Hi,
I am now testing lwip-socket by modifying safertos_demo example. My
development environments are LM3S9B96, StellarisWare 10636, ccs 5.4.x,
lwip-1.3.2, f=80Mhz
TCP Listener task is implemented to communicate with Unix server(using
lwip-socket) and this listener task runs concurrently with other tasks used
in safertos_demo example : led_task, idle_task, lwip_task, and
display_task(spider and web server modules are not used).
*1. setup tcp ip socket service.*
//
// Setup the remaining services inside the TCP/IP thread's context.
//
tcpip_callback(SetupServices, 0);
*2. Initialize lwip-socket in SetupServices()*
lwip_socket_init();
*3. Make cmdListnerTaskInit() in cmdListener_task*
if(xTaskCreate(cmdListenerTask, (signed portCHAR *)"TCP_LISTENER",
(signed portCHAR *)g_pulcmdListenerTaskStack,
sizeof(g_pulcmdListenerTaskStack), NULL,
PRIORITY_CMDLISTENER_TASK,
NULL) != pdPASS)
{
return(1);
}
TaskCreated();
*4. Make main task function, cmdListenerTask(void *pvParameters)*
// Setup the local address.
memset((char *) &sClient, 0, sizeof(sClient));
sClient.sin_family = AF_INET;
sClient.sin_len = sizeof(sClient);
sClient.sin_addr.s_addr = lwIPLocalIPAddrGet();
sClient.sin_port = htons(sPort);
//setup the destination address
memset((char *) &sDestAddr, 0, sizeof(sDestAddr));
sDestAddr.sin_family = AF_INET;
sDestAddr.sin_len = sizeof(sDestAddr);
sDestAddr.sin_addr.s_addr = inet_addr("192.2.0.3");// for test,
hard-corded
sDestAddr.sin_port = htons(sPort);
while(1)
{
while((socket_fd = lwip_socket(AF_INET, SOCK_DGRAM, 0)) == 0)
{
xTaskDelay(CHGD_OPEN_TIME);
}
//bind socket to the local address and port
lwip_bind(socket_fd, (struct sockaddr *) &sClient, sizeof(sClient));
//receive from server
length = lwip_recvfrom(socket_fd, (char *) msg_buf, sizeof(msg_buf),
MSG_DONTWAIT, (struct sockaddr *)&sDestAddr, &size);
if(length > 0)
{
sMsg = (NET_MSG *) (msg_buf);
mon_cmd_do(socket_fd, &sDestAddr, sMsg, length);
}
lwip_close(socket_fd);
}
*5. call cmdListnerTaskInit() in main()*
The scenario is as lwip_task is running, the client IP is assigned from
server(DHCP) and bind lwip-socket with the given IP, so I LWIP_DHCP and
LWIP_SOCKET are defined in lwipopts.h.
Ths priority of each task is led_task= 3, cmd Listener_task =1,
display_task=2
As I test this:
*1. led_task keeps flashing*
*2. IP is sent to the client but it doesn't display(Wireshark tells IP was
sent to client from server)*
*3. Idle_task seems like not working. That's why running time and RX packet
don't show up on LED.*
*4. If cmd Listener task is suspended, other tasks work fine.(using
xTaskSuspend()).*
So far I don't see any clues to figure this out. Whenever I try to debug,
the safeRTOS scheduler shows me "Failed to start scheduler", so I don't
know how possibly to look inside.
What do I make a mistake?
Regards,
Jin
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