STM32f4---TFTLCD display experimental code (06)

Special note: This function uses printf to print the LCD ID, so if you do not initialize the serial port in the main function, the program will die in printf! ! If you do not want to use printf, please comment it out.

This is the end of the LCD driver related functions. Next, let's look at the main function code as follows:

int main(void)

{  

    x=0;

  u8 lcd_id[12]; //Store LCD ID string

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //Set system interrupt priority group 2

  delay_init(168); //Initialize delay function

  uart_init(115200); //Initialize the serial port baud rate to 115200

  LED_Init(); //Initialize LED

    LCD_Init(); //Initialize LCD FSMC interface

  POINT_COLOR=RED;  

  sprintf((char*)lcd_id,"LCD ID:X",lcddev.id);//Print LCD ID to lcd_id array.

     while(1)  

  {      

    switch(x)

    {

      case 0:LCD_Clear(WHITE);break;

      case 1:LCD_Clear(BLACK);break;

      case 2:LCD_Clear(BLUE);break;

      case 3:LCD_Clear(RED);break;

      case 4:LCD_Clear(MAGENTA);break;

      case 5:LCD_Clear(GREEN);break;

      case 6:LCD_Clear(CYAN);break;  

      case 7:LCD_Clear(YELLOW);break;

      case 8:LCD_Clear(BRRED);break;

      case 9:LCD_Clear(GRAY);break;

      case 10:LCD_Clear(LGRAY);break;

      case 11:LCD_Clear(BROWN);break;

    }

    POINT_COLOR=RED;     

    LCD_ShowString(30,40,210,24,24,"Explorer STM32F4");  

    LCD_ShowString(30,70,200,16,16,"TFTLCD TEST");

    LCD_ShowString(30,90,200,16,16,"ATOM@ALIENTEK");

      LCD_ShowString(30,110,200,16,16,lcd_id); //Show LCD ID           

    LCD_ShowString(30,130,200,12,12,"2014/5/4");                    

       x++;

    if(x==12)x=0;

    LED0=!LED0;delay_ms(1000);  

  }  

}

This part of the code will display some fixed characters, with font sizes of 24*12, 16*8 and 12*6, and the model of the LCD driver IC, and then switch the background color continuously, switching once every 1s. LED0 will also flash continuously, indicating that the program is running. We use a sprintf function, which is used in the same way as printf, except that sprintf outputs the printed content to the specified memory range. For detailed usage of sprintf, please search Baidu.

Also pay special attention: the uart_init function cannot be removed, because printf is called in the LCD_Init function, so once you remove this initialization, the system will freeze! In fact, as long as your code uses printf, you must initialize the serial port, otherwise it will freeze, that is, stop at the fputc function in usart.c and cannot get out.