本帖最后由 jinglixixi 于 2020-9-29 11:25 编辑
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++;
}
}
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);
}
}
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");
}
}
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);
}
}
}
}
图2 初始界面
图3 RTC运行界面
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