//void InitUART1(void); // 申明UART1初始化程序
void Configure_UART (void)
{
asm volatile ( "MOV #OSCCON,w1
"
"MOV #0x46,w2
"
"MOV #0x57,w3
"
"MOV.b w2,[w1]
"
"MOV.b w3,[w1]
"
"BCLR OSCCON,#6");
// configure input funcitions
// assign u1rx to pin rp2
RPINR18bits.U1RXR = 2;
// assign u1tx to pin rp3
RPOR1bits.RP3R = 3;
asm volatile ( "MOV #OSCCON,w1
"
"MOV #0x46,w2
"
"MOV #0x57,w3
"
"MOV.b w2,[w1]
"
"MOV.b w3,[w1]
"
"BSET OSCCON, #6" );
AD1PCFG = 0XFFFF; // 模拟通道全部配置为I/O通道
TRISBbits.TRISB2 = INPUT; // UART - U1RX
TRISBbits.TRISB3 = OUTPUT; // UART - U1TX
}
void Uart_Init()
{
U1MODE=0x8800;
U1STA=0x8000;
U1BRG=51; //19200
IFS0bits.U1TXIF=0;
IFS0bits.U1RXIF=0;
IEC0bits.U1TXIE=1; //UART1 发送器中断允许位
IEC0bits.U1RXIE=1; //UART1 接收器中断允许位
IPC2bits.U1RXIP=2; //中断优先级高于定时器优先级
IPC3bits.U1TXIP=2;
}
void Timer1Init()
void delay()
{
unsigned int k=0;
while(k<10000)
k++;
}
/*********************************
//__attribute__((__interrupt__))_U1RXInterrupt()
//串口1接收中断服务子程序
**********************************/
void __attribute__((__interrupt__))_U1RXInterrupt()
{
IFS0bits.U1RXIF=0;
if(U1STAbits.OERR)
{
U1STAbits.OERR=0;
}
else
{
if(U1_receive_count<700)
{
U1_receive[U1_receive_count]=U1RXREG;
U1_receive_count++;
}
else
{
U1_receive_count=0;
}
}
}
/**********************************
//__attribute__((__interrupt__))_U1TXInterrupt()
//发送中断服务子程序
*********************************/
void __attribute__((__interrupt__))_U1TXInterrupt()
{
IFS0bits.U1TXIF=0;
while(U1_send_count<=6)//
{
delay();
U1TXREG =U1_receive[U1_send_count] ;// while(!U1STAbits.TRMT);
U1_send_count++;
}
if(U1_send_count>6)//send_count
{
U1STAbits.UTXEN=0;
U1_send_count=0;
return;
}
}
int main(void)
{
Configure_UART(); // 设置RP2,RP3为UART1通讯口 Uart_Init();
TRISAbits.TRISA0 = 0;
TRISBbits.TRISB12 = 0;
TRISBbits.TRISB13 = 0;
LATAbits.LATA0 = 1;
LATBbits.LATB12 = 1;
LATBbits.LATB13 = 1;
while(1)
{
if((U1_receive_count%2) ==0)
{
LATBbits.LATB13 = !LATBbits.LATB13 ; // LED D3
}
LATAbits.LATA0 = !LATAbits.LATA0 ; // LED D1
delay();
delay();
U1STAbits.UTXEN = 1;
delay();
}
}接收可以正常 但是发送引脚没有输出！ |
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