Part Number: ADS131M02
Hello.
I'm using ADS131M02 to convert photo diode's value with raspberry pi 4B+.
When read CLOCK register, Response data is 0x030E. That is default value.
And write CLOCK register that data is 0x030A, Response data is 0x4180. It also right.
But read CLOCK register again, Response data is 0x0264.
What's problem?
if __name__ == "__main__":
ad_rst.off()
ad_rst.on()
spi = spidev.SpiDev()
spi.open(0, 0)
spi.max_speed_hz = 50000
#spi.max_speed_hz = 8192000
#spi.max_speed_hz = 1000000
spi.mode = 0b01
tmp = [0xA1,0x80]
crcr = calCRC16(tmp,0,2)
crcr1 = (crcr&0xFF00)>>8
crcr2 = crcr&0x00FF
tmp.extend([crcr1,crcr2])
spi.xfer(tmp)
rrr = spi.readbytes(24)
print(rrr)
tmp = [0x61,0x80,0x03,0x0A]
crcr = calCRC16(tmp,0,4)
crcr1 = (crcr&0xFF00)>>8
crcr2 = crcr&0x00FF
tmp.extend([crcr1,crcr2])
spi.xfer(tmp)
rrr = spi.readbytes(24)
print(rrr)
tmp = [0xA1,0x80]
crcr = calCRC16(tmp,0,2)
crcr1 = (crcr&0xFF00)>>8
crcr2 = crcr&0x00FF
tmp.extend([crcr1,crcr2])
spi.xfer(tmp)
rrr = spi.readbytes(24)
print(rrr)
