edma3中断只能进去一次

silent123 · 发表于 2015-4-22 22:01:06

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：
#define  PING_PONG_ACNT       1
#define  PING_PONG_BCNT       8*32*40
//#define  PING_PONG_BCNT    1
#define  PING_PONG_CCNT       1
#define  MCASP_BASEADDR       0x01D00000
#define  Mcasp_RXEVENTQUE       (0u)

/* OPT Field specific defines */
#define OPT_SYNCDIM_SHIFT                (0x00000002u)
#define OPT_TCC_MASK                      (0x0003F000u)
#define OPT_TCC_SHIFT                      (0x0000000Cu)
#define OPT_ITCINTEN_SHIFT                (0x00000015u)
#define OPT_TCINTEN_SHIFT                (0x00000014u)

char ping_buffer[PING_PONG_BCNT];
char pong_buffer[PING_PONG_BCNT];

static void ys_edma3_init()
{
EDMA3_DRV_PaRAMRegs paramSet = {0,0,0,0,0,0,0,0,0,0,0,0};
EDMA3_DRV_Result result = EDMA3_DRV_SOK;
EDMA3_DRV_Handle hEdma;
uint32_t chId = 0;
uint32_t tcc = 0;

print2arm("edma3 driver init...",0);

hEdma = edma3init(0,&result);
if(hEdma)
{
print2arm("edma3init() Passed.",0);
}
else
{
print2arm("edma3init() Failed.",0);
}

if (result == EDMA3_DRV_SOK)
{
result = EDMA3_DRV_requestChannel (hEdma, &chId, &tcc,
                        (EDMA3_RM_EventQueue)0,
                              &edma3_isr, NULL);
}

if(result == EDMA3_DRV_SOK)
{
paramSet.srcBIdx = 0;
paramSet.destBIdx = 1;
paramSet.srcCIdx = 0;
paramSet.destCIdx = 0;
paramSet.aCnt    = PING_PONG_ACNT;
paramSet.bCnt    = PING_PONG_BCNT;
paramSet.cCnt    = PING_PONG_CCNT;

/* For AB-synchronized transfers, BCNTRLD is not used. */
paramSet.bCntReload = PING_PONG_BCNT;

/* Src in constant mode Dest in INCR modes */
paramSet.opt &= 0xFFFFFFFDu;
//paramSet.opt &= 0xFFFFFFFCu;

/* Program the TCC */
paramSet.opt |= ((tcc << OPT_TCC_SHIFT) & OPT_TCC_MASK);

/* Enable Intermediate & Final transfer completion interrupt */
paramSet.opt |= (1 << OPT_ITCINTEN_SHIFT);
paramSet.opt |= (1 << OPT_TCINTEN_SHIFT);

/* AB Sync Transfer Mode */
paramSet.opt |= (1 << OPT_SYNCDIM_SHIFT);

/* Program the source and dest addresses for master DMA channel */
paramSet.srcAddr = (uint32_t)(MCASP_BASEADDR+0X029C);
paramSet.destAddr = (uint32_t)(ping_buffer);

/* Write to the master DMA channel first. */
result = EDMA3_DRV_setPaRAM(hEdma, chId, &paramSet);
}

result = EDMA3_DRV_enableTransfer(hEdma,chId,EDMA3_DRV_TRIG_MODE_EVENT);

if(result == EDMA3_DRV_SOK)
{
print2arm("edma3 driver init success.",0);
}
}

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。。。

Lewis · 发表于 2015-4-24 10:47:00

每次DMA传输完成后都要再次使能传输

silent123 · 发表于 2015-4-29 23:25:56

Lewis 发表于 2015-4-24 10:47
& v- j' D( i8 ?! G8 q8 v每次DMA传输完成后都要再次使能传输

原来是这样，我明天去试试，谢谢了！

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