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GLCD AND DS1307 PROBLEM!

 
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fiasgardone



Joined: 19 Jan 2010
Posts: 71

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GLCD AND DS1307 PROBLEM!
PostPosted: Mon Mar 28, 2011 9:57 am     Reply with quote
Hello gentlemen!

I have a problem with my GLCD and DS1307, the DS1307 sends the time for the GLCD and shows the beginning and then it gets much all characters all white! as shown in photos
How to solve this!

When I turn, all good



And then it gets so?!


the code
Code:
#include <18f452.h>                   
#FUSES NOWDT                    //No Watch Dog Timer
#FUSES HS                       //High speed Osc (> 4mhz)
#FUSES NOPROTECT                //Code not protected from reading
#FUSES NOBROWNOUT               //Reset when brownout detected
#FUSES NOPUT                    //No Power Up Timer
#FUSES NODEBUG                  //No Debug mode for ICD
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
                                                     //CRISTAL
#use delay(clock=20000000)               //A 20MHZ

#include <HDM64GS12.c>
#include <graphics.c>
#
#include <DS1307.c>


#use standard_io(a)
#use standard_io(e)
#use standard_io(c)


#define DAL_SCL PIN_C2
#define DAL_SDA PIN_C3

char  v_sec[2]; //
char  v_min[2];  //
char  v_hrs[2];
char  v_day[2];
char  v_month[2];
char  v_yr[2];
char  v_dow[2];


main() {

BYTE sec,min,hrs,day,month,yr,dow;
setup_ccp1(ccp_off);
setup_ccp2(ccp_off);

ds1307_init();//

glcd_init(ON);   //
glcd_fillScreen(OFF);



glcd_rect(0,0,127,15,0,1);

while(true){


//ds1307_get_date(day,month,yr,dow);
ds1307_get_time(hrs,min,sec);

sprintf(v_hrs,"%02u",hrs);
glcd_text57(5,5,v_hrs,1,on);

sprintf(v_min,"%02u",min);
glcd_text57(20,5,v_min ,1,on);

sprintf(v_sec,"%02u",sec);
glcd_text57(35,5,v_sec ,1,on);
delay_ms(700);
}
}
[/url]
temtronic



Joined: 01 Jul 2010
Posts: 9226
Location: Greensville,Ontario

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PostPosted: Mon Mar 28, 2011 11:47 am     Reply with quote
You could have 3 or 4 areas of problems.
1) the RTC chip
2) the GLCD
3) the wiring..though it seems OK...
4) the program

I'd do the following..

1)remove all the RTC code and create 3 simple counters( hrs,min,sec) to simulate the RTC data. Have them incremented every second using delay_ms(1000) and then sent to the display, loop for 00 to 60, forever.
Don't worry about illegal 'time' like 33 hours...you're testing the GLCD to be sure it'll display data correctly.

This will show if the GLCD is working right.If it displays properly, perhaps you have a bad RTC chip.

2) to verify the RTC chip , cut code to send the data via RS232 to a PC or terminal. If this shows correctly, then the RTC chip should be fine.

2a) haven't looked at the RTC driver, but some RTC require an 'enable' line or bitset to NOT read the RTC data while it's updataing the time internally.

2b) if I2C bus, you need proper pullup resistors for your speed and VDD.

2c) also disable any other peripheral that might be muxed onto the RTC pins...

3) hardware..be sure to have bypass caps near each chip, real good grounds and a stable power supply with more power than required.
fiasgardone



Joined: 19 Jan 2010
Posts: 71

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PostPosted: Mon Mar 28, 2011 12:52 pm     Reply with quote
hello gentlemen

temtronic, i made ​​the counters, and the problem continues, as shown in photos.

The resistors are 4.7k pull_up.
The GLCD is new, the DS1307 is new, I think it works well! The power supply is 5 volts.

How to solve this?
Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Mar 28, 2011 1:19 pm     Reply with quote
It looks like the over-writing pixel problem.

Look at the code posted by petu65 at the end of this thread:
http://www.ccsinfo.com/forum/viewtopic.php?t=44703
He adds an "else" block after the "if" block, which turns OFF pixels
which are not used by the character font. Edit glcd.c and add the
"else" block to it. See if that fixes your problem.
fiasgardone



Joined: 19 Jan 2010
Posts: 71

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PostPosted: Tue Mar 29, 2011 1:11 pm     Reply with quote
Hello PCM programmer thanks for helping!

My GLCD not work with the library GLCD.C (not sure why), I made the driver change, but does not work!

But as you can see in the pictures with driver "HDM64GS12.c" the GLCD work, but has the problem of not showing the right numbers!

Has any driver change "HDM64GS12.c"?, searched the forum and not found

I would like what is the solution to this problem!!

thanks
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