H730硬件三角函数使用DMA方式，推荐开启突发传输，性能提升一倍多

eric2013

备份代码如下：

1. void HAL_CORDIC_MspInit(CORDIC_HandleTypeDef* hcordic)
   
2. {
   
3.   if(hcordic->Instance==CORDIC)
   
4.   {
   
5.     /* Peripheral clock enable */
   
6.     __HAL_RCC_CORDIC_CLK_ENABLE();
   
7.   
   
8.     /* CORDIC DMA Init */
   
9.     /* CORDIC_WRITE Init */
   
10.     hdma_cordic_write.Instance = DMA1_Stream0;
    
11.     hdma_cordic_write.Init.Request = DMA_REQUEST_CORDIC_WRITE;
    
12.     hdma_cordic_write.Init.Direction = DMA_MEMORY_TO_PERIPH;
    
13.     hdma_cordic_write.Init.PeriphInc = DMA_PINC_DISABLE;
    
14.     hdma_cordic_write.Init.MemInc = DMA_MINC_ENABLE;
    
15.     hdma_cordic_write.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
    
16.     hdma_cordic_write.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
    
17.     hdma_cordic_write.Init.Mode = DMA_NORMAL;
    
18.     hdma_cordic_write.Init.Priority = DMA_PRIORITY_LOW;
    
19.     hdma_cordic_write.Init.FIFOMode            = DMA_FIFOMODE_ENABLE;
    
20.     hdma_cordic_write.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
    
21.     hdma_cordic_write.Init.MemBurst            = DMA_MBURST_INC4;
    
22.     hdma_cordic_write.Init.PeriphBurst         = DMA_PBURST_SINGLE;   
    
23.     if (HAL_DMA_Init(&hdma_cordic_write) != HAL_OK)
    
24.     {
    
25. 
    
26.     }
    
27. 
    
28.     __HAL_LINKDMA(hcordic,hdmaIn,hdma_cordic_write);
    
29. 
    
30.     /* CORDIC_READ Init */
    
31.     hdma_cordic_read.Instance = DMA1_Stream1;
    
32.     hdma_cordic_read.Init.Request = DMA_REQUEST_CORDIC_READ;
    
33.     hdma_cordic_read.Init.Direction = DMA_PERIPH_TO_MEMORY;
    
34.     hdma_cordic_read.Init.PeriphInc = DMA_PINC_DISABLE;
    
35.     hdma_cordic_read.Init.MemInc = DMA_MINC_ENABLE;
    
36.     hdma_cordic_read.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
    
37.     hdma_cordic_read.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
    
38.     hdma_cordic_read.Init.Mode = DMA_NORMAL;
    
39.     hdma_cordic_read.Init.Priority = DMA_PRIORITY_LOW;
    
40.     hdma_cordic_read.Init.FIFOMode            = DMA_FIFOMODE_ENABLE;
    
41.     hdma_cordic_read.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
    
42.     hdma_cordic_read.Init.MemBurst            = DMA_MBURST_INC4;
    
43.     hdma_cordic_read.Init.PeriphBurst         = DMA_PBURST_SINGLE;  
    
44.     if (HAL_DMA_Init(&hdma_cordic_read) != HAL_OK)
    
45.     {
    
46. 
    
47.     }
    
48. 
    
49.     __HAL_LINKDMA(hcordic,hdmaOut,hdma_cordic_read);
    
50. 
    
51.   }
    
52. 
    
53. }

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