Posted on May 14, 2018 at 14:20Hello Every One,
I am writing a TCP client on STM32F427 MCU using netconn API. My device is able to connect three times out of ten times. it seems the problem with netconn_connect() api. please help with this.
Note:
netconn_connect() is not coming back with any return value most of the times. void StartDefaultTask(void const * argument)
{
/* init code for LWIP */
MX_LWIP_Init();
IP4_ADDR(&local_ip,192,168,100,60);
IP4_ADDR(&remote_ip,192,168,100,61); //192.168.100.61
printf('\r\nremote ip adress:%s\r\n',ip4addr_ntoa(&remote_ip));
printf('\r\nlocal ip adress:%s\r\n',ip4addr_ntoa(&local_ip));
//netif_set_up(&gnetif);
conn = netconn_new(NETCONN_TCP);
printf('\r\n%d',conn);
printf('\r\nstate: %d',conn->state);// this is printing zeros every times
if((netconn_bind(conn,&local_ip,23))==ERR_OK)// bind to local device IP
{
printf('\nnetconn_bind succeed\n');
//vTaskDelay(100);
osDelay(10);
if((netconn_connect(conn,&remote_ip,23))==ERR_OK)// Connect to remoter FTP Server
{
printf('\nconnect\n');
osDelay(10);
netconn_write(conn, (char *)'12345678', 8, NETCONN_NOFLAG);
printf('\r\nstate: %d',conn->state);
osDelay(100);
netconn_write(conn, (char *)'12345678', 8, NETCONN_NOFLAG);
printf('\r\nstate: %d',conn->state);
osDelay(100);
netconn_write(conn, (char *)'12345678', 8, NETCONN_NOFLAG);
printf('\r\nstate: %d',conn->state);
osDelay(100);
netconn_close(conn);
netconn_delete(conn);
for(;;)
{
printf('\r\nHello');
osDelay(1000);
}
/* USER CODE END StartDefaultTask */
}
