sibo-playground/code/inventory/scan.c

/*
 * scan.c - Phase 1 barcode diagnostic for the Workabout MX integral laser.
 *
 * Loads the EAN/UPC decoder LDD (BAREAN.LDD), opens the decoder device (BAR:)
 * and dumps every byte of each read: the decimal value of each byte plus a
 * printable rendering. This shows exactly what the decoder delivers for a UPC
 * (length, any prefix/type byte, terminator) so the reader and Phase 2 key
 * format can be built on fact rather than assumption.
 *
 * Blocking reads; exit via the System screen.
 */
#include <plib.h>
#include "bcode.h"

GLDEF_C INT main(VOID)
{
    VOID *chan;
    UBYTE buf[64];
    INT   err, n, i;

    err = bcodeLoad();
    /* 0 = loaded now; E_FILE_EXIST = already loaded. Anything else is a problem
       (e.g. E_FILE_NXIST = BAREAN.LDD not found on the device). */
    p_printf("load %s.LDD: %d\n", BCODE_LDD, err);

    if ((err = bcodeOpen(&chan)) < 0) {
        p_printf("open %s failed: %d\n", BCODE_DEV, err);
        return 1;
    }
    p_printf("%s open. Scan a barcode.\n\n", BCODE_DEV);

    for (;;) {
        n = p_read(chan, buf, sizeof(buf));
        if (n < 0) {
            p_printf("read err %d\n", n);
            continue;
        }
        if (n == 0)
            continue;
        p_printf("n=%d:", n);
        for (i = 0; i < n; i++)
            p_printf(" %d", buf[i]);
        p_printf("  \"");
        for (i = 0; i < n; i++)
            p_putch(buf[i] >= ' ' ? buf[i] : '.');
        p_printf("\"\n");
    }
}