[参考译文] TMS320F28P650DK：EEPROM 器件型号 — 24LC256

https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1527414/tms320f28p650dk-eeprom-part-number---24lc256

工具/软件：

大家好！

我当前正在使用  TMS320F28P65DK9  并连接到 EEPROM ( 24LC256 ) 至  I2C 。 我在写入和读取数据时遇到问题。

我已附上  .c  文件以供您参考。

我已将从器件地址配置为  0x50 。

写入序列：

• 启动

• [0xA0] →EEPROM 7 位地址 (0x50)<< 1 +写入位 (0)= 0xA0

• [0x00] → ControlAddr (0x0000 >> 8) 的高字节

• [0x00] → ControlAddr (0x0000 & 0xFF) 的低字节

• [0x46] →数据字节（值 70）

• STOP

读取序列：

• 启动

• [0xA0] →写入模式

• [0x00]

• [0x00]

• 重复启动

• [0xA1] →读取模式

• 读取字节

• STOP
  
  有的时候,上面的工作正常。但有的时候它是失败的。
  请指导我解决上述问题、并告诉我出错的地方。

  #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>
  #include "driverlib.h"
  #include "device.h"
  #include "libs/i2c/i2c_driver.h"
  #include "drivers_internal/uart/uart_driver.h"
  #include "libs/i2c/i2c.h"
  #include "i2c.h"
  #include "eeprom.h"
  
  #define EEPROM_I2C_ADDR  0x50  // 24LC256 default I2C address
  
  /**
   * @brief CLI command to write a byte to EEPROM
   * @param argc Number of arguments
   * @param argv Argument list: [mem_addr] [data]
   * @return 0 on success, -1 on failure
   */
  int cli_write_eeprom(int argc, char **argv)
  {
      if (argc < 3) {
          uart_printf("[Error] Usage: write-eeprom <mem_addr> <data>\r\n");
          return -1;
      }
  
      uint16_t mem_addr = (uint16_t)strtol(argv[1], NULL, 0);  // Hex or decimal
      uint8_t data      = (uint8_t)strtol(argv[2], NULL, 0);
  
      uart_printf("[EEPROM] Writing to Address: 0x%04X with Data: 0x%02X...\r\n", mem_addr, data);
  
      if (EEPROM_write(I2CB_BASE, mem_addr, data, EEPROM_I2C_ADDR) == 0) {
          uart_printf("[Success] EEPROM Write: Addr = 0x%04X, Data = 0x%02X\r\n", mem_addr, data);
          return 0;
      } else {
          uart_printf("[Failure] EEPROM Write Failed at Addr = 0x%04X\r\n", mem_addr);
          return -1;
      }
  }
  
  /**
   * @brief CLI command to read a byte from EEPROM
   * @param argc Number of arguments
   * @param argv Argument list: [mem_addr]
   * @return 0 on success, -1 on failure
   */
  int cli_read_eeprom(int argc, char **argv)
  {
      if (argc < 2) {
          uart_printf("[Error] Usage: read-eeprom <mem_addr>\r\n");
          return -1;
      }
  
      uint16_t mem_addr = (uint16_t)strtol(argv[1], NULL, 0);  // Hex or decimal
      uint8_t data = 0;
  
      uart_printf("[EEPROM] Reading from Address: 0x%04X...\r\n", mem_addr);
  
      if (EEPROM_read(I2CB_BASE, mem_addr, &data, EEPROM_I2C_ADDR) == 0) {
          uart_printf("[Success] EEPROM Read: Addr = 0x%04X, Data = 0x%02X\r\n", mem_addr, data);
          return 0;
      } else {
          uart_printf("[Failure] EEPROM Read Failed at Addr = 0x%04X\r\n", mem_addr);
          return -1;
      }
  }
  int EEPROM_write(uint32_t base, uint16_t mem_addr, uint8_t data, uint8_t i2c_addr) {
      uint8_t buf[3];
  
      buf[0] = (mem_addr >> 8) & 0xFF;
      buf[1] = mem_addr & 0xFF;
      buf[2] = data;
  
      uart_printf("[EEPROM] Writing data...\r\n  ? I2C Address: 0x%02X\r\n  ? Memory Address: 0x%04X\r\n  ? Data: 0x%02X\r\n",
                  i2c_addr, mem_addr, data);
  
      return i2c_write(base, i2c_addr, buf, 3);
  }
  
  
  
  int EEPROM_read(uint32_t base, uint16_t mem_addr, uint8_t *data, uint8_t i2c_addr) {
      uint8_t addr_buf[2];
  
      addr_buf[0] = (mem_addr >> 8) & 0xFF;
      addr_buf[1] = mem_addr & 0xFF;
  
      uart_printf("[EEPROM] Reading data...\r\n  ? I2C Address: 0x%02X\r\n  ? Memory Address: 0x%04X\r\n",
                  i2c_addr, mem_addr);
  
      if (i2c_write(base, i2c_addr, addr_buf, 2) != 0) {
          uart_printf("[EEPROM] Failed to set memory address 0x%04X for read\r\n", mem_addr);
          return -1;
      }
  
      return i2c_read(base, i2c_addr, data, 1);
  }