Hello !!
I have custom board on nrf52832 having 10 buttons which is pull down by default. I have achieved 22uA after modifying the ble_app_beacon example to broadcast when button is pressed.I am also having coin cell with the custom board so i want to check the battery voltage so that i could indicate the battery level (2 conditons i.e <10% & >10% ) using bi-colour led.
I have modified ble_app_beacon as per requirement and then integrated SAADC example with modified ble_app_beacon example. I am now getting more than 2 mA current consumption.
So, If anyone could help me with the code so that I could monitor the battery (on any interval) to indicate battery percentage. I am also attaching the main code so that it would be more understandable. My requirement is 3uA when there is no broadcasting.
/** * Copyright (c) 2014 - 2020, 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. * */ /** @file * * @defgroup ble_sdk_app_beacon_main main.c * @{ * @ingroup ble_sdk_app_beacon * @brief Beacon Transmitter Sample Application main file. * * This file contains the source code for an Beacon transmitter sample application. */ #include <stdbool.h> #include <stdint.h> #include "nordic_common.h" #include "bsp.h" #include "nrf_soc.h" #include "nrf_sdh.h" #include "nrf_sdh_ble.h" #include "ble_advdata.h" #include "app_timer.h" #include "nrf_drv_clock.h" #include "nrf_pwr_mgmt.h" #include "nrf_drv_saadc.h" #include "nrf_drv_ppi.h" #include "nrf_drv_timer.h" #include "boards.h" #include "nrf.h" #include "nrf_delay.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_log_default_backends.h" /***** Broadcast Parameters *******/ #define DEVICE_NAME "BLE_APP_BEACON" #define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */ #define NON_CONNECTABLE_ADV_INTERVAL MSEC_TO_UNITS(400, UNIT_0_625_MS) /**< The advertising interval for non-connectable advertisement (100 ms). This value can vary between 100ms to 10.24s). */ #define APP_ADV_DATA_LENGTH 0x15 /**< Length of manufacturer specific data in the advertisement. */ #define APP_DEVICE_TYPE 0x02 /**< 0x02 refers to Beacon. */ #define APP_COMPANY_IDENTIFIER 0x0059 /**< Company identifier for Nordic Semiconductor ASA. as per www.bluetooth.org. */ #define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */ #define HIGH 1 #define LOW 0 static ble_gap_adv_params_t m_adv_params; /**< Parameters to be passed to the stack when starting advertising. */ 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. */ uint16_t remote_led_indication; static uint8_t packet_buf; /****** TX buffer for buttons ******/ /****** ADC parameters *********/ #define SAMPLES_IN_BUFFER 1 volatile uint8_t state = 1; static const nrf_drv_timer_t m_timer = NRF_DRV_TIMER_INSTANCE(1); static nrf_saadc_value_t m_buffer_pool[2][SAMPLES_IN_BUFFER]; static nrf_ppi_channel_t m_ppi_channel; //static uint32_t m_adc_evt_counter; #define ADC_REF_VOLTAGE_IN_MILLIVOLTS 600 /**< Reference voltage (in milli volts) used by ADC while doing 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 DIODE_FWD_VOLT_DROP_MILLIVOLTS 270 /**< Typical forward voltage drop of the diode . */ #define ADC_RES_10BIT 1024 /**< Maximum digital value for 10-bit ADC conversion. */ #define ADC_RESULT_IN_MILLI_VOLTS(ADC_VALUE) \ ((((ADC_VALUE) *ADC_REF_VOLTAGE_IN_MILLIVOLTS) / ADC_RES_10BIT) * ADC_PRE_SCALING_COMPENSATION) void timer_handler(nrf_timer_event_t event_type, void * p_context) { } void saadc_sampling_event_init(void) { ret_code_t err_code; err_code = nrf_drv_ppi_init(); APP_ERROR_CHECK(err_code); nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG; timer_cfg.bit_width = NRF_TIMER_BIT_WIDTH_32; err_code = nrf_drv_timer_init(&m_timer, &timer_cfg, timer_handler); APP_ERROR_CHECK(err_code); /* setup m_timer for compare event every 400ms */ uint32_t ticks = nrf_drv_timer_ms_to_ticks(&m_timer, 400); nrf_drv_timer_extended_compare(&m_timer, NRF_TIMER_CC_CHANNEL0, ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, false); nrf_drv_timer_enable(&m_timer); uint32_t timer_compare_event_addr = nrf_drv_timer_compare_event_address_get(&m_timer, NRF_TIMER_CC_CHANNEL0); uint32_t saadc_sample_task_addr = nrf_drv_saadc_sample_task_get(); /* setup ppi channel so that timer compare event is triggering sample task in SAADC */ err_code = nrf_drv_ppi_channel_alloc(&m_ppi_channel); APP_ERROR_CHECK(err_code); err_code = nrf_drv_ppi_channel_assign(m_ppi_channel, timer_compare_event_addr, saadc_sample_task_addr); APP_ERROR_CHECK(err_code); } void saadc_sampling_event_enable(void) { ret_code_t err_code = nrf_drv_ppi_channel_enable(m_ppi_channel); APP_ERROR_CHECK(err_code); } 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; nrf_saadc_value_t adc_result; uint16_t batt_lvl_in_milli_volts; err_code = nrf_drv_saadc_buffer_convert(p_event->data.done.p_buffer, SAMPLES_IN_BUFFER); APP_ERROR_CHECK(err_code); int i; //NRF_LOG_INFO("ADC event number: %d", (int)m_adc_evt_counter); for (i = 0; i < SAMPLES_IN_BUFFER; i++) { adc_result=p_event->data.done.p_buffer[0]; batt_lvl_in_milli_volts = ADC_RESULT_IN_MILLI_VOLTS(adc_result); } remote_led_indication = batt_lvl_in_milli_volts; //m_adc_evt_counter++; } } void saadc_init(void) { ret_code_t err_code; nrf_saadc_channel_config_t channel_config = NRF_DRV_SAADC_DEFAULT_CHANNEL_CONFIG_SE(NRF_SAADC_INPUT_VDD); err_code = nrf_drv_saadc_init(NULL, saadc_callback); APP_ERROR_CHECK(err_code); err_code = nrf_drv_saadc_channel_init(0, &channel_config); APP_ERROR_CHECK(err_code); err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[0], SAMPLES_IN_BUFFER); APP_ERROR_CHECK(err_code); err_code = nrf_drv_saadc_buffer_convert(m_buffer_pool[1], SAMPLES_IN_BUFFER); APP_ERROR_CHECK(err_code); } /**@brief Function for the GAP initialization. * * @details This function will set up all the necessary GAP (Generic Access Profile) parameters of * the device. It also sets the permissions and appearance. */ static void gap_params_init(void) { uint32_t err_code; ble_gap_conn_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); } /**@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 = NULL, .len = 0 } }; /**@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 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_data_update(void) { uint32_t err_code; ble_advdata_t advdata; uint8_t flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE; ble_advdata_manuf_data_t manuf_specific_data; manuf_specific_data.company_identifier = APP_COMPANY_IDENTIFIER; manuf_specific_data.data.p_data = (uint8_t *) &packet_buf; manuf_specific_data.data.size = sizeof(packet_buf); advdata.p_manuf_specific_data = &manuf_specific_data; // Build and set advertising data. memset(&advdata, 0, sizeof(advdata)); //advdata.name_type = BLE_ADVDATA_NO_NAME; advdata.name_type = BLE_ADVDATA_FULL_NAME; advdata.flags = flags; advdata.p_manuf_specific_data = &manuf_specific_data; // Initialize advertising parameters (used when starting advertising). memset(&m_adv_params, 0, sizeof(m_adv_params)); m_adv_params.properties.type = BLE_GAP_ADV_TYPE_NONCONNECTABLE_NONSCANNABLE_UNDIRECTED; m_adv_params.p_peer_addr = NULL; // Undirected advertisement. m_adv_params.filter_policy = BLE_GAP_ADV_FP_ANY; m_adv_params.interval = NON_CONNECTABLE_ADV_INTERVAL; m_adv_params.duration = 400; // Broadcast for 4 sec. 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 = sd_ble_gap_adv_set_configure(&m_adv_handle, &m_adv_data, &m_adv_params); 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); /**** LED indication while advertising ****/ if (remote_led_indication > ("%d", 1920)){ nrf_gpio_pin_write(LED_1, LOW); // Green Led will Blink on less than 10% battery nrf_delay_ms(50); nrf_gpio_pin_write(LED_1, HIGH); nrf_delay_ms(50); } if (remote_led_indication < ("%d", 1920)){ nrf_gpio_pin_write(LED_2, LOW); // Red Led will Blink on more than 10% battery nrf_delay_ms(50); nrf_gpio_pin_write(LED_2, HIGH); nrf_delay_ms(50); } //err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING); //APP_ERROR_CHECK(err_code); } /**@brief Function for starting advertising. */ static void advertising_stop() { ret_code_t err_code; err_code = sd_ble_gap_adv_stop(m_adv_handle); APP_ERROR_CHECK(err_code); } /**@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(); 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); } /**@brief Function for initializing logging. */ 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 LEDs. */ static void leds_init(void) { ret_code_t err_code = bsp_init(BSP_INIT_LEDS, NULL); APP_ERROR_CHECK(err_code); } /**@brief Function for initializing timers. */ static void timers_init(void) { ret_code_t err_code = app_timer_init(); APP_ERROR_CHECK(err_code); } /**@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 handling bsp events. */ void bsp_evt_handler(bsp_event_t evt) { switch (evt) { case BSP_EVENT_KEY_0: packet_buf = BSP_EVENT_KEY_0; break; case BSP_EVENT_KEY_1: packet_buf = BSP_EVENT_KEY_1; break; case BSP_EVENT_KEY_2: packet_buf = BSP_EVENT_KEY_2; break; case BSP_EVENT_KEY_3: packet_buf = BSP_EVENT_KEY_3; break; case BSP_EVENT_KEY_4: packet_buf = BSP_EVENT_KEY_4; break; case BSP_EVENT_KEY_5: packet_buf = BSP_EVENT_KEY_5; break; case BSP_EVENT_KEY_6: packet_buf = BSP_EVENT_KEY_6; break; case BSP_EVENT_KEY_7: packet_buf = BSP_EVENT_KEY_7; break; case BSP_EVENT_KEY_8: packet_buf = BSP_EVENT_KEY_8; break; case BSP_EVENT_KEY_9: packet_buf = BSP_EVENT_KEY_9; break; case BSP_EVENT_KEY_10: packet_buf = BSP_EVENT_KEY_10; break; } NRF_LOG_INFO("%u", packet_buf); (void)sd_ble_gap_adv_stop(m_adv_handle); advertising_data_update(); advertising_start(); } /** * @brief Function for application main entry. */ int main(void) { NRF_POWER->DCDCEN = 1; uint32_t err_code = NRF_SUCCESS; // Initialize. nrf_pwr_mgmt_init(); //log_init(); timers_init(); //leds_init(); //power_management_init(); ble_stack_init(); gap_params_init(); //advertising_init(); advertising_data_update(); err_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, bsp_evt_handler); APP_ERROR_CHECK(err_code); saadc_init(); saadc_sampling_event_init(); saadc_sampling_event_enable(); // Start execution. NRF_LOG_INFO("Beacon example started."); advertising_start(); // Enter main loop. for(;;) { idle_state_handle(); } } /** * @} */
I would appreciate any help!!!
Thanks!!!