skel_dev.c

[詳解]

/** @file
    @brief      デバイスドライバのスケルトン

    @date       日時を記述
    @authoer    作成者名を記述
*/

#include "device.h"
#include "interrupt.h"

static int skel_addr;

void skel_inthdr(unsigned int intnum, void *sp)
{
}

static int skel_register(char *param)
{
        skel_addr = 0;

        register_interrpt(VECTNUM, skel_inthdr);

        return 0;
}

static int skel_unregister(void)
{
        return 0;
}

static int skel_open(void)
{
        return 0;
}

static int skel_close(void)
{
        return 0;
}

static int skel_read(void *buf, unsigned int count)
{
        return count;
}

static int skel_getc(unsigned char *data)
{
        return 1;
}

static int skel_write(const void *buf, unsigned int count)
{
        return count;
}

static int skel_putc(unsigned char data)
{
        return 1;
}

static int skel_ioctl(unsigned int com, unsigned int arg, void *param)
{
        return 0;
}

static int skel_seek(int offset, int whence)
{
        switch(whence) {
        case SEEK_SET:
                skel_addr = offset;
                break;

        case SEEK_CUR:
                skel_addr += offset;
                break;

        case SEEK_END:
                break;

        default:
                return -1;
        }

        return skel_addr;
}

const device skel_device = {
        .name           = "skel",
        .explan         = "Explan device",
        .register_dev   = skel_register,
        .unregister_dev = skel_unregister,
        .open           = skel_open,
        .close          = skel_close,
        .read           = skel_read,
        .getc           = skel_getc,
        .write          = skel_write,
        .putc           = skel_putc,
        .ioctl          = skel_ioctl,
        .seek           = skel_seek,
};