mauri870 / baking-pi Goto Github PK

Hi Mauri,

First of all, so many thanks for making this repository public, it is so nice to have this information shared since the original baking pi repository is no longer maintained.

I tried running screen04 example, and experienced something quite unusual, so I made this video to demonstrate the problem (apologies the video quality isn't great - the clarity improves as the video progresses).

These are the files, and their MD5 checksums (note, I serve them over TFTP and have no SD card installed):

pi@raspberrypi:/tftpboot $ md5sum *
8caa083dfa5897d32eb9b8b06dc127a9  bootcode.bin
099f84eb105c14d3dd366a6bb6a35381  kernel8-32.img
7d9f51fc5e0779729fd21b849d3743a1  start.elf

There is no config.txt file, as you see.

I've tried older and newer firmware, but get the same results. The firmware (bootcode.bin and start.elf) from the video is from this commit but I also tried with much older firmware too, with the same results.

I generated kernel8-32.img simply running LESSON=screen04 make.

Many thanks for any help you can offer, and again many thanks for publishing your repository. 👍

Best wishes, Pete

Starting at exercise ok02 besides the fact the the program is always an infinite loop, the OK/ACT LED only flashes for some time until it stops and never return.

I think its a problem related to the mailboxes, first, the offset address of the mailboxes seems incorrect as described here. The offset for the write mailbox is 0x38. We are also not handling the response returned by de VideoCore GPU.