Cannot set smartcard mode

[thierryfischer]

Hello,

When trying to play the smartcard_bbio.py script, it fails with the error "Cannot set smartcard mode, try again or reset hydrabus." I tried to reset it, but all the time the response is 'BBIO', it does not switch to 'CRD1' as expected in the script.

I have pulled the last version of HydraFW and correctly build and flash it according to the user guide, indeed with the firmware I am able to able to get ATR.

Please find below details about the system information:

> show system
HydraFW (HydraBus) v0.9-beta-49-g5a3a20a-dirty 2019-03-23
sysTime: 0x000157a3.
cyclecounter: 0xf6a12f45 cycles.
cyclecounter64: 0x00000000f6a12f54 cycles.
10ms delay: 1680027 cycles.

MCU Info
DBGMCU_IDCODE:0x100F6413
CPUID:        0x410FC241
Flash UID:    0x30001A 0x31374707 0x33373331
Flash Size:   1024KB

Kernel:       ChibiOS 4.0.4
Compiler:     GCC 4.9.3 20150529 (release) [ARM/embedded-4_9-branch revision 227977]
Architecture: ARMv7E-M
Core Variant: Cortex-M4F
Port Info:    Advanced kernel mode
Platform:     STM32F4x5 High Performance with DSP and FPU
Board:        HydraBus 1.0
Build time:   Apr  1 2019 - 11:14:50

Did anyone else experienced the same or manage to run that script correctly ?

Best regards,

[bvernoux]

Could you test using latest master as there is a fix related to BBIO mode https://github.com/hydrabus/hydrafw/commit/4995ea5ef4423df03318fdd1410aed138adba0e7 see issue Binary SPI communication errror #81

[thierryfischer]

Thanks, but the error is still present with that fix.

> show system
HydraFW (HydraBus) v0.9-beta-50-g4995ea5-dirty 2019-03-29
...

I am running it on a windows host.

[Baldanos]

Hi !

The readme says this script is made for Python 3.2+

I tested the following : Python 2.7.16 => Same error message as you Python 3.7.3 => Works fine

Can you please verify that you are using a correct Python version ?

[thierryfischer]

Thank you @Baldanos it works:

$ Python36-32/python bbio_smartcard/smartcard_bbio.py
Parsing ATR:
Convention direct: 0x3b
T0:  0x65
TB1: 0x0
TC1: 0x0, extra guard time integer N=0
TA2: absent, card in negotiable mode.
Historical bytes: 2063cbaba0
Traceback (most recent call last):
  File "bbio_smartcard/smartcard_bbio.py", line 280, in <module>
    convention = smartcard_parse_atr()
  File "bbio_smartcard/smartcard_bbio.py", line 253, in smartcard_parse_atr
    if protocol != 0:
UnboundLocalError: local variable 'protocol' referenced before assignment

Do you know where the incompatibility comes from in Python2.7 ? Byte encoding ?

Regards,

[Baldanos]

Looks like python2 does not do the same with the bytes() function. On line 71 of the script you have

hydrabus.write(bytes([BBIO_SMARTCARD]))

Python2 :

>>> bytes([0b00001011])
'[11]'

Python3 (correct) :

>>> bytes([0b00001011])
b'\x0b'

I'll let you close the issue if it work for you.

Thanks for reporting !