RTC initialization issue in LPC1768

Suchismita — Sun, 11 May 2025 12:05:26 GMT

Hi ,

For RTC initialization in LPC1768 I am using below code, after time is set initially , it is working fine, but after power reset it is giving garbage value, that to everytime same garbage value . Tried modifying the init block code in many ways , still error persists, any suggestion, how to resolve the issue?

void RTC_Init(void)
{
LPC_SC->PCONP |=(1<<9); // Enable the power to RTC module
/* Disable RTC clock, reset clock, Enable RTC calibration */
LPC_RTC->CCR = ((1<<SBIT_CTCRST) | (1<<SBIT_CCALEN));
LPC_RTC->CALIBRATION = 0x00;
LPC_RTC->CCR = (1<<SBIT_CLKEN); /* Enable the clock for RTC */
}

Re: RTC initialization issue in LPC1768

Alice_Yang — Mon, 12 May 2025 10:40:04 GMT

Hello @Suchismita

Please refer to the RTC demo under LPCopen, which contains detailed examples and configurations that can guide you through the implementation process.

The initialization code is as follows：

Alice

LPC MicrocontrollersのトピックRTC initialization issue in LPC1768

RTC initialization issue in LPC1768

Re: RTC initialization issue in LPC1768