Category: Hardware
Product Number: ADXL372
I can't get the ADXL372 to work.
Self Test is successful:
uint8_t val;
// SELF TEST
reg_write(0x3F, 0x00);
reg_write(0x41, 0x52);
HAL_Delay(10);
reg_write(0x3F, 0b11);
HAL_Delay(10);
reg_write(0x40, 0b1);
HAL_Delay(1000);
reg_read(0x40, &val);
if (val == 0x6) {
printf("\r\nADXL372 self-test sucess\r\n");
}And this is the init and first read out:
HAL_StatusTypeDef ret = HAL_OK;
ret |= reg_write(0x3F, 0x00); // standy mode
ret |= reg_write(0x41, 0x52); // reset
HAL_Delay(10);
ret |= reg_write(0x3D, 0x00); // ODR 400Hz
ret |= reg_write(0x3E, 0b1000); // BW 200Hz, Low Noise
ret |= reg_write(0x3F, 0b1111); // full bandwidth measurment mode, disable HPF and LPF
if (ret != HAL_OK) return ret;
do {
ret = reg_read(0x04, &val); // check if data is availabe
} while ((val & 0x01) == 0);
// read data
uint8_t buf[6];
ret |= spi_raw_accel_read_reg(0x08, buf, 6);
if (ret != HAL_OK) return ret;
uint16_t x = (((int16_t)((buf[0] << 8) | buf[1])) >> 4)&0x0FFF;
uint16_t y = (((int16_t)((buf[2] << 8) | buf[3])) >> 4)&0x0FFF;
uint16_t z = (((int16_t)((buf[4] << 8) | buf[5])) >> 4)&0x0FFF;
printf("ADXL372 X=%5d Y=%5d Z=%5d\r\n", x, y, z);
After I read out as soon data is available.
Output:
ADXL372 X= 14 Y= 0 Z= 4078 ADXL372 X= 9 Y= 4095 Z= 4079 ADXL372 X= 13 Y= 4093 Z= 4078 ADXL372 X= 6 Y= 1 Z= 4075 ADXL372 X= 9 Y= 2 Z= 4076 ADXL372 X= 11 Y= 4095 Z= 4079 ADXL372 X= 16 Y= 3 Z= 4078 ADXL372 X= 11 Y= 0 Z= 4076 ADXL372 X= 13 Y= 4093 Z= 4083
Whats wrong? I've tested two devices and the FIFO, and different Modes, same behavior.
