He estado intentando escribir un programa para LCD en PIC18f452
. Encontré una biblioteca y trabajé en ella y MPLAB XC8 la compiló con éxito. Lo probé en ISIS y mostró resultados perfectos. Sin embargo, cuando grabé el programa, el hardware del controlador se negó a mostrar nada. Luego porté el mismo código en MikroC
- solo hice un ligero cambio al reemplazar __delay_us
y __delay_ms
con las rutinas de retardo disponibles en MikroC
. Para mi sorpresa, tanto el Proteus como el hardware funcionaron como un encanto.
Estoy confundido de que los bits de configuración son los mismos para MPLAB
y MikroC
. ¿Dónde está la diferencia? Sospecho que tiene algo que ver con la velocidad de retraso o algo así ...
El código para main es el siguiente porque es lo que yo cambio
#include <xc.h>
#include <p18f452.h>
#include "lcd.h"
#define _XTAL_FREQ 8000000L
// CONFIG1H
#pragma config OSC = HS // Oscillator Selection bits (HS oscillator)
#pragma config OSCS = OFF // Oscillator System Clock Switch Enable bit (Oscillator system clock switch option is disabled (main oscillator is source))
// CONFIG2L
#pragma config PWRT = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOR = ON // Brown-out Reset Enable bit (Brown-out Reset enabled)
#pragma config BORV = 20 // Brown-out Reset Voltage bits (VBOR set to 2.0V)
// CONFIG2H
#pragma config WDT = OFF // Watchdog Timer Enable bit (WDT disabled (control is placed on the SWDTEN bit))
#pragma config WDTPS = 128 // Watchdog Timer Postscale Select bits (1:128)
// CONFIG3H
#pragma config CCP2MUX = ON // CCP2 Mux bit (CCP2 input/output is multiplexed with RC1)
// CONFIG4L
#pragma config STVR = ON // Stack Full/Underflow Reset Enable bit (Stack Full/Underflow will cause RESET)
#pragma config LVP = ON // Low Voltage ICSP Enable bit (Low Voltage ICSP enabled)
// CONFIG5L
#pragma config CP0 = OFF // Code Protection bit (Block 0 (000200-001FFFh) not code protected)
#pragma config CP1 = OFF // Code Protection bit (Block 1 (002000-003FFFh) not code protected)
#pragma config CP2 = OFF // Code Protection bit (Block 2 (004000-005FFFh) not code protected)
#pragma config CP3 = OFF // Code Protection bit (Block 3 (006000-007FFFh) not code protected)
// CONFIG5H
#pragma config CPB = OFF // Boot Block Code Protection bit (Boot Block (000000-0001FFh) not code protected)
#pragma config CPD = OFF // Data EEPROM Code Protection bit (Data EEPROM not code protected)
// CONFIG6L
#pragma config WRT0 = OFF // Write Protection bit (Block 0 (000200-001FFFh) not write protected)
#pragma config WRT1 = OFF // Write Protection bit (Block 1 (002000-003FFFh) not write protected)
#pragma config WRT2 = OFF // Write Protection bit (Block 2 (004000-005FFFh) not write protected)
#pragma config WRT3 = OFF // Write Protection bit (Block 3 (006000-007FFFh) not write protected)
// CONFIG6H
#pragma config WRTC = OFF // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) not write protected)
#pragma config WRTB = OFF // Boot Block Write Protection bit (Boot Block (000000-0001FFh) not write protected)
#pragma config WRTD = OFF // Data EEPROM Write Protection bit (Data EEPROM not write protected)
// CONFIG7L
#pragma config EBTR0 = OFF // Table Read Protection bit (Block 0 (000200-001FFFh) not protected from Table Reads executed in other blocks)
#pragma config EBTR1 = OFF // Table Read Protection bit (Block 1 (002000-003FFFh) not protected from Table Reads executed in other blocks)
#pragma config EBTR2 = OFF // Table Read Protection bit (Block 2 (004000-005FFFh) not protected from Table Reads executed in other blocks)
#pragma config EBTR3 = OFF // Table Read Protection bit (Block 3 (006000-007FFFh) not protected from Table Reads executed in other blocks)
// CONFIG7H
#pragma config EBTRB = OFF // Boot Block Table Read Protection bit (Boot Block (000000-0001FFh) not protected from Table Reads executed in other blocks)
//Simple Delay Routine
void Wait(unsigned int delay)
{
for(;delay;delay--)
__delay_us(100);
}
void main()
{
//Let the Module start up
Wait(500);
PORTD = 0x00;
TRISD = 0x00;
//Initialize the LCD Module
LCDInit(LS_BLINK);
//Clear the Module
LCDClear();
//Write a string at current cursor pos
LCDWriteString("F**k Yeh!!");
Wait(20000);
//Now Clear the display
LCDClear();
LCDWriteString("God Bless all !!");
//Goto POS (X=0,Y=1 i.e. Line 2)
//And Write a string
LCDWriteStringXY(5,1,"<**************>");
Wait(20000);
//Write Some Numbers
for(char i=0;i<100;i++)
{
LCDClear();
LCDWriteInt(i,3);
Wait(3000);
}
LCDClear();
LCDWriteString(" The End ");
//Loop Forever
while(1)
{
PORTD = ~PORTD;
}
}
Los bits de configuración vistos por PICkit2 desde archivos hexadecimales compilados mi MPLAB y MikroC son