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salgulsen
Joined: 16 Sep 2009
Posts: 21
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| Having problems with PIC18F4620 I/Os |
 Posted: Thu Mar 10, 2011 2:27 pm |
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Hello,
I'm trying this code to display a message.
I can use the same i/o's with 16F877a (the LCD shows the message) but can't use them with 18f4620 to drive a 4x20 lcd with flex lcd driver
I thought the ECCP pins or the Interrupt activated portb pins were the problem but it seems like they are not.
The code is :
| Code: | #include <18f4620.h>
#Fuses HS,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD
#device ADC=16
#use delay(clock=20000000)
#use rs232(baud=19200, xmit=pin_C6, rcv=pin_C7, parity=N, stop=1)
#byte P1B = 0xFBD
#byte PORTD = 0xF83
#byte TRISD = 0xF95
#byte PORTB = 0xF81
#byte TRISB = 0xF93
#define cs PIN_C2
#define clk PIN_C3
#define sdo PIN_C5
#include <Flex_LCD420_2Proto.c>
#include <stdlib.h>
#include <math.h>
#include <Button.c>
void lcd_welcome()
{
lcd_gotoxy(1,1);
printf(lcd_putc," *****v0.7***** ");
Delay_ms(2000);
printf(lcd_putc,"\f");
}
void main()
{
port_b_pullups(TRUE);
setup_adc(ADC_CLOCK_DIV_64); //6.4 us de bir data oku =*250 = 1.6 ms
//setup_adc_ports(AN0_TO_AN1);
P1B = 0;
PORTD = 0;
PORTB = 0;
TRISD = 0;
TRISB = 0;
setup_psp(PSP_DISABLED);
setup_spi(SPI_MASTER|SPI_H_TO_L|SPI_CLK_DIV_64);
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);
setup_ccp1(CCP_OFF);
disable_interrupts(global);
lcd_init();
Store_Custom_Char();
lcd_welcome();
while (1){
lcd_welcome();
output_high(pin_A2);
delay_ms(500);
output_low(pin_A2);
delay_ms(500);
}
}
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The LCD pins are :
| Code: |
// Flex_LCD420.c
// These pins are for my Microchip PicDem2-Plus board,
// which I used to test this driver.
// An external 20x4 LCD is connected to these pins.
// Change these pins to match your own board's connections.
#define LCD_DB4 PIN_D4
#define LCD_DB5 PIN_D5
#define LCD_DB6 PIN_D6
#define LCD_DB7 PIN_D7
#define LCD_RS PIN_B2
#define LCD_RW PIN_B4
#define LCD_E PIN_B5
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Thanks for your help... |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Mar 10, 2011 3:40 pm |
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| What is your CCS compiler version ? |
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salgulsen
Joined: 16 Sep 2009
Posts: 21
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| Posted: Thu Mar 10, 2011 5:02 pm |
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| my compiler version is 4.104 |
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salgulsen
Joined: 16 Sep 2009
Posts: 21
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| Posted: Fri Mar 11, 2011 2:39 pm |
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I'm still out of clue what can cause the problem...  |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Mar 11, 2011 3:09 pm |
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Delete 90% of your code and try a very simple test program:
| Code: |
#include <18F4620.h>
#fuses INTRC_IO, NOWDT, BROWNOUT, PUT, NOLVP
#use delay(clock=4M)
#include <Flex_LCD420.c>
//=========================================
void main()
{
lcd_init();
lcd_putc("Hello World");
while(1);
} |
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