dma_intr.c

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00001 /**
00002  * \file
00003  *         DMA driver ISRs
00004  * \author
00005  *         Original: Martti Huttunen <martti@sensinode.com>
00006  *         Port: Zach Shelby <zach@sensinode.com>
00007  *
00008  *         DMA interrupt routines, must be stored in HOME bank
00009  */
00010 
00011 #include <stdio.h>
00012 
00013 #include "contiki.h"
00014 
00015 #include "dev/dma.h"
00016 #include "cc2430_sfr.h"
00017 #include "banked.h"
00018 
00019 extern struct process * dma_callback[4];
00020 
00021 /*---------------------------------------------------------------------------*/
00022 #ifdef HAVE_RF_DMA
00023 extern void rf_dma_callback_isr(void);
00024 #endif
00025 #ifdef SPI_DMA_RX
00026 extern void spi_rx_dma_callback(void);
00027 #endif
00028 /*---------------------------------------------------------------------------*/
00029 /**
00030  * DMA interrupt service routine.
00031  *
00032  * if callback defined a poll is made to that process
00033  */
00034 void
00035 dma_ISR(void) __interrupt (DMA_VECTOR)
00036 {
00037 #ifdef HAVE_DMA
00038   uint8_t i;
00039 #endif
00040   EA=0;
00041 #ifdef HAVE_RF_DMA
00042   if((DMAIRQ & 1) != 0) {
00043     DMAIRQ &= ~1;
00044     DMAARM=0x81;
00045     rf_dma_callback_isr();
00046   }
00047 #endif
00048 #ifdef SPI_DMA_RX
00049   if((DMAIRQ & 0x08) != 0) {
00050     DMAIRQ &= ~(1 << 3);
00051     spi_rx_dma_callback();
00052   }
00053 #endif
00054 #ifdef HAVE_DMA
00055   for(i = 0; i < 4; i++) {
00056     if((DMAIRQ & (1 << i + 1)) != 0) {
00057       DMAIRQ &= ~(1 << i+1);
00058       if(dma_callback[i] != 0) {
00059         process_poll(dma_callback[i]);
00060       }
00061     }
00062   }
00063 #endif
00064   IRCON_DMAIF = 0;
00065   EA = 1;
00066 }
00067 /*---------------------------------------------------------------------------*/