A/Dコンバータの値を取り込む
MCP3008でボリュームの抵抗の変化を読み込む
#
# python scucess version
# at MCP3008
#
import wiringpi as pi
import time
SPI_CH = 0
READ_CH = 0
pi.wiringPiSPISetup(SPI_CH,200000)
while True:
buffer = 0x6000 | (0x0400 * READ_CH)
buffer = buffer.to_bytes(2, byteorder='big')
pi.wiringPiSPIDataRW(SPI_CH, buffer)
value = (buffer[0] * 256 + buffer[1]) & 0x3ff
volt = value * 3.3 / 1023
print("DATA:" , value, " Volt:", volt, "V")
time.sleep(0.5)
ボリュームを回すと抵抗値が変わります
