Hi everyone,
I modified example code ble_apps_bps and introduced a GPIO interrupt, I want to sniff I2c communication (bit banging) but my ISR is triggered with a very long latency.
For experimentation I am trying to sniff just only SCL line, when I receive it I am setting-resetting another pin. So, you can see the delay from here ==> Logic Analyzer Output
Please help me, I spend more than 2 weeks but there is no result 
void in_pin_scl_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
nrf_drv_gpiote_out_set(PIN_OUT);
nrf_drv_gpiote_out_clear(PIN_OUT);
}
static void my_gpio_init(void)
{
ret_code_t err_code;
nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_LOTOHI(true);
in_config.pull = NRF_GPIO_PIN_PULLUP;
err_code = nrf_drv_gpiote_in_init(PIN_SCL, &in_config, in_pin_scl_handler);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_event_enable(PIN_SCL, true);
nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(true);
err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
APP_ERROR_CHECK(err_code);
}
int main(void)
{
bool erase_bonds;
// Initialize.
log_init();
timers_init();
buttons_leds_init(&erase_bonds);
my_gpio_init();
power_management_init();
ble_stack_init();
gap_params_init();
gatt_init();
advertising_init();
services_init();
sensor_simulator_init();
conn_params_init();
peer_manager_init();
// Start execution.
NRF_LOG_INFO("Blood Pressure example started.");
application_timers_start();
advertising_start(erase_bonds);
// Enter main loop.
for (;;)
{
idle_state_handle();
}
}
Full Source Code main.c :
#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_bps.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 "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "nrf_drv_gpiote.h"
#define DEVICE_NAME "Nordic_BPS" /**< 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-BPS-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 NUM_SIM_MEAS_VALUES 4 /**< Number of simulated measurements to cycle through. */
#define SIM_MEAS_1_SYSTOLIC 117 /**< Simulated measurement value for systolic pressure. */
#define SIM_MEAS_1_DIASTOLIC 76 /**< Simulated measurement value for diastolic pressure. */
#define SIM_MEAS_1_MEAN_AP 103 /**< Simulated measurement value for mean arterial pressure. */
#define SIM_MEAS_1_PULSE_RATE 60 /**< Simulated measurement value for pulse rate. */
#define SIM_MEAS_2_SYSTOLIC 121 /**< Simulated measurement value for systolic pressure. */
#define SIM_MEAS_2_DIASTOLIC 81 /**< Simulated measurement value for diastolic pressure. */
#define SIM_MEAS_2_MEAN_AP 106 /**< Simulated measurement value for mean arterial pressure. */
#define SIM_MEAS_2_PULSE_RATE 72 /**< Simulated measurement value for pulse rate. */
#define SIM_MEAS_3_SYSTOLIC 138 /**< Simulated measurement value for systolic pressure. */
#define SIM_MEAS_3_DIASTOLIC 88 /**< Simulated measurement value for diastolic pressure. */
#define SIM_MEAS_3_MEAN_AP 120 /**< Simulated measurement value for mean arterial pressure. */
#define SIM_MEAS_3_PULSE_RATE 105 /**< Simulated measurement value for pulse rate. */
#define SIM_MEAS_4_SYSTOLIC 145 /**< Simulated measurement value for systolic pressure. */
#define SIM_MEAS_4_DIASTOLIC 100 /**< Simulated measurement value for diastolic pressure. */
#define SIM_MEAS_4_MEAN_AP 131 /**< Simulated measurement value for mean arterial pressure. */
#define SIM_MEAS_4_PULSE_RATE 125 /**< Simulated measurement value for pulse rate. */
#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 MIN_CONN_INTERVAL MSEC_TO_UNITS(500, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(1000, 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 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 PIN_SDA 25
#define PIN_SCL 26
#define PIN_OUT 27
#define SIZE_OF_BUFFER 2048 // Maximum size of buffer
volatile unsigned char circularBuffer[SIZE_OF_BUFFER] = { 0 }; // Empty circular buffer
volatile int readIndex = 0; // Index of the read pointer
volatile int writeIndex = 0; // Index of the write pointer
volatile int bufferLength = 0; // Number of values in circular buffer
/**@brief Structure for a simulated blood pressure measurment. An instance of this struct is
filled out before sending a notification to the peer with ble_bps_measurement_send.
*/
typedef struct
{
ieee_float16_t systolic;
ieee_float16_t diastolic;
ieee_float16_t mean_arterial;
ieee_float16_t pulse_rate;
} bps_meas_sim_value_t;
APP_TIMER_DEF(m_battery_timer_id); /**< Battery timer. */
BLE_BAS_DEF(m_bas); /**< Structure used to identify the battery service. */
BLE_BPS_DEF(m_bps); /**< Structure used to identify the blood pressure 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. */
NRF_BLE_GQ_DEF(m_ble_gatt_queue, /**< BLE GATT Queue instance. */
NRF_SDH_BLE_PERIPHERAL_LINK_COUNT,
NRF_BLE_GQ_QUEUE_SIZE);
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
static bps_meas_sim_value_t m_bps_meas_sim_val[NUM_SIM_MEAS_VALUES]; /**< Blood Pressure simulated measurements. */
static bool m_bps_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 ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifiers. */
{
{BLE_UUID_BLOOD_PRESSURE_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 blood_pressure_measurement_send(void);
/**@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 Service 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 service_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
/**@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 blood pressure measurement if indication is enabled.
// NOTE: For this to work, make sure ble_bps_on_ble_evt() is called before
// ble_bondmngr_on_ble_evt() in ble_evt_dispatch().
err_code = ble_bps_is_indication_enabled(&m_bps, &is_indication_enabled);
APP_ERROR_CHECK(err_code);
if (is_indication_enabled)
{
blood_pressure_measurement_send();
}
break;
case PM_EVT_PEERS_DELETE_SUCCEEDED:
advertising_start(false);
break;
default:
break;
}
}
/**@brief Function for performing battery measurement and updating the Battery Level characteristic
* in Battery Service.
*/
static void battery_level_update(void)
{
ret_code_t err_code;
uint8_t battery_level;
battery_level = (uint8_t)sensorsim_measure(&m_battery_sim_state, &m_battery_sim_cfg);
err_code = ble_bas_battery_level_update(&m_bas, battery_level, BLE_CONN_HANDLE_ALL);
if ((err_code != NRF_SUCCESS) &&
(err_code != NRF_ERROR_INVALID_STATE) &&
(err_code != NRF_ERROR_RESOURCES) &&
(err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING)
)
{
APP_ERROR_HANDLER(err_code);
}
}
/**@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();
}
/**@brief Function for populating simulated blood pressure measurements.
*/
static void bps_sim_measurement(ble_bps_meas_t * p_meas)
{
static ble_date_time_t s_time_stamp = { 2012, 12, 5, 11, 05, 03 };
static uint8_t s_ndx = 0;
p_meas->blood_pressure_units_in_kpa = false;
p_meas->time_stamp_present = (s_ndx == 0) || (s_ndx == 2);
p_meas->pulse_rate_present = (s_ndx == 0) || (s_ndx == 1);
p_meas->user_id_present = false;
p_meas->measurement_status_present = false;
p_meas->blood_pressure_systolic.mantissa = m_bps_meas_sim_val[s_ndx].systolic.mantissa;
p_meas->blood_pressure_systolic.exponent = m_bps_meas_sim_val[s_ndx].systolic.exponent;
p_meas->blood_pressure_diastolic.mantissa = m_bps_meas_sim_val[s_ndx].diastolic.mantissa;
p_meas->blood_pressure_diastolic.exponent = m_bps_meas_sim_val[s_ndx].diastolic.exponent;
p_meas->mean_arterial_pressure.mantissa = m_bps_meas_sim_val[s_ndx].mean_arterial.mantissa;
p_meas->mean_arterial_pressure.exponent = m_bps_meas_sim_val[s_ndx].mean_arterial.exponent;
p_meas->time_stamp = s_time_stamp;
p_meas->pulse_rate.mantissa = m_bps_meas_sim_val[s_ndx].pulse_rate.mantissa;
p_meas->pulse_rate.exponent = m_bps_meas_sim_val[s_ndx].pulse_rate.exponent;
// Update index to simulated measurements.
s_ndx++;
if (s_ndx == NUM_SIM_MEAS_VALUES)
{
s_ndx = 0;
}
// Update simulated time stamp.
s_time_stamp.seconds += 27;
if (s_time_stamp.seconds > 59)
{
s_time_stamp.seconds -= 60;
s_time_stamp.minutes++;
if (s_time_stamp.minutes > 59)
{
s_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);
}
/**@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)
{
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);
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_BLOOD_PRESSURE);
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 simulating and sending one Blood Pressure Measurement.
*/
static void blood_pressure_measurement_send(void)
{
ble_bps_meas_t simulated_meas;
uint32_t err_code;
bool is_indication_enabled;
err_code = ble_bps_is_indication_enabled(&m_bps, &is_indication_enabled);
APP_ERROR_CHECK(err_code);
if (is_indication_enabled && !m_bps_meas_ind_conf_pending)
{
bps_sim_measurement(&simulated_meas);
err_code = ble_bps_measurement_send(&m_bps, &simulated_meas);
switch (err_code)
{
case NRF_SUCCESS:
// Measurement was successfully sent, wait for confirmation.
m_bps_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 Blood Pressure Service events.
*
* @details This function will be called for all Blood Pressure Service events which are passed to
* the application.
*
* @param[in] p_bps Blood Pressure Service structure.
* @param[in] p_evt Event received from the Blood Pressure Service.
*/
static void on_bps_evt(ble_bps_t * p_bps, ble_bps_evt_t * p_evt)
{
switch (p_evt->evt_type)
{
case BLE_BPS_EVT_INDICATION_ENABLED:
// Indication has been enabled, send a single blood pressure measurement.
blood_pressure_measurement_send();
break;
case BLE_BPS_EVT_INDICATION_CONFIRMED:
m_bps_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 initializing services that will be used by the application.
*
* @details Initialize the Blood Pressure, Battery, and Device Information services.
*/
static void services_init(void)
{
uint32_t err_code;
ble_bps_init_t bps_init;
ble_bas_init_t bas_init;
ble_dis_init_t dis_init;
ble_dis_sys_id_t sys_id;
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 Blood Pressure Service.
memset(&bps_init, 0, sizeof(bps_init));
bps_init.evt_handler = on_bps_evt;
bps_init.error_handler = service_error_handler;
bps_init.p_gatt_queue = &m_ble_gatt_queue;
bps_init.feature = BLE_BPS_FEATURE_BODY_MOVEMENT_BIT |
BLE_BPS_FEATURE_MEASUREMENT_POSITION_BIT;
// Here the sec level for the Blood Pressure Service can be changed/increased.
bps_init.bp_cccd_wr_sec = SEC_JUST_WORKS;
bps_init.bp_feature_rd_sec = SEC_OPEN;
err_code = ble_bps_init(&m_bps, &bps_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);
}
/**@brief Function for initializing the sensor simulators.
*/
static void sensor_simulator_init(void)
{
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);
// Simulated measurement #1.
m_bps_meas_sim_val[0].systolic.mantissa = SIM_MEAS_1_SYSTOLIC;
m_bps_meas_sim_val[0].systolic.exponent = 0;
m_bps_meas_sim_val[0].diastolic.mantissa = SIM_MEAS_1_DIASTOLIC;
m_bps_meas_sim_val[0].diastolic.exponent = 0;
m_bps_meas_sim_val[0].mean_arterial.mantissa = SIM_MEAS_1_MEAN_AP;
m_bps_meas_sim_val[0].mean_arterial.exponent = 0;
m_bps_meas_sim_val[0].pulse_rate.mantissa = SIM_MEAS_1_PULSE_RATE;
m_bps_meas_sim_val[0].pulse_rate.exponent = 0;
// Simulated measurement #2.
m_bps_meas_sim_val[1].systolic.mantissa = SIM_MEAS_2_SYSTOLIC;
m_bps_meas_sim_val[1].systolic.exponent = 0;
m_bps_meas_sim_val[1].diastolic.mantissa = SIM_MEAS_2_DIASTOLIC;
m_bps_meas_sim_val[1].diastolic.exponent = 0;
m_bps_meas_sim_val[1].mean_arterial.mantissa = SIM_MEAS_2_MEAN_AP;
m_bps_meas_sim_val[1].mean_arterial.exponent = 0;
m_bps_meas_sim_val[1].pulse_rate.mantissa = SIM_MEAS_2_PULSE_RATE;
m_bps_meas_sim_val[1].pulse_rate.exponent = 0;
// Simulated measurement #3.
m_bps_meas_sim_val[2].systolic.mantissa = SIM_MEAS_3_SYSTOLIC;
m_bps_meas_sim_val[2].systolic.exponent = 0;
m_bps_meas_sim_val[2].diastolic.mantissa = SIM_MEAS_3_DIASTOLIC;
m_bps_meas_sim_val[2].diastolic.exponent = 0;
m_bps_meas_sim_val[2].mean_arterial.mantissa = SIM_MEAS_3_MEAN_AP;
m_bps_meas_sim_val[2].mean_arterial.exponent = 0;
m_bps_meas_sim_val[2].pulse_rate.mantissa = SIM_MEAS_3_PULSE_RATE;
m_bps_meas_sim_val[2].pulse_rate.exponent = 0;
// Simulated measurement #4.
m_bps_meas_sim_val[3].systolic.mantissa = SIM_MEAS_4_SYSTOLIC;
m_bps_meas_sim_val[3].systolic.exponent = 0;
m_bps_meas_sim_val[3].diastolic.mantissa = SIM_MEAS_4_DIASTOLIC;
m_bps_meas_sim_val[3].diastolic.exponent = 0;
m_bps_meas_sim_val[3].mean_arterial.mantissa = SIM_MEAS_4_MEAN_AP;
m_bps_meas_sim_val[3].mean_arterial.exponent = 0;
m_bps_meas_sim_val[3].pulse_rate.mantissa = SIM_MEAS_4_PULSE_RATE;
m_bps_meas_sim_val[3].pulse_rate.exponent = 0;
}
/**@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);
}
/**@brief Function for handling the Connection Parameter events.
*
* @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 configuration 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)
{
uint32_t err_code;
ble_conn_params_init_t connection_params_init;
memset(&connection_params_init, 0, sizeof(connection_params_init));
connection_params_init.p_conn_params = NULL;
connection_params_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
connection_params_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
connection_params_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
connection_params_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
connection_params_init.disconnect_on_fail = false;
connection_params_init.evt_handler = on_conn_params_evt;
connection_params_init.error_handler = conn_params_error_handler;
err_code = ble_conn_params_init(&connection_params_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 = 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_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");
m_conn_handle = BLE_CONN_HANDLE_INVALID;
m_bps_meas_ind_conf_pending = false;
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 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)
{
blood_pressure_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 = 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 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_DELETE_SUCCEEDED event.
}
else{
ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
}
}
volatile bool bitcount_changed = false;
volatile unsigned int bitcount = 0;
volatile bool sda_status = true;
volatile bool scl_status = true;
volatile bool comm_started = false;
/*
typedef enum
{
NRF_GPIOTE_POLARITY_LOTOHI = GPIOTE_CONFIG_POLARITY_LoToHi, ///< Low to high.
NRF_GPIOTE_POLARITY_HITOLO = GPIOTE_CONFIG_POLARITY_HiToLo, ///< High to low.
NRF_GPIOTE_POLARITY_TOGGLE = GPIOTE_CONFIG_POLARITY_Toggle ///< Toggle.
} nrf_gpiote_polarity_t;
*/
/*
void in_pin_sda_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
//sda_status = nrf_gpio_pin_read(PIN_SDA);
nrf_gpio_pin_toggle(PIN_OUT);
// if(scl_status){
// if(!sda_status)
// {
// comm_started = true;
// bitcount = 0;
// }
// else
// {
// comm_started = false;
// if (bufferLength != SIZE_OF_BUFFER && bitcount > 8) { // write into ringbuffer
// circularBuffer[writeIndex] = bitcount;
// bufferLength++; // Increase buffer size after writing
// writeIndex++; // Increase writeIndex position to prepare for next write
// // If at last index in buffer, set writeIndex back to 0
// if (writeIndex == SIZE_OF_BUFFER) {
// writeIndex = 0;
// }
// }
// bitcount = 0;
// }
// }
}
*/
void in_pin_scl_handler(nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
{
nrf_drv_gpiote_out_set(PIN_OUT);
nrf_drv_gpiote_out_clear(PIN_OUT);
// if (scl_status && bufferLength != SIZE_OF_BUFFER) { // write into ringbuffer
// circularBuffer[writeIndex] = sda_status;
// bufferLength++; // Increase buffer size after writing
// writeIndex++; // Increase writeIndex position to prepare for next write
// // If at last index in buffer, set writeIndex back to 0
// if (writeIndex == SIZE_OF_BUFFER) {
// writeIndex = 0;
// }
// }
// if(scl_status && comm_started){
// bitcount++;
// }
}
static void my_gpio_init(void)
{
ret_code_t err_code;
// err_code = nrf_drv_gpiote_init();
// APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_LOTOHI(true);
in_config.pull = NRF_GPIO_PIN_PULLUP;
// err_code = nrf_drv_gpiote_in_init(PIN_SDA, &in_config, in_pin_sda_handler);
// APP_ERROR_CHECK(err_code);
err_code = nrf_drv_gpiote_in_init(PIN_SCL, &in_config, in_pin_scl_handler);
APP_ERROR_CHECK(err_code);
// nrf_drv_gpiote_in_event_enable(PIN_SDA, true);
nrf_drv_gpiote_in_event_enable(PIN_SCL, true);
nrf_drv_gpiote_out_config_t out_config = GPIOTE_CONFIG_OUT_SIMPLE(true);
err_code = nrf_drv_gpiote_out_init(PIN_OUT, &out_config);
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);
my_gpio_init();
power_management_init();
ble_stack_init();
gap_params_init();
gatt_init();
advertising_init();
services_init();
sensor_simulator_init();
conn_params_init();
peer_manager_init();
// Start execution.
NRF_LOG_INFO("Blood Pressure example started.");
application_timers_start();
advertising_start(erase_bonds);
// Enter main loop.
for (;;)
{
idle_state_handle();
// if (bufferLength != 0){
// if(circularBuffer[readIndex] == 8)
// {
// NRF_LOG_INFO(">");
// }
// else if (circularBuffer[readIndex] == 9)
// {
// NRF_LOG_INFO("<");
// }
// else
// {
// NRF_LOG_INFO("%d",circularBuffer[readIndex]);
// }
// bufferLength--; // Decrease buffer size after reading
// readIndex++; // Increase readIndex position to prepare for next read
// // If at last index in buffer, set readIndex back to 0
// if (readIndex == SIZE_OF_BUFFER) {
// readIndex = 0;
// }
// }
}
}
/**
* @}
*/
// <e> GPIOTE_ENABLED - nrf_drv_gpiote - GPIOTE peripheral driver - legacy layer //========================================================== #ifndef GPIOTE_ENABLED #define GPIOTE_ENABLED 1 #endif // <o> GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS - Number of lower power input pins #ifndef GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS #define GPIOTE_CONFIG_NUM_OF_LOW_POWER_EVENTS 6 #endif // <o> GPIOTE_CONFIG_IRQ_PRIORITY - Interrupt priority // <i> Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice // <0=> 0 (highest) // <1=> 1 // <2=> 2 // <3=> 3 // <4=> 4 // <5=> 5 // <6=> 6 // <7=> 7 #ifndef GPIOTE_CONFIG_IRQ_PRIORITY #define GPIOTE_CONFIG_IRQ_PRIORITY 2 #endif
