Interfacing (DSI, CSI, I2C, etc.) • Re: SPI Read

There is no read value when changing 50MHz into 1MHz. No change in pin connections.

pin connections:

RPI3 - W25Q64FV
MOSI - DI
MISO - D0
SPI_CLK - CLK
CE0 - CS
GND - GND
3.3V - VCC

need to verify the pin connections.


change the code as below according to Chip select pin.


import spidev
import time
import RPi.GPIO as GPIO


unique_id_reg=0x4B
dummybyte=0x00

GPIO.setwarnings(False)

# Set up GPIO mode
GPIO.setmode(GPIO.BOARD) # Use Broadcom (BCM) GPIO numbering scheme
mode = GPIO.getmode()
print(mode)
SPI_CE0 = 24 # GPIO 8 (physical pin 24)

#GPIO.setup(SPI_CE0, GPIO.OUT)
GPIO.setup(SPI_CE0, GPIO.OUT, initial=GPIO.HIGH)


spi = spidev.SpiDev()
spi.open(0,0)
spi.max_speed_hz = 1000000
spi.mode = 0


GPIO.output(SPI_CE0, GPIO.LOW) # Set CE0 to low to enable communication

sendCommand=[unique_id_reg,dummybyte,dummybyte,dummybyte,dummybyte]
spi.writebytes(sendCommand)

unique_id=spi.readbytes(8)

# Set CS pin to high to disable communication
GPIO.output(SPI_CE0, GPIO.HIGH)

print("Unique ID:", ''.join(format(x, '02x') for x in unique_id))


spi.close()

# Clean up GPIO settings
GPIO.cleanup()

Statistics: Posted by Fwpriya — Wed Mar 20, 2024 5:36 am

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