fix(demo): fix cdc ecm string check

sakumisu · sakumisu · commit d50159638df9 · 2026-01-04T21:50:44.000+08:00
Signed-off-by: sakumisu &lt;1203593632@qq.com&gt;
diff --git a/demo/cdc_ecm_template.c b/demo/cdc_ecm_template.c
@@ -83,7 +83,7 @@ static const uint8_t *device_quality_descriptor_callback(uint8_t speed)
 
 static const char *string_descriptor_callback(uint8_t speed, uint8_t index)
 {
-    if (index > 3) {
+    if (index > 4) {
         return NULL;
     }
     return string_descriptors[index];

Original file line number	Diff line number	Diff line change
`@@ -83,7 +83,7 @@ static const uint8_t *device_quality_descriptor_callback(uint8_t speed)`
`83`	`83`
`84`	`84`	`static const char *string_descriptor_callback(uint8_t speed, uint8_t index)`
`85`	`85`	`{`
`86`		`- if (index > 3) {`
	`86`	`+ if (index > 4) {`
`87`	`87`	`return NULL;`
`88`	`88`	`}`
`89`	`89`	`return string_descriptors[index];`