Hi, everyone,
here is the configuration of my system:
Linux version 2.4.22-uc0-fs2-rthal5 (un...@linux)
Processor: ARM/VLSI ARM 7 TDMI revision 0
RT memory manager v1.3 Loaded
RTDM Version 0.5.1
RTnet 0.7.0 - built on Jan 3 2006 01:20:51
rtai : 3.6
the flash disk is 4MB, the ram size 16MB.
we download the firmware using RTNET, the firmware size is 1KB.
during the testing,the firmware is downloaded and unzip and run again and again.
After about 20 times or more downloading, the RTNET seem can't work
correctly：the request data from the server gotten in RTNET API was not
updated and delayed to update when next request was coming.
here is the snapshot of source code:
void cb_recv (struct rtdm_dev_context *context, void *arg)
{
struct msghdr msg;
struct iovec iov;
int ret;
//struct sockaddr_in his_sin;
iov.iov_base = (void *)buffer;
iov.iov_len = sizeof(buffer);
msg.msg_name = &dest_addr;
msg.msg_namelen = sizeof(struct sockaddr_in);
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control=NULL;
msg.msg_controllen=0;
/* This demonstrates the fast path to the RTnet API for kernel modules.
Note that this method depends on using the correct RTDM version. An
alternative is to take the file descriptor from a global variable or
pass it in the callback argument "arg" and then call the official API
functions. */
ret = context->ops->recvmsg_rt(context, 0, &msg, 0);
if ((ret > 0) && (msg.msg_namelen == sizeof(struct sockaddr_in))) {
parse_bus_msg ((sbm_t*)buffer, ret);
}
}
the buffer is not updated correctly when error happens.
what is wrong with RTNET? Have you got an idea ?
Thank you for all!
Kity
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