urt_defs.h

Nucleus Kernel Demo Full source code

/*******************************************************************************/

/* These are the required 16 bit divisor values for the internal baud rate based on a 1.8MHz Clock */
#define DLM_50_Baud         0x09
#define DLL_50_Baud         0x00

#define DLM_110_Baud        0x04
#define DLL_110_Baud        0x17

#define DLM_150_Baud        0x03
#define DLL_150_Baud        0x00

#define DLM_300_Baud        0x01
#define DLL_300_Baud        0x5c

#define DLM_600_Baud        0x00
#define DLL_600_Baud        0xc0

#define DLM_1200_Baud       0x00
#define DLL_1200_Baud       0x60

#define DLM_2400_Baud       0x00
#define DLL_2400_Baud       0x30

#define DLM_4800_Baud       0x00
#define DLL_4800_Baud       0x18

#define DLM_7200_Baud       0x00
#define DLL_7200_Baud       0x10

#define DLM_9600_Baud       0x00
#define DLL_9600_Baud       0x0c

#define DLM_19200_Baud      0x00
#define DLL_19200_Baud      0x06

#define DLM_38400_Baud      0x00
#define DLL_38400_Baud      0x03

#define DLM_56000_Baud      0x00
#define DLL_56000_Baud      0x02

#define DLM_115200_Baud     0x00
#define DLL_115200_Baud     0x01


/* Defines for use by applications */
#define UART_A_RXINT            0x0100
#define UART_B_RXINT            0x0200

#define UART_A_VECTOR          17 
#define UART_B_VECTOR          18 


#define ICBASE          (0x0A000000)    /* Interrupt Controller Base */

#define IRQStatus       ((volatile int *)ICBASE)
#define IRQRawStatus    ((volatile int *)(ICBASE + 0x04))
#define IRQEnable       ((volatile int *)(ICBASE + 0x08))
#define IRQEnableSet    ((volatile int *)(ICBASE + 0x08))
#define IRQEnableClear  ((volatile int *)(ICBASE + 0x0c))
#define IRQSoft         ((volatile int *)(ICBASE + 0x10))



#define PARITY_ENABLE	LCR_Parity_Enable   
#define PARITY_NONE	0x00
// #define PARITY_NONE	~(LCR_Parity_Enable)   
#define PARITY_EVEN	LCR_Parity_Even     
#define PARITY_ODD	0x00
//#define PARITY_ODD	~(LCR_Parity_Even)
#define PARITY_SET	LCR_Parity_Set      

#define BREAK_SET	LCR_Break_Set       
#define NO_BREAK	0x00
//#define NO_BREAK	~(LCR_Break_Set)       


#define DIV_LATCH_ENABLE	LCR_Divisor_Latch   

#define WORD_LENGTH_5	LCR_5_Bit_Word
#define WORD_LENGTH_6	LCR_6_Bit_Word
#define WORD_LENGTH_7	LCR_7_Bit_Word
#define WORD_LENGTH_8	LCR_8_Bit_Word

#define STOP_BITS_1	LCR_Stop_Bit_1	    
#define STOP_BITS_1p5	LCR_Stop_Bit_1p5    
#define STOP_BITS_2	LCR_Stop_Bit_2	    


#define RX_CHARRDY             LSR_Rx_Data_Ready
#define RX_ERR                 LSR_Fifo_Error
#define RX_OVRRUN              LSR_Overrun_Error
#define RX_FRMERR              LSR_Framing_Error
#define RX_PRERR               LSR_Parity_Error


/* UART error codes */

#define UART_INVALID_PARITY     -1
#define UART_INVALID_DATA_BITS  -2
#define UART_INVALID_STOP_BITS  -3
#define UART_INVALID_BAUD       -4
#define UART_INVALID_COM_PORT   -5

typedef struct UART_INIT_STRUCT
{
    unsigned    com_port;
    unsigned    word_length;
    unsigned    stop_bits;
    unsigned    parity;
    unsigned    set_break;
    unsigned    baud_rate;

} UART_INIT;

#define     BUFFER_SIZE        100
#define     UART_BUFFER_FULL    -1
#define     UART_BUFFER_DATA    -2
#define     UART_BUFFER_EMPTY   -3

typedef struct BUFFER_STRUCT
{
    char    *head;
    char    *tail;
    char    *read;
    char    *write;
    INT     status;
    char    buffer[BUFFER_SIZE];
} BUFFER;


// ----- Begin PID code


#define UART_A                  0
#define UART_B                  1
#define COM1                   UART_A
#define COM2                   UART_B
#define UART_A_BASE		0x0D800000
#define UART_B_BASE		0x0D800020

/*  Interrupt bit masks */

#define RxReadyInt      0x0001
#define TxReadyInt      0x0010
#define RxLineInt       0x0100
#define ModemInt        0x1000

/* Line Status Register bits */

#define LSRRxData       0x00000001
#define LSROverrun      0x00000010
#define LSRParity       0x00000100
#define LSRFraming      0x00001000
#define LSRBreak        0x00010000
#define LSRTxHoldEmpty  0x00100000
#define LSRTxEmpty      0x01000000
#define LSRFIFOError    0x10000000

/*  Clock Divisors for various Baud rates (assuming that
  the PID is using a 1.843 MHz clock for the UART) */

#define Baud1200        0x0060
#define Baud2400        0x0030
#define Baud4800        0x0018
#define Baud9600        0x000c
#define Baud19200       0x0006
#define Baud38400       0x0003
#define Baud56000       0x0002  /* 2.77% error */
#define Baud57600       0x0002  /* 0% error */
#define Baud115200      0x0001

/* Serial Port A */

#define SerA_RHR ((volatile int *)(NISA_SER_A + 0x00))  /* Rx holding data */
#define SerA_THR ((volatile int *)(NISA_SER_A + 0x00))  /* Tx holding data */
#define SerA_IER ((volatile int *)(NISA_SER_A + 0x04))  /* Interrupt enable */
#define SerA_FCR ((volatile int *)(NISA_SER_A + 0x08))  /* Fifo control */
#define SerA_ISR ((volatile int *)(NISA_SER_A + 0x08))  /* Interrupt status */
#define SerA_LCR ((volatile int *)(NISA_SER_A + 0x0C))  /* Line control */
#define SerA_MCR ((volatile int *)(NISA_SER_A + 0x10))  /* Modem control */
#define SerA_LSR ((volatile int *)(NISA_SER_A + 0x14))  /* Line status */
#define SerA_MSR ((volatile int *)(NISA_SER_A + 0x18))  /* Modem status */
#define SerA_SPR ((volatile int *)(NISA_SER_A + 0x1C))  /* Scratchpad */
#define SerA_DLL ((volatile int *)(NISA_SER_A + 0x00))  /* LSB divisor latch */
#define SerA_DLM ((volatile int *)(NISA_SER_A + 0x04))  /* MSB divisor latch */

/* Serial Port B */

#define SerB_RHR ((volatile int *)(NISA_SER_B + 0x00))  /* Rx holding data */
#define SerB_THR ((volatile int *)(NISA_SER_B + 0x00))  /* Tx holding data */
#define SerB_IER ((volatile int *)(NISA_SER_B + 0x04))  /* Interrupt enable */
#define SerB_FCR ((volatile int *)(NISA_SER_B + 0x08))  /* Fifo control */
#define SerB_ISR ((volatile int *)(NISA_SER_B + 0x08))  /* Interrupt status */
#define SerB_LCR ((volatile int *)(NISA_SER_B + 0x0C))  /* Line control */
#define SerB_MCR ((volatile int *)(NISA_SER_B + 0x10))  /* Modem control */
#define SerB_LSR ((volatile int *)(NISA_SER_B + 0x14))  /* Line status */
#define SerB_MSR ((volatile int *)(NISA_SER_B + 0x18))  /* Modem status */
#define SerB_SPR ((volatile int *)(NISA_SER_B + 0x1C))  /* Scratchpad */
#define SerB_DLL ((volatile int *)(NISA_SER_B + 0x00))  /* LSB divisor latch */
#define SerB_DLM ((volatile int *)(NISA_SER_B + 0x04))  /* MSB divisor latch */

/* Macros describing the NISA Bus */

#define NISA_BASE       0x0C000000              /* NISA Base address */

#define NISA_IO_BASE    (NISA_BASE)
#define NISA_PCMCIA     (NISA_IO_BASE + 0x7C0) /* PCMCIA control registers */
#define NISA_SER_A      (NISA_IO_BASE + 0x01800000) /* Serial port A */
#define NISA_SER_B      (NISA_IO_BASE + 0x01800020) /* Serial port B */
#define NISA_PAR        (NISA_IO_BASE + 0x01800040) /* Parallel port */

#define NISA_PCMEM      0x0E000000              /* PCMCIA memory base */

#define NISA_TOP        0x10000000              /* Top of NISA Space */


#endif /* EOF for urt_defs.h */