* descriptor does not exist.\r
*/\r
#define NO_DESCRIPTOR 0\r
+\r
+ #if (!defined(NO_INTERNAL_SERIAL) && (defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR))) || defined(__DOXYGEN__)\r
+ /** String descriptor index for the device's unique serial number string descriptor within the device.\r
+ * This unique serial number is used by the host to associate resources to the device (such as drivers or COM port\r
+ * number allocations) to a device regardless of the port it is plugged in to on the host. Some USB AVRs contain\r
+ * a unique serial number internally, and setting the device descriptors serial number string index to this value\r
+ * will cause it to use the internal serial number.\r
+ *\r
+ * On unsupported devices, this will evaluate to NO_DESCRIPTOR and so will force the host to create a pseduo-serial\r
+ * number for the device.\r
+ */\r
+ #define USE_INTERNAL_SERIAL 0xDC\r
+ #else\r
+ #define USE_INTERNAL_SERIAL NO_DESCRIPTOR\r
+ #endif\r
\r
/** Macro to calculate the power value for the device descriptor, from a given number of milliamps. */\r
#define USB_CONFIG_POWER_MA(mA) (mA >> 1)\r
uint8_t SerialNumStrIndex; /**< String index for the product's globally unique hexadecimal\r
* serial number, in uppercase Unicode ASCII.\r
*\r
+ * \note On some AVR models, there is an embedded serial number\r
+ * in the chip which can be used for the device serial number.\r
+ * To use this serial number, set this to USE_INTERNAL_SERIAL.\r
+ * On unsupported devices, this will evaluate to 0 and will cause\r
+ * the host to generate a pseudo-unique value for the device upon\r
+ * insertion.\r
+ *\r
* \see ManufacturerStrIndex structure entry.\r
*/\r
\r
#endif\r
} USB_Descriptor_String_t;\r
\r
- /* Function Prototypes: */\r
- /** Function to retrieve a given descriptor's size and memory location from the given descriptor type value,\r
- * index and language ID. This function MUST be overridden in the user application (added with full, identical \r
- * prototype and name except for the \ref ATTR_WEAK attribute) so that the library can call it to retrieve descriptor \r
- * data.\r
- *\r
- * \param wValue The type of the descriptor to retrieve in the upper byte, and the index in the \r
- * lower byte (when more than one descriptor of the given type exists, such as the\r
- * case of string descriptors). The type may be one of the standard types defined\r
- * in the DescriptorTypes_t enum, or may be a class-specific descriptor type value.\r
- * \param wIndex The language ID of the string to return if the wValue type indicates DTYPE_String,\r
- * otherwise zero for standard descriptors, or as defined in a class-specific\r
- * standards.\r
- * \param DescriptorAddress Pointer to the descriptor in memory. This should be set by the routine to\r
- * the address of the descriptor.\r
- *\r
- * \note By default, the library expects all descriptors to be located in flash memory via the PROGMEM attribute.\r
- * If descriptors should be located in RAM or EEPROM instead (to speed up access in the case of RAM, or to\r
- * allow the descriptors to be changed dynamically at runtime) either the USE_RAM_DESCRIPTORS or the \r
- * USE_EEPROM_DESCRIPTORS tokens may be defined in the project makefile and passed to the compiler by the -D\r
- * switch.\r
- *\r
- * \return Size in bytes of the descriptor if it exists, zero or \ref NO_DESCRIPTOR otherwise\r
- */\r
- uint16_t USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)\r
- ATTR_WARN_UNUSED_RESULT ATTR_WEAK ATTR_NON_NULL_PTR_ARG(3);\r
-\r
/* Private Interface - For use in library only: */\r
#if !defined(__DOXYGEN__)\r
/* Macros: */\r
projects / pub / USBasp.git / blobdiff