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Allow to flash an STM32 in bootloader mode through its SPI slave interface. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> BRANCH=none BUG=b:36125319 TEST=run from Eve AP: export SPIDEV="/dev/spidev32765.0" export GPIO_NRST=418 export GPIO_BOOT0=419 echo ${GPIO_BOOT0} > /sys/class/gpio/export echo "out" > /sys/class/gpio/gpio${GPIO_BOOT0}/direction echo ${GPIO_NRST} > /sys/class/gpio/export echo "out" > /sys/class/gpio/gpio${GPIO_NRST}/direction echo 1 > /sys/class/gpio/gpio${GPIO_BOOT0}/value echo 0 > /sys/class/gpio/gpio${GPIO_NRST}/value echo 1 > /sys/class/gpio/gpio${GPIO_NRST}/value stm32mon -s ${SPIDEV} -r /tmp/mcu-image.bin echo 0 > /sys/class/gpio/gpio${GPIO_BOOT0}/value echo 0 > /sys/class/gpio/gpio${GPIO_NRST}/value echo 1 > /sys/class/gpio/gpio${GPIO_NRST}/value echo "in" > /sys/class/gpio/gpio${GPIO_BOOT0}/direction echo "in" > /sys/class/gpio/gpio${GPIO_NRST}/direction re-verify UART flashing mode with 'flash_ec --board=eve_fp' Change-Id: Ic268dd9e62a2f279dd7992a4bbcf16fcf44c5f9e Reviewed-on: https://chromium-review.googlesource.com/456596 Commit-Ready: Vincent Palatin <vpalatin@chromium.org> Tested-by: Vincent Palatin <vpalatin@chromium.org> Reviewed-by: Todd Broch <tbroch@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit For instructions on building from source, refer to http://www.chromium.org/chromium-os/ec-development/getting-started-building-ec-images-quickly