hi i made me the sc-reader from http://www.thur.de/org/gsho/reader/bscrdw/bscrdw.html (at the end of thepage !) and change it a little bit. i have already written software for reading out telephone cards, but i cant get it work with a i2c (2-wire) card (is i2c the same as 2-wire ???). first i make a reset RST 0 CLK 0 ulseep 1 RST 1 CLK 1 ulseep 1 RST 0 CLK 0 ulseep 1 then i make a i2c-start condition I/O 1 CLK 0 ulseep 1 I/O 0 ulseep 1 CLK 0 ulseep 1 then i send the device adressing bool devaddr[8]={1,0,1,0,a2,a1,a0,1}; //i suppose that a2 a1 a0 are for addressing one of the // 8x256 so every of the 256 could be set (2³ = 7 and a zero position makes 8) // i set them to 0 0 0 // i am not sure about this --> help for(int i=0;i<8;i++) { CLK 1 usleep 1 I/O (devaddr[i]); usleep 1 CLK 0 I/O 0 } now i try to read out hte acknowledge bit (i always get != 0) if i continue i am doing it that way: for(int i=1;i<=2080;i++) // it is a 2k-card 8*256 = 2048 + the acknowledge bits = 2080 { CLK 1 usleep 1 if(i%9 != 0) // i dont want to save the acknowledge and i dont wnat to check it(at the moment) buffer[i]=I/0 //read it out here usleep 1 CLK 1 usleep 1 } the i send the i2c stop condition CLK 1 usleep 1 I/0 1 usleep 1 CLK 0 I/O 0 but i coded something wrong !!! i need help with it , the device addressing and it would also be nice if somebody could explain me the diffrence between i2c and 2-wire (if there is one). thnx ! phil *************************************************************** Linux Smart Card Developers - M.U.S.C.L.E. (Movement for the Use of Smart Cards in a Linux Environment) http://www.linuxnet.com/smartcard/index.html ***************************************************************
