dsPIC Tutorial 5-Module ADC và MCPWM

[silvadk2]

Đây là code của em, đo nhiệt độ đưa vào RB8 rồi hiển thị ra LCD, nhưng sao dòng 2 chỉ hiện ra là 0. Em không biết là sai chỗ nào, hic

#include	<p30f4011.h>
#include 	<string.h>
#include 	<stdio.h>

_FOSC(CSW_FSCM_OFF & HS);	
_FWDT(WDT_OFF);				
_FBORPOR(MCLR_EN & PBOR_ON & BORV_27);
_FGS(CODE_PROT_OFF);		

#define		LCD_EN		LATFbits.LATF2		//Tin hieu Enable cho LCD, chan RF2
#define		LCD_RS		LATFbits.LATF6		//Tin hieu Reset cho LCD, chan RF6
#define		LCD_RW		LATFbits.LATF3		//Tin hieu doc ghi cho LCD, chan RF3
#define 		RW_TRIS 	 TRISFbits.TRISF3
#define 		RS_TRIS 		TRISFbits.TRISF6
#define		E_TRIS 		TRISFbits.TRISF2
#define 		LCD_PORTB 	PORTB
#define		LCD_DATA	LATB				//Cac tin hieu Data cho LCD
#define		LCD_TRIS	TRISB				//Tristate cua cac tin hieu Data cho LCD

#define		LCD_CLEAR		0x01		//Xoa man hinh LCD
#define		LCD_HOME		0x02		//Tro ve dau dong
#define		LCD_NORMAL		0x06		//Che do nhap du lieu binh thuong
#define		LCD_NORMAL_S	0x07		//Che do nhap du lieu binh thuong, dich man hinh
#define		LCD_OFF 		0x08		//Tat man hinh
#define		LCD_ON	 		0x0C		//Bat man hinh
#define		LCD_ON_CRSR 	0x0E		//Bat man hinh va con tro
#define		LCD_ON_BLINK 	0x0F		//Bat man hinh va con tro (nhap nhay)
#define		LCD_8B2L		0x38		//Che do 2 dong, giao tiep 8 bit du lieu
#define		LCD_HOMEL1		0x80		//Ve dau dong 1
#define		LCD_HOMEL2		0xC0		//Ve dau dong 2

#define		ShortDelay()	{Nop() Nop() Nop() Nop() Nop() Nop() Nop() Nop() Nop()}
//***************************************************************************//
unsigned int ADCValue;


//***************************************************************************//
//
//	Function:		LCDdelayms
//	Description:	LCDdelayms for LCD		
//	Input:			Number of ms
//	Output:			None
//
//***************************************************************************//
void LCDdelayms(unsigned int ms)
{
	#define		FCY				2500*4
	unsigned int i=0;
	while(ms--){while(++i<FCY/7);	i=0;}
}
//*************************** END OF LCDDELAYMS ****************************//

void LCD_CMD(unsigned char CMD)
{

	LCD_RW=0;
	LCD_RS = 0;	
    LCD_DATA = CMD;						
	LCD_EN = 1;	ShortDelay();	LCD_EN = 0;
		
}
//************************* End of LCD_CMD *********************************//

void LCD_DAT(unsigned char DATA)
{
	LCD_RW=0;
	LCD_RS = 1;	
    LCD_DATA = DATA;						
	LCD_EN = 1;	ShortDelay();	LCD_EN = 0;	//Xung Enable
	
}
//****************************** END OF LCD_DATA ****************************//



void InitLCD(void)
{
	LCD_CMD(LCD_8B2L);			//Dat che do giao tiep 8-bit, man hinh 2 dong
	LCDdelayms(1);
	LCD_CMD(LCD_8B2L);			//Dat che do giao tiep 8-bit, man hinh 2 dong
	LCDdelayms(1);
	LCD_CMD(LCD_8B2L);			//Dat che do giao tiep 8-bit, man hinh 2 dong
	LCDdelayms(1);
	LCD_CMD(LCD_OFF);			//Tat man hinh
	LCDdelayms(1);
	LCD_CMD(LCD_CLEAR);			//Xoa man hinh
	LCDdelayms(1);
	LCD_CMD(LCD_ON);			//Bat man hinh
	LCDdelayms(1);
	LCD_CMD(LCD_NORMAL);		//Che do nhap lieu binh thuong
								//Cursor move Increment, Not to shift the display
	LCDdelayms(1);
	LCD_CMD(LCD_CLEAR);			//Xoa man hinh
	LCDdelayms(5);
}
//************************** END OF InitLCD *********************************//

void LCD_PutChar(unsigned char character)
{
		LCD_DAT(character);
	LCDdelayms(1);
}
//************************** END of LCD_PutChar *****************************//

void LCD_WriteString(const char *str)
{
//	LCDdelayms(1);
	char ps;
	ps = *str;		
	while(ps>0)		
	{
		str++;			
		if (ps==0) break;
		LCDdelayms(1);
		LCD_DAT(ps);		
    	ps = *str;		
	}	
}
//*********************** END OF LCD_Writestring ****************************//



void LCD_Gotoxy(char x, char y)
{
	char tg;
	LCDdelayms(5);
    switch (y)
	{
		case 1:tg = 0x80+x;
			break;
		case 2:tg = 0xC0+x;
			break;
    }
	LCD_CMD(tg);
}
//************************* END OF LCD_Gotoxy *******************************//

void LCD_Clear(void)
{
	LCD_CMD(LCD_CLEAR);
}

void SystemInit(void)
{
	//Init IO
	TRISB = TRISB & 0xFF00;		//RB0..RB7 Output.
	TRISBbits.TRISB8 = 1;
	TRISFbits.TRISF6 = 0;		
	TRISFbits.TRISF2 = 0;		
	TRISFbits.TRISF3 = 0;		
	LATB = 0xFF00;
	LATFbits.LATF6 = 0;		
	LATFbits.LATF2 = 0;
	LATFbits.LATF3 = 0;		
		//InitLCD
	InitLCD();
}
//******************************* End of SystemInit *************************//
void Init_ADC10(void) {
	ADPCFG = 0xFEFF;		//Cac chan khac la digital, chan AN8/RB8 la analog

	ADCON1 = 0x0040;		//Timer 3 cham dut lay mau va kich hoat
							//viec chuyen doi A/D
	ADCON2 = 0;
	ADCHS =  0x0008 ;				//Kenh 0 doc tin hieu giua AN8 va AVss
	ADCSSL = 0;				//Khong quet cac ngo vao
	ADCON3 = 0x0103;		//Dung 1 TAD cho lay mau, dung clock he thong,
	TMR3 = 0;				//Xoa thanh ghi dem cua Timer 3
	PR3 = 0x03E8;			//Nguong delay cho TMR3 la khoang 1 ms
	T2CON = 0x8010;			//Prescale = 1:8, bat cho TMR3 chay

	_ADIF = 0;				//Xoa co ngat ADC
	_ADIE = 1;				//Cho phep ngat ADC
	_ADON = 1;				//Bat module ADC
	_ASAM = 1;				//Khoi dong che do tu dong lay mau
}
void _ISR _ADCInterrupt(void)
{
	ADCValue = ADCBUF0 ;		
	_ADIF = 0;
}
int main(void)
{
	int ADCVoltage;
	char Nhietdo[40];
	ADPCFG = 0xFEFF; 
	SystemInit();
	Init_ADC10();
	LCD_Gotoxy(1,1);	
	LCD_WriteString("nhiet do la");	
	LCDdelayms(10);
	LCD_Gotoxy(3,2);
	ADCVoltage=ADCValue/2;
	sprintf(Nhietdo, "%d",ADCVoltage );
	LCD_WriteString(Nhietdo);
	
	while(1);		//Dung chuong trinh.
}
//********************************* End of Main *****************************//