hello,
I'm working on a project for a new sensor with ethernet connectivity,
modbus TCP for data and a kind of discovery function with udp packets
for identificationdata. During the sensor is working well, there are
sometime packet retransmission and after a cupple of minutes or when I
send new data over UDP to the sensor the software got stuck. This is the
first time for me that I use the lwip stack in a project. I've tried to
set the parameters into the lwipopts.h file without success.
In this function get stuck:
tcp_fasttmr(void)
{
struct tcp_pcb *pcb;
++tcp_timer_ctr;
tcp_fasttmr_start:
pcb = tcp_active_pcbs;
while (pcb != NULL) {
if (pcb->last_timer != tcp_timer_ctr) { <------ exactly here!
Enclosed you find a wireshark data file. My setup is the following:
- xmc4400 from Infineon
- KSZ8081 Phy from Microchip
- RTOS: CMSIS
- Freemodbus Library for Modbus TCP
- lwip 2.2
The freemodbus library uses the TCP Raw library and the upd discovery
function the netconn api. We have one thread for modbusTCP, one for the
sensor data (ADC) and one for the discovery function (UDP Netconn API).
I tried to implement the netconn API for TCP into the freemodbus library
without success. I don't know exactly if I'm having a memory leak or
another problem.
I'm a bit lost in the jungle and I would appreciate a lot if somebody
could me lead to the right way, so that I could solve this problem.
Please don't excitate to ask me. I have done a lot of things and right
now I don't know exactly which information is important to find a solution.
Thank you in advance.
Pablo Ledergerber
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