07-16-2023, 02:17 AM
(This post was last modified: 07-16-2023, 04:32 AM by WhiteHexagon.)
ok it seems like hardware OpenVG acceleration is going to involve the binary blob mali driver 
Not sure if OpenGL is another option because the documentation is still hiding from me. I found a 5GB lichee_BSP4.9 something or other linux bundle, thinking there must be docs and examples there, but nothing so far.
So I turned my attention to something 'simple' again
The RGB LEDs, since I start to understand the GPIO, or at least I thought I did. Seems like they should just be switchable on pins PD18,PD19,PD20. I configured those pins as 'output', set the Data pins high, and even tried enabling the pio gating register. No luck so far... I am wondering about the pull up/down resistors, or maybe they are multiplexed for something else?
btw I saw you got a nice deployment option setup to save SDCard switching for your RISC-V work, very nice! Any chance something similar would work for the PP. I am very gentle swapping the SDCard, but it feels like a risk in the long term. I even though about trying to get an old A64? board to experiment with, but then I would not have the same volume buttons and LEDs to challenge me
[Edit 1] Silly me, I had the LED registers copied as per doc, instead of my packed struct with MSB at the bottom hehe. LEDs working
[Edit 2] And the gating was not required.
Not sure if OpenGL is another option because the documentation is still hiding from me. I found a 5GB lichee_BSP4.9 something or other linux bundle, thinking there must be docs and examples there, but nothing so far.So I turned my attention to something 'simple' again
The RGB LEDs, since I start to understand the GPIO, or at least I thought I did. Seems like they should just be switchable on pins PD18,PD19,PD20. I configured those pins as 'output', set the Data pins high, and even tried enabling the pio gating register. No luck so far... I am wondering about the pull up/down resistors, or maybe they are multiplexed for something else?btw I saw you got a nice deployment option setup to save SDCard switching for your RISC-V work, very nice! Any chance something similar would work for the PP. I am very gentle swapping the SDCard, but it feels like a risk in the long term. I even though about trying to get an old A64? board to experiment with, but then I would not have the same volume buttons and LEDs to challenge me
[Edit 1] Silly me, I had the LED registers copied as per doc, instead of my packed struct with MSB at the bottom hehe. LEDs working
[Edit 2] And the gating was not required.