Hi, I am fairly new to the NRF and was wondering if there was a way to increase the sampling rate to 100Hz. I have used the ble_app_uart example to configure this code:
This is the Header File
#ifndef _BLUETOOTH_H #define _BLUETOOTH_H #include <stdint.h> #include <string.h> #include "nordic_common.h" #include "nrf.h" #include "ble_hci.h" #include "ble_advdata.h" #include "ble_advertising.h" #include "ble_conn_params.h" #include "nrf_sdh.h" #include "nrf_sdh_soc.h" #include "nrf_sdh_ble.h" #include "nrf_ble_gatt.h" #include "nrf_ble_qwr.h" #include "app_timer.h" #include "ble_nus.h" #include "app_uart.h" #include "app_util_platform.h" #include "bsp_btn_ble.h" #include "nrf_pwr_mgmt.h" #include "nrf_drv_saadc.h" #include "nrf_drv_ppi.h" #include "nrf_drv_timer.h" #include "nrf_log.h" #if defined (UART_PRESENT) #include "nrf_uart.h" #endif #if defined (UARTE_PRESENT) #include "nrf_uarte.h" #endif #include "gpio_control.h" #include "temperature.h" /* Define */ #define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */ #define DEVICE_NAME "nRF_Peripheral" /**< Name of device. Will be included in the advertising data. */ #define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */ #define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */ #define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */ #define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */ #define MIN_CONN_INTERVAL MSEC_TO_UNITS(7.5, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */ #define MAX_CONN_INTERVAL MSEC_TO_UNITS(25, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */ #define SLAVE_LATENCY 0 /**< Slave latency. */ #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(250, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */ #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */ #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */ #define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */ #define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */ #define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */ #define SAADC_SAMPLES_IN_BUFFER 4 #define SAADC_SAMPLE_RATE 1 /**< SAADC sample rate in ms. */ BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */ void uart_init(void); void buttons_leds_init(bool * p_erase_bonds); void ble_stack_init(void); void gap_params_init(void); void gatt_init(void); void services_init(void); void conn_params_init(void); void saadc_sampling_event_init(void); void saadc_sampling_event_enable(void); void advertising_start(void); void saadc_init(void); void advertising_init(void); #endif
This is the C file:
In this code, I am trying to sample the 4 channels at 100Hz, but when I do, I get the NRF_RESOURCES error.
In the ble_gatts.h I have also changed the BLE_GATTS_HVN_TX_QUE_SIZE_DEFAULT to 8 along with
#ifndef NRF_SDH_BLE_GAP_EVENT_LENGTH #define NRF_SDH_BLE_GAP_EVENT_LENGTH 6 #endif // <o> NRF_SDH_BLE_GATT_MAX_MTU_SIZE - Static maximum MTU size. #ifndef NRF_SDH_BLE_GATT_MAX_MTU_SIZE #define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247 #endif
It seems that I am getting the error from the buffer overflow, but I am lost as to how to address this problem. Any pointers or help would be greatly appreciated.
Thankyou!
