sibo-playground/code/inventory/scan.c

/*
 * scan.c - Phase 1 barcode diagnostic for the Workabout MX integral laser.
 *
 * The EAN/UPC decoder LDD (BAREAN.LDD) is loaded, then the decoder device is
 * opened. The exact device-name form and open mode are not documented in the
 * available manuals (they live in the I/O Devices Reference), so this build
 * tries several candidates in one run and reports which one opens - most
 * likely "BAR:D" (the decoder over port D, like TTY:D), since bare "BAR:"
 * returns E_FILE_NAME (-38). Once open, it dumps every byte of each read so
 * the decoded UPC format can be seen.
 *
 * Blocking I/O; exit via the System screen.
 */
#include <plib.h>
#include "bcode.h"

#define NCAND 5

GLDEF_C INT main(VOID)
{
    VOID *chan;
    UBYTE buf[64];
    INT   loadErr, r, n, i, opened;
    UINT  k;

    static TEXT *names[NCAND] = { "BAR:D", "BAR:D", "BAR:",  "BAR:E", "BAR:A" };
    static UINT  modes[NCAND] = { (UINT)-1, 0,      0,       (UINT)-1, (UINT)-1 };

    loadErr = bcodeLoad();
    p_printf("load %s.LDD: %d\n\n", BCODE_LDD, loadErr);

    opened = 0;
    for (k = 0; k < NCAND; k++) {
        r = p_open(&chan, names[k], modes[k]);
        p_printf("open \"%s\" mode %u: %d\n", names[k], modes[k], r);
        if (r >= 0) {
            opened = 1;
            break;
        }
    }

    if (opened == 0) {
        p_printf("\nNothing opened. Press a key to exit.\n");
        p_getch();
        return 1;
    }

    p_printf("\nOpened \"%s\". Scan a barcode. System screen to exit.\n\n",
             names[k]);

    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");
    }
}