Return to slu7201.h CVS log

Up to [XINU] / xinu / h

Annotation of xinu/h/slu7201.h, revision 1.1

1.1     ! root        1: /* slu7201.h--only used for ATT7300, since MECB has no such SLU */
        !             2: /* The NEC7201 is a dual UART, used for console on ATT7300 because of
        !             3:    its programmable baudrates as defined below */
        !             4: 
        !             5: /* console is channel A: #define SLUCSR1 (struct csr *)0xe50000  */
        !             6: /* channel B: #define SLUCSR2 (struct csr *)0xe50002 */
        !             7: 
        !             8: /* magic addrs to write to to select baud rate for console SLU1-- */
        !             9: #define SLUSELECT38400 ((char *)0x4b0001)
        !            10: #define SLUSELECT19200 ((char *)0x4b0002)
        !            11: #define SLUSELECT9600 ((char *)0x4b0004)
        !            12: #define SLUSELECT4800 ((char *)0x4b0008)
        !            13: #define SLUSELECT2400 ((char *)0x4b0010)
        !            14: #define SLUSELECT1200 ((char *)0x4b0020)
        !            15: 
        !            16: /* control/status regs--write reg # to cstat, then read or write stat/cmd */
        !            17: /* valid when current reg = 0, the base state we stay in most of the time-- */
        !            18: #define SLUREGMASK     0x7             /* bits for reg # for next access */
        !            19: #define SLURESET      (3<<3)            /* reg 0 cmd to reset chip */
        !            20: /* control reg defaults-- program reg2, then reg 4, then others */
        !            21: /* reread data sheet before trying to use channel B */
        !            22: #define SLUCREG1DEF   0              /* no ints */
        !            23: #define SLUTRANSIE    (1<<1)         /* trans int ena */
        !            24: #define SLURECVIE     (2<<3)         /* recv int on ea char recvd */
        !            25: #define SLUINTBITS    (0x3<<3|SLUTRANSIE) /* 2bits receiver, 1 bit xmit int */
        !            26: #define SLUCREG2DEF   0              /* non-DMA, nonvect ints, etc. */
        !            27: #define SLUCREG3DEF   (0xc1)         /* 8 bits on recv, recv ena, inactive cts*/
        !            28: #define SLUCREG4DEF   (0x44)          /* 16x clock,async,1stopbit,no par.*/
        !            29: #define SLUCREG5DEF    0x68          /* 8 bits,no brk,trans ena,rts lev,no crc*/
        !            30: #define SLUCREG5DTR    (1<<7)         /* 1 here makes DTR* low (asserted) */
        !            31: /* status reg 0 */
        !            32: #define        SLUTRANSREADY   (1<<2)          /* device ready bit             */
        !            33: #define SLURECVREADY   (1<<0)          /* receiver ready bit */
        !            34: #define SLUASCII7BITS   0177           /* mask for 7 bits of ASCII char,
        !            35:                                          to mask off parity bit */
        !            36: #define SLUCHMASK      0x7f             /* 7 ASCII bits */
        !            37: 
        !            38: struct csr     {
        !            39:        unsigned short cbuf;    /* write for transmit, read for input */
        !            40:        short dummy;            /* skip other reg in between */
        !            41:        unsigned short cstat;   /* read for status, write for control reg */
        !            42: };
        !            43: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.