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uthman77
Joined: 20 Oct 2013
Posts: 4
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| pic microcontroller 16f887 |
 Posted: Sun Oct 20, 2013 9:55 am |
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Please I have problem with this project I am working on. I want to know if I miss something in the code. Its working fine on Proteus but the display is not working fine on board.
| Code: |
#include <16F887.h>
#use delay(clock=20000000)
#fuses XT,NOWDT,NOLVP
#use rs232(baud=9600,xmit =PIN_C6, rcv = PIN_C7)
#include "lcd.c"
//RTC variables
#define XTAL_FREQUENCY 4000000
#define TIMER1_FREQUENCY (XTAL_FREQUENCY / 4) // 1 clock tick = 1 instr. cycle = crystal frequency / 4
int32 Ticker;
int8 Seconds=0;
int8 Year=13,Month=06,Days=24,Hours=23,Minutes=55;
// Test whether a given year is a leap year.
#define IS_LEAP(year) (year%4 == 0)
// Initialize RTC
void Initialize_RTC(void)
{
Ticker = TIMER1_FREQUENCY; // initialize clock counter to number of clocks per second
setup_timer_1( T1_INTERNAL | T1_DIV_BY_1 ); // initialize 16-bit Timer1 to interrupt
// exactly every 65536 clock cycles
// (about 76 times per second)
enable_interrupts( INT_TIMER1 ); // Start RTC
}
#int_TIMER1
void TIMER1_isr()
{
Ticker -= 65536; // Decrement ticker by clocks per interrupt
if ( Ticker < 65536 ) // If second has expired
{ Ticker += TIMER1_FREQUENCY; // Increment ticker by clocks per second
seconds++; // Increment number of seconds
}
if(Seconds == 60) {Minutes++; Seconds=0;
if(Minutes == 60) {Hours++; Minutes=0;
if(Hours == 24) {Days++; Hours=0;
if ( (Days == 29 && Month==2 && !IS_LEAP(Year))
|| (Days == 30 && Month==2)
|| (Days == 31 && (Month==4 || Month==6 || Month==9 || Month==11 ))
|| (Days == 32)
) {Month++;Days=0;}
if(Month == 13) {Year++; Month=0;}
}}}
}
void main()
{
int8 prev_second;
Initialize_RTC();
enable_interrupts( GLOBAL );
lcd_init();
// loop forever
while(true)
{
if (seconds != prev_second)
{
prev_second = seconds;
lcd_gotoxy(2,1);
printf(lcd_putc,"Date:");
lcd_gotoxy(7,1);
printf(lcd_putc," %d:%d:%d \r\n",Days,Month,Year);
lcd_gotoxy(2,2);
printf(lcd_putc,"Time:");
lcd_gotoxy(7,2);
printf(lcd_putc," %d:%d:%d \r\n",Hours,Minutes,seconds);
}
}
} |
http://www.youtube.com/watch?v=IV1s6n1Apt0
http://www.microscale-embedded.com/blog/?p=157#comment-362
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ALWAYS TRUST IN GOD. |
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dyeatman
Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK
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| Posted: Sun Oct 20, 2013 10:13 am |
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In the video it looks like it is working properly then something changes
but you dont indicate what you are doing when the display messes up.
It is working and then goes crazy so offhand it looks like a
connection problem if I were to make a wild guess.
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Oct 20, 2013 10:33 am |
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| Quote: | | but the display is not working fine on board. |
Look closely at your program. It's packed full of inconsistencies.
For example, you have #use delay() set for 20 MHz, presumably because
your board has a 20 MHz crystal on the PIC. But then you use an XT
oscillator fuse. But the PIC data sheet says to use HS for 20 MHz.
The 20 MHz crystal won't run with an XT fuse. It runs on Proteus
because Proteus doesn't care about oscillator fuses. Real boards really care:
| Quote: | #include <16F887.h>
#use delay(clock=20000000)
#fuses XT,NOWDT,NOLVP
#use rs232(baud=9600,xmit =PIN_C6, rcv = PIN_C7)
#include "lcd.c" |
Again, in the code below you have an oscillator speed mistake. Your
#use delay() is set for 20 MHz, but your #define for Xtal (means crystal)
frequency is set for only 4 MHz. Fix it.
| Quote: | //RTC variables
#define XTAL_FREQUENCY 4000000
#define TIMER1_FREQUENCY (XTAL_FREQUENCY / 4) // 1 clock tick = 1 instr. cycle = crystal frequency / 4
int32 Ticker;
int8 Seconds=0; |
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uthman77
Joined: 20 Oct 2013
Posts: 4
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| Posted: Sun Oct 20, 2013 3:19 pm |
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THANKS FOR YOUR FEED BACKS @PCM PROGRAMMER, U MEAN I SHOULD DELETE THE #FUSE LINE OF THE CODE AND ALSO CHANGE BOTH DELAY TO 4MHZ?
_________________
ALWAYS TRUST IN GOD. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Oct 20, 2013 3:23 pm |
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| Post a link to the website for your PIC board (the website of the manufacturer of your board). |
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uthman77
Joined: 20 Oct 2013
Posts: 4
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| Posted: Sun Oct 20, 2013 3:28 pm |
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YOU MEAN THE MANUFACTURER OF MY BREAD BOARD IF YOU DONT MIND LET ME HAVE YOUR MAIL ITS EASIER TO SEND YOU THE CIRCUIT DIAGRAM AND EVERYTHING..PLEASE I WILL BE VERY GLAD.
_________________
ALWAYS TRUST IN GOD. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Oct 20, 2013 3:50 pm |
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I'm not giving out my email.
Just look at your board and see if your board has a crystal for the PIC.
If it has a crystal, read the frequency on the crystal and post it here. |
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uthman77
Joined: 20 Oct 2013
Posts: 4
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| Posted: Sun Oct 20, 2013 3:56 pm |
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if u are asking the value of the crystal i used i use a crystal of 4khz it was written on it sjk 4.000...i think now i figure out a mistake am supposed to use 4mhz.
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