Diff: SPI_DMAInit.h

Revision:

0:ce10b2e08479

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_DMAInit.h	Mon Apr 04 02:05:59 2016 +0000
@@ -0,0 +1,52 @@
+#include "mbed.h"
+
+ 
+
+DMA_HandleTypeDef    SPIDma;
+SPI_HandleTypeDef   spi1;
+
+
+void spi_Init() {
+    
+    
+    __DMA2_CLK_ENABLE();
+    SPIDma.Instance = DMA2_Stream3;
+    SPIDma.Init.Channel = DMA_CHANNEL_3;
+    SPIDma.Init.Direction = DMA_MEMORY_TO_PERIPH;
+    SPIDma.Init.PeriphInc = DMA_PINC_DISABLE;
+    SPIDma.Init.MemInc = DMA_MINC_ENABLE;
+    SPIDma.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;  // 8 bit
+    SPIDma.Init.MemDataAlignment = DMA_PDATAALIGN_BYTE;     // 8 bit
+    SPIDma.Init.Mode =   DMA_CIRCULAR;
+    SPIDma.Init.Priority = DMA_PRIORITY_HIGH;
+    SPIDma.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
+    HAL_DMA_Init(&SPIDma);
+    
+    // SPI pin
+    __GPIOA_CLK_ENABLE();
+    GPIO_InitTypeDef spipins;
+    spipins.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
+    spipins.Mode = GPIO_MODE_AF_PP;
+    spipins.Pull = GPIO_PULLDOWN;
+    spipins.Speed = GPIO_SPEED_HIGH;
+    spipins.Alternate =  GPIO_AF5_SPI1;
+    HAL_GPIO_Init(GPIOA, &spipins);
+    
+ // SPI
+   __SPI1_CLK_ENABLE();
+    spi1.Init.Mode = SPI_MODE_MASTER;
+    spi1.Init.Direction = SPI_DIRECTION_2LINES;
+    spi1.Init.DataSize = SPI_DATASIZE_8BIT;
+    spi1.Init.CLKPolarity= SPI_POLARITY_LOW;//パリティビット無し
+    spi1.Init.CLKPhase = SPI_PHASE_1EDGE;    // transmit only mode 送信のみ
+    spi1.Init.NSS = SPI_NSS_SOFT; 
+    spi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2; 
+    spi1.Init.FirstBit = SPI_FIRSTBIT_MSB ;
+    spi1.Init.CRCPolynomial = 7;
+
+    spi1.Instance = SPI1;
+    spi1.hdmatx = &SPIDma;
+   HAL_SPI_Init(&spi1);
+     
+    
+}