HC32F460 ADC DMA

只看该作者 · 2021-4-28 23:17

我想问一下，我先用8个ADC 通道填充一个data[N][M] 的数组, N=256, M=8 通道，发现只能填充data[0][0]-到data[0][M]，有数，其他都没数据。我这样设置对吗？stcDmaCfg.u16BlockSize    = ADC1_SA_CHANNEL_COUNT;//一次8个数据 ADC1_SA_CHANNEL_COUNT= 8
   stcDmaCfg.u16TransferCnt = 0;
   stcDmaCfg.u32SrcAddr = (uint32_t)(&M4_ADC1->DR0);
   stcDmaCfg.u32DesAddr = (uint32_t)dma_ad_val;//dma_ad_val[256][8]
   stcDmaCfg.u16DesRptSize = ADC1_SA_CHANNEL_COUNT;
   stcDmaCfg.u16SrcRptSize = ADC1_SA_CHANNEL_COUNT;
   stcDmaCfg.u32DmaLlp = 0u;
   stcDmaCfg.stcSrcNseqCfg.u16Cnt    = 0u;
   stcDmaCfg.stcSrcNseqCfg.u32Offset = 0u;
   stcDmaCfg.stcDesNseqCfg.u16Cnt    = 0u;
   stcDmaCfg.stcDesNseqCfg.u32Offset = 0u;
   stcDmaCfg.stcDmaChCfg.enSrcInc    = AddressIncrease;
   stcDmaCfg.stcDmaChCfg.enDesInc    = AddressIncrease;
   stcDmaCfg.stcDmaChCfg.enSrcRptEn  = Enable;
   stcDmaCfg.stcDmaChCfg.enDesRptEn  = Enable;
   stcDmaCfg.stcDmaChCfg.enSrcNseqEn = Disable;
   stcDmaCfg.stcDmaChCfg.enDesNseqEn = Disable;
   stcDmaCfg.stcDmaChCfg.enTrnWidth  = Dma16Bit;
   stcDmaCfg.stcDmaChCfg.enLlpEn    = Disable;
/* Enable DMA interrupt. */
   stcDmaCfg.stcDmaChCfg.enIntEn    = Enable;

只看该作者 · 2021-5-11 14:21

stcDmaCfg.u16DesRptSize = ADC1_SA_CHANNEL_COUNT*256; 建议着这么设置；

只看该作者 · 2021-8-17 20:19

超过了1024