Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem


Problem: new socket

Posted by André Fernandes on January 26, 2010

I'm trying to implement the code below, but it stops in the line sock = socket(AF_INET, SOCK_DGRAM, 0);

the message is "sys_arch_timeouts: ptask != NULL"

the procedure sequence is:

-lwip_socket (type=0, protocol=100)
-alloc_socket (newcon=0x80173c)
-sys_sem_wait (sem=0x805ea8)
-sys_arch_timeouts ()
-sys_assert ()

I have already tried a TCP socket but got same problem.
I am using lwIP 1.3.0 and freeRTOS 5.3.0. uController: MCF51CN128.
Could anyone help me?

void test_UDP_send( void * pvParameters )

int sock;
struct sockaddr_in sLocalAddr, sDestAddr;
char reply[]="testing";
char buffer[1024];
int nbytes;

sock = socket(AF_INET, SOCK_DGRAM, 0);

memset((char *)&sLocalAddr, 0, sizeof(sLocalAddr));
memset((char *)&sDestAddr, 0, sizeof(sDestAddr));

sDestAddr.sin_family = AF_INET;
sDestAddr.sin_len = sizeof(sDestAddr);
sDestAddr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
sDestAddr.sin_port = 1234;

sLocalAddr.sin_family = AF_INET;
sLocalAddr.sin_len = sizeof(sLocalAddr);
sLocalAddr.sin_addr.s_addr = htonl(INADDR_ANY);
sLocalAddr.sin_port = 1235;

bind(sock, (struct sockaddr *)&sLocalAddr, sizeof(sLocalAddr));


nbytes=lwip_recv(sock, buffer, sizeof(buffer),8);
if (nbytes>0){
lwip_sendto(sock, buffer, nbytes, 0, (struct sockaddr *)&sDestAddr, sizeof(sDestAddr));

lwip_sendto(sock, reply, sizeof(reply), 0, (struct sockaddr *)&sDestAddr, sizeof(sDestAddr));
vTaskDelay( 200 ); //some delay!


RE: Problem: new socket

Posted by Dave on January 27, 2010
I suggest posting your question to the lwip mailing list.

RE: Problem: new socket

Posted by André Fernandes on January 27, 2010
I did it. Thanks

[ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ Sitemap ]    [ ]

Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS v10.2.0 is available for immediate download. MIT licensed, and including RISC-V and ARMv8-M (Cortex-M33) demos.

NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.

View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.


FreeRTOS and other embedded software careers at AWS.

FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Cadence Tensilica Cortes

Espressif ESP32

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers





STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS

Xilinx Microblaze and Zynq partner