ADXL355 SPI ESP32-IDF

Sure, here is an example of how to use the ADXL355 sensor with SPI in ESP32-IDF:

1. First, make sure you have the ESP32-IDF environment set up and the necessary SPI driver installed.

2. Include the necessary header files:

#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <esp_system.h>
#include <driver/spi_master.h>

3. Define the SPI bus parameters:

4. Initialize the SPI bus:

.miso_io_num = PIN_NUM_MISO,
.sclk_io_num = PIN_NUM_CLK,
.quadwp_io_num = -1,
.quadhd_io_num = -1,
};

spi_bus_initialize(VSPI_HOST, &bus_config,1);

5. Attach the ADXL355 device to the SPI bus:

spi_device_interface_config_t dev_config = {
.mode =0,
.clock_speed_hz =1000000, // Adjust as per your requirement .spics_io_num = PIN_NUM_CS,
.queue_size =1,
};

spi_bus_add_device(VSPI_HOST, &dev_config, &spi);

6. Define a function to read the X, Y, Z values from the ADXL355 sensor:

spi_transaction_t t;
memset(&t,0, sizeof(t));
uint8_t tx_data[5] = {0x0B,0x00,0x00,0x00,0x00}; // SPI command to read X, Y, Z values uint8_t rx_data[5] = {0};

t.length =40; // Number of bits to send/receive t.tx_buffer = tx_data;
t.rx_buffer = rx_data;

spi_device_queue_trans(spi, &t, portMAX_DELAY);
spi_transaction_t* completed_transaction;
spi_device_get_trans_result(spi, &completed_transaction, portMAX_DELAY);

*x = (rx_data[1] <<8) | rx_data[2];
*y = (rx_data[3] <<8) | rx_data[4];
*z = (rx_data[5] <<8) | rx_data[6];
}

7. Create a task to continuously read and print the ADXL355 values:

int16_t x, y, z;

while (1) {
read_adxl355(spi, &x, &y, &z);

printf("X: %d, Y: %d, Z: %d\n", x, y, z);

vTaskDelay(1000 / portTICK_PERIOD_MS); // Delay for1 second }
}

void app_main() {
xTaskCreate(adxl355_task, "adxl355_task",2048, NULL,5, NULL);
}

Make sure to connect the appropriate pins of the ADXL355 sensor to the ESP32 board's SPI pins (MISO, CLK, CS). Adjust the pin numbers and SPI settings in the code according to your setup.

This example sets up a task that continuously reads the X, Y, Z values from the ADXL355 sensor using SPI and prints them every second.