调用puts函数成功：

LCD显示文字：
LCD_SetColors(LCD_COLOR_BLUE, LCD_COLOR_WHITE);
  LCD_DisplayStringLine_EN_CH(LINE(5), (uint8_t *)"*** 28/03/2016 6:15:01 PM");

The key is down.
The key is down.
The key is down.
The key is down.
The key is down.
This is a string.
This is a string.
The key is down and the number is 1.
The key is down and the number is 2.
The key is down and the number is 3.
The key is down and the number is 4.
The key is down and the number is 5.
The key is down and the number is 6.
The key is down and the number is 7.
The key is down and the number is 8.
The key is down and the number is 9.
The key is down and the number is 10.
The key is down and the number is 11.
The key is down and the number is 12.
The key is down and the number is 13.
The key is down and the number is 14.
The key is down and the number is 15.
The key is down and the number is 16.
The key is down and the number is 17.
The key is down and the number is 18.

void show(void)
{
    static int a = 1;
    printf("The key is down and the number is %d.\n", a);
    a++;
}

目前的情况是：数据能够正常发送，但是接收到的jpg图像虽然开头和结尾的几个字节是正确的，但是却无法用图片查看器打开，文件格式无法识别。