Best posts made by Wulfsta

I have it working with the following bash script:

SWCLK=25
SWDIO=24
SRST=18

echo "Exporting SWCLK and SRST pins."
echo $SWCLK > /sys/class/gpio/export
echo $SRST > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio$SWCLK/direction
echo "out" > /sys/class/gpio/gpio$SRST/direction

echo "Setting SWCLK low and pulsing SRST."
echo "0" > /sys/class/gpio/gpio$SWCLK/value
echo "0" > /sys/class/gpio/gpio$SRST/value
echo "1" > /sys/class/gpio/gpio$SRST/value

echo "Unexporting SWCLK and SRST pins."
echo $SWCLK > /sys/class/gpio/unexport
echo $SRST > /sys/class/gpio/unexport

echo "Ready for OpenOCD."

openocd -c "adapter driver bcm2835gpio; \\
bcm2835gpio peripheral_base 0xFE000000; \\
bcm2835gpio speed_coeffs 236181 60; \\
adapter gpio swclk $SWCLK; \\
adapter gpio swdio $SWDIO; \\
adapter gpio srst $SRST; \\
transport select swd; \\
set CHIPNAME samc21; \\
source [find target/at91samdXX.cfg]; \\
reset_config srst_only; \\
adapter speed 276; \\
init; \\
reset; \\
reset; \\
at91samd chip-erase; \\
at91samd bootloader 0; \\
program Duet3Bootloader-SAMC21.elf verify; \\
reset; \\
shutdown"

echo "Done."

This is adapted from here.

@oliof I posted a script to flash 1LC boards using OpenOCD and a Pi elsewhere on the forum.

Seeing this thread, I really wish I had spent time making that band-aid test print use a bit less plastic...

@oliof yeah, that’s it. Huge pain to figure that out. I’ll add docs to klipper eventually, but it’s not my priority at the moment. Meanwhile it should be easy enough to figure out by looking at the schematics.