topic Re: RTC Initialization issue with LPC4367 in LPC Microcontrollers

RTC Initialization issue with LPC4367

gauravmore — Sat, 11 May 2019 09:39:32 GMT

I am LPC4367 and I am testing internal RTC with my customize development board of my project. I am facing issue with RTC init . Follwing is the initialization sequence

Chip_Clock_RTCEnable();

/* 2-Second delay after enabling RTC clock */
LPC_ATIMER->DOWNCOUNTER = 2048;
while (LPC_ATIMER->DOWNCOUNTER);

/* Disable RTC */
Chip_RTC_Enable(pRTC, DISABLE);

/* Disable Calibration */
Chip_RTC_CalibCounterCmd(pRTC, DISABLE);

/* Reset RTC Clock */
Chip_RTC_ResetClockTickCounter(pRTC);

/* Clear counter increment and alarm interrupt */
pRTC->ILR = RTC_IRL_RTCCIF | RTC_IRL_RTCALF;
while (pRTC->ILR != 0) {}

/* Clear all register to be default */
pRTC->CIIR = 0x00;
pRTC->AMR = 0xFF;
pRTC->CALIBRATION = 0x00;

But when i runt the code in debug mode using LPClink2 ,

The program was unable to run through the do-while loop after the LPC_RTC->CCR |= RTC_CCR_CTCRST statement inside "Chip_RTC_ResetClockTickCounter(pRTC);". Then it crashed eventually. What is the problem? Please help!

But the same code when I run with the evaluation board OM13088 then it work fine. I have attached the project for your reference.

I also refered https://community.nxp.com/thread/438393 but there also no such solution found.

Thanks,

Gaurav More

Re: RTC Initialization issue with LPC4367

gauravmore — Mon, 13 May 2019 10:57:44 GMT

Hi,

Any input regarding the query ?. Please share the same since it is required in my project

Thanks

Gaurav More

Re: RTC Initialization issue with LPC4367

Alice_Yang — Tue, 14 May 2019 10:06:59 GMT

Hello Gaurav More,

If the project can work well on demo board, while failed on your custom board,

I think you need check your hardware, also I will use a LPClink2 to debug your project, will

tell you the result .ASAP.

Alice

Re: RTC Initialization issue with LPC4367

gauravmore — Wed, 15 May 2019 03:40:22 GMT

Hi Alice,

I checked the hardware of OM13088 with respect to the RTC Circuit and also compared it with the customized the board circuit. Check for the attached schematic for the same.

the controller used in the eval board is LPC4367JET100 and programming is done using the LPClink2 debugger.

Also the schematic of the customize board given below

The controller used is LPC4367JBD208E. But the same code is working fine with the eval board. also i tried to chec by shorting the crystal Y2 and checked whether it stuck in the code but it worked fine and I am able to reset the RTC using

LPC_RTC->CCR |= RTC_CCR_CTCRST this statement while the same code stuck in thei line and the code crashes.

Let me know if I am missing any initialization routine. also one more thing I am using LPCLink2 debugger of OM13088 to debug my customize board.

Waiting for your reply.

Thanks

Gaurav More

Re: RTC Initialization issue with LPC4367

gauravmore — Thu, 16 May 2019 06:34:20 GMT

Hi Alice,

RTC Issue resolved.

I checked the hardware the compare it with eval board the problem was related to the crystal. It was connected in reverse. made the modification and checked. it is working .

Thanks

Gaurav More

Re: RTC Initialization issue with LPC4367

Alice_Yang — Fri, 17 May 2019 01:57:37 GMT

Hello Gaurav More,

OK，thanks for your sharing, I have test your code on my side, it can work well.

Alice