which GPIO pins for SPI with DMA on lyrat 4.3
Posted: Thu Jan 09, 2020 2:22 pm
Hi,
I'd like to setup a SPI device located on external pins on Lyrat 4.3 dev board using DMA transfer.
so , 2 questions !
1/ is there DMA mapping on the ESP32 module for SPI ( only certain GPIO pins available for DMA / SPI ? )
2/ what pins are best to use ? the I2S pins are connected to the Codec IC. I don't need JTAG or SD card , should I used these? Or configure the UART GPIO pins to SPI ?
I can probebly work this out myself but wonder if theres an obvious example of external SPI setup with DMA I can look at for the Lyrat 4.3 board ?
I'd like to setup a SPI device located on external pins on Lyrat 4.3 dev board using DMA transfer.
so , 2 questions !
1/ is there DMA mapping on the ESP32 module for SPI ( only certain GPIO pins available for DMA / SPI ? )
2/ what pins are best to use ? the I2S pins are connected to the Codec IC. I don't need JTAG or SD card , should I used these? Or configure the UART GPIO pins to SPI ?
I can probebly work this out myself but wonder if theres an obvious example of external SPI setup with DMA I can look at for the Lyrat 4.3 board ?