Drv_spi.c

#include "Drv_spi.h"

void Drv_SPI2_init(void)
{
	SPI_InitTypeDef SPI_InitStructure; 
	GPIO_InitTypeDef GPIO_InitStructure;
		
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);	/* Initialize GPIOB clock */
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);	/* Initialize SPI2 clock */
	
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;

    /*!< SPI SCK pin configuration */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /*!< SPI MOSI pin configuration */
    GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_15;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /*!< SPI MISO pin configuration */
    GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_14;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; 		/* set SPI_Direc 2Lines_FullDuplex */
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master; 
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; 
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; 
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; 
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; 
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; 
    SPI_InitStructure.SPI_CRCPolynomial = 7;
    SPI_Init(SPI2, &SPI_InitStructure);
    /* Enable SPI2 */
    SPI_Cmd(SPI2, ENABLE);
}

u8 Drv_SPI2_RW(u8 dat)
{
    while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);			//wait to transimit
    SPI_I2S_SendData(SPI2, dat);
    while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);		//wait to receive
    return SPI_I2S_ReceiveData(SPI2);
}

/* transimit size data from pData pointer buffer */
void Drv_SPI2_Transmit(uint8_t *pData, uint16_t Size)
{
    for(uint16_t i=0; i<Size; i++)
    {
        Drv_SPI2_RW(pData[i]);
    }
}

/* receive size data to pData pointer buffer */
void Drv_SPI2_Receive(uint8_t *pData, uint16_t Size)
{
    for(uint16_t i=0; i<Size; i++)
    {
        pData[i] = Drv_SPI2_RW(0);
    }
}