EE302 - Lab 02

// /** * Title: LCD DEMO for use in Lab 2 tutorial * C File lcddemo.c * Platform: PICmicro PIC16F877A @ 4 Mhz * Written by: GBM * * Date: 01/10/2018 * * Function: A sample c file to show how to use the LCD display onboard * the PIC DIP-40 board. * */ // CONFIG #pragma config FOSC = XT // Oscillator Selection bits (XT oscillator) #pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled) #pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled) #pragma config BOREN = OFF // Brown-out Reset Enable bit (BOR disabled) #pragma config LVP = OFF // Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit (RB3 is digital I/O, HV on MCLR must be used for programming) #pragma config CPD = OFF // Data EEPROM Memory Code Protection bit (Data EEPROM code protection off) #pragma config WRT = OFF // Flash Program Memory Write Enable bits (Write protection off; all program memory may be written to by EECON control) #pragma config CP = OFF // Flash Program Memory Code Protection bit (Code protection off) // #pragma config statements should precede project file includes. // Use project enums instead of #define for ON and OFF. #include <xc.h> #include <stdio.h> // Include Standard I/O header file #include "ee302lcd.h" // Include LCD header file. This file must be in same // directory as source main source file. #ifndef _XTAL_FREQ // Unless already defined assume 4MHz system frequency // This definition is required to calibrate the delay functions, __delay_us() and __delay_ms() #define _XTAL_FREQ 4000000 #endif // Definitions____________________________________________________________ #define CLOSED 0 // Define switch action "Closed" as 0 #define SW1 RB0 // Assign Label SW1 to PortB bit 0 (RB0) #define SW2 RB1 // Assign Label SW2 to PortB bit 1 (RB1) #define VALUE1 123 #define VALUE2 456 // globals _____________________________________________________ unsigned char gOutString[16]; // // Prototypes_____________________________________________________________ void setup(void); // Declare setup function void loop(void); // Declare loop function void data2LCD(void); // Declare data to LCD function void lcdTitle(void); // Declare title to LCD function void clear_outString(void); // Declare outString clear function //Main program void main(void) { setup(); // Call initialisation lcdTitle(); // Call LCDTitle //Superloop for(;;) { loop(); // Write data to LCD } } void setup(void) { Lcd8_Init(); // Required initialisation of LCD to 8-bit mode TRISB=0x03; // Set PORTB bit 0 and 1 as inputs } void loop(void) { data2LCD(); } void data2LCD(void) { if (SW1 == CLOSED) // If SW1 closed then { Lcd8_Clear(); //clear LCD display clear_outString(); //clear outString array sprintf(gOutString,"Int Value1 is"); //define string as "Int Value is" Lcd8_Write_String(gOutString); //print string to LCD Lcd8_Set_Cursor(2,1); //select line 2 of LCD sprintf(gOutString," %d",VALUE1); //define intvalue as a char in outString Lcd8_Write_String(gOutString); //print string to LCD } if (SW2 == CLOSED) // If SW2 closed then { // Modulus used to help convert integer to ASCII character Lcd8_Clear(); //clear LCD display clear_outString(); //clear outString array sprintf(gOutString,"Int Value2 is"); //define string as "Int Value is" Lcd8_Write_String(gOutString); //print string to LCD Lcd8_Set_Cursor(2,7); //select line 2 of LCD clear_outString(); //clear outString array gOutString[0] = (VALUE2/100)%10 + 48; // add 48 (0x30) to remainder to offset to character in Ascii table. gOutString[1] = (VALUE2/10)%10 + 48; gOutString[2] = (VALUE2/1)%10 + 48; Lcd8_Write_String(gOutString); } } void lcdTitle(void) { Lcd8_Write_String("HAITAO"); // print "LCD Demo" on line 1 of LCD Lcd8_Set_Cursor(2,1); // select line 2 Lcd8_Write_String("DA SB"); // print "LCD Demo" on line 2 of LCD } void clear_outString(void) { int i; for (i=0; i<16; i++) { gOutString[i] = 0x00; } }