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oxxyfx
Joined: 24 May 2007
Posts: 97
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| LCD.C compile error |
 Posted: Wed May 05, 2010 3:14 pm |
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I am trying to interface a 18F2550 with a 2 line 8 character LCD screen. The LCD has a KS0066 controller on it.
Anyway I have the following pins connected:
RC0 = E
RC1 = R/W
RC2 = RS
D4 = RB3
D5 = RB2
D6 = RB1
D7 = RB0
These are defined as:
| Code: |
#define LCD_ENABLE_PIN PIN_C0
#define LCD_RS_PIN PIN_C2
#define LCD_RW_PIN PIN_C1
#define LCD_TYPE 1
#define LCD_DATA4 PIN_B3
#define LCD_DATA5 PIN_B2
#define LCD_DATA6 PIN_B1
#define LCD_DATA7 PIN_B0
#include <lcd.c>
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The program is really nothing I just want to see if I can display something on the LCD:
| Code: |
void main()
{
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
setup_oscillator(OSC_8MHZ|OSC_INTRC|OSC_31250|OSC_PLL_OFF);
//Setup_Oscillator parameter not selected from Intr Oscillator Config tab
// TODO: USER CODE!!
lcd_init();
lcd_putc("\fReady...\n");
while (TRUE) {
k=kbd_getc();
if(k!=0)
if(k=='*')
lcd_putc('\f');
else
lcd_putc(k);
}
}
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Whenever I am trying to compile this code it comes back with an error on the LCD.c - Unidentified identifier:
Line 133:
#byte lcdlat = LCD_DATA_PORT+9
I am not sure what I am doing wrong. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed May 05, 2010 3:59 pm |
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Post a complete (but short) compilable program. Post the #include
for the PIC, #fuses, #use delay. Post all variable declarations.
For example, your code uses 'k' but is missing the declaration for it.
Post all #include lines, such as for kbd.c.
Also post your compiler version. |
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oxxyfx
Joined: 24 May 2007
Posts: 97
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| Posted: Wed May 05, 2010 5:55 pm |
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Thank you, here is the H file:
| Code: |
#include <18F2550.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES INTRC //Crystal osc <= 4mhz for PCM/PCH , 3mhz to 10 mhz for PCD
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //No brownout reset
#FUSES BORV20 //Brownout reset at 2.0V
#FUSES NOPUT //No Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES STVREN //Stack full/underflow will cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES IESO //Internal External Switch Over mode enabled
#FUSES FCMEN //Fail-safe clock monitor enabled
#FUSES PBADEN //PORTB pins are configured as analog input channels on RESET
#FUSES NOWRTC //configuration not registers write protected
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table reads
#FUSES NOCPB //No Boot Block code protection
#FUSES MCLR //Master Clear pin enabled
#FUSES LPT1OSC //Timer1 configured for low-power operation
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)
#FUSES PLL12 //Divide By 12(48MHz oscillator input)
#FUSES CPUDIV4 //System Clock by 4
#FUSES USBDIV //USB clock source comes from PLL divide by 2
#FUSES VREGEN //USB voltage regulator enabled
#use delay(clock=8000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
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and here is the program:
| Code: |
#include "LCDTest.h"
#define LCD_ENABLE_PIN PIN_C0
#define LCD_RS_PIN PIN_C2
#define LCD_RW_PIN PIN_C1
#define LCD_TYPE 2
#define LCD_DATA4 PIN_B3
#define LCD_DATA5 PIN_B2
#define LCD_DATA6 PIN_B1
#define LCD_DATA7 PIN_B0
#include <lcd.c>
int k;
void main()
{
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
setup_oscillator(OSC_8MHZ|OSC_INTRC|OSC_31250|OSC_PLL_OFF);
lcd_init();
lcd_putc("\fReady...\n");
while (TRUE) {
k=kbd_getc();
if(k!=0)
if(k=='*')
lcd_putc('\f');
else
lcd_putc(k);
}
}
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The compiler version is 4.093 |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed May 05, 2010 6:16 pm |
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Try adding the line in bold, so it's above the #include for lcd.c.
I didn't test this in hardware, but I think that's what it needs.
| Quote: |
#define LCD_ENABLE_PIN PIN_C0
#define LCD_RS_PIN PIN_C2
#define LCD_RW_PIN PIN_C1
#define LCD_TYPE 2
#define LCD_DATA4 PIN_B3
#define LCD_DATA5 PIN_B2
#define LCD_DATA6 PIN_B1
#define LCD_DATA7 PIN_B0
#define LCD_DATA_PORT getenv("SFR:PORTB")
#include <lcd.c>
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This is a problem in your version. They fixed it in later versions. |
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oxxyfx
Joined: 24 May 2007
Posts: 97
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| Posted: Wed May 05, 2010 7:00 pm |
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Thank you, that almost fixed it. Now I am getting an error in the kbd.c:
Line 106:
case 0 : set_tris_kbd(ALL_PINS&~COL0);
unidentified identfier: set_tris_d |
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oxxyfx
Joined: 24 May 2007
Posts: 97
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| Posted: Wed May 05, 2010 7:02 pm |
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#define use_portb_kbd TRUE
inserted in the code fixed the above error as well. Thank you. |
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oxxyfx
Joined: 24 May 2007
Posts: 97
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| Posted: Wed May 05, 2010 7:20 pm |
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| Now I only have to figure out why am I not seeing anything displayed on the LCD... |
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oxxyfx
Joined: 24 May 2007
Posts: 97
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| Posted: Thu May 06, 2010 1:39 pm |
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| Got it working. The code was ok, the contrast pin required different values for the resistors. Thanks again. |
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