【CW32饭盒派开发板试用体验】TFT显示屏显示驱动与RTC电子时钟

饭盒派上最显眼的外设就是 1.77寸TFT显示屏，其接口电路如图1所示。若将TFT屏的显示功能与RTC计时功能结合起来就可实现一个电子时钟。

图1 LCD屏接口

为此，需在RTC例程的基础上添加TFT显示程序，在完成功能的添加后，即可使TFT屏显示出颜色来，见图2所示。

图2 显示测试

随后，将主程序修改为如下的内容：

int32_t main(void)
{ 
RTC_InitTypeDef RTC_InitStruct;
RTC_TimeTypeDef RTC_TimeStruct;
RTC_AlarmTypeDefRTC_AlarmStruct; 
RCC_Configuration();  
GPIO_Configuration(); 
NVIC_Configuration(); 
LogInit();  
RCC_LSE_Enable(RCC_LSE_MODE_OSC, RCC_LSE_AMP_NORMAL,RCC_LSE_DRIVER_NORMAL);
RTC_InitStruct.DateStruct.Day= 0x21;
RTC_InitStruct.DateStruct.Month= RTC_Month_June;、RTC_InitStruct.DateStruct.Week= RTC_Weekday_Monday;
RTC_InitStruct.DateStruct.Year= 0x23;
RTC_InitStruct.TimeStruct.Hour= 0x2;
RTC_InitStruct.TimeStruct.Minute= 0x58;
RTC_InitStruct.TimeStruct.Second= 0x59; 
RTC_InitStruct.TimeStruct.AMPM = 1; 
RTC_InitStruct.TimeStruct.H24 = 0; 
RTC_InitStruct.RTC_ClockSource = RTC_RTCCLK_FROM_LSE; 
RTC_Init(&RTC_InitStruct);
RTC_AlarmStruct.RTC_AlarmMask
= RTC_AlarmMask_WeekMON | RTC_AlarmMask_WeekTUE |                                        
RTC_AlarmMask_WeekWED | RTC_AlarmMask_WeekTHU |                                                                                                                                                               RTC_AlarmMask_WeekFRI;
RTC_AlarmStruct.RTC_AlarmTime.Hour= 6;
RTC_AlarmStruct.RTC_AlarmTime.Minute= 0x45;
RTC_AlarmStruct.RTC_AlarmTime.Second= 0;
RTC_SetAlarm(RTC_Alarm_A,&RTC_AlarmStruct);
RTC_AlarmCmd(RTC_Alarm_A,ENABLE);
RTC_ITConfig(RTC_IT_ALARMA| RTC_IT_INTERVAL, ENABLE);
Lcd_Init();
Lcd_Clear(RED);
Gui_DrawFont_GBK16(20,10,GRAY0,RED,"CW32F030");
Gui_DrawFont_GBK16(20,40,GRAY0,RED,"RTC Test");
Gui_DrawFont_GBK16(20,80,GRAY0,RED,"  : :");         Gui_DrawFont_GBK16(20,140,GRAY0,RED,"JENNYZHAOJIE");
Gui_DrawLine(0,30,127,30,GRAY0);
Gui_DrawLine(0,136,127,136,GRAY0);
while(1)
{
  RTC_GetTime(&RTC_TimeStruct);     
  ShowNum(20,80,GRAY0,RED,RTC_TimeStruct.Hour,2);            
  ShowNum(44,80,GRAY0,RED,RTC_TimeStruct.Minute,2);            
  ShowNum(68,80,GRAY0,RED,RTC_TimeStruct.Second,2);
  delay(500);
 }
}

经程序的编译与下载，则可以得到图2所示的计时效果。

图3 计时效果

此外，如何需要对RTC的计时值进行调整，还可利用开发板上3个小按键来进行数值的调整和设置，感兴趣的话不妨一试。