I am running a USB cell modem via PPP in Embedded Linux. I can use AT commands via minicom to connect to the modem and interrogate the signal strength (AT+CSQ) when the PPP connection is not active. However, when it's active, this is not possible. Is there any way to retrieve the signal strength from a PPP connected USB cell modem whil...
I've seen embedded boards before that have an LED that flashes like a heartbeat to show that the board is still executing code. I'd like to do something similar on an embedded Linux board I'm working on. Given that it's a fairly trivial bit of code, it seems likely to me that someone has already written a daemon for Linux that does this,...
I am trying to cross-compile busybox but I am getting 'undefined reference' at the linking stage. Using nm, the symbol were in fact missing from the library file (libbb.a in my case.) Looking into the source ('busybox/libbb/xfuncs.c'), there are all these #ifdef L_<function_name> wrapping around the functions in question. Does anyone ...
Has anyone used check as the unit test framework in an embedded device which also requires cross-compilation? Is it even a good idea, or should I just use something else (e.g. embunit or similar)? If so, how should I write the Makefile.ams and configure.ac? I haven't used autotools to begin with so all this cross-compilation stuff cert...
From a C program I want to call a shell script with a filename as a parameter. Users can control the filename. The C is something like (initialization/error checking omitted): sprintf(buf, "/bin/sh script.sh \"%s\"", filename); system(buf); The target device is actually an embedded system so I don't need to worry about malicious use...
Hi, I wanted to know if any porting is available for back trace implementation for uclibc in arm that I can use in my signal handler to debug segmentation faults. I did come across a useful code here and tried using it inside my signal handler but it fails at the first check and returns from there. I also tried a recurcive backtrace...