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Mat mat at spoked.ca-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 > try to enter the interactive mode and then issue the commands and > see how far you get. Good idea. Interestingly enough, the process hangs when launching the sam7 utility. I don't even get to the interactive command prompt. There is something I don't fully understand in the documentation. It says on ubuntu the device is mapped on /dev/ttyACMx using the cdc_cam. If I rmmod cdc_cam, the sam7 utility cannot find /dev/at91_0. To make it work I have to symlink /dev/ttyACM0 to /dev/at91_0... How does the device get mapped to /dev/at91_0? Trying to address with libusb this way, the strace ends with: open("/dev/at91_0", O_RDWR) = 3 write(3, "N#", 2) = 2 nanosleep({0, 2000000}, NULL) = 0 read(3, "\n", 2) = 1 nanosleep({0, 2000000}, NULL) = 0 write(3, "wFFFFF240,4#", 12) = 12 nanosleep({0, 2000000}, NULL) = 0 read(3, "\n", 4) = 1 nanosleep({0, 2000000}, NULL) = 0 fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb77bb000 write(1, "Page size info of not known\n", 29Page size info of not known ) = 29 exit_group(1) Trying to go down the POSIX path: open("/dev/ttyUSB0", O_RDWR) = 3 write(3, "N#", 2) = 2 nanosleep({0, 2000000}, NULL) = 0 read(3, ^C I also tried removing libusb before recompiling sam7, but this gives me the same output for POSIX. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iF4EAREIAAYFAk8m41wACgkQsluIOvRklpiDQQEAnUan2RW7r1MzplXfE/wk1GXy 6++s2iDK7w1zQuTkB7gA/2FVqQQLp3RvHlv9d80Omxw7f+ZXRI0QEnXvMFqoSgI1 =tarC -----END PGP SIGNATURE-----