Hi, I am trying to write a program that can use a Omron Smartcard-Reader V4KU-01JF-001 (connected to the USB) to read, well, Smartcards.
I am starting fresh on a lot of subjects here, so please be gentle if my questions do not immediately make sense. I am trying to learn this stuff and will gladly follow any pointer given... I tried to adapt the test-libhid.c program to my needs (my application is being written in C++). I have sucessfully initialized the library, can enumerate devices, and can finally hid_open() my device. Next would be communicating with it. Frankly: I do not know how to do that. Documentation for the device is at: http://www.marian-aldenhoevel.de/tmp/V4KU-01.zip Output from lsusb -d 0590:0034 -vvv is at: http://www.marian-aldenhoevel.de/tmp/lsusb Say I wanted to issue the very first command to the card-reader, that would propably be "(00) Initial Reset", as described in section 7.1 of the "Data transmission Spec" in the zip pointed to above. I gather that I need to call hid_set_output_report with correct values for PATHOUT, PATHLEN, PACKET and SEND_PACKET_LEN. The data I would have to send would at the core, the level of the device-command be ASCII 'C00', or (0x43,0x30,0x30). Prepended by 0x00, 0x03 for the LEN, described in section 4.1.1 that would be (0x00,0x03,0x43,0x30,0x30) The first thing I don't understand is the Report-ID. Is that an integral part of the PACKET I am constructing and passing to hid_set_output_report()? If so, how do I find the ID needed? My first guess would be the table in Section 4.1.1 of the specs that just gives a Report-ID based on the length of the command and it's parameters. In case of "(00) Initial Reset" that length would be 4 and I would select Report-ID 0x02, because it specifies a length of 11 bytes. So my packet would be padded "Padding data so that the report length is satisfied" to 11 bytes for a total of: (0x02,0x00,0x03,0x43,0x30,0x30,0x00,0x00,0x00,0x00,0x00); Those 11 bytes would be my PACKET, and the SEND_PACKET_LEN is 11. Does that make sense so far? My second question is about the PATH. I cannot make sense of the description in test_libhid.c under "How to write to and read from a device". Can someone please take a look at my lsusb -vvv output (link above) and explain again for dummies? Ciao, MM _______________________________________________ libhid-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss
