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Move DMA IRQ acknowledge to before the callback as it's edge triggered (#14514)

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* Remove superfluous comments

* Move DMA IRQ acknowledge to before the callback as it's edge triggered
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Steve Evans 2025-07-06 15:59:37 +01:00 • committed by GitHub
parent 35aac9f924
commit 01329e3350
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2 changed files with 9 additions and 27 deletions
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16
src/platform/PICO/dma_pico.c
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@ -63,21 +63,23 @@ void dma_irq_handler(bool isIrq1)
// channel equates to index in the dmaDescriptors array
for (uint8_t channel = 0; channel < DMA_LAST_HANDLER; channel++) {
if (status & (1u << channel)) {
uint8_t index = DMA_CHANNEL_TO_INDEX(channel);
// Call the handler if it is set
if (dmaDescriptors[index].irqHandlerCallback) {
dmaDescriptors[index].irqHandlerCallback(&dmaDescriptors[index]);
}
// Acknowledge the interrupt for this channel
// Acknowledge the interrupt for this channel as it is edge, not
// level triggered and the callback may trigger another DMA
if (isIrq1) {
dma_channel_acknowledge_irq1(channel);
} else {
dma_channel_acknowledge_irq0(channel);
}
uint8_t index = DMA_CHANNEL_TO_INDEX(channel);
// Call the handler if it is set
if (dmaDescriptors[index].irqHandlerCallback) {
dmaDescriptors[index].irqHandlerCallback(&dmaDescriptors[index]);
}
}
}
}
void dma_irq0_handler(void)
{
dma_irq_handler(false);