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esp32/machine_hw_spi: Use separate DMA channels for HSPI and VSPI.

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Otherwise only one of HSPI or VSPI can be used at a time.  Fixes
issue #4068.
This commit is contained in:
Damien George 2019-01-23 23:40:06 +11:00
parent cd52d2c691
commit d82f344f61
1 changed files with 9 additions and 2 deletions
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11
ports/esp32/machine_hw_spi.c
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@ -186,9 +186,16 @@ STATIC void machine_hw_spi_init_internal(
}; };
//Initialize the SPI bus //Initialize the SPI bus
// FIXME: Does the DMA matter? There are two
ret = spi_bus_initialize(self->host, &buscfg, 1); // Select DMA channel based on the hardware SPI host
int dma_chan = 0;
if (self->host == HSPI_HOST) {
dma_chan = 1;
} else if (self->host == VSPI_HOST) {
dma_chan = 2;
}
ret = spi_bus_initialize(self->host, &buscfg, dma_chan);
switch (ret) { switch (ret) {
case ESP_ERR_INVALID_ARG: case ESP_ERR_INVALID_ARG:
mp_raise_msg(&mp_type_OSError, "invalid configuration"); mp_raise_msg(&mp_type_OSError, "invalid configuration");