Real time clock with LCD by using pic16f877a

[IsaacChuah90]

Hi guys.I'm using pic16f877a instead of using pic16f876a,and I connect all the components including real time clock and LCD according to the schematic shown in pr12,the LCD can't show the time,it just show nothing.and I programmed the sample code inside the pic16f877a which include c file and hex file from pr12.it can't work..seeking for help.thanks!!!

[shahrul]

If using RTC with PIC16F877A, see this free code.

[IsaacChuah90]

Ok...so just use the microchip HI-TECH ANSI C will do right?Just follow the Lesson Mplab in one of your replied comment will right?The coding need to modify if I'm using 16 by 2 lcd instead of using 20 by 4 lcd?because the lcd you using is different with me.thanks for help.New to programming.hope you don't mind.

[ober]

Hi, the sample source code for all DIY has been verified, including the schematic. Many has use it and works fine.

A photo of your hardware would be useful.

[IsaacChuah90]

Dear Ober Choo,
I connect all the components according to the schematic of the pr12,I just change the pic to pic16f877a instead of using pic16f876a but it can't work.Izit the coding problem or what?thanks for help.

[shahrul]

Ok...so just use the microchip HI-TECH ANSI C will do right?Just follow the Lesson Mplab in one of your replied comment will right?The coding need to modify if I'm using 16 by 2 lcd instead of using 16 by 4 lcd?because the lcd you using is different with me.thanks for help.New to programming.hope you don't mind.

The code for LCD 20X4 is same with LCD 16X2.

[kl84]

876A has less pins compare to 877A. Make sure all the pins defined in the software are correctly connected. Don't forget Config >> Select Device too.

[robosang]

Many has also follow schematic and connect everything, but at the end found that the hardware is not exactly same as schematic.... like Allen once say, I follow the recipe and cook the cake, but the taste is not good, why?

So the picture of your board is critical. Otherwise I would suggest you to test the LED on your board, write a simple program to blink the LED. This is to ensure PIC is working.

[IsaacChuah90]

I m sure tat all the pins defined in the software are correctly connected according to the schematic shown in pr12 diy project.I connected my LCD and ds1307 rtc according to the schematic already but it still cant work.the lcd just got light and show nothing.Izit the source code of pr12 used in pic16f876a is different when used in pic16f877a?seeking for helps.Thanks!

[shahrul]

I m sure tat all the pins defined in the software are correctly connected according to the schematic shown in pr12 diy project.I connected my LCD and ds1307 rtc according to the schematic already but it still cant work.the lcd just got light and show nothing.Izit the source code of pr12 used in pic16f876a is different when used in pic16f877a?seeking for helps.Thanks!

Actually, coding for PIC16F876A is exactly same with PIC16F877A. If you follow same port for PIC16F876A into PIC16F877A, it's can working.

Since, we are not see your hardware, many expectation we can do.
1) Is that you use right crystal type?
2) Is that your PIC circuit working? To sure that, try to do very simple program like on/off LED.
3) When your PIC circuit working, is that your LCD circuit working? If not, try to check LCD connection or try change to another LCD.