stm32f103c8t6 硬件spi驱动及w25q64读写

以下是基于STM32F103C8T6芯片的硬件SPI驱动及W25Q64读写的示例代码，供参考。

SPI驱动：

#include "stm32f10x.h"

#define SPI_PORT GPIOA
#define SPI_SCK GPIO_Pin_5
#define SPI_MOSI GPIO_Pin_7
#define SPI_MISO GPIO_Pin_6

void SPI_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_SPI1, ENABLE);

    GPIO_InitStructure.GPIO_Pin = SPI_SCK | SPI_MOSI;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(SPI_PORT, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = SPI_MISO;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(SPI_PORT, &GPIO_InitStructure);

    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_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(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

uint8_t SPI_SendByte(uint8_t byte)
{
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
    SPI_I2S_SendData(SPI1, byte);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
    return SPI_I2S_ReceiveData(SPI1);
}

W25Q64读写：

#include "stm32f10x.h"

#define W25Q64_CS GPIO_Pin_4

void W25Q64_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

    GPIO_InitStructure.GPIO_Pin = W25Q64_CS;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_WriteEnable(void)
{
    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0x06);
    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_ReadStatus(uint8_t *status)
{
    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0x05);
    *status = SPI_SendByte(0xFF);
    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_WriteStatus(uint8_t status)
{
    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0x01);
    SPI_SendByte(status);
    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_EraseChip(void)
{
    W25Q64_WriteEnable();
    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0xC7);
    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_EraseSector(uint32_t address)
{
    W25Q64_WriteEnable();
    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0x20);
    SPI_SendByte((address >> 16) & 0xFF);
    SPI_SendByte((address >> 8) & 0xFF);
    SPI_SendByte(address & 0xFF);
    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_WritePage(uint32_t address, uint8_t *data, uint32_t length)
{
    uint32_t i;

    W25Q64_WriteEnable();
    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0x02);
    SPI_SendByte((address >> 16) & 0xFF);
    SPI_SendByte((address >> 8) & 0xFF);
    SPI_SendByte(address & 0xFF);
    for (i = 0; i < length; i++) {
        SPI_SendByte(data[i]);
    }
    GPIO_SetBits(GPIOA, W25Q64_CS);
}

void W25Q64_ReadData(uint32_t address, uint8_t *data, uint32_t length)
{
    uint32_t i;

    GPIO_ResetBits(GPIOA, W25Q64_CS);
    SPI_SendByte(0x03);
    SPI_SendByte((address >> 16) & 0xFF);
    SPI_SendByte((address >> 8) & 0xFF);
    SPI_SendByte(address & 0xFF);
    for (i = 0; i < length; i++) {
        data[i] = SPI_SendByte(0xFF);
    }
    GPIO_SetBits(GPIOA, W25Q64_CS);
}