Trying to implement smart card reader with 3 slots on stm32f072. The reader for one card works quite well, but as soon as I try to add two more slots - there are problems. Knowing that CCID supports MultiSite I changed the descriptor file to the following:
0x09, /* bLength: Configuration Descriptor size */
USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
SMARTCARD_SIZ_CONFIG_DESC,
0x00,
0x01, /* bNumInterfaces: 1 interface */
0x01, /* bConfigurationValue: */
0x04, /* iConfiguration: */
0x80, /*bmAttributes: bus powered */
0x32, /* MaxPower 100 mA */
/******************** CCID **** interface ********************/
0x09, /* bLength: Interface Descriptor size */
0x04, /* bDescriptorType: */
0x00, /* bInterfaceNumber: Number of Interface */
0x00, /* bAlternateSetting: Alternate setting */
0x03, /* bNumEndpoints: 3 endpoints used */
0x0B, /* bInterfaceClass: user's interface for CCID */
0x00, /* bInterfaceSubClass : */
0x00, /* nInterfaceProtocol : None */
0x05, /* iInterface: */
/******************* CCID class descriptor ********************/
0x36, /* bLength: CCID Descriptor size */
0x21, /* bDescriptorType: Functional Descriptor type. */
0x10, /* bcdCCID(LSB): CCID Class Spec release number (1.00) */
0x01, /* bcdCCID(MSB) */
0x02, /* bMaxSlotIndex :highest available slot on this device */
0x03, /* bVoltageSupport: bit Wise OR for 01h-5.0V 02h-3.0V
04h 1.8V*/
0x01,0x00,0x00,0x00, /* dwProtocols: 0001h = Protocol T=0 */
0x10,0x0E,0x00,0x00, /* dwDefaultClock: 3.6Mhz = 3600kHz = 0x0E10,
for 4 Mhz the value is (0x00000FA0) :
This is used in ETU and waiting time calculations*/
0x10,0x0E,0x00,0x00, /* dwMaximumClock: Maximum supported ICC clock frequency
in KHz. So, 3.6Mhz = 3600kHz = 0x0E10,
4 Mhz (0x00000FA0) : */
0x00, /* bNumClockSupported : no setting from PC
If the value is 00h, the
supported clock frequencies are assumed to be the
default clock frequency defined by dwDefaultClock
and the maximum clock frequency defined by
dwMaximumClock */
0xCD,0x25,0x00,0x00, /* dwDataRate: Default ICC I/O data rate in bps
9677 bps = 0x25CD
for example 10752 bps (0x00002A00) */
0xCD,0x25,0x00,0x00, /* dwMaxDataRate: Maximum supported ICC I/O data
rate in bps */
0x00, /* bNumDataRatesSupported :
The number of data rates that are supported by the CCID
If the value is 00h, all data rates between the default
data rate dwDataRate and the maximum data rate
dwMaxDataRate are supported.
Dont support GET_CLOCK_FREQUENCIES
*/
0x00,0x00,0x00,0x00, /* dwMaxIFSD: 0 (T=0 only) */
0x00,0x00,0x00,0x00, /* dwSynchProtocols */
0x00,0x00,0x00,0x00, /* dwMechanical: no special characteristics */
0x38,0x00,EXCHANGE_LEVEL_FEATURE,0x00,
/* dwFeatures: clk, baud rate, voltage : automatic */
/* 00000008h Automatic ICC voltage selection
00000010h Automatic ICC clock frequency change
00000020h Automatic baud rate change according to
active parameters provided by the Host or self
determined 00000100h CCID can set
ICC in clock stop mode
Only one of the following values may be present to
select a level of exchange:
00010000h TPDU level exchanges with CCID
00020000h Short APDU level exchange with CCID
00040000h Short and Extended APDU level exchange
If none of those values : character level of exchange*/
0x0F,0x01,0x00,0x00, /* dwMaxCCIDMessageLength: Maximum block size + header*/
/* 261 + 10 */
0x00, /* bClassGetResponse*/
0x00, /* bClassEnvelope */
0x00,0x00, /* wLcdLayout : 0000h no LCD. */
0x00, /* bPINSupport : no PIN verif and modif */
0x03, /* bMaxCCIDBusySlots */
/******************** CCID Endpoints ********************/
0x07, /*Endpoint descriptor length = 7*/
0x05, /*Endpoint descriptor type */
CCID_BULK_IN_EP, /*Endpoint address (IN, address 1) */
0x02, /*Bulk endpoint type */
LOBYTE(CCID_BULK_EPIN_SIZE),
HIBYTE(CCID_BULK_EPIN_SIZE),
0x00, /*Polling interval in milliseconds */
0x07, /*Endpoint descriptor length = 7 */
0x05, /*Endpoint descriptor type */
CCID_BULK_OUT_EP, /*Endpoint address (OUT, address 1) */
0x02, /*Bulk endpoint type */
LOBYTE(CCID_BULK_EPOUT_SIZE),
HIBYTE(CCID_BULK_EPOUT_SIZE),
0x00, /*Polling interval in milliseconds*/
0x07, /*bLength: Endpoint Descriptor size*/
0x05, /*bDescriptorType:*/
CCID_INTR_IN_EP, /*bEndpointAddress: Endpoint Address (IN)*/
0x03, /* bmAttributes: Interrupt endpoint */
LOBYTE(CCID_INTR_EPIN_SIZE),
HIBYTE(CCID_INTR_EPIN_SIZE),
0x18 /*Polling interval in milliseconds */
I also forcibly changed the response to the command RDR_to_PC_NotifySlotChange assignment 3Fh, which corresponds to the presence of cards in 3 slots. Windows provides and refers only to the slot 0.
Wanted to implement a composite usb, but ran into a problem - available only for stm32f072 7 endpoints, whereas for PCSC is needed for every 3 EP.
I was desperate to find a mistake. Can someone tell me how to solve this problem?