N76E003 接受DMX512协议信号，遇到问题

只看该作者 · 2017-6-30 10:02

本帖最后由 zsp06312222 于 2017-6-30 10:04 编辑

串口初始化：
void InitialUART0_Timer1(UINT32 u32Baudrate) //T1M = 1, SMOD = 1
{
      P05_PushPull_Mode; //P05
            P06_Quasi_Mode;             //Setting UART pin as Quasi mode for transmit
            P07_Quasi_Mode;             //Setting UART pin as Quasi mode for transmit
      TIMER1_MODE2_ENABLE;
SCON = 0x70;          //UART0 Mode1,REN=1,TI=1  //SCON = 0xD0; //0x50
TMOD |= 0x20;          //Timer1 Mode2
set_SMOD;             //UART0 Double Rate Enable  //
set_T1M;
clr_BRCK;             //Serial port 0 baud rate clock source = Timer1  //

TH1 = 256 - (1000000/u32Baudrate+1);             /*16 MHz */

      clr_ET1;       //¹Ø±ÕTimer1ÖÐ¶Ï
      set_TR1;       //Ê¹ÄÜ¶¨Ê±Æ÷1  TCON

      set_RB8;                                     //This bit is for setting the stop bit 2 high/low status, //ÉèÖÃ½ÓÊÜµÄµÚ¾ÅÎ»Êý¾Ý =1; //SCON

set_ES;          //enable UART interrupt    //
set_EA;          //enable global interrupt //
}
串口中断处理函数：
void SerialPort0_ISR(void) interrupt 4 //4
{
      UINT8 rece_data;
if(RI)    //´®¿Ú0½ÓÊÜÖÐ¶Ï±êÖ¾
{                                     /* if reception occur */
   clr_RI;                            /* clear reception flag for next reception */
                        if(RB8==0)  //RB8
                              {
//                                     if(rece_data==0) //
//                                     {
                                             rec_ok = 1;
                                             dmx_channel = 0;
                                             Adr = Address - 1;  //Address = dmx;
//                                     }
                                    Point = 100; //3ms*250
                              }
                              else
                              {
                                    if(rec_ok)  //bit rec_ok;
                                    {
                                             if(Adr == 0) //uint Adr,Address;
                                             {
                                                      recbuf[dmx_channel] = SBUF;  //½ÓÊÜ
                                                      dmx_channel ++;
                                                      if(dmx_channel > RECCHANNEL) //RECCHANNEL = 2;
                                                      {
                                                            rec_ok = 0;
                                                            dmx_recok = 1;  //
                                                      }
                                             }
                                             else  Adr--;
                                    }
                              }


}

}