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hayee
Joined: 05 Sep 2007
Posts: 252
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| display data from eeprom to LCD |
 Posted: Sat Sep 08, 2007 4:35 am |
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HI,everyone
I am using ccs c compiler version 4.020 and controller PIC 16f877a.i am using LCD(LMB202D).i am making a test program in which i enter any number from keypad and that number will store in eeprom and then display on LCD.when i enter any number it will store in eeprom at desire location.I want to display the data on my lcd which is stored in the eeprom.how i display my data on LCD and where i define this in the code.i am using LCD.c as a driver file which is in the driver folder of ccs compiler.i am checking my program through serial communication on pc(hyper terminal) right now.my code is as follows
| Code: |
#include <16F877A.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES PUT //Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#use delay(clock=20000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#include "eeprom.h"
#include "ctype.h"
#include "string.h"
char str[17];
char a[16]="TESTING EEPROM";
#define r1 PIN_B0
#define r2 PIN_B1
#define r3 PIN_B2
#define r4 PIN_B3
#define c1 PIN_B4
#define c2 PIN_B5
#define c3 PIN_B6
#define c4 PIN_B7
#include "lcd.c"
int key();
BYTE gethex();
BYTE gethex1();
void main()
{
BYTE i,address,value;
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
SET_TRIS_B(0xF0);
// TODO: USER CODE!!
initLCD();
printStringXY_LCD(a,0,0);
do
{
printf("\r\n\n TESTING EEPROM:\r\n\n");
for(i=1;i<=3;i++)
{
printf(" %x",read_eeprom(i));
}
printf("\r\n\n LOCATION TO CHANGE:\r\n");
address=gethex();
printf("\r\n\n NEW VALUE:\r\n");
value=gethex();
write_eeprom(address,value);
}
while(1);
}
BYTE gethex()
{
int hi,b,lo;
{
hi=gethex1();
if (hi!=255)
{
for(b=0;b<10;b++)
delay_ms(10);
}
else
continue;
lo=gethex1();
if (lo!=255)
{
for (b=0;b<10;b++)
delay_ms(10);
}
else
continue;
}
if (lo==221)
return(hi);
else
return (hi*16+lo);
}
BYTE gethex1()
{
char digit;
digit=key();
printf("%d",digit);
delay_ms(10);
return (digit);
}
int key()
{
while(1)
{
output_bit(r1,0);
output_bit(r1,1);
delay_ms(10);
if (input(c1))
return (0x0a);
if (input(c2))
return (3);
if (input(c3))
return (2);
if (input(c4))
return (1);
output_bit(r1,0);
output_bit(r2,1);
delay_ms(10);
if (input(c1))
return (0x0b);
if (input(c2))
return (6);
if (input(c3))
return (5);
if (input(c4))
return (4);
output_bit(r2,0);
output_bit(r3,1);
delay_ms(10);
if (input(c1))
return (0x0c);
if (input(c2))
return (9);
if (input(c3))
return (8);
if (input(c4))
return (7);
output_bit(r3,0);
output_bit(r4,1);
delay_ms(10);
if (input(c1))
return (0x0f);
if (input(c2))
return (0x0e);
if (input(c3))
return (0);
if (input(c4))
return (0x0d);
output_bit(r4,0);
}
} |
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Humberto
Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata
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| Posted: Sat Sep 08, 2007 8:12 am |
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| Code: |
do
{
printf("\r\n\n TESTING EEPROM:\r\n\n");
for(i=1;i<=3;i++)
{
printf(" %x",read_eeprom(i));
}
printf("\r\n\n LOCATION TO CHANGE:\r\n");
address=gethex();
printf("\r\n\n NEW VALUE:\r\n");
value=gethex();
write_eeprom(address,value);
}while(1);
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This is a never ending loop, that means that can enter, but never leave it.
PCM_Programmer in a previous post tell you:
| Quote: |
1. Post your code with proper indentation and formatting, so it looks
good and is easy to read.
Post it in a "code block" to preserve the indentation. Use the Code
button to do this. Use the Preview button to check that it looks
correct (in a Code block) before you click the Submit button.
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Reading your code with proper identation, this first error become visible at first glance.
Humberto |
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hayee
Joined: 05 Sep 2007
Posts: 252
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| Posted: Sun Sep 09, 2007 3:41 am |
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HI,
i am not getting ur and PCM_PROGRAMMER point.how i write my question so that all of u can understand that.i have already mentioned the compiler version,lcd no,pic controller and the program in a code section.now what i have to do i am not understanding. |
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