16V554 的测试代码

/* SC16C554 */
#define SC16C554_BASE           ( (unsigned char *) 0x50004000 )
#define SC16C554_PORTA_BASE     ( (unsigned char *) 0x50004000 )
#define SC16C554_PORTB_BASE     ( (unsigned char *) 0x50004100 )
#define SC16C554_PORTC_BASE     ( (unsigned char *) 0x50004200 )
#define SC16C554_PORTD_BASE     ( (unsigned char *) 0x50004300 )
char *SC16C554_RegPtrA = (char *)SC16C554_PORTA_BASE;
char *SC16C554_RegPtrB = (char *)SC16C554_PORTB_BASE;
char *SC16C554_RegPtrC = (char *)SC16C554_PORTC_BASE;
char *SC16C554_RegPtrD = (char *)SC16C554_PORTD_BASE;

extern void DelayMs(unsigned char Count);
/************************************************************************/
#define Port_RHR                0
#define Port_THR                0

#define Port_IER                1
#define Port_ISR                2
#define Port_FCR                2
#define Port_LCR                3
#define Port_MCR                4
#define Port_LSR                5
#define Port_MSR                6
#define Port_SR             7

#define Port_DLL                0
#define Port_DLM                1
/************************************************************************/
#define BAUD_2400_DLL               0xC0
#define BAUD_2400_DLM               0x0

#define BAUD_4800_DLL               0x60
#define BAUD_4800_DLM               0x0

#define BAUD_9600_DLL               0x30
#define BAUD_9600_DLM               0x0

#define BAUD_19200_DLL              0x18
#define BAUD_19200_DLM              0x0

#define BAUD_38400_DLL              0x0C
#define BAUD_38400_DLM              0x0

#define BAUD_57600_DLL              0x08
#define BAUD_57600_DLM              0x0

#define BAUD_76800_DLL              0x06
#define BAUD_76800_DLM              0x0

#define BAUD_115200_DLL             0x04
#define BAUD_115200_DLM             0x0

#define BAUD_153600_DLL             0x03
#define BAUD_153600_DLM             0x0

#define BAUD_230400_DLL             0x02
#define BAUD_230400_DLM             0x0

#define BAUD_460800_DLL             0x01
#define BAUD_460800_DLM             0x0
/************************************************************************/
#define PORTA       0
#define PORTB       1
#define PORTC       2
#define PORTD       3
/************************************************************************/
void SC16C554_init(void)
{

    *(SC16C554_RegPtrA + Port_LCR) = 0x80;
    *(SC16C554_RegPtrA + Port_DLL) = BAUD_115200_DLL;
    *(SC16C554_RegPtrA + Port_DLM) = BAUD_115200_DLM;
    *(SC16C554_RegPtrA + Port_LCR) = 0x03;   // N,8,1
    *(SC16C554_RegPtrA + Port_FCR) = 0x00;
    *(SC16C554_RegPtrA + Port_MCR) = 0x08;
    *(SC16C554_RegPtrA + Port_IER) = 0x05;


    *(SC16C554_RegPtrB + Port_LCR) = 0x80;
    *(SC16C554_RegPtrB + Port_DLL) = BAUD_115200_DLL;
    *(SC16C554_RegPtrB + Port_DLM) = BAUD_115200_DLM;
    *(SC16C554_RegPtrB + Port_LCR) = 0x03;   // N,8,1
    *(SC16C554_RegPtrB + Port_FCR) = 0x00;
    *(SC16C554_RegPtrB + Port_MCR) = 0x08;
    *(SC16C554_RegPtrB + Port_IER) = 0x05;

    *(SC16C554_RegPtrC + Port_LCR) = 0x80;
    *(SC16C554_RegPtrC + Port_DLL) = BAUD_115200_DLL;
    *(SC16C554_RegPtrC + Port_DLM) = BAUD_115200_DLM;
    *(SC16C554_RegPtrC + Port_LCR) = 0x03;   // N,8,1
    *(SC16C554_RegPtrC + Port_FCR) = 0x00;
    *(SC16C554_RegPtrC + Port_MCR) = 0x08;
    *(SC16C554_RegPtrC + Port_IER) = 0x05;

    *(SC16C554_RegPtrD + Port_LCR) = 0x80;
    *(SC16C554_RegPtrD + Port_DLL) = BAUD_115200_DLL;
    *(SC16C554_RegPtrD + Port_DLM) = BAUD_115200_DLM;
    *(SC16C554_RegPtrD + Port_LCR) = 0x03;   // N,8,1
    *(SC16C554_RegPtrD + Port_FCR) = 0x00;
    *(SC16C554_RegPtrD + Port_MCR) = 0x08;
    *(SC16C554_RegPtrD + Port_IER) = 0x05;

}
/************************************************************************/
void Reset16C554(void)
{
    AT91F_PIO_SetOutput(AT91C_BASE_PIOD, AT91C_PIO_PD8);
    DelayMs(50);
    AT91F_PIO_ClearOutput(AT91C_BASE_PIOD, AT91C_PIO_PD8);
    DelayMs(50);
}
/************************************************************************/
void SC16C554_Send(unsigned char Port,unsigned char *buf,unsigned short len)
{
    unsigned short i;
    if(Port == PORTA)
    {
        for(i=0;i<len;i++)
        {
            *(SC16C554_RegPtrA + Port_THR) = buf[i];
        }
    }
    if(Port == PORTB)
    {
        for(i=0;i<len;i++)
        {
            *(SC16C554_RegPtrB + Port_THR) = buf[i];
        }
    }
    if(Port == PORTC)
    {
        for(i=0;i<len;i++)
        {
            *(SC16C554_RegPtrC + Port_THR) = buf[i];
        }
    }
    if(Port == PORTD)
    {
        for(i=0;i<len;i++)
        {
            *(SC16C554_RegPtrD + Port_THR) = buf[i];
        }
    }
}
/************************************************************************/
unsigned char SC16C554_Receive(unsigned char Port)
{
    unsigned char TempChar;
    unsigned char IntStatus;

    if(Port == PORTA)
    {
        TempChar = *(SC16C554_RegPtrA + Port_RHR);
        IntStatus = *(SC16C554_RegPtrA + Port_ISR);
    }

    if(Port == PORTB)
    {
        TempChar = *(SC16C554_RegPtrB + Port_RHR);
        IntStatus = *(SC16C554_RegPtrB + Port_ISR);
    }

    if(Port == PORTC)
    {
        TempChar = *(SC16C554_RegPtrC + Port_RHR);
        IntStatus = *(SC16C554_RegPtrC + Port_ISR);
    }

    if(Port == PORTD)
    {
        TempChar = *(SC16C554_RegPtrD + Port_RHR);
        IntStatus = *(SC16C554_RegPtrD + Port_ISR);
    }
    return TempChar;
}