【iCore4 雙核心板_ARM】例程三十七：SDRAM實驗——讀寫SDRAM

實驗現象：

上電即開始讀寫SDRAM測試，測試過程中，藍色LED點亮，如果出現錯誤，紅色LED閃爍，測試成功，綠色LED點亮。

核心程式碼：

int main(void)
{

  /* USER CODE BEGIN 1 */
    int i,j;
  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();

  /* USER CODE BEGIN 2 */
    //SDRAM³õʼ»¯
    BSP_SDRAM_Init();            
    LED_BLUE_ON;
    //ÏòSDRAMÖÐдÈë0x5555²¢¶ÁȡУÑé
    for(i = 0;i < SDRAM_SIZE;i++){ 
        write_sdram(i,0x5555);
    }
    for(i = 0;i < SDRAM_SIZE;i++){
        if(0x5555 != read_sdram(i)){
            while(1){
                LED_RED_ON;
                HAL_Delay(500);
                LED_RED_OFF;
                HAL_Delay(500);
            }
        }
    }

    //ÏòSDRAMÖÐдÈë0xAAAA²¢¶ÁȡУÑé
    for(i = 0;i < SDRAM_SIZE;i++){ 
        write_sdram(i,0xAAAA);
    }
    for(i = 0;i < SDRAM_SIZE;i++){
        if(0xAAAA != read_sdram(i)){
            while(1){
                LED_RED_ON;
                HAL_Delay(500);
                LED_RED_OFF;
                HAL_Delay(500);
            }
        }
    }    
    //ÏòSDRAMÖÐдÈë0x0000~0xFFFF²¢¶ÁȡУÑé
    for(j = 0; j < 256; j++){
        for(i = 0;i < 65536;i++){
            write_sdram((65536 * j + i),i);
        }
    }
    for(j = 0; j < 256; j ++){
        for(i = 0;i < 65536;i++){
            if(i != read_sdram((65536 * j + i))){
                while(1){
                    LED_RED_ON;
                    HAL_Delay(500);
                    LED_RED_OFF;
                    HAL_Delay(500);
                }
            }
        }
    }    
    //²âÊԳɹ¦
    LED_BLUE_OFF;
    LED_GREEN_ON;
  /* USER CODE END 2 */
    
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */

  }
  /* USER CODE END 3 */

}

原始碼下載連結：

連結：http://pan.baidu.com/s/1i5kqcst 密碼：d03o

iCore4連結：