以前用 51 和 STM32 的单片机做过, 但是这个刚开始玩, 库没介绍不知咋弄.
DMX512_RDM 协议. pdf
6a7c0e61d5bf5a396c1e795f51ea4571. pdf
stm32 实现 DMX512 协议发送与接收. PDF

这个是 STM32 的
void USART1_IRQHandler (void)
{

uint8_t SBUF; 
if (__HAL_UART_GET_FLAG (&huart1, UART_FLAG_FE)  == SET) 
{             
    SBUF = huart1. Instance- DR; 
    __HAL_UART_CLEAR_FLAG (&huart1, UART_FLAG_FE) ; 
    __HAL_UART_CLEAR_FLAG (&huart1, UART_FLAG_PE) ;         
    if (SBUF == 0) 
    {
        DMX_SIGN = 1; 
        CHK_SIGN = 0; 
        AddrCont = 0;  
        DmxRec   = 0;                         
    }
    else 
    {
        DMX_SIGN = 0; 
        CHK_SIGN = 0;                    
    }
}     

else if (__HAL_UART_GET_FLAG (&huart1, UART_FLAG_RXNE) == SET)
{

    SBUF = huart1. Instance- DR;    
    __HAL_UART_CLEAR_FLAG (&huart1, UART_IT_RXNE) ; 
    __HAL_UART_CLEAR_FLAG (&huart1, UART_FLAG_RXNE) ;    
    if (DMX_SIGN == 1) 
    {
        switch (SBUF)  
        {
            case 0: 
                CHK_SIGN = 1; 
                Slave    = 0; 
                DmxSign  = 200; 
                Addrbuf  = DmxAddr; 
                DmxRec   = 0; 
                DMX_SIGN = 0; 
                AddrCont = 0;                                             
                break; 
        
            case 1:             
                CHK_SIGN = 1; 
                Slave    = 1; 
                DmxSign  = 200; 
                DmxRec   = 0; 
                Addrbuf  = 1;  
                DMX_SIGN = 0; 
                AddrCont = 0;                                             
                break;                         
        }
    }
    else 
    {
        if (CHK_SIGN == 1) 
        {                        
            AddrCont++;                                 
            if (AddrCont ==  (Addrbuf+DmxRec) ) 
            {
                dmx[DmxRec] = SBUF; 
                if (++DmxRec  =64 ) {DmxRec=0; CHK_SIGN = 0; }
            }                        
        }
    }        

}
HAL_UART_IRQHandler (&huart1) ;
}
这个是 51 的
void IRQ_Uart0 (void) interrupt 4 using 3
{

RI = 0; 
if (RB8==0) 
{
    Dmx_Startcode = 0;         
    DmxCont=0x0000;     
    Dmx_Space = 1;             
    return;                 
}         
else if (RB8 == 1) 
{
    if (Dmx_Space == 1) 
    {              
        if (SBUF == 0) 
        {
            Dmx_Startcode = 1; 
            Dmx_Space = 0;                 
            Dmxsig = 200; 
            DmxCont=0x0000; 
        }
        else Dmx_Startcode = 0;                 
    }        
    else if (Dmx_Startcode == 1) 
    {        
            DmxCont++;  
            Dmxdat[DmxCont] = SBUF;                                     
            if (DmxCont =512) DmxCont=0; 
    }                
}                  

}
这个是 51 发送的:
void DmxOut (void)
{

uint8_t i; 
P31 = 0; Delay88us () ; 
P31 = 1; Delay8us () ; 
TB8 = 1; 
SBUF = 0x00;  while (TI==0) ; TI=0; 
for (i=0; i 16; i++) 
{
    if (Black==0) SBUF=out[i]; 
    else SBUF = 0; 
    while (TI==0) ; TI=0; 
}    

}

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