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Code Issues Wiki Activity

Fix datasheet incompliance for IST8310 compass chip

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This commit is contained in:
Konstantin Sharlaimov (DigitalEntity) 2018-07-08 21:23:46 +02:00
parent 6b2d5546e6
commit c4401dbc1d
1 changed files with 10 additions and 5 deletions
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15
src/main/drivers/compass/compass_ist8310.c
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@ -92,6 +92,7 @@
#define IST8310_REG_CNTRL1 0x0A #define IST8310_REG_CNTRL1 0x0A
#define IST8310_REG_CNTRL2 0x0B #define IST8310_REG_CNTRL2 0x0B
#define IST8310_REG_AVERAGE 0x41 #define IST8310_REG_AVERAGE 0x41
#define IST8310_REG_PDCNTL 0x42
// Parameter // Parameter
// ODR = Output Data Rate, we use single measure mode for getting more data. // ODR = Output Data Rate, we use single measure mode for getting more data.
@ -103,7 +104,8 @@
// Device ID (ist8310 -> 0x10) // Device ID (ist8310 -> 0x10)
#define IST8310_CHIP_ID 0x10 #define IST8310_CHIP_ID 0x10
#define IST8310_AVG_16 0x24 #define IST8310_AVG_16 0x24
#define IST8310_PULSE_DURATION_NORMAL 0xC0
#define IST8310_CNTRL2_RESET 0x01 #define IST8310_CNTRL2_RESET 0x01
#define IST8310_CNTRL2_DRPOL 0x04 #define IST8310_CNTRL2_DRPOL 0x04
@ -117,6 +119,9 @@ static bool ist8310Init(magDev_t * mag)
busWrite(mag->busDev, IST8310_REG_AVERAGE, IST8310_AVG_16); busWrite(mag->busDev, IST8310_REG_AVERAGE, IST8310_AVG_16);
delay(5); delay(5);
busWrite(mag->busDev, IST8310_REG_PDCNTL, IST8310_PULSE_DURATION_NORMAL);
delay(5);
return true; return true;
} }
@ -135,10 +140,10 @@ static bool ist8310Read(magDev_t * mag)
return false; return false;
} }
// need to modify when confirming the pcb direction // Looks like datasheet is incorrect and we need to invert Y axis to conform to right hand rule
mag->magADCRaw[X] = (int16_t)(buf[1] << 8 | buf[0]) * LSB2FSV; mag->magADCRaw[X] = (int16_t)(buf[1] << 8 | buf[0]) * LSB2FSV;
mag->magADCRaw[Y] = (int16_t)(buf[3] << 8 | buf[2]) * LSB2FSV; mag->magADCRaw[Y] = -(int16_t)(buf[3] << 8 | buf[2]) * LSB2FSV;
mag->magADCRaw[Z] = (int16_t)(buf[5] << 8 | buf[4]) * LSB2FSV; mag->magADCRaw[Z] = (int16_t)(buf[5] << 8 | buf[4]) * LSB2FSV;
return true; return true;
} }