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libftdi Archives
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| From: | jry <jrysig@xxxxxxxxx> |
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| To: | Thomas Jarosch <thomas.jarosch@xxxxxxxxxxxxx> |
| Cc: | libftdi@xxxxxxxxxxxxxxxxxxxxxxx |
| Date: | Fri, 11 Nov 2016 04:55:30 +0100 |
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Hi Thomas, Thank you for your response. Here is gdb backtrace: #0 ftdi_transfer_data_done (tc=0x64a830) at /home/john/work/sigrok/libftdi/src/ftdi.c:1742 #1 0x00007ffff7b5bc85 in sigma_write_read (wbuf=0x7fffffffde10, wbuf_len=130, rbuf=0x61b450, rbuf_len=43008, devc=0x6425a0) at src/hardware/asix-sigma/protocol.c:165 #2 0x00007ffff7b5c1c7 in sigma_read_dram_rows (start_row=0, num_rows=42, data="" "'\354\031\205\031\005\032\005\032\005\032\205\032\005\033\005.\354\033\205\033\205\034\005\034\005\034\205\034\205\035\005\066\354\035\205\036\205\036\005\036\005\036\205\037\205\037\005>\354 \205 \205 \005 \005!\205!\205!\005E\354\"\005\"\205\"\205\"\005#\005#\205#\205L\354$\005$\005$\205$\205%\005%\005%\205S\354&\005&\005&\205&\205'\005'\005'\205Z\354!\205(\005(\005(\205)\205)\005)\005a\354)\205*\205*\005*\005+\205+\205+\005h\354)\005,\205,\205,\005-\005-\205-\205o\354-\005.\005.\205.\205/\005/\005/\205w\354\060\005\060\005\060\205\061\005\061\005\061\005\061\205~\354\062\005\062\005\062\205"..., devc=0x6425a0) at src/hardware/asix-sigma/protocol.c:304 #3 0x00007ffff7b5dd14 in download_capture (sdi=0x62f2d0) at src/hardware/asix-sigma/protocol.c:1099 #4 0x00007ffff7b5de88 in sigma_capture_mode (sdi=0x62f2d0) at src/hardware/asix-sigma/protocol.c:1150 #5 0x00007ffff7b5dee2 in sigma_receive_data (fd=-1, revents=0, cb_data=0x62f2d0) at src/hardware/asix-sigma/protocol.c:1170 #6 0x00007ffff7b2ef3a in fd_source_dispatch (source=0x630720, callback=0x7ffff7b5de91 <sigma_receive_data>, user_data=0x62f2d0) at src/session.c:130 #7 0x00007ffff764005a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #8 0x00007ffff7640400 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #9 0x00007ffff7640722 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #10 0x000000000040a28e in run_session () at session.c:700 #11 0x00000000004055de in main (argc=11, argv=0x7fffffffe288) at main.c:267 I can see infinite loop in function ftdi_transfer_data_done() on following lines: while (!tc->completed) { ret = libusb_handle_events_timeout_completed(tc->ftdi->usb_ctx, &to, &tc->completed); if (ret < 0) ... } libusb_handle_events_timeout_completed() returns ret == 0 and also tc->completed is 0. Inside libusb_handle_events_timeout_completed() function it is going through: int API_EXPORTED libusb_handle_events_timeout_completed(libusb_context *ctx,
struct timeval *tv, int *completed)
{
int r;
struct timeval poll_timeout;
USBI_GET_CONTEXT(ctx);
r = get_next_timeout(ctx, tv, &poll_timeout); <<< r == 0
if (r) {
/* timeout already expired */
return handle_timeouts(ctx);
}
retry:
if (libusb_try_lock_events(ctx) == 0) {
if (completed == NULL || !*completed) {
<<< completed == 0
/* we obtained the event lock: do our own event handling */
usbi_dbg("doing our own event handling");
r = handle_events(ctx, &poll_timeout);
<<< r == 0
}
<<< see ctx dump below
libusb_unlock_events(ctx); return r;
}
$2 = {debug = 0, debug_fixed = 0, event_pipe = {9, 10}, usb_devs = {prev = 0x64a980, next = 0x641cf0}, usb_devs_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, open_devs = {prev = 0x62f0e0, next = 0x62f0e0}, open_devs_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, hotplug_cbs = {prev = 0x62e2f0, next = 0x62e2f0}, hotplug_cbs_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, flying_transfers = {prev = 0x641df8, next = 0x641df8}, flying_transfers_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, fd_added_cb = 0x0, fd_removed_cb = 0x0, fd_cb_user_data = 0x0, events_lock = {__data = {__lock = 1, __count = 0, __owner = 18874, __nusers = 1, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = "\001\000\000\000\000\000\000\000\272I\000\000\001", '\000' <repeats 26 times>, __align = 1}, event_handler_active = 1, event_handling_key = 3, event_waiters_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, event_waiters_cond = {__data = {__lock = 0, __futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex = 0x0, __nwaiters = 0, __broadcast_seq = 0}, __size = '\000' <repeats 47 times>, __align = 0}, event_data_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __nusers = 0, __kind = 0, __spins = 0, __elision = 0, __list = {__prev = 0x0, __next = 0x0}}, __size = '\000' <repeats 39 times>, __align = 0}, event_flags = 0, device_close = 0, ipollfds = {prev = 0x631518, next = 0x62e588}, pollfds = 0x63c240, pollfds_cnt = 3, hotplug_msgs = {prev = 0x62e450, next = 0x62e450}, completed_transfers = {prev = 0x62e460, next = 0x62e460}, timerfd = 11, list = {prev = 0x7ffff6d11760 <active_contexts_list>, next = 0x61a218}} Please note that ftdi_transfer_data_done() function works fine when submitted "read" buffer (in function ftdi_read_data_submit) has the exact or smaller size than number of bytes we receive from the device. It hangs only when device returns smaller response than we required. Do you have any idea? Best regards Jan On Tue, Nov 8, 2016 at 1:12 PM, Thomas Jarosch <thomas.jarosch@xxxxxxxxxxxxx> wrote: Hi Jan, libftdi - see http://www.intra2net.com/en/developer/libftdi for details. |
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