c6ec22c4c8
This was oringinally contributed/reported/discussed/patched by Philippe Retornaz (EPFL) but it's implemented in a more configurable fashion here.
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/**
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* \file
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* DMA driver ISRs
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* \author
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* Original: Martti Huttunen <martti@sensinode.com>
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* Port: Zach Shelby <zach@sensinode.com>
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*
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* DMA interrupt routines, must be stored in HOME bank
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*/
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#include <stdio.h>
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#include "contiki.h"
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#include "dev/dma.h"
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#include "cc253x.h"
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#if DMA_ON
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extern struct process * dma_callback[DMA_CHANNEL_COUNT];
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#endif
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/*---------------------------------------------------------------------------*/
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#ifdef HAVE_RF_DMA
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extern void rf_dma_callback_isr(void);
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#endif
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#ifdef SPI_DMA_RX
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extern void spi_rx_dma_callback(void);
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#endif
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/*---------------------------------------------------------------------------*/
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/**
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* DMA interrupt service routine.
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*
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* if callback defined a poll is made to that process
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*/
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/* Avoid referencing bits, we don't call code which use them */
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#pragma save
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#if CC_CONF_OPTIMIZE_STACK_SIZE
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#pragma exclude bits
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#endif
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void
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dma_isr(void) __interrupt (DMA_VECTOR)
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{
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#if DMA_ON
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uint8_t i;
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#endif
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EA=0;
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DMAIF = 0;
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#ifdef HAVE_RF_DMA
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if((DMAIRQ & 1) != 0) {
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DMAIRQ &= ~1;
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DMAARM=0x81;
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rf_dma_callback_isr();
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}
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#endif
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#ifdef SPI_DMA_RX
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if((DMAIRQ & 0x08) != 0) {
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DMAIRQ &= ~(1 << 3);
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spi_rx_dma_callback();
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}
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#endif
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#if DMA_ON
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for(i = 0; i < DMA_CHANNEL_COUNT; i++) {
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if((DMAIRQ & (1 << i)) != 0) {
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DMAIRQ &= ~(1 << i);
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if(dma_callback[i] != 0) {
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process_poll(dma_callback[i]);
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}
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}
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}
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#endif
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EA = 1;
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}
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#pragma restore
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/*---------------------------------------------------------------------------*/
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