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espressif: busio.SPI: Use SPI_DMA_CH_AUTO 

All 3 micros we care about (S2, S3, C3) state in the documentation
that DMA channel can be specified as SPI_DMA_CH_AUTO.

Specifying a specific DMA channel explicitly doesn't _ever_ work on
ESP32-S3, so no SPI bus could be used.

Testing performed: On the ESP32-S3-DevKitC, used neopixel_spi to
turn the onboard neopixel red, green, and blue
This commit is contained in:
Jeff Epler 2021-12-04 08:56:42 -06:00
parent f594ab2e67
commit 1a99ce5eb3
1 changed files with 1 additions and 1 deletions
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2
ports/espressif/common-hal/busio/SPI.c
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@ -93,7 +93,7 @@ void common_hal_busio_spi_construct(busio_spi_obj_t *self,
mp_raise_ValueError(translate("All SPI peripherals are in use"));
}
esp_err_t result = spi_bus_initialize(self->host_id, &bus_config, self->host_id /* dma channel */);
esp_err_t result = spi_bus_initialize(self->host_id, &bus_config, SPI_DMA_CH_AUTO);
if (result == ESP_ERR_NO_MEM) {
mp_raise_msg(&mp_type_MemoryError, translate("ESP-IDF memory allocation failed"));
} else if (result == ESP_ERR_INVALID_ARG) {