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mlorenzati / pico-rgb2hdmi

A microprocessed RGB to HDMI Converter with USB capture
MIT License
70 stars 11 forks source link

WM8231? Other ICs? #38

Open King-Icewind opened 7 months ago

King-Icewind commented 7 months ago

Hello,

As you know, the WM2813 is now obsolete. What are your thoughts on using the WM8231? It is an active part for now.

Any other possible ICs to use? Could an STM32F11 be used in lieu of an AFE?

thanks!

mlorenzati commented 7 months ago

On the first question, I have to see in detail but on a high level view, there are significant differences. Just see WM8199, is pin compatible and it has hw and peripherals differences. I'm analysing the LM98714 which is 45Msps 3 channels afe and most importantly cost effective.

Regarding the MCU, is heavy using the PIO interface that releases a lot of cpu usage and has great interconnection to DMA/IRQ.

El vie, 26 ene 2024 a la(s) 7:24 p.m., Keys of Kings ( @.***) escribió:

Hello,

As you know, the WM2813 is now obsolete. What are your thoughts on using the WM8231? It is an active part for now.

Any other possible ICs to use? Could an STM32F11 be used in lieu of an AFE?

thanks!

— Reply to this email directly, view it on GitHub https://github.com/mlorenzati/pico-rgb2hdmi/issues/38, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABJGQOZWGVMSHFNZOOKS4Z3YQQULNAVCNFSM6AAAAABCMZW772VHI2DSMVQWIX3LMV43ASLTON2WKOZSGEYDEOJYHA2TKOA . You are receiving this because you are subscribed to this thread.Message ID: @.***>

King-Icewind commented 7 months ago

On the first question, I have to see in detail but on a high level view, there are significant differences. Just see WM8199, is pin compatible and it has hw and peripherals differences. I'm analysing the LM98714 which is 45Msps 3 channels afe and most importantly cost effective. Regarding the MCU, is heavy using the PIO interface that releases a lot of cpu usage and has great interconnection to DMA/IRQ. El vie, 26 ene 2024 a la(s) 7:24 p.m., Keys of Kings ( @.) escribió: … Hello, As you know, the WM2813 is now obsolete. What are your thoughts on using the WM8231? It is an active part for now. Any other possible ICs to use? Could an STM32F11 be used in lieu of an AFE? thanks! — Reply to this email directly, view it on GitHub <#38>, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABJGQOZWGVMSHFNZOOKS4Z3YQQULNAVCNFSM6AAAAABCMZW772VHI2DSMVQWIX3LMV43ASLTON2WKOZSGEYDEOJYHA2TKOA . You are receiving this because you are subscribed to this thread.Message ID: @.>

Thank you for the reply. Unfortunately, the WM8199 is end of life. I’m not worried about pin compatibility as my application is custom. Interested in the LM98714. Thanks for all the great work.

mlorenzati commented 6 months ago

I'm placing my last bits into this version (HDMI + audio + stabilization) and I'll move to the R&D on LM98714, stay tuned!

monte-monte commented 5 months ago

Should WM8214 work? Difference seems to be only in sample rate. I can find those on aliexpress/ebay but not WM8213/WM8199.

mlorenzati commented 5 months ago

Yes, it works perfectly and has higher sampling rate, if the colors get shifted due to timing differences, the latest version supports gain/offset setup per individual RGB