#include "spi.h"

void WIZ_SPI_Init(void)
{
	// 初始化GPIO管脚和SPI的参数设置：建立SPI和GPIO的初始化结构体
	SPI_InitTypeDef   SPI_InitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
	
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; 				
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;		
  GPIO_Init(GPIOB, &GPIO_InitStructure);						
  GPIO_SetBits(GPIOB, GPIO_Pin_12);	
	
		/* GPIO Config -------------------------------------------------------------*/
		RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
		
		GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
		GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
		GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
		GPIO_Init(GPIOB, &GPIO_InitStructure);
		
	  /* SPI Config -------------------------------------------------------------*/
		RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 , ENABLE);
		
	  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
	  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
	  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
	  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
	  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
	  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
	  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
	  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
	  SPI_InitStructure.SPI_CRCPolynomial = 7;

	  SPI_Init(SPI2, &SPI_InitStructure);
	  
	  /* Enable SPI */
	  SPI_Cmd(SPI2, ENABLE);
}

// Connected to Data Flash
void WIZ_CS(uint8_t val)
{
	if (val == LOW) 
	{
   		GPIO_ResetBits(GPIOB, GPIO_Pin_12); 	// GPIOB的WIZ_SCS（GPIO_Pin_12）引脚清零拉低
	}
	else if (val == HIGH)
	{
   		GPIO_SetBits(GPIOB, GPIO_Pin_12); 		// GPIOB的WIZ_SCS（GPIO_Pin_12）引脚置1拉高
	}
}


uint8_t SPI2_SendByte(uint8_t byte)
{
	  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);  	// 等待发送区空
    
	  SPI_I2S_SendData(SPI2, byte);									   									// 发送一个字节
          
	  while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); 	// 等待接收完一个字节
    
	  return SPI_I2S_ReceiveData(SPI2);								   								// 返回收到的数据 
}