Hi Stephen,
Maybe your workaround is not a safe way to overcome the problem: at that
point the pcb chain is already corrupted (and probably unrecoverable?).
What compiler/toolchain are you using?
Enrico
On 13/10/2015 11:48, Sylvain Rochet wrote:
Hi Stephen,
On Tue, Oct 13, 2015 at 10:15:42AM +0200, Sylvain Rochet wrote:
On Mon, Oct 12, 2015 at 04:59:19PM -0500, Stephen Cowell wrote:
On 10/12/2015 3:41 PM, Sylvain Rochet wrote:
On Mon, Oct 12, 2015 at 02:51:14PM -0500, Stephen Cowell wrote:
I find that I sometimes get an infinite loop when stepping to
pcb->next...
I didn't have to read further. As usual, it looks like a broken port or
usage which violate lwIP threading model.
Summary:
- Do *NOT* call anything in interrupt context, nothing, never,
absolutely never, use your OS semaphore signaling to an
Ethernet/serial/… RX thread
I don't think I'm doing that, Sylvain... this is non-OS, so there
are no 'threads'. Atmel wrote the port. I'm running sntp and ftpd, they
hook in using their own _init() routines that have not been
modified.
But there are probably interrupts, which is even worse. Could you first
check that no lwIP functions are called in interrupts contexts ?
Probably around the macb driver.
If I have time I will fetch the Atmel port for SAM4E/bare-metal and
take a short look at it.
It looks sane from a quick look. I don't really understand why there are
not using sys_check_timeouts() and rewrote everything in the ethernet.c
"static timers_info_t gs_timers_table[]" stuff. Since you are having
issue in timers context could you check this part is ok ? Removing all
the Atmel timers stuff and calling sys_check_timeouts() in the main loop
could be an easy check.
Sylvain
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