DMA memory-> uSD working

A project log for Multichannel Audio DSP Field Mixer Recorder

USBmidi, bluetooth app controll 8 chan portable DSP mixer.balanced audio IO,phantom power,flexible routing,ISO recording. networked Timecode

ben bilesben biles 05/24/2019 at 15:510 Comments

DMA is working from SAI interfaces -> memory & memory -> uSD cards for recording and playback.

I have UART / bluetooth RX TX working over DMA to.

I'm not using DMA for SPI or both I2C1 and I2C2 buses.

I might need to for the I2C readback from DSP if I start reading a lot of meters and LTC timecode etc.

I'm thinking I will make one large packet from all meter data. its 1 byte per meter with a few bytes for header info for each meter type. I think I can get all the useful data back to the android app in approx 45bytes per packet streaming at about 1kbps.