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Hi Michael

This is an old post, I realise, but I just found it and decided to have a go at adapting your code for the Teensy 4.1 and my vstcm vector generator PCB which targets real vector...

Thanks for your reply. I have managed to do concurrent writes to the 2 easily accessible SPI busses now after repinning my PCB, but there is no performance gain, possible as i'm only writing 16 bits...

I have now got SPI.transfer16 and the non blocking SPI.transfer with event handler working, but I'm addressing each of the 3 MCP4922 DACs with dual channels sequentially and sending 12 bits of data +...

I am using a Teensy 4.1 to write to 3 dual channel MCP4922 DACs with the non blocking SPI.transfer command and an event handler (eg SPI.transfer(dmabuf, nullptr, 2, callbackHandler); ). I'm currently...

I tried out transfer16 and just could not get it to work for some reason. I didn't realise that there was transfer32. I'll try again... thanks for the suggestion.

Yes, performance is lacking as I'm updating the 5 channels sequentially. I'm using the simple form of SPI.transfer with one parameter which is the data (which is blocking, I believe). There seems to...

Anyone able to offer any advice on this? It's an open source project for the arcade community. I was thinking that FlexIO could be an alternative solution to DMA maybe?

I have just posted up the complete project on Github: schematic, gerber, BOM, code, etc in the hope that this will encourage someone to spend a little time getting DMA up and working on this exciting...

I'm using Arduino 1.8.19 / Teensyduino 1.56 to code a custom PCB which has a Teensy 4.1 and 3 external MCP4922 dual channel DACs. The code is meant to take a buffer of data and send it to the...