在HC32F460内部配有RTC功能,这里我们为它配上OLED屏显示,这样它就构成一个RTC电子时钟。
所用的OLED屏就是随板子自带的,该OLED屏的原理图见图1所示。
图1 OLED屏原理图
本想以I2C通讯来驱动OLED屏,但将其移到RTC的程序中,比较难协调,最终还是以模拟I2C的方式来轻松地将两者结合在一起。
由于SDA和SCL 仍占用原位置,故定义其输出高低电平的语句如下:
#define OLED_SCLK_Set() PORT_SetBits(PortD, Pin00)
#define OLED_SCLK_Clr() PORT_ResetBits(PortD, Pin00)
#define OLED_SDIN_Set() PORT_SetBits(PortD, Pin01)
#define OLED_SDIN_Clr() PORT_ResetBits(PortD, Pin01)
所用的字符显示函数为:
- void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t Char_Size)
- {
- unsigned char j=0;
- while (chr[j]!='\0')
- {
- OLED_ShowChar(x,y,chr[j],Char_Size);
- x+=8;
- if(x>120){x=0;y+=2;}
- j++;
- }
- }
复制代码 所用的数值显示函数为:- void OLED_ShowNum(uint8_t x,uint8_t y,uint32_t num,uint8_t len,uint8_t size2)
- {
- uint8_t t,temp;
- uint8_t enshow=0;
- for(t=0;t<len;t++)
- {
- temp=(num/oled_pow(10,len-t-1))%10;
- if(enshow==0&&t<(len-1))
- {
- if(temp==0)
- {
- OLED_ShowChar(x+(size2/2)*t,y,' ',size2);
- continue;
- }else enshow=1;
- }
- OLED_ShowChar(x+(size2/2)*t,y,temp+'0',size2);
- }
- }
复制代码 进行RTC
时间设置的函数为:- static void Rtc_CalendarConfig(void)
- {
- stc_rtc_date_time_t stcRtcDateTimeCfg;
- MEM_ZERO_STRUCT(stcRtcDateTimeCfg);
- stcRtcDateTimeCfg.u8Year = 20u;
- stcRtcDateTimeCfg.u8Month = 9;
- stcRtcDateTimeCfg.u8Day = 27u;
- stcRtcDateTimeCfg.u8Weekday = RtcWeekdaySunday;
- stcRtcDateTimeCfg.u8Hour = 12u;
- stcRtcDateTimeCfg.u8Minute = 23u;
- stcRtcDateTimeCfg.u8Second = 01u;
- if (RTC_SetDateTime(RtcDataFormatDec, &stcRtcDateTimeCfg, Enable, Enable) != Ok)
- {
- printf("write calendar failed!\r\n");
- }
- }
复制代码 实现图1
和图2
显示效果的主程序如下:- int32_t main(void)
- {
- stc_port_init_t stcPortInit;
- stc_rtc_date_time_t stcCurrDateTime;
- MEM_ZERO_STRUCT(stcPortInit);
- MEM_ZERO_STRUCT(stcCurrDateTime);
- LED0_OFF();
- stcPortInit.enPinMode = Pin_Mode_Out;
- PORT_Init(LED0_PORT, LED0_PIN, &stcPortInit);
- stcPortInit.enPinMode = Pin_Mode_Out;
- PORT_Init(PortD, Pin00, &stcPortInit);
- PORT_Init(PortD, Pin01, &stcPortInit);
- Xtal32_ClockConfig();
- Ddl_UartInit();
- Rtc_Config();
- OLED_Init();
- OLED_Clear();
- OLED_ShowString(0,0,"HC32F460 TEST",16);
- OLED_ShowString(0,2,"OLED & RTC",16);
- Ddl_Delay1ms(1000u);
- OLED_Clear();
- OLED_ShowString(0,0,"20 - -",16);
- OLED_ShowString(0,2," : :",16);
- while (1)
- {
- if (1u == u8SecIntFlag)
- {
- u8SecIntFlag = 0u;
- LED0_TOGGLE();
- if (RTC_GetDateTime(RtcDataFormatDec, &stcCurrDateTime) = Ok)
- {
- OLED_ShowNum(16,0,stcCurrDateTime.u8Year,2,16);
- OLED_ShowNum(40,0,stcCurrDateTime.u8Month,2,16);
- OLED_ShowNum(64,0,stcCurrDateTime.u8Day,2,16);
- OLED_ShowNum(16,2,stcCurrDateTime.u8Hour,2,16);
- OLED_ShowNum(40,2,stcCurrDateTime.u8Minute,2,16);
- OLED_ShowNum(64,2,stcCurrDateTime.u8Second,2,16);
- }
- }
- }
- }
复制代码图2 初始界面
3.jpg (30.75 KB, 下载次数: 2)
下载附件 保存到相册
2020-9-29 11:31 上传
图3 RTC运行界面
本站仅提供存储服务,所有内容均由用户发布,如发现有害或侵权内容,请
点击举报。