);
}
/**@brief Function for starting application timers.
*/
static void application_timers_start(void)
{
ret_code_t err_code;
// Start application timers.
err_code = app_timer_start(m_battery_timer_id, BATTERY_LEVEL_MEAS_INTERVAL, NULL);
APP_ERROR_CHECK(err_code);
err_code = app_timer_start(m_tension_timer_id, APP_TIMER_TICKS(2000), NULL);
APP_ERROR_CHECK(err_code);
err_code = app_timer_start(m_hts_timer_id, APP_TIMER_TICKS(2000), NULL);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for stopping application timers.
*/
static void application_timers_stop(void)
{
ret_code_t err_code;
// Start application timers.
err_code = app_timer_stop(m_battery_timer_id);
APP_ERROR_CHECK(err_code);
err_code = app_timer_stop(m_tension_timer_id);
APP_ERROR_CHECK(err_code);
err_code = app_timer_stop(m_hts_timer_id);
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 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)
{
uint32_t err_code = NRF_SUCCESS;
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);
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
APP_ERROR_CHECK(err_code);
application_timers_start();
break;
case BLE_GAP_EVT_DISCONNECTED:
NRF_LOG_INFO("Disconnected.");
m_conn_handle = BLE_CONN_HANDLE_INVALID;
m_hts_meas_ind_conf_pending = false;
application_timers_stop();
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;
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;
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 handling events from the BSP module.
*
* @param[in] event Event generated by button press.
*/
static void bsp_event_handler(bsp_event_t event)
{
ret_code_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;
case BSP_EVENT_KEY_0:
if (m_conn_handle != BLE_CONN_HANDLE_INVALID)
{
temperature_measurement_send();
}
break;
default:
break;
}
}
/**@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 = 0;
sec_param.kdist_own.id = 0;
sec_param.kdist_peer.enc = 0;
sec_param.kdist_peer.id = 0;
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 initializing the Advertising functionality.
*
* @details Encodes the required advertising data and passes it to the stack.
* Also builds a structure to be passed to the stack when starting advertising.
*/
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_DELETE_SUCCEEDED event.
}
else
{
uint32_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();
sensor_simulator_init();
conn_params_init();
peer_manager_init();
BatteryADCInit();
Hx711Init(INPUT_CH_A_128);
bma_spi_init();
if (debugEnabled)
{
NRF_LOG_INFO("This is a debug build!!");
}
if (simEnabled)
{
NRF_LOG_INFO("This is a simulated build!!");
}
// Start execution.
NRF_LOG_INFO("Health Thermometer example started.");
advertising_start(erase_bonds);
// Enter main loop.
for (;;)
{
NRF_LOG_INFO("accel -- x: %d, y: %d, z: %d", accel.x, accel.y, accel.z);
idle_state_handle();
}
}
/**
* @}
*/
I get the following error (upon connection via nRFConnect):
<error> app: ERROR 17 [NRF_ERROR_BUSY] at ../../../Src/accelerometer.c:92
PC at: 0x00027717
Here's my accelerometer .c file
#include "accelerometer.h"
#include "bma2x2.h"
#include "nrf_drv_spi.h"
#include "nrf_delay.h"
#define SPI_INSTANCE 0
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE);
struct bma2x2_t bma2x2;
static volatile bool spi_xfer_done = false;
#define BMA2x2_SPI_BUS_WRITE_CONTROL_BYTE 0x7F
#define BMA2x2_SPI_BUS_READ_CONTROL_BYTE 0x80
#ifdef DEVKIT
#define BMA_SPI_SS_PIN 19
#define BMA_SPI_MISO_PIN 23
#define BMA_SPI_MOSI_PIN 22
#define BMA_SPI_SCK_PIN 20
#else
#define BMA_SPI_SS_PIN 17
#define BMA_SPI_MISO_PIN 8
#define BMA_SPI_MOSI_PIN 6
#define BMA_SPI_SCK_PIN 15
#endif
void spi_event_handler(nrf_drv_spi_evt_t const * p_event,
void * p_context)
{
spi_xfer_done = true;
}
void bma_spi_init()
{
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.ss_pin = BMA_SPI_SS_PIN;
spi_config.miso_pin = BMA_SPI_MISO_PIN;
spi_config.mosi_pin = BMA_SPI_MOSI_PIN;
spi_config.sck_pin = BMA_SPI_SCK_PIN;
spi_config.mode = NRF_DRV_SPI_MODE_3;
spi_config.bit_order = NRF_SPI_BIT_ORDER_MSB_FIRST;
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
bma2x2.chip_id = BMA2x2_INIT_VALUE;
bma2x2.bus_write = &bma_spi_write;
bma2x2.bus_read = &bma_spi_read;
bma2x2.delay_msec = &spi_delay;
BMA_ERROR_CHECK(bma2x2_init(&bma2x2));
if (bma2x2.chip_id == 0xFA)
{
NRF_LOG_INFO("BMA initialised.");
}
else
{
NRF_LOG_INFO("BMA initialisation failed. Received chip id: %x", bma2x2.chip_id);
}
}
s8 bma_spi_write(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt)
{
s8 error = NO_ERROR;
uint8_t tx_buf[cnt+1];
// place write bit + address in first byte
tx_buf[0] = (reg_addr++) & BMA2x2_SPI_BUS_WRITE_CONTROL_BYTE;
for (uint8_t string_pos = 1; string_pos < cnt+1; string_pos++)
{
// place data in second byte
tx_buf[string_pos] = *(reg_data + string_pos - 1);
}
spi_xfer_done = false;
error = (s8) nrf_drv_spi_transfer(&spi, tx_buf, cnt+1, NULL, 0);
BMA_ERROR_CHECK(error);
nrf_delay_us(100);
return error;
}
s8 bma_spi_read(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt)
{
s8 error = NO_ERROR;
uint8_t tx_buf[1] = {reg_addr|BMA2x2_SPI_BUS_READ_CONTROL_BYTE};
u8 array[cnt+1];
spi_xfer_done = false;
error = (s8) nrf_drv_spi_transfer(&spi, tx_buf, 1, array, cnt+1);
BMA_ERROR_CHECK(error);
nrf_delay_us(100);
for (uint32_t i=0; i < cnt; i++)
{
*(reg_data + i) = array[i+1];
}
return error;
}
void spi_delay(u32 millis_time)
{
nrf_delay_ms(millis_time);
}
s32 bma2x2_data_readout()
{
/*Local variables for reading accel x, y and z data*/
s16 accel_x_s16, accel_y_s16, accel_z_s16 = BMA2x2_INIT_VALUE;
/* Local variable used to assign the bandwidth value*/
u8 bw_value_u8 = BMA2x2_INIT_VALUE;
/* Local variable used to set the bandwidth value*/
u8 banwid = BMA2x2_INIT_VALUE;
/* status of communication*/
s32 com_rslt = NO_ERROR;
com_rslt += bma2x2_set_power_mode(BMA2x2_MODE_NORMAL);
bw_value_u8 = 0x08;/* set bandwidth of 7.81Hz*/
com_rslt += bma2x2_set_bw(bw_value_u8);
/* This API used to read back the written value of bandwidth*/
com_rslt += bma2x2_get_bw(&banwid);
/* Read the accel X data*/
com_rslt += bma2x2_read_accel_x(&accel_x_s16);
/* Read the accel Y data*/
com_rslt += bma2x2_read_accel_y(&accel_y_s16);
/* Read the accel Z data*/
com_rslt += bma2x2_read_accel_z(&accel_z_s16);
NRF_LOG_INFO("accel -- x: %d, y: %d, z: %d", accel_x_s16, accel_y_s16, accel_y_s16);
com_rslt += bma2x2_set_power_mode(BMA2x2_MODE_DEEP_SUSPEND);
BMA_ERROR_CHECK(com_rslt);
return com_rslt;
}
s32 get_bma253_accel_data(struct bma2x2_accel_data *accel)
{
s32 com_rslt = NO_ERROR;
com_rslt = bma2x2_read_accel_x(&(accel->x));
com_rslt = bma2x2_read_accel_y(&(accel->y));
com_rslt = bma2x2_read_accel_z(&(accel->z));
BMA_ERROR_CHECK(com_rslt);
return com_rslt;
}
I thought it might have something to do with the spi_xfer_done flag, but I'm having a hard time debugging. Can someone point me in the right direction? Here's one similar question
Here's what the output looks like
<info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: accel -- x: 0, y: 0, z: 0 <info> app: Sending temperature measurement: 25 <info> app: Sending battery measurement: 105 <error> app: ERROR 17 [NRF_ERROR_BUSY] at ../../../Src/accelerometer.c:92 PC at: 0x00027717 <error> app: End of error report
Lastly, I'm using the BMA2x2 driver. The .h/.c files can be found here
