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RaspberryPI model 4B

Using RPi is way faster than for example Arduino. Original story: https://libreboot.org/docs/install/spi.html

SPI (Winbond W25Q16JV)

w25q16jv.png

  • Wiring:
winbond RaspberryPi 4B
1 CS 24/CEO SS
2 DO 12/MISO MISO
3 WP NC
4 GND GND
5 DI 21/MOSI MOSI
6 CLK 13/SCLK SCLK
7 RST 3.3V
8 VCC 3.3V
  • Flashrom
# test
./flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768

# read
./flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -r plaa.bin

# write
./flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=32768 -w plaa.bin