#include "stm32f0xx.h"

void SPI2_Int()
{
/*	
    SPI_InitTypeDef  SPI_InitStruct;
    
    SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;//全双工模式
    SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
    SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;//第一个边沿
    SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;//上升沿捕获
    SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16; // 6MHz
    SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_InitStruct.SPI_CRCPolynomial = 7;
    SPI_Init(SPI2,&SPI_InitStruct);
    
    SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF);
    SPI_Cmd(SPI2, ENABLE );
*/
}

/*!
 * @brief Sends txBuffer and receives rxBuffer
 *
 * @param [IN] txBuffer Byte to be sent
 * @param [OUT] rxBuffer Byte to be sent
 * @param [IN] size Byte to be sent
 */
#define TIMEOUT 50
uint8_t SpiInOut( uint8_t txBuffer)
{
 /*   
      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
      SPI_SendData8(SPI2, txBuffer);
    
      while( SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);//当接收buffer为非空时退出
      return SPI_ReceiveData8(SPI2);
      
  */ 
	
		int timeout_cnt= 0;
	uint8_t value;
	while (LL_SPI_IsActiveFlag_TXE(SPI1) == RESET)	{timeout_cnt++; if (timeout_cnt>TIMEOUT) break;	}
    	LL_SPI_TransmitData8(SPI1,txBuffer);
	timeout_cnt= 0; while (LL_SPI_IsActiveFlag_BSY(SPI1) == SET)	{timeout_cnt++; if (timeout_cnt>TIMEOUT) break;	}
	timeout_cnt= 0; while (LL_SPI_IsActiveFlag_RXNE(SPI1) == RESET)	{	timeout_cnt++; if (timeout_cnt>TIMEOUT) break;}
	value = LL_SPI_ReceiveData8( SPI1);	
	
	return value;
}

void SpiIn( uint8_t *txBuffer, uint16_t size )
{
	
    uint16_t i;
    
    for(i=0;i<size;i++)
    {
      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
      LL_SPI_TransmitData8(SPI1,txBuffer[i]);
      while( LL_SPI_IsActiveFlag_RXNE(SPI1) == RESET);//当接收buffer为非空时退出
      LL_SPI_ReceiveData8( SPI1);	
    }
		
}