HC32F460 SPI 数据缓存使用

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已于 2022-04-27 22:25:11 修改

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分类专栏： STM32MP1 C HC32 文章标签： c语言

于 2022-04-27 22:23:17 首次发布

本文链接：https://blog.youkuaiyun.com/qq_34327726/article/details/124462348

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在这里插入图片描述

初始化配置

stcSpiInit.enFrameNumber = SpiFrameNumber3;

define

//#define SpiFrameNUM_2
#define SpiFrameNUM_3
//#define SpiFrameNUM_4

读写数据

while (u8RxIndex < SPI_TX_RX_bufferlen )
{
    /* Wait tx buffer empty */
    while (Reset == SPI_GetFlag(SPI_UNIT, SpiFlagSendBufferEmpty))
    {
    }
    /* Send data */
				
    SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex]);
				#ifdef SpiFrameNUM_2
				SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex+1]);	
				#endif
				#ifdef SpiFrameNUM_3
				SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex+1]);	
				SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex+2]);							
				#endif						
				#ifdef SpiFrameNUM_4	
				SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex+1]);							
				SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex+2]);	
				SPI_SendData32(SPI_UNIT, (uint32_t)SPI1_TxBuffer_default[u8RxIndex+3]);		
    #endif						
    /* Wait rx buffer full */
    while (Reset == SPI_GetFlag(SPI_UNIT, SpiFlagReceiveBufferFull))
    {
    }
    /* Receive data */
    SPI1_RxBuffer[u8RxIndex]   = (int32_t)(SPI_ReceiveData32(SPI_UNIT));
				#ifdef SpiFrameNUM_2						
				SPI1_RxBuffer[u8RxIndex+1] = (int32_t)(SPI_ReceiveData32(SPI_UNIT));
				#endif
				#ifdef SpiFrameNUM_3
				SPI1_RxBuffer[u8RxIndex+1] = (int32_t)(SPI_ReceiveData32(SPI_UNIT));
				SPI1_RxBuffer[u8RxIndex+2] = (int32_t)(SPI_ReceiveData32(SPI_UNIT));							
				#endif
				#ifdef SpiFrameNUM_4	
				SPI1_RxBuffer[u8RxIndex+1] = (int32_t)(SPI_ReceiveData32(SPI_UNIT));
				SPI1_RxBuffer[u8RxIndex+2] = (int32_t)(SPI_ReceiveData32(SPI_UNIT));							
				SPI1_RxBuffer[u8RxIndex+3] = (int32_t)(SPI_ReceiveData32(SPI_UNIT));
				#endif

				u8RxIndex++;
				#ifdef SpiFrameNUM_2						
				u8RxIndex=u8RxIndex+1;//先自加了1  所以只要再加1
				#endif
				#ifdef SpiFrameNUM_3
				u8RxIndex=u8RxIndex+2;
				#endif
				#ifdef SpiFrameNUM_4	
				u8RxIndex=u8RxIndex+3;
				#endif
}