164 lines
4.0 KiB
C
164 lines
4.0 KiB
C
/*
|
|
* File : stm32f1_rtc.c
|
|
* This file is part of RT-Thread RTOS
|
|
* COPYRIGHT (C) 2009, RT-Thread Development Team
|
|
*
|
|
* The license and distribution terms for this file may be
|
|
* found in the file LICENSE in this distribution or at
|
|
* http://www.rt-thread.org/license/LICENSE
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2009-01-05 Bernard the first version.
|
|
* 2011-11-26 aozima implementation time.
|
|
* 2015-07-16 FlyM rename rtc to stm32f1_rtc. remove finsh export function
|
|
*/
|
|
|
|
#include <rtthread.h>
|
|
#include <stm32f10x.h>
|
|
#include "stm32f1_rtc.h"
|
|
|
|
static struct rt_device rtc;
|
|
static rt_err_t rt_rtc_open(rt_device_t dev, rt_uint16_t oflag)
|
|
{
|
|
if (dev->rx_indicate != RT_NULL)
|
|
{
|
|
/* Open Interrupt */
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
static rt_size_t rt_rtc_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static rt_err_t rt_rtc_control(rt_device_t dev, rt_uint8_t cmd, void *args)
|
|
{
|
|
rt_time_t *time;
|
|
RT_ASSERT(dev != RT_NULL);
|
|
|
|
switch (cmd)
|
|
{
|
|
case RT_DEVICE_CTRL_RTC_GET_TIME:
|
|
time = (rt_time_t *)args;
|
|
/* read device */
|
|
*time = RTC_GetCounter();
|
|
break;
|
|
|
|
case RT_DEVICE_CTRL_RTC_SET_TIME:
|
|
{
|
|
time = (rt_time_t *)args;
|
|
|
|
/* Enable PWR and BKP clocks */
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
|
|
|
|
/* Allow access to BKP Domain */
|
|
PWR_BackupAccessCmd(ENABLE);
|
|
|
|
/* Wait until last write operation on RTC registers has finished */
|
|
RTC_WaitForLastTask();
|
|
|
|
/* Change the current time */
|
|
RTC_SetCounter(*time);
|
|
|
|
/* Wait until last write operation on RTC registers has finished */
|
|
RTC_WaitForLastTask();
|
|
|
|
BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
* Function Name : RTC_Configuration
|
|
* Description : Configures the RTC.
|
|
* Input : None
|
|
* Output : None
|
|
* Return : 0 reday,-1 error.
|
|
*******************************************************************************/
|
|
int RTC_Configuration(void)
|
|
{
|
|
u32 count=0x200000;
|
|
|
|
/* Enable PWR and BKP clocks */
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
|
|
|
|
/* Allow access to BKP Domain */
|
|
PWR_BackupAccessCmd(ENABLE);
|
|
|
|
/* Reset Backup Domain */
|
|
BKP_DeInit();
|
|
|
|
/* Enable LSE */
|
|
RCC_LSEConfig(RCC_LSE_ON);
|
|
/* Wait till LSE is ready */
|
|
while ( (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) && (--count) );
|
|
if ( count == 0 )
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
/* Select LSE as RTC Clock Source */
|
|
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
|
|
|
|
/* Enable RTC Clock */
|
|
RCC_RTCCLKCmd(ENABLE);
|
|
|
|
/* Wait for RTC registers synchronization */
|
|
RTC_WaitForSynchro();
|
|
|
|
/* Wait until last write operation on RTC registers has finished */
|
|
RTC_WaitForLastTask();
|
|
|
|
/* Set RTC prescaler: set RTC period to 1sec */
|
|
RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
|
|
|
|
/* Wait until last write operation on RTC registers has finished */
|
|
RTC_WaitForLastTask();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rt_hw_rtc_init(void)
|
|
{
|
|
rtc.type = RT_Device_Class_RTC;
|
|
|
|
if (BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)
|
|
{
|
|
rt_kprintf("rtc is not configured\n");
|
|
rt_kprintf("please configure with set_date and set_time\n");
|
|
if ( RTC_Configuration() != 0)
|
|
{
|
|
rt_kprintf("rtc configure fail...\r\n");
|
|
return ;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Wait for RTC registers synchronization */
|
|
RTC_WaitForSynchro();
|
|
}
|
|
|
|
/* register rtc device */
|
|
rtc.init = RT_NULL;
|
|
rtc.open = rt_rtc_open;
|
|
rtc.close = RT_NULL;
|
|
rtc.read = rt_rtc_read;
|
|
rtc.write = RT_NULL;
|
|
rtc.control = rt_rtc_control;
|
|
|
|
/* no private */
|
|
rtc.user_data = RT_NULL;
|
|
|
|
rt_device_register(&rtc, "rtc", RT_DEVICE_FLAG_RDWR);
|
|
|
|
return;
|
|
}
|
|
|
|
|