#include "stm32f0xx.h"
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void SPI2_Int()
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{
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/*
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SPI_InitTypeDef SPI_InitStruct;
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SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//全双工模式
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SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
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SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
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SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;//第一个边沿
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SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;//上升沿捕获
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SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
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SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16; // 6MHz
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SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
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SPI_InitStruct.SPI_CRCPolynomial = 7;
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SPI_Init(SPI2,&SPI_InitStruct);
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SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF);
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SPI_Cmd(SPI2, ENABLE );
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*/
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}
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/*!
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* @brief Sends txBuffer and receives rxBuffer
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*
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* @param [IN] txBuffer Byte to be sent
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* @param [OUT] rxBuffer Byte to be sent
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* @param [IN] size Byte to be sent
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*/
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#define TIMEOUT 50
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uint8_t SpiInOut( uint8_t txBuffer)
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{
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/*
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while( SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);//当发送buffer为空时(说明上一次数据已复制到移位寄存器中)退出,这时可以往buffer里面写数据
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SPI_SendData8(SPI2, txBuffer);
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while( SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);//当接收buffer为非空时退出
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return SPI_ReceiveData8(SPI2);
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*/
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int timeout_cnt= 0;
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uint8_t value;
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while (LL_SPI_IsActiveFlag_TXE(SPI1) == RESET) {timeout_cnt++; if (timeout_cnt>TIMEOUT) break; }
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LL_SPI_TransmitData8(SPI1,txBuffer);
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timeout_cnt= 0; while (LL_SPI_IsActiveFlag_BSY(SPI1) == SET) {timeout_cnt++; if (timeout_cnt>TIMEOUT) break; }
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timeout_cnt= 0; while (LL_SPI_IsActiveFlag_RXNE(SPI1) == RESET) { timeout_cnt++; if (timeout_cnt>TIMEOUT) break;}
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value = LL_SPI_ReceiveData8( SPI1);
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return value;
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}
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void SpiIn( uint8_t *txBuffer, uint16_t size )
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{
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uint16_t i;
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for(i=0;i<size;i++)
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{
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while( LL_SPI_IsActiveFlag_TXE(SPI1) == RESET);//当发送buffer为空时(说明上一次数据已复制到移位寄存器中)退出,这时可以往buffer里面写数据
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LL_SPI_TransmitData8(SPI1,txBuffer[i]);
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while( LL_SPI_IsActiveFlag_RXNE(SPI1) == RESET);//当接收buffer为非空时退出
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LL_SPI_ReceiveData8( SPI1);
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}
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}
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