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Add support for SPI DMA

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This commit is contained in:
Steve Evans 2025-06-23 20:43:26 +01:00
parent aeda0905c5
commit 01e9901459
5 changed files with 110 additions and 38 deletions
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35
src/platform/PICO/dma_pico.c
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@ -34,9 +34,6 @@
#include "hardware/dma.h"
#include "hardware/irq.h"
volatile bool dma_irq0_handler_registered = false;
volatile bool dma_irq1_handler_registered = false;
dmaChannelDescriptor_t dmaDescriptors[DMA_LAST_HANDLER] = {
DEFINE_DMA_CHANNEL(DMA_CH0_HANDLER),
DEFINE_DMA_CHANNEL(DMA_CH1_HANDLER),
@ -103,7 +100,7 @@ dmaIdentifier_e dmaGetFreeIdentifier(void)
void dmaSetHandler(dmaIdentifier_e identifier, dmaCallbackHandlerFuncPtr callback, uint32_t priority, uint32_t userParam)
{
if (identifier < DMA_CH0_HANDLER || identifier > DMA_LAST_HANDLER) {
if (identifier < DMA_FIRST_HANDLER || identifier > DMA_LAST_HANDLER) {
return; // Invalid identifier
}
@ -129,22 +126,24 @@ void dmaSetHandler(dmaIdentifier_e identifier, dmaCallbackHandlerFuncPtr callbac
const int index = DMA_IDENTIFIER_TO_INDEX(identifier);
const uint32_t channel = dmaDescriptors[index].channel;
static bool dma_irqN_handler_registered[2];
if (!dma_irqN_handler_registered[core]) {
// Register the DMA IRQ handler if needed
dmaDescriptors[index].irqN = core ? DMA_IRQ_1_IRQn : DMA_IRQ_0_IRQn;
irq_handler_t irq_handler = core ? dma_irq1_handler : dma_irq0_handler;
irq_set_exclusive_handler(dmaDescriptors[index].irqN, irq_handler);
irq_set_enabled(dmaDescriptors[index].irqN, true);
dma_irqN_handler_registered[core] = true;
}
if (core) {
// Core 1 uses DMA IRQ1
if (!dma_irq1_handler_registered) {
irq_set_exclusive_handler(DMA_IRQ_1, dma_irq1_handler);
irq_set_enabled(DMA_IRQ_1, true);
dma_channel_set_irq1_enabled(channel, true);
dma_irq1_handler_registered = true;
}
dma_channel_set_irq1_enabled(channel, true);
} else {
// Core 0 uses DMA IRQ0
if (!dma_irq0_handler_registered) {
irq_set_exclusive_handler(DMA_IRQ_0, dma_irq0_handler);
irq_set_enabled(DMA_IRQ_0, true);
dma_channel_set_irq0_enabled(channel, true);
dma_irq0_handler_registered = true;
}
dma_channel_set_irq0_enabled(channel, true);
}
dmaDescriptors[index].irqHandlerCallback = callback;