291 lines
7.4 KiB
C++
291 lines
7.4 KiB
C++
#include "Device\RTC.h"
|
||
#include "Kernel\TTime.h"
|
||
#include "Kernel\Interrupt.h"
|
||
|
||
#include "Platform\stm32.h"
|
||
|
||
//#define TIME_DEBUG DEBUG
|
||
|
||
/************************************************ HardRTC ************************************************/
|
||
|
||
bool RTC_WaitForLastTask2(uint retry = 300)
|
||
{
|
||
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET && --retry);
|
||
|
||
return retry > 0;
|
||
}
|
||
|
||
void RTC_Configuration(bool init, bool ext)
|
||
{
|
||
/* 备份寄存器模块复位，将BKP的全部寄存器重设为缺省值 */
|
||
if(init) BKP_DeInit();
|
||
|
||
if(!ext)
|
||
{
|
||
/* Enable LSI */
|
||
RCC_LSICmd(ENABLE);
|
||
/* 等待稳定 */
|
||
while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET);
|
||
|
||
// 使用内部 32 KHz 晶振作为 RTC 时钟源
|
||
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
|
||
}
|
||
else
|
||
{
|
||
/* 设置外部低速晶振(LSE)32.768K 参数指定LSE的状态，可以是：RCC_LSE_ON：LSE晶振ON */
|
||
RCC_LSEConfig(RCC_LSE_ON);
|
||
/* 等待稳定 */
|
||
while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET);
|
||
|
||
// RTC时钟源配置成LSE（外部32.768K）
|
||
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
|
||
}
|
||
|
||
/* 使能RTC时钟 */
|
||
RCC_RTCCLKCmd(ENABLE);
|
||
|
||
/* 开启后需要等待APB1时钟与RTC时钟同步，才能读写寄存器 */
|
||
RTC_WaitForSynchro();
|
||
|
||
/* 每一次读写寄存器前，要确定上一个操作已经结束 */
|
||
RTC_WaitForLastTask2();
|
||
|
||
/* 使能秒中断 */
|
||
//RTC_ITConfig(RTC_IT_SEC, ENABLE);
|
||
|
||
/* 每一次读写寄存器前，要确定上一个操作已经结束 */
|
||
//RTC_WaitForLastTask2();
|
||
|
||
if(init)
|
||
{
|
||
/* 设置RTC分频器，使RTC时钟为1Hz */
|
||
//if(!ext)
|
||
//RTC_SetPrescaler(31999); /* RTC period = RTCCLK/RTC_PR = (32.000 KHz)/(31999+1) */
|
||
//else
|
||
//RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
|
||
|
||
// 为了使用低功耗，时钟为1kHz
|
||
// 1ms计数，32位定时器，最大计时约49天
|
||
RTC_SetPrescaler(32);
|
||
|
||
/* 每一次读写寄存器前，要确定上一个操作已经结束 */
|
||
RTC_WaitForLastTask2();
|
||
}
|
||
}
|
||
|
||
static uint g_NextSave; // 下一次保存Ticks的时间，避免频繁保存
|
||
|
||
void AlarmHandler(ushort num, void* param);
|
||
|
||
void HardRTC::Init()
|
||
{
|
||
/*****************************/
|
||
/* GD32和STM32最大的区别就是STM32给寄存器默认值，而GD32没有给默认值 */
|
||
/* 虽然RTC靠电池工作，断电后能保持配置，但是在GD32还是得重新打开时钟 */
|
||
|
||
/* 启用PWR和BKP的时钟 */
|
||
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
|
||
|
||
/* 后备域解锁 */
|
||
PWR_BackupAccessCmd(ENABLE);
|
||
|
||
// 下一次保存Ticks的数值，避免频繁保存
|
||
g_NextSave = 0;
|
||
|
||
Opened = true;
|
||
|
||
if(ReadBackup(0) != 0xABCD)
|
||
{
|
||
RTC_Configuration(true, External);
|
||
|
||
WriteBackup(0, 0xABCD);
|
||
}
|
||
else
|
||
{
|
||
//虽然RTC模块不需要重新配置，且掉电后依靠后备电池依然运行
|
||
//但是每次上电后，还是要使能RTCCLK
|
||
RTC_Configuration(false, External);
|
||
|
||
// 从RTC还原滴答
|
||
LoadTime();
|
||
}
|
||
|
||
if(LowPower)
|
||
{
|
||
EXTI_ClearITPendingBit(EXTI_Line17);
|
||
EXTI_InitTypeDef exit;
|
||
exit.EXTI_Line = EXTI_Line17;
|
||
exit.EXTI_Mode = EXTI_Mode_Interrupt;
|
||
exit.EXTI_Trigger = EXTI_Trigger_Rising;
|
||
exit.EXTI_LineCmd = ENABLE;
|
||
EXTI_Init(&exit);
|
||
|
||
Interrupt.SetPriority(RTCAlarm_IRQn, 0);
|
||
Interrupt.Activate(RTCAlarm_IRQn, AlarmHandler, this);
|
||
}
|
||
}
|
||
|
||
void HardRTC::LoadTime()
|
||
{
|
||
if(!Opened) return;
|
||
|
||
auto& time = (TTime&)Time;
|
||
// 计数器记录保存时间以来经过的毫秒数
|
||
uint ms = RTC_GetCounter();
|
||
// 采用第二个后备寄存器保存秒以上的数据
|
||
uint sec = ReadBackup(2);
|
||
// 谨记sec + ms/1000就是当前绝对时间，要减去系统启动以来的总秒数，才能作为系统基准时间
|
||
time.BaseSeconds = sec + (ms / 1000) - time.Seconds;
|
||
}
|
||
|
||
void HardRTC::SaveTime()
|
||
{
|
||
if(!Opened) return;
|
||
|
||
if(g_NextSave > 0 && Time.Seconds < g_NextSave) return;
|
||
#if TIME_DEBUG
|
||
if(g_NextSave == 0)
|
||
{
|
||
debug_printf("LoadTime: ");
|
||
DateTime::Now().Show(true);
|
||
}
|
||
#endif
|
||
|
||
/* 等待最近一次对RTC寄存器的写操作完成，也即等待RTC寄存器同步 */
|
||
RTC_WaitForSynchro();
|
||
|
||
uint sec = Time.BaseSeconds + Time.Seconds;
|
||
uint ms = (uint)(Time.Current() - Time.Milliseconds);
|
||
#if TIME_DEBUG
|
||
debug_printf("SaveTime %ds %dms\r\n", sec, ms);
|
||
#endif
|
||
// 绝对总秒数存储后备寄存器
|
||
WriteBackup(2, sec);
|
||
// 剩余毫秒数设置计数器
|
||
RTC_SetCounter(ms);
|
||
|
||
// 必须打开时钟和后备域，否则写不进去时间
|
||
// Check if the Power On Reset flag is set
|
||
//RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
|
||
|
||
/* Allow access to BKP Domain */
|
||
//PWR_BackupAccessCmd(ENABLE);
|
||
|
||
// 这里对时间要求非常苛刻，不能等待
|
||
RTC_WaitForLastTask2();
|
||
|
||
// 每秒钟保存一次
|
||
g_NextSave = Time.Seconds + 5;
|
||
}
|
||
|
||
// 暂停系统一段时间
|
||
int HardRTC::Sleep(int ms)
|
||
{
|
||
if(!Opened || !LowPower) return ms;
|
||
|
||
if(ms <= 0) return 0;
|
||
//int second = ms / 1000;
|
||
//if(second <= 0) return;
|
||
|
||
#if TIME_DEBUG
|
||
debug_printf("进入低功耗模式 %d 毫秒\r\n", ms);
|
||
#endif
|
||
//SaveTime();
|
||
|
||
// 打开RTC报警中断
|
||
RTC_ITConfig(RTC_IT_ALR, ENABLE);
|
||
// 设定报警时间
|
||
RTC_SetAlarm(RTC_GetCounter() + ms);
|
||
//RTC_SetCounter(0);
|
||
//RTC_SetAlarm(ms);
|
||
// 等待写入操作完成
|
||
RTC_WaitForLastTask2();
|
||
|
||
Sys.Trace(1);
|
||
// 进入低功耗模式
|
||
//PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
|
||
// 直接进入低功耗，不去控制电源，唤醒以后不需要配置系统时钟
|
||
__WFI();
|
||
|
||
//debug_printf("离开低功耗模式\r\n");
|
||
|
||
return 0;
|
||
}
|
||
|
||
uint HardRTC::ReadBackup(byte addr)
|
||
{
|
||
if(!Opened) return 0;
|
||
|
||
// BKP寄存器是16位，小端写入
|
||
uint v = BKP_ReadBackupRegister(BKP_DR1 + (addr << 2));
|
||
addr++;
|
||
v |= BKP_ReadBackupRegister(BKP_DR1 + (addr << 2)) << 16;
|
||
|
||
return v;
|
||
}
|
||
|
||
void HardRTC::WriteBackup(byte addr, uint value)
|
||
{
|
||
if(!Opened) return;
|
||
|
||
// BKP寄存器是16位，小端写入
|
||
BKP_WriteBackupRegister(BKP_DR1 + (addr << 2), value & 0xFFFF);
|
||
addr++;
|
||
BKP_WriteBackupRegister(BKP_DR1 + (addr << 2), value >> 16);
|
||
}
|
||
|
||
// 从停止模式醒来后配置系统时钟，打开HSE/PLL，选择PLL作为系统时钟源
|
||
void SYSCLKConfig_STOP(void)
|
||
{
|
||
/* Enable HSE */
|
||
RCC_HSEConfig(RCC_HSE_ON);
|
||
|
||
/* Wait till HSE is ready */
|
||
if(RCC_WaitForHSEStartUp() == SUCCESS)
|
||
{
|
||
#ifdef STM32F10X_CL
|
||
/* Enable PLL2 */
|
||
RCC_PLL2Cmd(ENABLE);
|
||
|
||
/* Wait till PLL2 is ready */
|
||
while(RCC_GetFlagStatus(RCC_FLAG_PLL2RDY) == RESET);
|
||
#endif
|
||
|
||
/* Enable PLL */
|
||
RCC_PLLCmd(ENABLE);
|
||
|
||
/* Wait till PLL is ready */
|
||
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
|
||
|
||
/* Select PLL as system clock source */
|
||
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
|
||
|
||
/* Wait till PLL is used as system clock source */
|
||
while(RCC_GetSYSCLKSource() != 0x08);
|
||
}
|
||
}
|
||
|
||
void AlarmHandler(ushort num, void* param)
|
||
{
|
||
SmartIRQ irq;
|
||
|
||
Sys.Trace(4);
|
||
//HardRTC* rtc = (HardRTC*)param;
|
||
|
||
if(RTC_GetITStatus(RTC_IT_ALR) != RESET)
|
||
{
|
||
EXTI_ClearITPendingBit(EXTI_Line17);
|
||
// 检查唤醒标志是否设置
|
||
if(PWR_GetFlagStatus(PWR_FLAG_WU) != RESET) PWR_ClearFlag(PWR_FLAG_WU);
|
||
RTC_WaitForLastTask2();
|
||
RTC_ClearITPendingBit(RTC_IT_ALR);
|
||
RTC_WaitForLastTask2();
|
||
}
|
||
//SYSCLKConfig_STOP();
|
||
//rtc->LoadTime();
|
||
|
||
#if TIME_DEBUG
|
||
debug_printf("离开低功耗模式\r\n");
|
||
#endif
|
||
}
|