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phone.c: Removed comment about wait time extension

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Wait time extension commands are not implemented yet.
They are a nice-to-have for the future, since they would enable
the board to work with phones that expect a higher frequency.

With a wait time extension request towards the phone, SIMtrace could
signal the phone to wait for a longer time period while SIMtrace is
still waiting for a response from the SIM card.
This commit is contained in:
Christina Quast
2015-05-08 17:19:13 +02:00
parent 3b544a1217
commit 049772e688
1 changed files with 0 additions and 20 deletions
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20
firmware/src_simtrace/phone.c
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@@ -53,26 +53,6 @@
/// The USB device is in resume state
#define STATE_RESUME 5
/* WTX (Wait time extension):
* R-block PCB begins with (msb) 10 , ends with 000011 for WTX req, 100011 for WTX resp
*
* The standard says:
* Rule 3 — If the card requires more than BWT to process the previously received I-block, it transmits S(WTX
* request) where INF conveys one byte encoding an integer multiplier of the BWT value. The interface device
* shall acknowledge by S(WTX response) with the same INF.
* The time allocated starts at the leading edge of the last character of S(WTX response).
*/
// FIXME: Two times the same name for the define, which one is right?
//#define WTX_req 0b10000011
//#define WTX_req 0b10100011
// Alternatively:
/* For T = 0 Protocol: The firmware on receiving the NULL (0x60) Procedure byte from the card, notifies
it to the driver using the RDR_to_PC_DataBlock response. During this period, the reception of bytes
from the smart card is still in progress and hence the device cannot indefinitely wait for IN tokens on
the USB bulk-in endpoint. Hence, it is required of the driver to readily supply ‘IN’ tokens on the USB
bulk-in endpoint. On failure to do so, some of the wait time extension responses, will not be queued to
the driver.
*/
extern volatile uint8_t timeout_occured;
/*------------------------------------------------------------------------------