Posted on March 04, 2014 at 01:07I am using the LSM9DS0 as a 9DOF IMU for a motion sensing application. I need the temperature sensor to compensate for temperature-induced gyro drift. I can get everything to work, but the temperature always reads 0x00 on both the high and low byte. I set the TEMP_EN bit high and read both high and low OUT_TEMP_XM registers. I have everything enabled and the mag/acc/gyro all update properly. I have tried many combinations of settings and still read 0x0000 for temperature. I have also tried multiple physical parts, so that's not the problem. Anyone know if there's a known issue with the temperature sensor? Thanks.
Here's the code for my control register settings:
LDD_TError set_XM_control_regs() {
LDD_TError I2C_Error;
I2C_Error = Hand_SelectSlaveDevice(MAGNETOMETER_ADDR);
if (I2C_Error != ERR_OK) {
return I2C_Error;
}
I2C_OutBuffer[0] = LSM9_CTRL_REG0_XM | 0x80;
I2C_OutBuffer[1] = 0x00; // no FIFO or filter
I2C_OutBuffer[2] = 0x3F; // 12.5Hz accelerometer
I2C_OutBuffer[3] = 0x00; // +/- 2 g
I2C_OutBuffer[4] = 0x00; // no interrupts
I2C_OutBuffer[5] = 0x00; // no interrupts
I2C_OutBuffer[6] = 0xE8; // temperature, high res, 12.5Hz magnetometer
I2C_OutBuffer[7] = 0x60; // +/- 12 gauss
I2C_OutBuffer[8] = 0x80; // magnetometer continuous conversion
return Hand_MasterSendBlock(9);
}
Also, the FIFO in the mag/accel portion is disabled. FIFO_CTRL_REG is set to 0x00.
#temperature-sensor-lsm9ds0
