8 years, 6 months ago.

FRDM-K64F with FRDM-FXS-MULT2-B

Hello,

I'm trying to read the values of the gyroscope (FXAS21002C) on the mult2-b. I'm able to read out the values of all the other sensors, but for some reason the gyroscope (the one I actually need) isn't returning anything else besides X:16.80 Y:0.00 Z:0.00. The code I'm using is as follow:

1. include "mbed.h"
2. include "FXOS8700Q.h"
3. include "FXAS21000.h"

FXAS21000 gyro(D14, D15); FXOS8700Q_acc combo_acc(D14, D15, FXOS8700CQ_SLAVE_ADDR1); FXOS8700Q_mag combo_mag(D14, D15, FXOS8700CQ_SLAVE_ADDR3);

Serial pc(USBTX, USBRX);

int main() { float gyro_data[3]; MotionSensorDataUnits adata; MotionSensorDataUnits mdata;

printf("\r\nStarting\r\n\r\n"); combo_acc.enable(); combo_mag.enable(); printf("FXOS8700 Combo = %X\r\n", combo_acc.whoAmI()); printf("FXAS21000 Gyro = %X\r\n", gyro.getWhoAmI());

wait(3);

while(1) { combo_acc.getAxis(adata); printf("FXOS8700 Acc: X:%6.3f Y:%6.3f Z:%6.3f\r\n", adata.x, adata.y, adata.z); combo_mag.getAxis(mdata); printf("FXOS8700 Mag: X:%6.2f Y:%6.2f Z:%6.2f\r\n", mdata.x, mdata.y, mdata.z);

gyro.ReadXYZ(gyro_data); printf("FXAS21000 Gyro: X:%6.2f Y:%6.2f Z:%6.2f\r\n", gyro_data[0], gyro_data[1], gyro_data[2]);

printf("\r\n");

wait(1); } }

The header file I'm using says FXAS21000, but I changed the register data to:

1. define FXAS21000_SLAVE_ADDR 0x40

1. define FXAS21000_STATUS 0x00
2. define FXAS21000_WHOAMI 0x0C
3. define FXAS21000_XYZ_DATA_CFG 0x0E
4. define FXAS21000_CTRL_REG0 0x0D
5. define FXAS21000_CTRL_REG1 0x13
6. define FXAS21000_WHOAMI_VAL 0xD7

I have no clue why it isn't working. Who can help me out?