AT25DF081A stm32 驱动代码

以下是AT25DF081A在STM32上的SPI驱动代码示例（使用CubeMX生成的代码）：

#include "spi.h"
#include "main.h"

/* AT25DF081A SPI commands */
#define CMD_WREN    0x06    // Write Enable
#define CMD_WRDI    0x04    // Write Disable
#define CMD_RDSR    0x05    // Read Status Register
#define CMD_ERASE   0xC7    // Erase Chip
#define CMD_READ    0x03    // Read Data Bytes
#define CMD_PP      0x02    // Page Program

/* AT25DF081A Status Register bits */
#define SR_WIP      0x01    // Write In Progress
#define SR_WEL      0x02    // Write Enable Latch

/* AT25DF081A page size */
#define PAGE_SIZE   256

SPI_HandleTypeDef hspi1;

/**
  * @brief  Write enable command.
  */
void AT25DF081A_WriteEnable(void)
{
  uint8_t cmd = CMD_WREN;
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_RESET);
  HAL_SPI_Transmit(&hspi1, &cmd, 1, HAL_MAX_DELAY);
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_SET);
}

/**
  * @brief  Write disable command.
  */
void AT25DF081A_WriteDisable(void)
{
  uint8_t cmd = CMD_WRDI;
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_RESET);
  HAL_SPI_Transmit(&hspi1, &cmd, 1, HAL_MAX_DELAY);
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_SET);
}

/**
  * @brief  Read status register.
  * @return Status register value.
  */
uint8_t AT25DF081A_ReadStatus(void)
{
  uint8_t cmd = CMD_RDSR;
  uint8_t status;
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_RESET);
  HAL_SPI_Transmit(&hspi1, &cmd, 1, HAL_MAX_DELAY);
  HAL_SPI_Receive(&hspi1, &status, 1, HAL_MAX_DELAY);
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_SET);
  return status;
}

/**
  * @brief  Wait for write operation to complete.
  */
void AT25DF081A_WaitForWriteComplete(void)
{
  while (AT25DF081A_ReadStatus() & SR_WIP);
}

/**
  * @brief  Erase chip.
  */
void AT25DF081A_EraseChip(void)
{
  AT25DF081A_WriteEnable();
  uint8_t cmd = CMD_ERASE;
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_RESET);
  HAL_SPI_Transmit(&hspi1, &cmd, 1, HAL_MAX_DELAY);
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_SET);
  AT25DF081A_WaitForWriteComplete();
}

/**
  * @brief  Read data from memory.
  * @param  address: Start address.
  * @param  data: Pointer to read buffer.
  * @param  size: Number of bytes to read.
  */
void AT25DF081A_ReadData(uint32_t address, uint8_t *data, uint16_t size)
{
  uint8_t cmd[4] = {CMD_READ, (address >> 16) & 0xFF, (address >> 8) & 0xFF, address & 0xFF};
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_RESET);
  HAL_SPI_Transmit(&hspi1, cmd, 4, HAL_MAX_DELAY);
  HAL_SPI_Receive(&hspi1, data, size, HAL_MAX_DELAY);
  HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_SET);
}

/**
  * @brief  Write data to memory.
  * @param  address: Start address.
  * @param  data: Pointer to write buffer.
  * @param  size: Number of bytes to write.
  */
void AT25DF081A_WriteData(uint32_t address, uint8_t *data, uint16_t size)
{
  uint16_t page_size = PAGE_SIZE;
  uint16_t bytes_left = size;
  uint8_t *data_ptr = data;
  while (bytes_left > 0)
  {
    uint16_t page_offset = address % page_size;
    uint16_t page_remaining = page_size - page_offset;
    uint16_t write_size = (bytes_left < page_remaining) ? bytes_left : page_remaining;

    AT25DF081A_WriteEnable();

    uint8_t cmd[4] = {CMD_PP, (address >> 16) & 0xFF, (address >> 8) & 0xFF, address & 0xFF};
    HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_RESET);
    HAL_SPI_Transmit(&hspi1, cmd, 4, HAL_MAX_DELAY);
    HAL_SPI_Transmit(&hspi1, data_ptr, write_size, HAL_MAX_DELAY);
    HAL_GPIO_WritePin(AT25DF081A_CS_GPIO_Port, AT25DF081A_CS_Pin, GPIO_PIN_SET);

    AT25DF081A_WaitForWriteComplete();

    address += write_size;
    data_ptr += write_size;
    bytes_left -= write_size;
  }
}

其中，AT25DF081A_WriteEnable() 和 AT25DF081A_WriteDisable() 函数用于发送写使能和写禁用命令；AT25DF081A_ReadStatus() 函数用于读取状态寄存器；AT25DF081A_WaitForWriteComplete() 函数用于等待写操作完成；AT25DF081A_EraseChip() 函数用于擦除整个芯片；AT25DF081A_ReadData() 函数用于从指定地址读取数据；AT25DF081A_WriteData() 函数用于向指定地址写入数据。注意，具体的引脚定义和 SPI 初始化代码需要根据实际情况进行修改。