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by adamransom
Wed Nov 16, 2016 2:30 am
Forum: Bare metal, Assembly language
Topic: Mailbox clarifications
Replies: 4
Views: 3875

Re: Mailbox clarifications

Thanks rst, I actually did the same experiment (slightly differently) and came to the same conclusion. I also assumed that the common uses of mailboxes wont be filling them up, so checking for the wrong status (or checking at all) doesn't really matter. However, I would like to implement it correctl...
by adamransom
Tue Nov 15, 2016 7:28 am
Forum: Bare metal, Assembly language
Topic: Mailbox clarifications
Replies: 4
Views: 3875

Re: Mailbox clarifications

Thanks for your reply! all of the working implementations only use Mailbox 0 (Read and Write) When those implementations write to Mailbox 0, they use offset 0x20, which according to the wiki is Mailbox 1's read/write. I haven't seen any implementations using offset 0x0 (Mailbox 0 read/write) for wri...
by adamransom
Sun Nov 13, 2016 7:24 am
Forum: Bare metal, Assembly language
Topic: Mailbox clarifications
Replies: 4
Views: 3875

Mailbox clarifications

I've been playing around with some bare-metal examples on the Raspberry Pi 3 for a while now and considering the changes to the ACT LED, the first thing you need to do is implement mailbox communication with the VideoCore. Whilst the mailbox documentation ( https://github.com/raspberrypi/firmware/wi...

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