7X256 UART0中断的问题

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7X256 UART0中断的问题 [复制链接]

请帮忙看看，我的uart0串口中断程序哪里错在哪里？按理说只要收到一个字节就应该进中断，可调试过程中只能进一次中断而且收到的数据不对，请大家指点。

  void US0_handler (void)  
{
  unsigned short status,data;
  status = AT91C_BASE_US0->US_CSR;

    // Receive buffer is full
    if ((status & AT91C_US_RXRDY) == AT91C_US_RXRDY)
 {
   data = AT91C_BASE_US0->US_RHR;
 }
}

void AIC_ConfigureIT(
    unsigned int source,
    unsigned int mode,
    void (*handler)(void))
{
    // Disable the interrupt first
    AT91C_BASE_AIC->AIC_IDCR = 1 << source;

    // Configure mode and handler
    AT91C_BASE_AIC->AIC_SMR[source] = mode;
    AT91C_BASE_AIC->AIC_SVR[source] = (unsigned int) handler;

    // Clear interrupt
    AT91C_BASE_AIC->AIC_ICCR = 1 << source;
}

//------------------------------------------------------------------------------
/// Enables interrupts coming from the given (unique) source (AT91C_ID_xxx).
/// \param source  Interrupt source to enable.
//------------------------------------------------------------------------------
void AIC_EnableIT(unsigned int source)
{
    AT91C_BASE_AIC->AIC_IECR = 1 << source;
}

void init_uart0(unsigned short Baudrate)
{
 
 AT91F_PMC_EnablePeriphClock (AT91C_BASE_PMC, 1 << AT91C_ID_PIOA);
    AT91F_PMC_EnablePeriphClock (AT91C_BASE_PMC, 1 << AT91C_ID_US0);
 AT91F_PMC_EnablePeriphClock (AT91C_BASE_PMC, 1 << AT91C_ID_US0);
 AT91F_US0_CfgPIO(); //配置串口端口

 AT91F_US_Configure (
  AT91C_BASE_US0,
  MCK,                                  // Master Clock
  AT91C_US_USMODE_NORMAL| AT91C_US_CLKS_CLOCK| AT91C_US_CHRL_8_BITS| AT91C_US_PAR_NONE| AT91C_US_NBSTOP_1_BIT
                        | AT91C_US_CHMODE_NORMAL , // mode Register to be programmed
  Baudrate ,                              // baudrate to be programmed
  0);    
  // Configure the RXBUFF interrupt
    AT91F_AIC_ConfigureIt(AT91C_BASE_AIC,AT91C_ID_US0,7\
      ,AT91C_AIC_SRCTYPE_POSITIVE_EDGE,(void(*)())US0_handler ); 
    AIC_EnableIT(AT91C_ID_US0);
 // Enable Transmitter
 AT91F_US_EnableTx(AT91C_BASE_US0);
 AT91F_US_EnableRx(AT91C_BASE_US0);
 
 
 AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_US0);
       
       AT91C_BASE_US0->US_IER = AT91C_US_RXRDY;
}