[han_nang_008]

bác nào giúp em với, em viết chương trình gửi kí tự lên PC, và từ PC gửi xuống 30F4011, nhưng đều ra các kí tự là, %!@&....

code nhận dữ liệu từ PC

#include "p30f4011.h"
#include "uart.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);

//Chuong trinh cau hinh UART
//------------------------------------------------------------------------------
void Uart_Setup(void)
{
	unsigned int baudvalue,U2MODEvalue,U2STAvalue;
	CloseUART2();
	ConfigIntUART2(	UART_RX_INT_EN & UART_RX_INT_PR6 &
					UART_TX_INT_DIS & UART_TX_INT_PR1 ) ;
				
	baudvalue = 	(((7370000/9600)/16)-1);					//baud=9600 bps ==> nhaapj vaof baudvalue = (((7370000/9600)/16)-1) voi  Fcy = 7.37 Mhz,
	
	U2MODEvalue =	UART_EN & UART_IDLE_STOP & UART_RX_TX &
					UART_DIS_WAKE & UART_DIS_LOOPBACK &
					UART_DIS_ABAUD & UART_NO_PAR_8BIT &
					UART_1STOPBIT;
				
	U2STAvalue = 	UART_INT_TX &
					UART_TX_PIN_NORMAL &
					UART_TX_ENABLE &
					UART_INT_RX_CHAR &
					UART_ADR_DETECT_DIS &
					UART_RX_OVERRUN_CLEAR;
	OpenUART2(U2MODEvalue, U2STAvalue, baudvalue);
}

//========================== UART1 Interrupt Sub-Routine =====================//
void __attribute__((__interrupt__)) _U2RXInterrupt(void)
{
	_U1RXIF = 0;				//Xoa co ngat 
	lcd_putstr(ReadUART2());	//xuat chuoi ra LCD
	
}



//Chuong trinh chinh
//------------------------------------------------------------------------------
void main() 
{	ADPCFG = 0xFFBF;		//Cac chan khac la digital, chan AN0/RB0 la analog
	_TRISE3 = 0;
	Uart_Setup();			
	Init_PORTS_LCD();			//Khoi tao cac cong I/O

	Init_LCD();					//Khoi tao LCD	
    lcd_putstr("TOC DO =");


	while (1) 
	{	
		_LATE3=1;
		Delay_ms(250);			//Vong lap chinh
		_LATE3=0;
		Delay_ms(250);
	}
}

code gủi dữ liệu lên PC

#include "p30f4011.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_TMR1(void);
void Init_UART2_Module(void);

//Bang hang so trong ROM

unsigned char Chuoi1[] = "Xin chao!";

//Cac bien toan cuc
unsigned char flag, idx;

//------------------------------------------------------------------------------
//Chuong trinh chinh
int main(void) {
	Init_TMR1();			//Khoi tao Timer 1
	Init_UART2_Module();	//Khoi tao module UART1
	flag = 0;				//Xoa co bao het thoi gian cho
	while (1) {
		if (flag) {			//Cho den khi het thoi gian cho
			idx = 0;
			while (Chuoi1[idx]) {	//Neu chua het chuoi thi
				U2TXREG = Chuoi1[idx++];	//Xuat tiep 1 ky tu
				while (!U2STAbits.TRMT);	//Cho den khi truyen xong ky tu
			};
			flag = 0;
		};
	};
}

//Chuong trinh con khoi tao module UART1
void Init_UART2_Module(void) {
	U2MODE = 0x8000;		//Main I/O, 8-bit, no parity, 1 stop bit
	U2STA = 0x0400;			//bit10=UTXEN
	U2BRG = (((7370000/9600)/16)-1);	//38400 bps @ Fcy = 8 MHz
}

//Chuong trinh con khoi tao Timer 1, tran sau moi 1 giay o muc xung 8 Mips
void Init_TMR1(void) {
	TMR1 = 0;			//Xoa so dem trong TMR1
	PR1 = 0x7A12;		//Nguong tran la 1 giay tuong ung voi clock = 32 MHz
	_T1IF = 0;			//Xoa co ngat cua Timer 1
	T1CON = 0x8030;		//Dung fcy lam clock, prescale = 1:256
	_T1IE = 1;			//Cho phep ngat khi Timer 1 tran
}

//Chuong trinh xu ly ngat Timer 1
void _ISR _T1Interrupt(void) {
	_T1IF = 0;			//Xoa co ngat
	flag = 1;			//Bat co cho phep xuat chuoi ky tu
}

code viết bằng VB chung cho cả gửi và nhận

Private Sub Form_Load()
    
    
    With MSComm1
        .Settings = "9600,N,8,1"
        .CommPort = 1
        .RThreshold = 1
        .SThreshold = 0
        .InputMode = comInputModeText
        .InputLen = 0
        .Handshaking = comNone
        .InBufferSize = 1024
        .OutBufferSize = 1024
        .PortOpen = True
    End With
End Sub


Private Sub Form_Unload(Cancel As Integer)
    ' Dong cong
    MSComm1.PortOpen = False
End Sub

Private Sub Command1_Click()
    MSComm1.Output = Text1.Text
End Sub
Private Sub MSComm1_OnComm()
If (MSComm1.CommEvent = comEvReceive) Then
Text2.Text = Text2.Text + MSComm1.Input
End If
End Sub