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标题:
edma3中断只能进去一次
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作者:
silent123
时间:
2015-4-22 22:01
标题:
edma3中断只能进去一次
使用mcsdk中的edma3lld库写的edma3驱动，在omapl138的dsp核运行，但是中断函数只能进去一次，路过的朋友帮忙看看，感谢万分。代码如下：
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#define PING_PONG_ACNT 1
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#define PING_PONG_BCNT 8*32*40
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//#define PING_PONG_BCNT 1
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#define PING_PONG_CCNT 1
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#define MCASP_BASEADDR 0x01D00000
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#define Mcasp_RXEVENTQUE (0u)
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/* OPT Field specific defines */
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#define OPT_SYNCDIM_SHIFT (0x00000002u)
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#define OPT_TCC_MASK (0x0003F000u)
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#define OPT_TCC_SHIFT (0x0000000Cu)
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#define OPT_ITCINTEN_SHIFT (0x00000015u)
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#define OPT_TCINTEN_SHIFT (0x00000014u)
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char ping_buffer[PING_PONG_BCNT];
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char pong_buffer[PING_PONG_BCNT];
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static void ys_edma3_init()
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{
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EDMA3_DRV_PaRAMRegs paramSet = {0,0,0,0,0,0,0,0,0,0,0,0};
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EDMA3_DRV_Result result = EDMA3_DRV_SOK;
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EDMA3_DRV_Handle hEdma;
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uint32_t chId = 0;
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uint32_t tcc = 0;
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print2arm("edma3 driver init...",0);
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hEdma = edma3init(0,&result);
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if(hEdma)
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{
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print2arm("edma3init() Passed.",0);
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}
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else
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{
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print2arm("edma3init() Failed.",0);
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}
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if (result == EDMA3_DRV_SOK)
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{
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result = EDMA3_DRV_requestChannel (hEdma, &chId, &tcc,
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(EDMA3_RM_EventQueue)0,
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&edma3_isr, NULL);
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}
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if(result == EDMA3_DRV_SOK)
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{
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paramSet.srcBIdx = 0;
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paramSet.destBIdx = 1;
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paramSet.srcCIdx = 0;
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paramSet.destCIdx = 0;
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paramSet.aCnt = PING_PONG_ACNT;
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paramSet.bCnt = PING_PONG_BCNT;
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paramSet.cCnt = PING_PONG_CCNT;
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/* For AB-synchronized transfers, BCNTRLD is not used. */
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paramSet.bCntReload = PING_PONG_BCNT;
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/* Src in constant mode Dest in INCR modes */
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paramSet.opt &= 0xFFFFFFFDu;
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//paramSet.opt &= 0xFFFFFFFCu;
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/* Program the TCC */
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paramSet.opt |= ((tcc << OPT_TCC_SHIFT) & OPT_TCC_MASK);
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/* Enable Intermediate & Final transfer completion interrupt */
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paramSet.opt |= (1 << OPT_ITCINTEN_SHIFT);
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paramSet.opt |= (1 << OPT_TCINTEN_SHIFT);
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/* AB Sync Transfer Mode */
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paramSet.opt |= (1 << OPT_SYNCDIM_SHIFT);
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/* Program the source and dest addresses for master DMA channel */
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paramSet.srcAddr = (uint32_t)(MCASP_BASEADDR+0X029C);
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paramSet.destAddr = (uint32_t)(ping_buffer);
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/* Write to the master DMA channel first. */
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result = EDMA3_DRV_setPaRAM(hEdma, chId, ¶mSet);
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}
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result = EDMA3_DRV_enableTransfer(hEdma,chId,EDMA3_DRV_TRIG_MODE_EVENT);
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if(result == EDMA3_DRV_SOK)
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{
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print2arm("edma3 driver init success.",0);
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}
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}
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EDMA3的配置就这个函数，是由MCASP接收事件触发EDMA3传输的，中断函数edma3_isr只能进去一次，请大家帮忙看看哪里有问题。。。
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作者:
Lewis
时间:
2015-4-24 10:47
每次DMA传输完成后都要再次使能传输
作者:
silent123
时间:
2015-4-29 23:25
Lewis 发表于 2015-4-24 10:47
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每次DMA传输完成后都要再次使能传输
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原来是这样，我明天去试试，谢谢了！
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