vidu4-2.c

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/*******************************************************************************
;	Vidu4-2.c la chuong trinh viet bang C30 de chay tren mot dsPIC			   *
;	Chuong trinh thuc hien viec sau: Doc ky tu tu cong RS232, sau do gui tra   *
;	ky tu da duoc sua doi (cong 1 vao) ve thong qua cong RS232				   *
;*******************************************************************************

;	Tac gia				: Nguyen Quang Nam									   *

;	Don vi				: PIC Viet Nam										   *

;	Ten tap tin			: Vidu4-2.c											   *

;	Ngay				: 25/08/2006										   *

;	Phien ban			: 0.01												   *

;	Nhung tap tin can thiet khac: p30F4012.gld, p30f4012.h					   *

;	Cong cu duoc dung:	MPLAB 7.31											   *
;						C30 2.02 SE											   *
;						ASM30 2.14											   *
;						LNK30 2.14											   *
------------------------------------------------------------------------------*/
#include "p30f4012.h"

	_FOSC(CSW_FSCM_OFF & FRC_PLL4);		//Clock = 32 MHz
	_FWDT(WDT_OFF);
	_FBORPOR(MCLR_EN & PBOR_OFF & PWMxL_ACT_HI & PWMxH_ACT_HI);
	_FGS(CODE_PROT_OFF);

//Cac prototype cho cac chuong trinh con
void Init_UART1_Module(void);

//Cac bien toan cuc
unsigned short temp;

//------------------------------------------------------------------------------
//Chuong trinh chinh
int main(void) {
	Init_UART1_Module();	//Khoi tao module UART1
	while (1) {
		if (U1STAbits.URXDA) {		//Cho den khi nhan duoc mot ky tu
			temp = U1RXREG;			//Doc ky tu da nhan duoc vao temp
			U1TXREG = temp + 1;		//Gui tra ky tu da duoc sua doi (cong 1 vao)
		};
	};
}

//Chuong trinh con khoi tao module UART1
void Init_UART1_Module(void) {
	U1MODE = 0x8000;		//Main I/O, 8-bit, no parity, 1 stop bit
	U1STA = 0x0400;			//bit10=UTXEN
	U1BRG = (((8000000/38400)/16)-1);	//38400 bps @ Fcy = 8 MHz
}