Hi Guys,
I am using gadget serial on an arm board connected to a windows host pc
running minicom. Kernel version is 2.6.20.1.
Is there a way to detect if the gadget is connected from the gadget side?
Background is the following:
I open /dev/ttygserial in nonblocking mode on the start of my user
application. If the board is not connected at this point,
subsequent reads on this file descriptor fail with EAGAIN. If i then
connect the gadget, the read call still returns EAGAIN.
Re-opening /dev/ttygserial then makes it work.
Do i miss something here?
this is how i open the file:
fd = open("/dev/ttygserial", O_RDWR | O_NOCTTY | O_NONBLOCK);
if (fd < 0)
perror("open");
and this is how i read:
int numBytes = read(fd,buff,MAILBOXSIZE);
if (numBytes > 0) {
//process data
else
perror("read");
Best regards,
Andre
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