EEPROM AT25320 STM32 SPI没法读写

2013-10-29

EEPROM AT25320 STM32 SPI无法读写EEPROM 无法读写。#include stm32f10x.h#define WREN0x06 /* Set Write

EEPROM AT25320 STM32 SPI无法读写
EEPROM 无法读写。

#include "stm32f10x.h"

#define WREN  0x06 /* Set Write Enable Latch */
#define WRDI  0x04 /* Reset Write Enable Latch */
#define RDSR  0x05 /* Read Status Register */
#define WRSR  0x01 /* Write Status Register */
#define READ  0x03 /* Read Data From Memory Array */
#define WRITE 0x02 /* Write Data to Memory Array */

#define CS_EN  GPIO_ResetBits(GPIOD,GPIO_Pin_2)
#define CS_DI  GPIO_SetBits(GPIOD,GPIO_Pin_2);

void RCC_Config(void);
void GPIO_Config(void);
void SPI_Config(void);
uint8_t AT25320_GetStatus(void);
void AT25320_WaitReady(void);
void SPI_WriteByte(uint8_t data);
uint8_t SPI_ReadByte(void);
uint8_t AT25320_ReadByte(uint16_t addr);
void AT25320_WriteByte(uint16_t addr,uint8_t data);

void RCC_Config(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO,ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);
}

void GPIO_Config(void)
{
  GPIO_InitTypeDef gpio;

  gpio.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_7;/* CLK and MOSI*/
  gpio.GPIO_Mode = GPIO_Mode_AF_PP;
  gpio.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA,&gpio);

  gpio.GPIO_Pin = GPIO_Pin_6;/* MISO */
  gpio.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA,&gpio);

  gpio.GPIO_Pin = GPIO_Pin_2;/* CS */
  gpio.GPIO_Mode = GPIO_Mode_AF_PP;
  gpio.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOD,&gpio);

}
void SPI_Config()
{
  SPI_InitTypeDef spi1;

  SPI_I2S_DeInit(SPI1);
  spi1.SPI_Direction = SPI_Direction_2Lines_FullDuplex;/* è???1¤ */
  spi1.SPI_Mode = SPI_Mode_Master;
  spi1.SPI_DataSize = SPI_DataSize_8b;
  spi1.SPI_CPOL = SPI_CPOL_Low;   /*  ?￡ê?0 */
  spi1.SPI_CPHA = SPI_CPHA_1Edge;
  spi1.SPI_NSS = SPI_NSS_Soft;
  spi1.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;/* SPI?μ?ê 72MHz/4 = 18MHz*/
  spi1.SPI_FirstBit = SPI_FirstBit_MSB;
    spi1.SPI_CRCPolynomial = 7;

    SPI_Init(SPI1,&spi1);
    SPI_Cmd(SPI1,ENABLE);
}
uint8_t AT25320_GetStatus(void)
{
  uint8_t tmp;

  CS_EN;
  SPI_WriteByte(RDSR);
  tmp = SPI_ReadByte();
  CS_DI;
  return tmp;
}
void AT25320_WaitReady(void)
{
  while((0x01 & AT25320_GetStatus())!=0);
}
void SPI_WriteByte(uint8_t data)
{
   while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI1,data);
}
uint8_t SPI_ReadByte(void)
{
  while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_RXNE) == RESET);
  return SPI_I2S_ReceiveData(SPI1);
}
uint8_t AT25320_ReadByte(uint16_t addr)
{
   uint8_t tmp;

   if(addr >4096)
  return 0;
AT25320_WaitReady();

   SPI_Cmd(SPI1,ENABLE);
   CS_EN;
   SPI_WriteByte(READ);
   SPI_WriteByte((uint8_t)((addr & 0x0F00)>>8));/* A11-A8*/
SPI_WriteByte((uint8_t)(addr & 0x00FF));/* A7-A0*/
   tmp = SPI_ReadByte();
   CS_DI;
   SPI_Cmd(SPI1,DISABLE);
return tmp;
}
void AT25320_WriteByte(uint16_t addr,uint8_t data)
{
    if(addr > 4096)
return;
AT25320_WaitReady();

    SPI_Cmd(SPI1,ENABLE);
    CS_EN;
    SPI_WriteByte(WREN);
    CS_DI;

    CS_EN;
    SPI_WriteByte(WRITE);
    SPI_WriteByte((uint8_t)((addr & 0x0F00)>>8));/* A11-A8*/
SPI_WriteByte((uint8_t)(addr & 0x00FF));/* A7-A0*/
    SPI_WriteByte(data);
    CS_DI;
    SPI_Cmd(SPI1,DISABLE);
}
int main(void)
{

  uint16_t i;
  uint8_t buf[10];

  RCC_Config();
  GPIO_Config();
  SPI_Config();

  for(i=0;i<10;i++)
{
buf[i] = 0;
}
    for(i=0;i<10;i++)
{
AT25320_WriteByte(i,i);
}
  for(i=0;i<10;i++)
{
  buf[i] = AT25320_ReadByte(i);
}
  return 0;
}
?AT25320?STM32?SPI读写
[解决办法]
http://www.keil.com/download/docs/371.asp
拿这个改改就行了。
[解决办法]
单步调试一下看看停留在哪里

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EEPROM AT25320 STM32 SPI没法读写