stm8 RTC自動喚醒

Stm8l RTC 調(diào)試心得 經(jīng)過兩天的摸索，終于把stm8l05b13的RCT 自動喚醒調(diào)通了。分別有庫和寄存器來實現(xiàn)。給大家分享一下。這里只說函數(shù)，原理自己看使用手冊，廢話不多說，程序呈上， RTC 初始化.

 

void RTC_Config(uint16_t time) 

{ RTC_DeInit(); //初始化默認狀態(tài) 

CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE); //允許RTC時鐘 

CLK_RTCClockConfig(CLK_RTCCLKSource_LSI, CLK_RTCCLKDiv_2); //選擇RTC時鐘源LSI、2=19K 

RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div16); //19k/16=1.1875KHz t=0.85ms 

RTC_ITConfig(RTC_IT_WUT, ENABLE); //開啟中斷 

RTC_SetWakeUpCounter(time); //設(shè)置RTC Weakup計算器初值 

RTC_WakeUpCmd(ENABLE); //使能自動喚醒 

} 

 

 

RTC 中斷 @far @interrupt 

void RTC_CSSLSE_IRQHandler (void)

 { RTC_WakeUpCmd(DISABLE); 

RTC_ClearITPendingBit(RTC_IT_WUT); 

} 

 

Main() 

{ GPIO_config(); 

RTC_Config(2000); //2000*0.85ms=1.7s _asm("rim");

 while(1)

 { if(!GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_3))

 { RTC_WakeUpCmd(ENABLE); LED(OFF); _asm("halt"); } LED(ON);; } }

 

 

 PB3接一個按鍵到地，指示燈滅，進入active-halt.1.7s后自動喚醒，指示燈亮 使用STVD 開發(fā)環(huán)境庫函數(shù)。stm8l系列容易發(fā)溢出。有時候代碼沒多少就已經(jīng)溢出了。刪除庫函數(shù)中的不要的部分，可能會得到一些空間但還是不夠，最直接的辦法就是改用寄存器操作 

void RTC_Config(uint16_t time)

 { uint16_t wutwfcount = 0; 

CLK->PCKENR2 =0x04; //CLK_PeripheralClockConfig(CLK_Peripheral_RTC, ENABLE); 

CLK->CRTCR =0x24;//CLK_RTCClockConfig(CLK_RTCCLKSource_LSI, CLK_RTCCLKDiv_2);//LSI=19K RTC->WPR = RTC_WPR_DisableKey1; 

RTC->WPR = RTC_WPR_DisableKey2; RTC->CR2 &=~0x04; 

while (((RTC->ISR1 & RTC_ISR1_WUTWF) == RESET) && ( wutwfcount != 0xffff)) { wutwfcount ; } 

RTC->CR1=0x00; 

RTC->CR2 &=~0x04; 

wutwfcount = 0; 

while (((RTC->ISR1 & RTC_ISR1_WUTWF) == RESET) && ( wutwfcount != 0xffff)) 

{ wutwfcount ; } RTC->WUTRH = (uint8_t)(time>> 8); 

RTC->WUTRL = (uint8_t)time; 

RTC->CR2 =0x04; RTC->WPR=0xff; } 

 

 

中斷函數(shù) @far @interrupt 

 

void RTC_IRQHandler(void) 

{ RTC->WPR = RTC_WPR_DisableKey1; 

RTC->WPR = RTC_WPR_DisableKey2; 

RTC->CR2 &=~0x04; RTC->WPR=0xff; 

RTC->ISR2&=~0x04; } 

 

關(guān)于RTC_Config中的while語句對應手冊里的一句話關(guān)于RTC->ISR1中的WUTWF位 This bit is set by hardware when the wakeup timer values can be changed, after the WUTE bit has been set to 0 in RTC_CR2 0: Wakeup timer update not allowed. 1: Wakeup timer update allowed.