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PICO: Further implementation of DMA / SPI

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This commit is contained in:
blckmn 2025-04-05 13:13:23 +11:00
parent add56ec155
commit 0b376bff50
7 changed files with 164 additions and 25 deletions
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22
src/platform/PICO/bus_spi_pico.c
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@ -157,6 +157,8 @@ void spiInternalResetStream(dmaChannelDescriptor_t *descriptor)
void spiInternalInitStream(const extDevice_t *dev, bool preInit)
{
UNUSED(preInit);
int dma_tx = dma_claim_unused_channel(true);
int dma_rx = dma_claim_unused_channel(true);
@ -168,28 +170,24 @@ void spiInternalInitStream(const extDevice_t *dev, bool preInit)
const spiDevice_t *spi = &spiDevice[spiDeviceByInstance(dev->bus->busType_u.spi.instance)];
dma_channel_config config = dma_channel_get_default_config(dma_tx);
channel_config_set_transfer_data_size(&config, DMA_SIZE_8);
channel_config_set_dreq(&config, spi_get_dreq(spi, true));
channel_config_set_dreq(&config, spi_get_dreq(SPI_INST(spi->dev), true));
dma_channel_configure(dma_tx, &config, &spi_get_hw(spi)->dr, dev->txBuf, 0, false);
dma_channel_configure(dma_tx, &config, &spi_get_hw(SPI_INST(spi->dev))->dr, dev->txBuf, 0, false);
config = dma_channel_get_default_config(dma_rx);
channel_config_set_transfer_data_size(&config, DMA_SIZE_8);
channel_config_set_dreq(&config, spi_get_dreq(spi, false));
channel_config_set_dreq(&config, spi_get_dreq(SPI_INST(spi->dev), false));
dma_channel_configure(dma_rx, &config, dev->rxBuf, &spi_get_hw(spi)->dr, 0, false);
dev->
dma_channel_configure(dma_rx, &config, dev->rxBuf, &spi_get_hw(SPI_INST(spi->dev))->dr, 0, false);
}
void spiInternalStartDMA(const extDevice_t *dev)
{
const spiDevice_t *spi = &spiDevice[spiDeviceByInstance(dev->bus->busType_u.spi.instance)];
dma_channel_set_trans_count(dev->bus->dmaTx->channel, dev->bus->curSegment->len + 1, false);
dma_channel_set_trans_count(dev->bus->dmaRx->channel, dev->bus->curSegment->len + 1, false);
dma_channel_set_trans_count(dev->bus->dmaTx, dev->bus->curSegment->len + 1, false);
dma_channel_set_trans_count(dev->bus->dmaRx, dev->bus->curSegment->len + 1, false);
dma_channel_start(dev->bus->dmaTx);
dma_channel_start(dev->bus->dmaRx);
dma_channel_start(dev->bus->dmaTx->channel);
dma_channel_start(dev->bus->dmaRx->channel);
}
void spiInternalStopDMA (const extDevice_t *dev)