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G4 SPI DMA support

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This commit is contained in:
Steve Evans 2021-08-09 22:24:18 +01:00 • committed by Michael Keller
parent c283981d54
commit ab66795eeb
10 changed files with 75 additions and 289 deletions
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15
src/main/drivers/bus_spi.c
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@ -543,7 +543,9 @@ void spiInitBusDMA()
break;
}
#endif
bus->dmaTxChannel = dmaTxChannelSpec->channel;
bus->dmaTx = dmaGetDescriptorByIdentifier(dmaTxIdentifier);
bus->dmaTx->stream = DMA_DEVICE_INDEX(dmaTxIdentifier);
bus->dmaTx->channel = dmaTxChannelSpec->channel;
dmaInit(dmaTxIdentifier, OWNER_SPI_MOSI, device + 1);
break;
}
@ -564,16 +566,15 @@ void spiInitBusDMA()
break;
}
#endif
bus->dmaRxChannel = dmaRxChannelSpec->channel;
bus->dmaRx = dmaGetDescriptorByIdentifier(dmaRxIdentifier);
bus->dmaRx->stream = DMA_DEVICE_INDEX(dmaRxIdentifier);
bus->dmaRx->channel = dmaRxChannelSpec->channel;
dmaInit(dmaRxIdentifier, OWNER_SPI_MISO, device + 1);
break;
}
}
if (dmaTxIdentifier && dmaRxIdentifier) {
bus->dmaTx = dmaGetDescriptorByIdentifier(dmaTxIdentifier);
bus->dmaRx = dmaGetDescriptorByIdentifier(dmaRxIdentifier);
// Ensure streams are disabled
spiInternalResetStream(bus->dmaRx);
spiInternalResetStream(bus->dmaTx);
@ -586,6 +587,10 @@ void spiInitBusDMA()
dmaSetHandler(dmaRxIdentifier, spiRxIrqHandler, NVIC_PRIO_SPI_DMA, 0);
bus->useDMA = true;
} else {
// Disassociate channels from bus
bus->dmaRx = (dmaChannelDescriptor_t *)NULL;
bus->dmaTx = (dmaChannelDescriptor_t *)NULL;
}
}
}