vgkitboard_297s/radio/spi.c

#include "spi.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_spi.h"
#include "stm32f10x.h"

#if !defined(SPI_HARD)   
void RF_SPI_SCK_H(void)
{
    GPIO_WriteBit(RF_SPI_SCK_Port, RF_SPI_SCK_IO, BOARD_PIN_H);
}
void RF_SPI_SCK_L(void)
{
    GPIO_WriteBit(RF_SPI_SCK_Port, RF_SPI_SCK_IO, BOARD_PIN_L);
}
void RF_SPI_MISO_H(void)
{
    GPIO_WriteBit(RF_SPI_MISO_Port, RF_SPI_MISO_IO, BOARD_PIN_H);
}
void RF_SPI_MISO_L(void)
{
    GPIO_WriteBit(RF_SPI_MISO_Port, RF_SPI_MISO_IO, BOARD_PIN_L);
}
void RF_SPI_MISO_SETMODE(GPIOMode_TypeDef mode)
{
    GPIO_InitTypeDef  GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = RF_SPI_MISO_IO;           
    GPIO_InitStructure.GPIO_Mode = mode;     
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;      
    GPIO_Init(RF_SPI_MISO_Port, &GPIO_InitStructure);
}

uint8_t READ_RF_SPI_MISO(void)
{
    return GPIO_ReadInputDataBit(RF_SPI_MISO_Port, RF_SPI_MISO_IO);
}
#endif

void RF_SPI_NSS_H(void)
{
    GPIO_WriteBit(RF_SPI_NSS_Port, RF_SPI_NSS_IO, BOARD_PIN_H);
}
void RF_SPI_NSS_L(void)
{
    GPIO_WriteBit(RF_SPI_NSS_Port, RF_SPI_NSS_IO, BOARD_PIN_L);
}

void spi_init(void)
{
    GPIO_InitTypeDef  GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = RF_SPI_MISO_IO;           
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;     
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;      
    GPIO_Init(RF_SPI_MISO_Port, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = RF_SPI_SCK_IO;            
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;      
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;      
    GPIO_Init(RF_SPI_SCK_Port, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = RF_SPI_NSS_IO;            
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;      
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;      
    GPIO_Init(RF_SPI_NSS_Port, &GPIO_InitStructure);


    RF_SPI_NSS_H();
}
void SpiWrite(uint8_t byteToWrite)
{
    uint8_t i;  
    __set_PRIMASK(1);   //全局中断关闭
    RF_SPI_MISO_SETMODE(GPIO_Mode_Out_PP);
    RF_SPI_SCK_L();
    for(i=0; i<8; i++)
    {
        if(byteToWrite & 0x80)
        {
          RF_SPI_MISO_H();
        }
        else
        {
          RF_SPI_MISO_L();
        } 
        RF_SPI_SCK_H();
        byteToWrite <<= 1;
        RF_SPI_SCK_L();
    }
    __set_PRIMASK(0);   //全局中断打开
}
uint8_t SpiRead(void)
{
    uint8_t i, temp;
    
    temp = 0;   
    __set_PRIMASK(1);   //全局中断关闭
    RF_SPI_MISO_SETMODE(GPIO_Mode_IN_FLOATING);
    RF_SPI_SCK_L();
    for(i=0; i<8; i++)
    {
        temp <<= 1;
        RF_SPI_SCK_H();
        if(READ_RF_SPI_MISO())
        {
          temp ++; 
        }
        RF_SPI_SCK_L();
    }
    __set_PRIMASK(0);   //全局中断打开
    return temp;
}