Firmware download error

dominc8 · October 4, 2019, 9:01pm

Hello. I wanted to program pixy with modified firmware. Unfortunately after building whole firmware according to instructions on wiki I get the following error:
‘error：firmware header is not present or is corrupt’
And after that on pixymon in the console it says:
‘Pixy detected.
error: Can’t get firmware version’
Could you help me fix this asap?
(Even building clean project cloned from github shows the same error so it is not caused by my modifications)

edge · October 4, 2019, 9:45pm

Hello,
You need to run fappend on the hex file:

github.com

charmedlabs/pixy2/blob/master/src/device/main_m4/spifi/fappend

#/bin/bash
# This script adds a version header to a Pixy .hex firmware file.  
sed -b -i 's/^.*:/:/' pixy_firmware.hex
if [[ $# -eq 9 ]]; then
	printf "general,%d,%d,%d,%d,%d,%d,%d,%d,%d" $1 $2 $3 $4 $5 $6 $7 $8 $9 | cat - pixy_firmware.hex > pixy_firmware2.hex
	mv pixy_firmware2.hex pixy2_firmware-$1.$2.$3-general.hex
elif [[ $# -eq 3 ]]; then
	printf "general,%d,%d,%d,0,255,0,255,0,255" $1 $2 $3 | cat - pixy_firmware.hex > pixy_firmware2.hex
	mv pixy_firmware2.hex pixy_firmware-$1.$2.$3-general.hex
else
	printf "general,x,x,x,0,255,0,255,0,255" | cat - pixy_firmware.hex > pixy_firmware2.hex
	mv pixy_firmware2.hex pixy2_firmware-x.x.x-general.hex
fi

You can run it as

fappend

to specify the firmware version

or you can run it without args if you don’t care. The version number is used as a clue to pixymon to compare firmware files.

fappend will take the firmware you built “pixy_firmware2.hex” and output a file with a header.

Edward