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Annotation of funnyos/dev/lcd/44780_dev.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * $Id$
        !             3:  */
        !             4: #include <sys/types.h>
        !             5: #include <sys/device.h>
        !             6: #include <sys/gpio.h>
        !             7: #include <dev/lcd/44780var.h>
        !             8: #include <dev/lcd/44780reg.h>
        !             9:
        !            10:
        !            11: /*
        !            12:  * Driver for Hitachi 44780-based LCD.
        !            13:  */
        !            14:
        !            15: int    h44780_attach(struct device *, uint32_t, uint8_t);
        !            16: void   h44780_write(struct h44780_dd *ddp, uint16_t data);
        !            17: void   h44780_strobe(struct h44780_dd *ddp);
        !            18: void   h44780_init(struct h44780_dd *ddp);
        !            19:
        !            20: struct driver h44780_dr = {
        !            21:        sizeof(struct h44780_dd),
        !            22:        h44780_attach,
        !            23:        NULL,
        !            24:        NULL
        !            25: };
        !            26:
        !            27:
        !            28: int
        !            29: h44780_attach(struct device *self, uint32_t loc, uint8_t flags)
        !            30: {
        !            31:        struct h44780_dd *ddp = self->dv_devdata;
        !            32:        ddp->h_bop = self->dv_parent->dv_aux;
        !            33:
        !            34:        printf("Hitachi 44780 LCD controller\n");
        !            35:
        !            36:        h44780_init(ddp);
        !            37:
        !            38:        return(0);
        !            39: }
        !            40:
        !            41:
        !            42: void
        !            43: h44780_write(struct h44780_dd *ddp, uint16_t data)
        !            44: {
        !            45:        printf("h44780_write: write 0x%x\n", data);
        !            46:        ddp->h_bop->write(ddp->h_bop->selfdd, data);
        !            47:
        !            48: }
        !            49:
        !            50:
        !            51: void
        !            52: h44780_strobe(struct h44780_dd *ddp)
        !            53: {
        !            54:        ddp->h_bop->strobe(ddp->h_bop->selfdd);
        !            55:
        !            56: }
        !            57:
        !            58:
        !            59: void
        !            60: h44780_init(struct h44780_dd *ddp)
        !            61: {
        !            62:        h44780_write(ddp, H44780_CMD_IFLEN | H44780_DL | H44780_N | H44780_F);
        !            63: //     h44780_strobe(ddp);
        !            64:        H44780_DELAY;
        !            65:        h44780_write(ddp, H44780_CMD_IFLEN | H44780_DL | H44780_N | H44780_F);
        !            66: //     h44780_strobe(ddp);
        !            67:        H44780_DELAY;
        !            68:        h44780_write(ddp, H44780_CMD_IFLEN | H44780_DL | H44780_N | H44780_F);
        !            69: //     h44780_strobe(ddp);
        !            70:        H44780_DELAY;
        !            71:        h44780_write(ddp, H44780_CMD_ENABLE | H44780_B | H44780_C | H44780_D);
        !            72: //     h44780_strobe(ddp);
        !            73:        H44780_DELAY;
        !            74:        h44780_write(ddp, H44780_CMD_CLS);
        !            75: //     h44780_strobe(ddp);
        !            76:        H44780_DELAY;
        !            77:        h44780_write(ddp, H44780_CMD_SETDIR | H44780_ID | H44780_S);
        !            78: //     h44780_strobe(ddp);
        !            79:        h44780_write(ddp, 0);
        !            80: //     h44780_strobe(ddp);
        !            81: H44780_DELAY;
        !            82:        h44780_write(ddp, 0x38);
        !            83: //     h44780_strobe(ddp);
        !            84: H44780_DELAY;
        !            85:        h44780_write(ddp, 0);
        !            86: //     h44780_strobe(ddp);
        !            87: H44780_DELAY;
        !            88:        h44780_write(ddp, 0x0f);
        !            89: //     h44780_strobe(ddp);
        !            90: }
        !            91:
        !            92: