PIC单片机UART自动波特率程序

只看该作者 · 2014-6-6 17:38

想做一个PIC18F87J60自动波特率的串口程序串口程序如下没有见到想要的效果，测试时先发送了55 过了几秒之后才发送的数据可是依旧不能收到值，求指点一下
RCSTA2bits.SPEN = 0;// disable uart commutation
TXSTA2bits.SYNC = 0; // asynchronous mode
TXSTA2bits.BRGH = 1; // high speed
   BAUDCON2bits.BRG16 = 1; // 16bits

RCSTA2bits.CREN = 1; // enable receive
TXSTA2bits.TXEN = 1; // tx enable

// EUSART2 rx int enable
IPR3bits.RC2IP = 1;          // high priority
PIE3bits.RC2IE = 1;          // enable

// EUSART2 tx int enable
IPR3bits.TX2IP = 1;          // high priority
PIE3bits.TX2IE = 0;          // disable

// Enable Interrupts
RCONbits.IPEN = 1; // Enable interrupt priorities
INTCONbits.GIEH = 1;
INTCONbits.GIEL = 1;

  //Define RX_IO TX_IO

   RCSTA2bits.SPEN = 0;// disable uart commutation

   BAUDCON2bies.WUE = 0;
   BAUDCON2bits.ABDEN =1;

//calculate baud rate
TRISGbits.TRISG2 = 1;
TRISGbits.TRISG1 = 0;
//enable uart
RCSTA2bits.SPEN = 1;//Enable uart commutation