CHƯƠNG III : THIẾT KẾ VÀ THI CÔNG MẠCH

Hình 12: Khối xử lý



Hình 13: Khối hiển thị

3.2, Code Chương Trình Hiển Thị Điện Áp và Tần Số lên LCD

 LCD.h

#define delay_us(x) __delay_cycles(x*2ul)

#define delay_ms(x) __delay_cycles(x*1100ul)

typedef unsigned char uchar;

union reg

{ unsigned char _byte;



//khai bao 1byte



struct bit



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{



//dinh nghia bit trong byte vua khai bao



unsigned char b0:1; //bit 0 trong byte

unsigned char b1:1; //bit 1 trong byte

unsigned char b2:1; //bit 2 trong byte

unsigned char b3:1; //bit 3 trong byte

unsigned char b4:1; //bit 4 trong byte

unsigned char b5:1; //bit 5 trong byte

unsigned char b6:1; //bit 6 trong byte

unsigned char b7:1; //bit 7 trong byte

} _bit;

};

union reg* P2_dir=(union reg*)0x2a; //khai bao dia chi o nho

union reg* P2_out=(union reg*)0x29;

union reg* P2_sel=(union reg*)0x2e;

union reg* P2_in=(union reg*)0x28;

union reg* P1_sel=(union reg*)0x26;

union reg* P1_dir=(union reg*)0x22; //khai bao dia chi o nho

union reg* P1_out=(union reg*)0x21;

union reg* P1_in=(union reg*)0x20;

/********************** I/O LCD ******************************/

#define LCD_RS



P2_out->_bit.b5



#define LCD_EN



P2_out->_bit.b4



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#define LCD_D4



P2_out->_bit.b3



#define LCD_D5



P2_out->_bit.b0



#define LCD_D6



P2_out->_bit.b1



#define LCD_D7



P2_out->_bit.b2



 LCD.c

#include "LCD.h"

/***************************************************************************/

void LCD_Enable(void)

{

LCD_EN=1;

delay_us(3);

LCD_EN=0;

delay_us(50);

}

//Ham Gui 4 Bit Du Lieu Ra LCD

void LCD_Send4Bit( unsigned char Data )

{

LCD_D4=Data&0x01;

LCD_D5=(Data>>1)&1;

LCD_D6=(Data>>2)&1;

LCD_D7=(Data>>3)&1;

}



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// Ham Gui 1 Lenh Cho LCD

void LCD_SendCommand (unsigned char command )

{

LCD_Send4Bit ( command >>4 );/* Gui 4 bit cao */

LCD_Enable () ;

LCD_Send4Bit ( command );



/* Gui 4 bit thap*/



LCD_Enable () ;

}

// Ham Khoi Tao LCD

void LCD_Init ( void )

{

LCD_Send4Bit(0x00);

delay_ms(20);

LCD_RS=0;

//output_low(LCD_RW);

LCD_Send4Bit(0x03);

LCD_Enable();

delay_ms(5);

LCD_Enable();

delay_us(100);

LCD_Enable();

LCD_Send4Bit(0x02);



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LCD_Enable();

LCD_SendCommand( 0x28 ); // giao thuc 4 bit, hien thi 2 hang, ki tu 5x8

LCD_SendCommand( 0x0c);



// cho phep hien thi man hinh



LCD_SendCommand( 0x06 ); // tang ID, khong dich khung hinh

LCD_SendCommand( 0x01 ); // xoa toan bo khung hinh

}

void LCD_Gotoxy(unsigned char x, unsigned char y)

{

unsigned char address;

if(!y)

address = (0x80+x);

else

address = (0xC0+x);

delay_us(1000);

LCD_SendCommand(address);

delay_us(50);

}

// Ham Xoa Man Hinh LCD

void LCD_Clear()

{

LCD_SendCommand(0x01);

delay_ms(10);



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}

// Ham Gui 1 Ki Tu Len LCD

void LCD_PutChar ( unsigned char Data )

{

LCD_RS=1;

LCD_SendCommand( Data );

LCD_RS=0;

}

void LCD_Puts (unsigned char *s)

{

while (*s)

{

LCD_PutChar(*s);

s++;

}

}

void LCD_PutNumber(long Num)

{

int temp = Num;

int i = 0, c[5];



if (temp != 0)



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{

while(temp)

{

c[i++] = temp%10;

temp /= 10;

}

while(i) LCD_PutChar(c[--i] + '0');

}

else LCD_PutChar('0');

}



 Main.h

/********************** MSP430 Config **************************/

#define



MCLK_F



1



/***************** Describe Function ***************************/

void UART_Init()

{

P1SEL |= BIT1 + BIT2 ;



// Set P1.1 as RXD



P1SEL2 |= BIT1 + BIT2 ;



// Set P1.2 as TXD



//Config

UCA0CTL1 |= UCSSEL_2;

UCA0BR0 = 104;



// 9600



UCA0BR1 = 0;



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UCA0MCTL |= UCBRS0;

UCA0CTL1 &=~ UCSWRST;

IE2 |= UCA0RXIE;



// **Initialize USCI state machine**



// Enable USCI_A0 RX interrupt



__bis_SR_register(GIE);

}

/****************************************/

/****************************************/

void UART_Put_Char( unsigned char c)

{

while(!(IFG2 & UCA0TXIFG)); // Wait until buffer empty

UCA0TXBUF = c;



// Assign character



}

/****************************************/

void UART_Put_Int(unsigned char i)

{

while(!IFG2 & UCA0TXIFG)

UCA0TXBUF = i;

}

/****************************************/

void UART_Put_String(char* s)

{

while(*s != '\0')



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{

UART_Put_Char(*s);

s++;

}

}

/****************************************/

void UART_PutNumber(long Num)

{

long temp = Num;

int i = 0, c[10];



if (temp != 0)

{

while(temp)

{

c[i++] = temp%10;

temp /= 10;

}

while(i) UART_Put_Char(c[--i] + '0');

}

else UART_Put_Char('0');

}



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/***************************************************************/



 Main.c

//////////////////////////////////////////////////////

#include "msp430g2553.h"

#include "lcd_1602.c"

#include "main.h"

/////////////////////////////////////////////////////////////////////////////

// define functions

void init_GPIO(void);

void init_ADC(void);

void init_TIMER0(void);

unsigned int vol_value(void);



// define varible

union reg* P1_IFG = (union reg*)0x23;

#define P1IFG_0



P1_IFG->_bit.b0



//////////////////////////////////////////////////////////////////////////////

int ccr0 = 0;

int count= 0;

long t= 0;

long f = 0;

//////////////////////////////////////////////////////////////////////////////



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void main (void)

{

WDTCTL = WDTPW + WDTHOLD;



// Stop WDT



init_GPIO();

init_ADC();

init_TIMER0();

BCSCTL1 = CALBC1_1MHZ; // Set SMCLK to 1 MHz

DCOCTL = CALDCO_1MHZ;

__bis_SR_register(GIE); //Ngat toan cuc

// ADC10CTL0 |= ENC;



// enable ADC10



//LCD

LCD_Init();

delay_ms(10);

UART_Init();

unsigned int vol;



// khai bao bien dien ap



while(1)

{

LCD_Gotoxy(0,0);

LCD_Puts("Uhd XC:");

LCD_Gotoxy(0,1);

LCD_Puts("F=");

// /*



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