uart.c

一个变频器的代码,用msp430就能实现.低成本,可靠性也不错.

 #include "def.h" 
void InitSerial(void)
   {
     UCTL1 &=~ SWRST;                   // reset SWRST bit
     UCTL1 = 0x10;                //uart,char,sp=1
     UBR01 = 0x43;                    //8353for 8M,9600bps  
     UBR11 = 0x03;  
     //UBR01 = 0x53;                    //8353for 8M,9600bps  
     //UBR11 = 0x00; 
     UMCTL1 = 0x0; 
     
    // UTCTL1 = 0x30;                     //smclk
     UTCTL1 = 0x10;                     //smclk
     
     URCTL1 = 0;                      //any char receive  
     ME2 |= URXE1+UTXE1;             // enable USART transmit
     IE2|=URXIE1;
     
   IFG2 &= ~(URXIFG1+UTXIFG1); 
    P3SEL |= (BIT6+BIT7);             // Pin P3.67 used by USART module
    P3DIR |= BIT6;             // Pin P3.6 is output
    P3DIR &= ~BIT7;             // Pin P3.7 is input
    }
    

 interrupt [UART1RX_VECTOR] void recivdata(void)      
{ 
  unsigned char tmpsbuf,tmpstat;
  tmpstat=URCTL1;
  tmpsbuf=RXBUF1;
  TXBUF1=tmpsbuf;
  }