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main.c
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/**
* Copyright (c) 2015 - 2021, Nordic Semiconductor ASA
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form, except as embedded into a Nordic
* Semiconductor ASA integrated circuit in a product or a software update for
* such product, must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 4. This software, with or without modification, must only be used with a
* Nordic Semiconductor ASA integrated circuit.
*
* 5. Any software provided in binary form under this license must not be reverse
* engineered, decompiled, modified and/or disassembled.
*
* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#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_conn_params.h"
#include "nrf_sdh.h"
#include "nrf_sdh_ble.h"
#include "boards.h"
#include "app_timer.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 "ble_service.h"
#include "board_define.h"
#include "uart_usb_in_out.h"
#include "ecg_algorithm.h"
#include "heartrate_spo2_algorithm.h"
#include "max30003.h"
#include "max30101.h"
#include "si7051.h"
#include "protocol.h"
#include "nrf_drv_twi.h"
#include "nrf_drv_saadc.h"
#include "nrf_drv_spi.h"
#include "app_uart.h"
#include "nrf_uart.h"
#include "nrf_drv_ppi.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_saadc.h"
#define DEVICE_NAME "Smart ECG PPPG" /**< Name of device. Will be included in the advertising data. */
#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_DATA_READY_ADV_INTERVAL 320 /**< The advertising interval (in units of 0.625 ms; this value corresponds to 40 ms). */
#define APP_IDLE_ADV_INTERVAL 1280 /**< The advertising interval (in units of 0.625 ms; this value corresponds to 40 ms). */
#define APP_ADV_DURATION BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED /**< The advertising time-out (in units of seconds). When set to 0, we will never time out. */
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, 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 time-out (4 seconds). */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(20000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (15 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (5 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
#define APP_TIMER_DELAY APP_TIMER_TICKS(100)
#define MAX30101_APP_TIMER_DELAY APP_TIMER_TICKS(20)
#define MAX30003_APP_TIMER_DELAY APP_TIMER_TICKS(8)
#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
#define DISCONNECT_TIMEOUT 30
#define SAADC_SAMPLES_IN_BUFFER 1
BLE_SERVICE_DEF(m_service);
NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
NRF_BLE_QWR_DEF(m_qwr); /**< Context for the Queued Write module.*/
APP_TIMER_DEF(m_app_timer_id);
APP_TIMER_DEF(m_sensor_timer_id);
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
static uint8_t m_adv_handle = BLE_GAP_ADV_SET_HANDLE_NOT_SET; /**< Advertising handle used to identify an advertising set. */
static uint8_t m_enc_advdata[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; /**< Buffer for storing an encoded advertising set. */
static uint8_t m_enc_scan_response_data[BLE_GAP_ADV_SET_DATA_SIZE_MAX]; /**< Buffer for storing an encoded scan data. */
volatile uint8_t twi_read_done = 0x00;
volatile uint8_t twi_write_done = 0x00;
volatile uint8_t twi_address_nack = 0x00;
const nrf_drv_twi_t m_twi = NRF_DRV_TWI_INSTANCE(0);
volatile uint8_t spi_xfer_done = 0x00;
static const nrf_drv_spi_t m_spi = NRF_DRV_SPI_INSTANCE(1);
static nrf_saadc_value_t m_buffer_pool_low_power[2][SAADC_SAMPLES_IN_BUFFER];
static volatile uint8_t m_saadc_initialized = 0x00;
static volatile uint8_t one_sec_timer_update = 0x00;
static volatile uint8_t app_timer_update = 0x00;
static volatile uint8_t sensor_timer_update = 0x00;
volatile uint8_t max30003_100_ms_timer = 0x00;
volatile uint8_t max30101_100_ms_timer = 0x00;
volatile uint8_t si7051_100_ms_timer = 0x00;
static int16_t temperature = 0;
static uint8_t ir_heart_rate = 0;
static uint8_t ir_heart_rate_count = 0;
static uint8_t green_heart_rate = 0;
static uint8_t green_heart_rate_count = 0;
static uint8_t spo2 = 0;
static uint8_t spo2_count = 0;
static uint8_t ecg_heart_rate = 0;
static uint8_t ecg_heart_rate_count = 0;
static uint8_t battery_value = 0x00;
static volatile uint8_t tx_complete_state = 0x01;
static volatile uint8_t aggregator_notify_enable_state = 0x00;
static volatile uint8_t stream_notify_enable_state = 0x00;
static volatile uint16_t disconnect_timeout_count = 0;
static volatile uint8_t request_disconnect = 0x00;
static volatile uint8_t data_update_state = 0x00;
static uint8_t mac_address[8] = { 0x00 };
static packet_header_0_t packet_header_0;
static packet_header_1_t packet_header_1;
static packet_event_0_t packet_event_0;
static packet_event_1_t packet_event_1;
static product_id_t product_id;
static volatile uint8_t packet_id = 0;
static volatile uint8_t command_id = 0;
static volatile uint8_t node_packet_data_size;
static node_packet_data_t node_packet_data;
static uint32_t collection_cycle_timeout_count = COLLECTION_CYCLE_TIMEOUT;
static uint32_t collection_cycle_timer_count = 0;
static volatile uint8_t collection_cycle_update = 0x01;
/**@brief Struct that contains pointers to the encoded advertising data. */
static ble_gap_adv_data_t m_adv_data = { .adv_data = { .p_data = m_enc_advdata,
.len = BLE_GAP_ADV_SET_DATA_SIZE_MAX }, .scan_rsp_data = { .p_data =
m_enc_scan_response_data, .len = BLE_GAP_ADV_SET_DATA_SIZE_MAX
} };
/**@brief Function for assert macro callback.
*
* @details This function will be called in case of an assert in the SoftDevice.
*
* @warning This handler is an example only and does not fit a final product. You need to analyze
* how your product is supposed to react in case of Assert.
* @warning On assert from the SoftDevice, the system can only recover on reset.
*
* @param[in] line_num Line number of the failing ASSERT call.
* @param[in] p_file_name File name of the failing ASSERT call.
*/
void assert_nrf_callback(uint16_t line_num, const uint8_t *p_file_name) {
app_error_handler(DEAD_BEEF, line_num, p_file_name);
}
/**@brief Function for the Timer initialization.
*
* @details Initializes the timer module.
*/
static void app_time_timeout_handler(void *p_context) {
static uint8_t one_sec_timer_count = 0;
UNUSED_PARAMETER(p_context);
one_sec_timer_count += 1;
if (one_sec_timer_count > 10) {
collection_cycle_timer_count += 1;
if (collection_cycle_timer_count > collection_cycle_timeout_count) {
collection_cycle_update = 0x01;
collection_cycle_timer_count = 0;
}
one_sec_timer_update = 0x01;
one_sec_timer_count = 0;
}
max30003_100_ms_timer = 0x01;
max30101_100_ms_timer = 0x01;
si7051_100_ms_timer = 0x01;
app_timer_update = 0x01;
}
static void sensor_time_timeout_handler(void *p_context) {
UNUSED_PARAMETER(p_context);
sensor_timer_update = 0x01;
}
static void timers_init(void) {
// Initialize timer module, making it use the scheduler
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
err_code = app_timer_create(&m_app_timer_id, APP_TIMER_MODE_REPEATED,
app_time_timeout_handler);
APP_ERROR_CHECK(err_code);
err_code = app_timer_create(&m_sensor_timer_id, APP_TIMER_MODE_REPEATED,
sensor_time_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);
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 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(uint8_t data_update_state) {
ret_code_t err_code;
ble_advdata_t advdata;
ble_advdata_t srdata;
uint32_t interval = APP_IDLE_ADV_INTERVAL;
// Build and set advertising data.
memset(&advdata, 0, sizeof(advdata));
advdata.name_type = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance = true;
advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
if (data_update_state) {
ble_uuid_t adv_uuids[] = { { BLE_DATA_READY_UUID_SCAN_SERVICE,
m_service.uuid_type } };
memset(&srdata, 0, sizeof(srdata));
srdata.uuids_complete.uuid_cnt = sizeof(adv_uuids)
/ sizeof(adv_uuids[0]);
srdata.uuids_complete.p_uuids = adv_uuids;
interval = APP_DATA_READY_ADV_INTERVAL;
} else {
ble_uuid_t adv_uuids[] = { { BLE_IDLE_UUID_SCAN_SERVICE,
m_service.uuid_type } };
memset(&srdata, 0, sizeof(srdata));
srdata.uuids_complete.uuid_cnt = sizeof(adv_uuids)
/ sizeof(adv_uuids[0]);
srdata.uuids_complete.p_uuids = adv_uuids;
interval = APP_IDLE_ADV_INTERVAL;
}
err_code = ble_advdata_encode(&advdata, m_adv_data.adv_data.p_data,
&m_adv_data.adv_data.len);
APP_ERROR_CHECK(err_code);
err_code = ble_advdata_encode(&srdata, m_adv_data.scan_rsp_data.p_data,
&m_adv_data.scan_rsp_data.len);
APP_ERROR_CHECK(err_code);
ble_gap_adv_params_t adv_params;
// Set advertising parameters.
memset(&adv_params, 0, sizeof(adv_params));
adv_params.primary_phy = BLE_GAP_PHY_1MBPS;
adv_params.duration = APP_ADV_DURATION;
adv_params.properties.type =
BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
adv_params.p_peer_addr = NULL;
adv_params.filter_policy = BLE_GAP_ADV_FP_ANY;
adv_params.interval = interval;
err_code = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data,
&adv_params);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for handling Queued Write Module errors.
*
* @details A pointer to this function will be passed to each service which may need to inform the
* application about an error.
*
* @param[in] nrf_error Error code containing information about what went wrong.
*/
static void nrf_qwr_error_handler(uint32_t nrf_error) {
APP_ERROR_HANDLER(nrf_error);
}
static void ble_service_tx_complete_handler(uint16_t conn_handle,
ble_service_t *p_service) {
tx_complete_state = 0x02;
NRF_LOG_INFO("TX complete %d", tx_complete_state);
}
static void ble_service_notify_state_event_handler(uint16_t conn_handle,
ble_service_t *p_service, uint8_t p_event_notify_char, uint8_t p_event) {
if (p_event_notify_char == BLE_AGGREGATOR_CHAR) {
aggregator_notify_enable_state = p_event;
stream_notify_enable_state = 0x00;
NRF_LOG_INFO("Notify aggregator enable %d",
aggregator_notify_enable_state);
} else if (p_event_notify_char == BLE_STREAM_CHAR) {
aggregator_notify_enable_state = 0x00;
stream_notify_enable_state = p_event;
NRF_LOG_INFO("Notify stream enable %d", stream_notify_enable_state);
}
}
static void ble_service_write_handler(uint16_t conn_handle,
ble_service_t *p_service, uint8_t event_type, uint8_t const *buffer,
uint8_t buffer_size) {
if (buffer_size == 5) {
uint8_t control_number = buffer[0];
if (command_id != control_number) {
uint32_t collection_cycle = buffer[1] << 24;
collection_cycle |= buffer[2] << 16;
collection_cycle |= buffer[3] << 8;
collection_cycle |= buffer[4];
if (collection_cycle >= COLLECTION_CYCLE_TIMEOUT) {
collection_cycle_timeout_count = 0;
collection_cycle_timer_count = collection_cycle;
command_id = control_number;
}
}
}
}
/**@brief Function for initializing services that will be used by the application.
*/
static void services_init(void) {
ret_code_t err_code;
ble_service_init_t init = { 0 };
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);
init.ble_service_tx_complete_handler = ble_service_tx_complete_handler;
init.ble_service_notify_state_event_handler =
ble_service_notify_state_event_handler;
init.ble_write_handler = ble_service_write_handler;
err_code = ble_service_init(&m_service, &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 that
* 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 advertising.
*/
static void advertising_start(void) {
ret_code_t err_code;
err_code = sd_ble_gap_adv_start(m_adv_handle, APP_BLE_CONN_CFG_TAG);
APP_ERROR_CHECK(err_code);
}
static void adversting_stop(void) {
sd_ble_gap_adv_stop(m_adv_handle);
}
/**@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;
switch (p_ble_evt->header.evt_id) {
case BLE_GAP_EVT_CONNECTED:
NRF_LOG_INFO("Connected")
;
tx_complete_state = 0x01;
aggregator_notify_enable_state = 0x00;
stream_notify_enable_state = 0x00;
disconnect_timeout_count = 0;
request_disconnect = 0x00;
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")
;
tx_complete_state = 0x01;
aggregator_notify_enable_state = 0x00;
stream_notify_enable_state = 0x00;
disconnect_timeout_count = 0;
request_disconnect = 0x00;
m_conn_handle = BLE_CONN_HANDLE_INVALID;
gap_params_init();
advertising_init(data_update_state);
advertising_start();
break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
// Pairing not supported
err_code = sd_ble_gap_sec_params_reply(m_conn_handle,
BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
APP_ERROR_CHECK(err_code);
break;
case BLE_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_GATTS_EVT_SYS_ATTR_MISSING:
// No system attributes have been stored.
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
APP_ERROR_CHECK(err_code);
break;
case BLE_GATTC_EVT_TIMEOUT:
// Disconnect on GATT Client timeout event.
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);
#ifdef NRF528XX
sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
#endif
}
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();
}
}
static void wait_200ms() {
for (uint8_t i = 0; i < 2; i++) {
while (!app_timer_update) {
idle_state_handle();
}
app_timer_update = 0x00;
}
}
static uint8_t update_Heartrate_SPO2() {
uint8_t i2c_state = 0x01;
uint16_t printCount = 0;
uint32_t red = 0x00;
uint32_t ir = 0x00;
uint32_t green = 0x00;
uint8_t ppgErrorCount = 0;
app_timer_start(m_sensor_timer_id, MAX30101_APP_TIMER_DELAY, NULL);
i2c_state = i2c_state & set_max30101_normal_mode();
setHeartrateMinMax(40, 180);
if (i2c_state) {
for (uint32_t i = 0; i < 3000; i++) {
get_max30101_ir_red_green(&ir, &red, &green);
if (green > MAX30101_GREEN_PROXY_THR) {
updateHeartateGreen(green);
if (updateHeartateIR(ir, red) == 0x01) {
updateSpo2RedIrAcc();
}
ppgErrorCount = 0;
} else {
ppgErrorCount++;
if (ppgErrorCount > MAX30101_GREEN_PROXY_ERROR_COUNT) {
initHeartrate();
ppgErrorCount = 0;
}
}
printCount++;
if (printCount > 500) {
getHeartrateValue(&ir_heart_rate, &ir_heart_rate_count,
&green_heart_rate, &green_heart_rate_count);
getSpo2Value(&spo2, &spo2_count);
set_uart_usb_in_out_green_heartrate(green_heart_rate,
green_heart_rate_count);
set_uart_usb_in_out_ir_heartrate(ir_heart_rate,
ir_heart_rate_count);
set_uart_usb_in_out_spo2(spo2, spo2_count);
printCount = 0;
}
while (!sensor_timer_update) {
idle_state_handle();
}
sensor_timer_update = 0x00;
}
}
initHeartrate();
i2c_state = i2c_state & set_max30101_sleep_mode();
app_timer_stop(m_sensor_timer_id);
return i2c_state;
}
static uint8_t update_ECG() {
uint8_t spi_state = 0x01;
int32_t sample = 0;
uint16_t printCount = 0;
app_timer_start(m_sensor_timer_id, MAX30003_APP_TIMER_DELAY, NULL);
init_ecg_algorithm();
for (uint32_t i = 0; i < 7500; i++) {
spi_state = spi_state & get_max30003_ecg_voltage_sample(&sample);
sample = update_ecg_algorithm(sample);
get_ecg_heartrate(&ecg_heart_rate, &ecg_heart_rate_count);
printCount++;
if (printCount > 1250) {
set_uart_usb_in_out_ecg_heartrate(ecg_heart_rate,
ecg_heart_rate_count);
printCount = 0;
}
while (!sensor_timer_update) {
idle_state_handle();
}
sensor_timer_update = 0x00;
}
app_timer_stop(m_sensor_timer_id);
return spi_state;
}
static void saadc_callback(nrf_drv_saadc_evt_t const *p_event) {
if (p_event->type == NRF_DRV_SAADC_EVT_DONE) {
ret_code_t err_code;
err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer,
SAADC_SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
int32_t adc_0_value = p_event->data.done.p_buffer[0];
float battery = (float) adc_0_value / 255;
battery = battery * 3.6;
battery *= 3.0;
battery_value = (uint8_t) (battery * 10);
nrf_drv_saadc_uninit();
NRF_SAADC->INTENCLR = (SAADC_INTENCLR_END_Clear
<< SAADC_INTENCLR_END_Pos);
NVIC_ClearPendingIRQ(SAADC_IRQn);
m_saadc_initialized = 0x00;
NRF_LOG_INFO("BAT %d", battery_value);
NRF_LOG_FLUSH();
}
}
static void saadc_init(void) {
ret_code_t err_code;
nrf_drv_saadc_config_t saadc_config;
nrf_saadc_channel_config_t channel_config0;
saadc_config.resolution = NRF_SAADC_RESOLUTION_8BIT;
saadc_config.oversample = NRF_SAADC_OVERSAMPLE_DISABLED;
saadc_config.interrupt_priority = APP_IRQ_PRIORITY_LOW;
err_code = nrf_drv_saadc_init(&saadc_config, saadc_callback);
APP_ERROR_CHECK(err_code);
channel_config0.reference = NRF_SAADC_REFERENCE_INTERNAL;
channel_config0.gain = NRF_SAADC_GAIN1_6;
channel_config0.acq_time = NRF_SAADC_ACQTIME_10US;
channel_config0.mode = NRF_SAADC_MODE_SINGLE_ENDED;
channel_config0.pin_p = NRF_SAADC_INPUT_AIN3;
channel_config0.pin_n = NRF_SAADC_INPUT_DISABLED;
channel_config0.resistor_p = NRF_SAADC_RESISTOR_DISABLED;
channel_config0.resistor_n = NRF_SAADC_RESISTOR_DISABLED;
err_code = nrf_drv_saadc_channel_init(0, &channel_config0);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool_low_power[0],
SAADC_SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool_low_power[1],
SAADC_SAMPLES_IN_BUFFER);
APP_ERROR_CHECK(err_code);
}
static void read_battery_level(void) {
if (!m_saadc_initialized) {
saadc_init();
}
m_saadc_initialized = 0x01;
nrf_drv_saadc_sample();
while (m_saadc_initialized) {
idle_state_handle();
}
nrf_gpio_pin_clear(GPIO_BAT_EN);
}
static void twi_scan(void) {
NRF_LOG_INFO("I2C Scan started.");
for (uint16_t i = 0; i < 127; i++) {
uint8_t reg = 0x01;
uint8_t twi_timeout = 5;
twi_write_done = 0x00;
twi_read_done = 0x00;
twi_address_nack = 0x00;
nrf_drv_twi_tx(&m_twi, i, ®, 1, false);
while (!twi_write_done && --twi_timeout) {
idle_state_handle();
}
if (!twi_address_nack) {
set_uart_usb_in_out_find_i2c_address(i);
NRF_LOG_INFO("FIND %02X", i);
}
NRF_LOG_FLUSH();
}
}
static void twi_handler(nrf_drv_twi_evt_t const *p_event, void *p_context) {
switch (p_event->type) {
case NRF_DRV_TWI_EVT_DONE:
twi_write_done = 0x01;
twi_read_done = 0x01;
break;
default:
// NRF_DRV_TWI_EVT_ADDRESS_NACK,
// NRF_DRV_TWI_EVT_DATA_NACK
twi_write_done = 0x01;
twi_read_done = 0x01;
twi_address_nack = 0x01;
break;
}
}
static void twi_init(void) {
ret_code_t err_code;
const nrf_drv_twi_config_t twi_config =
{ .scl = I2C_SCL_GPIO, .sda = I2C_SDA_GPIO, .frequency =
NRF_DRV_TWI_FREQ_400K, .interrupt_priority =
APP_IRQ_PRIORITY_HIGH, .clear_bus_init = false };
err_code = nrf_drv_twi_init(&m_twi, &twi_config, twi_handler, NULL);
APP_ERROR_CHECK(err_code);
nrf_drv_twi_enable(&m_twi);
}