# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1695847590 0
# Node ID f4a7ac90cf3901d4b16c756d7b2ca95c7ba6ebc3
# Parent  3bde280f0986b4f741c43adebd283bcfddd0ff66
cp2102-decode-ee-desc: decode textual ID strings

diff -r 3bde280f0986 -r f4a7ac90cf39 cp2102/decode_usb_desc.c
--- a/cp2102/decode_usb_desc.c	Wed Sep 27 20:15:57 2023 +0000
+++ b/cp2102/decode_usb_desc.c	Wed Sep 27 20:46:30 2023 +0000
@@ -122,6 +122,35 @@
 	printf("  wLANGID[2]:      0x%04X\n", desc[6] | (desc[7] << 8));
 }
 
+static void
+print_string_desc(headline, desc, maxlen)
+	char *headline;
+	u_char *desc;
+	unsigned maxlen;
+{
+	u_char *sp, *endp;
+	unsigned uni;
+
+	if (desc[0] < 2 || desc[0] > maxlen || desc[0] & 1 || desc[1] != 0x03) {
+		printf("%s INVALID\n", headline);
+		return;
+	}
+	printf("%s \"", headline);
+	endp = desc + desc[0];
+	for (sp = desc + 2; sp < endp; sp += 2) {
+		uni = sp[0] | (sp[1] << 8);
+		if (uni < 0x20 || uni > 0x7E) {
+			printf("\\u%04X", uni);
+			continue;
+		}
+		if (uni == '"' || uni == '\\')
+			putchar('\\');
+		putchar(uni);
+	}
+	putchar('"');
+	putchar('\n');
+}
+
 main(argc, argv)
 	char **argv;
 {
@@ -142,6 +171,8 @@
 	print_endpoint_desc(eeprom + 0x3B3);
 	printf("USB string descriptor 0 at 0x3800:\n");
 	print_string_desc_0(eeprom + 0x200);
-	/* decoding of other string descriptors remains to be implemented */
+	print_string_desc("Manuf string:  ", eeprom + 0x3C3, 60);
+	print_string_desc("Product string:", eeprom + 0x208, 254);
+	print_string_desc("Serial# string:", eeprom + 0x307, 128);
 	exit(0);
 }