为什么使用RTC时间不增加

[hehung]

使用了板载的RTC，用的例程发现时间并没有增加<!–more–>

 

int main(void)
{
uint32_t sec;
uint32_t currSeconds;
uint8_t index;
rtc_datetime_t date;
rtc_config_t rtcConfig;

/* Board pin, clock, debug console init */
BOARD_InitPins();
BOARD_BootClockRUN();
BOARD_InitDebugConsole();
/* Init RTC */
/*
* rtcConfig.wakeupSelect = false;
* rtcConfig.updateMode = false;
* rtcConfig.supervisorAccess = false;
* rtcConfig.compensationInterval = 0;
* rtcConfig.compensationTime = 0;
*/
RTC_GetDefaultConfig(&rtcConfig);
RTC_Init(RTC, &rtcConfig);
/* Select RTC clock source */
RTC_SetClockSource(RTC);

PRINTF(“RTC example: set up time to wake up an alarm\r\n”);

/* Set a start date time and start RT */
date.year = 2019U;
date.month = 10U;
date.day = 25U;
date.hour = 19U;
date.minute = 0;
date.second = 0;

/* RTC time counter has to be stopped before setting the date & time in the TSR register */
RTC_StopTimer(RTC);
/* Set RTC time to default */
RTC_SetDatetime(RTC, &date);
/* Enable RTC alarm interrupt */
// RTC_EnableInterrupts(RTC, kRTC_AlarmInterruptEnable);
/* Enable at the NVIC */
// EnableIRQ(RTC_IRQn);
/* Start the RTC time counter */
RTC_StartTimer(RTC);

/* This loop will set the RTC alarm */
while (1)
{
busyWait = true;
index = 0;
sec = 0;
/* Get date time */
RTC_GetDatetime(RTC, &date);

/* print default time */
PRINTF(“Current datetime: %04hd-%02hd-%02hd %02hd:%02hd:%02hd\r\n”,
date.year,
date.month,
date.day,
date.hour,
date.minute,
date.second);

for(int m = 0;m<10;m++)
{
for (int i = 0; i < 800000; ++i)
{
__asm(“NOP”); /* delay */
}
}
}
}

 

下面是串口收到的时间，并没有增加，已经过了几十秒了，，还是最开始设定的时间

Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00
Current datetime: 2019-10-25 19:00:00

[Howard]

板载的RTC指的是什么？芯片内部的RTC吗？请参考下面例子：

rv32m1_sdk_riscv\boards\rv32m1_vega\driver_examples\rtc

[hehung]

就是用的这个例程，但是时间并不会增加，用的内部rtc

[Howard]

怎么可能，你直接编译运行那个例子看看时间能不能变。然后检查一下你的代码，看看个地方有问题。

[作者]

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