【CW32饭盒派开发板试用体验】RTC电子时钟与ADC数据采集

在完成OLED屏显示驱动的情况下，结合RTC的计时功能即可完成电子时钟的制作。

为实现计时值的显示，为其配置的数值显示函数为：

void OLED_ShowNum(uint8_t x,uint8_ty,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(16,len-t-1))%16;       
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);
}
}

实现电子时钟功能的主程序为：

int32_t main(void)
{ 
RTC_InitTypeDef RTC_InitStruct;
RTC_TimeTypeDef RTC_TimeStruct;
RTC_AlarmTypeDef RTC_AlarmStruct; 
RCC_Configuration();   
LogInit();
RCC_HSE_FLT_CLOSE); 
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= 0x21;
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);
OLED_gpio();
OLED_Init(); 
OLED_Clear(); 
OLED_ShowString(40,0,"CW32F030",16);
OLED_ShowString(28,3,"  : :",16);
while(1)
{
  RTC_GetTime(&RTC_TimeStruct);     
  OLED_ShowNum(28,3,RTC_TimeStruct.Hour,2,16);            
  OLED_ShowNum(52,3,RTC_TimeStruct.Minute,2,16);
  OLED_ShowNum(80,3,RTC_TimeStruct.Second,2,16);
  delay(500); 
}
}

经程序的编译与下载，其显示效果如图1所示。

图1 电子时钟

为便于测试ADC数据采集功能，在开发板上配置电位器来输出共测试用的模拟电压，其电路如图2所示。

图2 信号模拟

ADC数据采集的端口初始化函数为：

void ADC_PortInit(void)
{   
REGBITS_SET( CW_SYSCTRL->AHBEN, YSCTRL_AHBEN_GPIOA_Msk );   
REGBITS_SET( CW_SYSCTRL->APBEN2, YSCTRL_APBEN2_ADC_Msk );   
//set PA01 as AIN1 INPUT   
PA01_ANALOG_ENABLE();
}

BTIM初始化函数为：

void BTIM_init(void)
{
    BTIM_TimeBaseInitTypeDefBTIM_InitStruct;
    __RCC_BTIM_CLK_ENABLE();
    __disable_irq();
    NVIC_EnableIRQ(BTIM1_IRQn); 
    __enable_irq();
    BTIM_InitStruct.BTIM_Mode= BTIM_Mode_TIMER;
    BTIM_InitStruct.BTIM_OPMode =BTIM_OPMode_Repetitive;
    BTIM_InitStruct.BTIM_Period = 8000;
    BTIM_InitStruct.BTIM_Prescaler =BTIM_PRS_DIV8;
    BTIM_TimeBaseInit(CW_BTIM1,&BTIM_InitStruct);
    BTIM_ITConfig(CW_BTIM1,BTIM_IT_OV, ENABLE);
    BTIM_Cmd(CW_BTIM1, ENABLE);
}

BTIM中断处理函数为：

void BTIM1_IRQHandler(void)
{
  static unsigned int count2=0;
  if(BTIM_GetITStatus(CW_BTIM1, BTIM_IT_OV))
  { 
                   BTIM_ClearITPendingBit(CW_BTIM1, BTIM_IT_OV);
                   count2++;
                   timecount++;
                   if(count2>500)
                   {
                            count2=0;
                            PB00_TOG();
                   }
  }
}

RCC时钟配置函数为：

void RCC_Configuration(void)
{ 
RCC_HSI_Enable(RCC_HSIOSC_DIV6); 
RCC_HCLKPRS_Config(RCC_HCLK_DIV1); 
RCC_PCLKPRS_Config(RCC_PCLK_DIV1); 
RCC_PLL_Enable(RCC_PLLSOURCE_HSI, 8000000, 8); 
__RCC_FLASH_CLK_ENABLE(); 
RCC_SysClk_Switch(RCC_SYSCLKSRC_PLL); 
RCC_SystemCoreClockUpdate(64000000);   
}

进行ADC数据采集的配置处理函数为：

void ADC_Configuration(void)
{ 
ADC_SingleChTypeDef ADC_SingleInitStruct; 
__RCC_ADC_CLK_ENABLE();
__RCC_GPIOB_CLK_ENABLE(); 
PB00_ANALOG_ENABLE(); 
ADC_SingleInitStruct.ADC_Chmux = ADC_ExInputCH8; 
ADC_SingleInitStruct.ADC_DiscardEn = ADC_DiscardNull; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_AccEn = DC_AccDisable; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_Align = DC_AlignRight; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_ClkDiv = DC_Clk_Div16;  
ADC_SingleInitStruct.ADC_InitStruct.ADC_DMAEn = DC_DmaDisable; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_InBufEn = DC_BufEnable; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_OpMode =ADC_SingleChOneMode;    
ADC_SingleInitStruct.ADC_InitStruct.ADC_SampleTime = ADC_SampTime5Clk; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_TsEn = DC_TsDisable; 
ADC_SingleInitStruct.ADC_InitStruct.ADC_VrefSel = ADC_Vref_VDDA; 
ADC_SingleInitStruct.ADC_WdtStruct.ADC_WdtAll = DC_WdtDisable;     
ADC_SingleChOneModeCfg(&ADC_SingleInitStruct); 
ADC_Enable();ADC_SoftwareStartConvCmd(ENABLE);
}

实现数字电压检测的主程序为：

int main(void)
{   
         float temp;
         unsigned int tempv,tempu;   
         RCC_HSI_Enable(RCC_HSIOSC_DIV6);
         OLED_gpio();
         OLED_Init();   
         OLED_Clear();   
         OLED_ShowString(28,0,"CW32F030",16);   
         OLED_ShowCHinese(28,2,0);
         OLED_ShowCHinese(48,2,1);
         OLED_ShowCHinese(68,2,2);
         OLED_ShowString(28,5,"U=.   V",16);
         ADC_Configuration(); 
         BTIM_init();
         while(1)
         {
                   if(timecount>200)
                   {
                             timecount=0;
                             ADC_SoftwareStartConvCmd(ENABLE);
                             while(ADC_GetITStatus(ADC_IT_EOC))
                             {
                                      ADC_ClearITPendingBit(ADC_IT_EOC); 
                                      adcvalue=ADC_GetConversionValue();
                                      temp=(float)adcvalue*(3.3/40.96);
                                      tempv=temp;
                                      LED_ShowNum(44,5,tempv/100,1,16);
                                      tempu=tempv%100;
                                      OLED_ShowNum(60,5,tempu,2,16);
                            }
                   }
         }
}

经程序的编译与下载，其显示效果如图3和图4所示。

图3 数据采集

图4 满量程