iserial for USB device

[hexxter]

is it possible to set an unique iserial ?
then i can use a udev rule to bind fix multible devices without any problems

[ceres-c]

USB is handled by LUFA iirc, so you better check if the lib is configurable in this regard

[hexxter]

I think you should build this in an if anyone need it then a different version could be easy compiled

diff --git a/firmware/src/Descriptors.c b/firmware/src/Descriptors.c
index 1234567..89abcde 100644
--- a/firmware/src/Descriptors.c
+++ b/firmware/src/Descriptors.c
@@
 /* Device Descriptor Structure */
 const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
 {
     .Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
     .USBSpecification       = VERSION_BCD(2,0,0),
     .Class                  = USB_CSCP_NoDeviceClass,
     .SubClass               = USB_CSCP_NoDeviceSubclass,
     .Protocol               = USB_CSCP_NoDeviceProtocol,
     .Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
 
     /* Vendor and Product ID */
     .VendorID               = 0x03EB,
     .ProductID              = 0x204F,
     .ReleaseNumber          = VERSION_BCD(0,0,1),
 
-    .ManufacturerStrIndex   = STRING_ID_Manufacturer,
-    .ProductStrIndex        = STRING_ID_Product,
-    .SerialNumStrIndex      = 0,
+    .ManufacturerStrIndex   = STRING_ID_Manufacturer,
+    .ProductStrIndex        = STRING_ID_Product,
+    .SerialNumStrIndex      = STRING_ID_Serial,
 
     .NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
 };
@@
 /* String Descriptor Definitions */
 
 // Manufacturer and Product string descriptors are already defined above
 
+// New Serial Number string descriptor
+// Adjust the serial string (or generate dynamically) as needed.
+const USB_Descriptor_String_t PROGMEM SerialString =
+{
+    .Header                 = {.Size = USB_STRING_LEN(12), .Type = DTYPE_String},
+    .UnicodeString          = L"CHAM-123456"
+};
+
 /* A lookup table for the string descriptors. */
 const USB_Descriptor_String_t* const StringDescriptors[] =
 {
     [STRING_ID_Language]      = &LanguageString,
     [STRING_ID_Manufacturer]  = &ManufacturerString,
     [STRING_ID_Product]       = &ProductString,
+    [STRING_ID_Serial]        = &SerialString,
 };