ESP32 - S3 build (ESP IDF 4) - Error Initialising SPI1

[SimonGAndrews]

See Forum Where issues identified by @devsnd result in a restart of the ESP32 - S3 when
SPI1.setup({ sck:D4, mosi:D5 });
is executed in a script.
The issue does not occur when this code is used:
var spi = new SPI(); spi.setup({ sck:D4, mosi:D5 });

The restart is preceeded with the message:

spi_bus_initialize is called in Espruino from targets/esp32/jshardwareSpi.c
Investigation to follow.

[MaBecker]

My guess: This could be some hard coded dma channel or an sdconfig issue.

[gfwilliams]

Thanks for looking into this! As you say it looks like targets/esp32/jshardwareSpi.c has a hard-coded dma channel. It looks suspiciously like we may just be able to specify SPI_DMA_CH_AUTO? https://docs.espressif.com/projects/esp-idf/en/v4.4/esp32/api-reference/peripherals/spi_master.html?highlight=spi_dma_ch_auto

You probably spotted the pins are hard-coded too, so ideally this could benefit from the same approach you used for I2C

[SimonGAndrews]

Thanks, yep will check out the use of SPI_DMA_CH_AUTO
And look at the pins. The i2c2 pins need defining also. I’m not as familiar with SPI so doing a little home work this am. Should be able to sort.

[gfwilliams]

I’m not as familiar with SPI so doing a little home work this am

Thanks! If you want a quick test, connect MOSI and MISO pins together, and you should then be able to do SPI.send("Hello") and get the same characters back!

[SimonGAndrews]

Nice Tip. Thanks.
Just to confirm this issue also occurs in the ESP32C3_IDF4 (ESP32-C3 target) build so will fix for both targets.