新手求助！！！！关于EEPROM读写问题

余生多指教 · 发表于 2018-1-24 18:12:16

用HAL库通过I2C总线对EEPROM进行读写操作时，写入256个字节成功，但是只能读取后面的16个字节，为什么呀！！！！

main.c部分如下：
/* USER CODE BEGIN 2 */
printf("\r\n***************I2C Example*******************************\r\n");
for(i=0; i<256; i++)
WriteBuffer=i; /* WriteBuffer init */

/* wrinte date to EEPROM */
if(HAL_I2C_Mem_Write(&hi2c2, ADDR_24LCxx_Write, 0, I2C_MEMADD_SIZE_8BIT,WriteBuffer,BufferSize, 0x1000) == HAL_OK)
printf("\r\n EEPROM 24C02 Write Test OK \r\n");
else
printf("\r\n EEPROM 24C02 Write Test False \r\n");
Delay_MS(5000);
/* read date from EEPROM */
HAL_I2C_Mem_Read(&hi2c2, ADDR_24LCxx_Read, 0, I2C_MEMADD_SIZE_8BIT,ReadBuffer,BufferSize, 0x1000);
for(i=0; i<256; i++)
printf("0x%02X  ",ReadBuffer);

if(memcmp(WriteBuffer,ReadBuffer,BufferSize) == 0 ) /* check date */
printf("\r\n EEPROM 24C02 Read Test OK\r\n");
else
printf("\r\n EEPROM 24C02 Read Test False\r\n");
  /* USER CODE END 2 */

i2c.c部分如下：
#include "i2c.h"

#include "gpio.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

I2C_HandleTypeDef hi2c2;

/* I2C2 init function */
void MX_I2C2_Init(void)
{

  hi2c2.Instance = I2C2;
  hi2c2.Init.ClockSpeed = 100000;
  hi2c2.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c2.Init.OwnAddress1 = 0;
  hi2c2.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c2.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c2.Init.OwnAddress2 = 0;
  hi2c2.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c2.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c2) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

}

void HAL_I2C_MspInit(I2C_HandleTypeDef* i2cHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspInit 0 */

  /* USER CODE END I2C2_MspInit 0 */

/**I2C2 GPIO Configuration
PB10    ------> I2C2_SCL
PB11    ------> I2C2_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* I2C2 clock enable */
__HAL_RCC_I2C2_CLK_ENABLE();
  /* USER CODE BEGIN I2C2_MspInit 1 */

  /* USER CODE END I2C2_MspInit 1 */
  }
}

void HAL_I2C_MspDeInit(I2C_HandleTypeDef* i2cHandle)
{

  if(i2cHandle->Instance==I2C2)
  {
  /* USER CODE BEGIN I2C2_MspDeInit 0 */

  /* USER CODE END I2C2_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_I2C2_CLK_DISABLE();

/**I2C2 GPIO Configuration
PB10    ------> I2C2_SCL
PB11    ------> I2C2_SDA
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_10|GPIO_PIN_11);

  /* USER CODE BEGIN I2C2_MspDeInit 1 */

  /* USER CODE END I2C2_MspDeInit 1 */
  }
}

烧录运行结果如图：