51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/*
|
|
* scan.c - Phase 1: WL2:D scanner, trigger + read loop (reverse-engineered).
|
|
*
|
|
* Confirmed from the previous build: opening WL2:D then issuing control ops 6
|
|
* and 7 triggers a scan (laser fires, green good-read LED). What was missing was
|
|
* the read: a bare p_iow(chan, P_FREAD, buf) passes no length. This uses p_read
|
|
* (which passes &len) to collect the decoded result, and re-triggers (ops 6/7)
|
|
* each iteration so successive scans work without relying on the scan key.
|
|
* Decoded output is CR/LF-terminated (default Symbol2 postamble).
|
|
*/
|
|
#include <plib.h>
|
|
|
|
#define WL2_TRIG1 6
|
|
#define WL2_TRIG2 7
|
|
|
|
GLDEF_C INT main(VOID)
|
|
{
|
|
VOID *chan;
|
|
UBYTE buf[256];
|
|
INT err, n, i;
|
|
|
|
err = p_open(&chan, "WL2:D", (UINT)-1);
|
|
p_printf("open WL2:D: %d\n", err);
|
|
if (err < 0) {
|
|
p_printf("Press a key to exit.\n");
|
|
p_getch();
|
|
return 1;
|
|
}
|
|
|
|
p_printf("Present a barcode under the laser. Reads:\n\n");
|
|
|
|
for (;;) {
|
|
p_iow(chan, WL2_TRIG1); /* trigger a scan */
|
|
p_iow(chan, WL2_TRIG2);
|
|
n = p_read(chan, buf, sizeof(buf)); /* collect decoded result (with len) */
|
|
if (n < 0) {
|
|
p_printf("read %d\n", n);
|
|
continue;
|
|
}
|
|
if (n == 0)
|
|
continue;
|
|
p_printf("n=%d:", n);
|
|
for (i = 0; i < n && i < 40; i++)
|
|
p_printf(" %d", buf[i]);
|
|
p_printf(" \"");
|
|
for (i = 0; i < n && i < 40; i++)
|
|
p_putch(buf[i] >= ' ' ? buf[i] : '.');
|
|
p_printf("\"\n");
|
|
}
|
|
}
|