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feat(inventory): WL2:D trigger(6/7)+p_read loop with length + re-trigger

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lyrathorpe
2026-07-06 21:52:26 +01:00
parent edda57bdce
commit 2731d22266
1 changed files with 21 additions and 26 deletions
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code/inventory/scan.c
+21 -26
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@@ -1,27 +1,23 @@
/* /*
* scan.c - Phase 1: read the integral laser via WL2:D (reverse-engineered init). * scan.c - Phase 1: WL2:D scanner, trigger + read loop (reverse-engineered).
* *
* From disassembling SCANNER.DYL in the MX ROM, the scanner is driven over the * Confirmed from the previous build: opening WL2:D then issuing control ops 6
* SIBO I/O executive (int 0xCF), i.e. the p_iow(chan, func, ...) layer. After * and 7 triggers a scan (laser fires, green good-read LED). What was missing was
* opening WL2:D the driver is enabled with two control ops (function codes 6 * the read: a bare p_iow(chan, P_FREAD, buf) passes no length. This uses p_read
* then 7 on the channel), after which decoded barcodes can be read. Decoded * (which passes &len) to collect the decoded result, and re-triggers (ops 6/7)
* output is terminated by CR LF (default Symbol2 postamble 0x0D 0x0A). * each iteration so successive scans work without relying on the scan key.
* * Decoded output is CR/LF-terminated (default Symbol2 postamble).
* This is the first RE-based attempt: the enable-then-read path. The full config
* download (cl=0x0C command-byte writes) is not replicated here - if the driver
* applies Symbol2 defaults on open, enable+read should suffice; if not, we add
* the config writes next. Press the scan key to fire the laser.
*/ */
#include <plib.h> #include <plib.h>
#define WL2_ENABLE1 6 #define WL2_TRIG1 6
#define WL2_ENABLE2 7 #define WL2_TRIG2 7
GLDEF_C INT main(VOID) GLDEF_C INT main(VOID)
{ {
VOID *chan; VOID *chan;
UBYTE buf[256]; UBYTE buf[256];
INT err, r, i; INT err, n, i;
err = p_open(&chan, "WL2:D", (UINT)-1); err = p_open(&chan, "WL2:D", (UINT)-1);
p_printf("open WL2:D: %d\n", err); p_printf("open WL2:D: %d\n", err);
@@ -31,24 +27,23 @@ GLDEF_C INT main(VOID)
return 1; return 1;
} }
r = p_iow(chan, WL2_ENABLE1); p_printf("Present a barcode under the laser. Reads:\n\n");
p_printf("enable op6: %d\n", r);
r = p_iow(chan, WL2_ENABLE2);
p_printf("enable op7: %d\n", r);
p_printf("\nScan a barcode (press scan key). Dumping reads:\n\n");
for (;;) { for (;;) {
r = p_iow(chan, P_FREAD, buf); p_iow(chan, WL2_TRIG1); /* trigger a scan */
if (r < 0) { p_iow(chan, WL2_TRIG2);
p_printf("read status %d\n", r); n = p_read(chan, buf, sizeof(buf)); /* collect decoded result (with len) */
if (n < 0) {
p_printf("read %d\n", n);
continue; continue;
} }
p_printf("r=%d b0=%d:", r, buf[0]); if (n == 0)
for (i = 0; i < 24 && i < 256; i++) continue;
p_printf("n=%d:", n);
for (i = 0; i < n && i < 40; i++)
p_printf(" %d", buf[i]); p_printf(" %d", buf[i]);
p_printf(" \""); p_printf(" \"");
for (i = 0; i < 24 && i < 256; i++) for (i = 0; i < n && i < 40; i++)
p_putch(buf[i] >= ' ' ? buf[i] : '.'); p_putch(buf[i] >= ' ' ? buf[i] : '.');
p_printf("\"\n"); p_printf("\"\n");
} }