W5100 Listen issue

Question

Hi, I am trying to setup my W5100 module in server mode. I have done the necessary settings, like configuring the GAR, SHAR etc). I am able to ping the W5100 and after the OPEN command the socket status register’s value is 0x13. But I am not able to set the listen command. After executing the listen command the socket status register does not give 0x14. The status of my Link Leds are Green Led = Constant ON with no blinking. Orange Led = blinking Please let me know what cound be the issue. Thanks!!!

hjjeon0608 · Answer

Hi, Omer. I want to know your code. Please, post code. How to set mode register, command and etc. And I recommend to use reference code at WIZnet. Best regards.

Omer · Answer

Hi, I have attached the code files. Please review them and let me know what I am missing. I have done the following configurations: RTR = 6000 RCR = 3 GAR = 192.168.0.2 SUBR = 255.255.255.0 SHAR = 00:16:36:DE:58:F6 (This is just an dummy mac I am using) SIPR = 192.168.0.48 SysInt(0x55, 0x55). This sets 2kB for each socket of Tx and Rx. IMR = 0x01 S0_MR = 0x01 S0_PORT0 = 502 Thanks!!! wiznet_tcp.c (10.8 KB) wiznet.h (11.3 KB) wiznet.c (43.2 KB)

hjjeon0608 · Answer

Hi, Omer. I think your code is correct. So, I want to know your main functions. And I found strange code. uint8_t listen(SOCKET s) { uint8_t ucharStatus; ucharStatus = getSn_SR(0); if (ucharStatus == SOCK_INIT) { write_wiznet_reg(Sn_CR(s),Sn_CR_LISTEN); /* wait to process the command... */ while( read_wiznet_reg(Sn_CR(s)) ); /* ------- */ ucharStatus = getSn_SR(0); if(ucharStatus == SOCK_LISTEN) { ucharStatus = 0; } else { close(s); ucharStatus = 1; } } else { close(s); ucharStatus = 1; } return ucharStatus; } You use socket number together ‘0’ and ‘s’. So, please check whether it causes problem. Best regards.

Omer · Answer

Hi, I am calling the below function from main: uint32_t initWiznet(void) { //unsigned char MAC_ADDR[6]; uint8_t status = 0x01; /* Power the wiznet chip / GPIO_PinOutSet (gpioPortC, 1); Delay_ms(1); / Reset the wiznet chip */ ASSERT_WIZNET_RESET(); Delay_ms(1); init_usart0_for_wiznet(); DEASSERT_WIZNET_RESET(); setRTR(6000); /* Retry time = 600 ms*/ Delay_ms(1); setRCR(3); /* Retry count = 3 / Delay_ms(1); //setIMR(0x00); / Interrupt mask */ setGAR(); /* Gateway IP address / Delay_ms(1); setSUBR(); / Subnet mask / Delay_ms(1); setSHAR(); / MAC address / Delay_ms(1); setSIPR(); / Source IP address */ Delay_ms(1); SysInit(0x55, 0x55); /* TX = 8kB, RX = 8 kB / Delay_ms(1); setIMR(IR_SOCK(0)); / Enable the socket 0 interrupt */ Delay_ms(1); /* Configure the EFM32 for external interrupt from Wiznet chip */ NVIC_ClearPendingIRQ(GPIO_ODD_IRQn); NVIC_EnableIRQ(GPIO_ODD_IRQn); /* Configure PE13 as input / GPIO_PinModeSet(gpioPortE, 13, gpioModeInput, 1); / Set falling edge interrupt */ GPIO_IntConfig(gpioPortE, 13, false, true, true); write_wiznet_reg(Sn_IR(0), 0xff); /* Open the socket for server mode / temp = 1; / The below code is for testing purpose only It checks if :listen command is properly set. Else it loops forever. / while( temp) { socket(0, Sn_MR_TCP, 80, 0x00); temp = getSn_SR(0); temp = listen(0); } / Refer to GPIO_ODD_IRQHandler() for further packet processing Once connection has been establised, TCP packet processing will be carried out based on external interrupt on PE13 */ return status; } I am trying to connect to socket 0.

Omer · Answer

Hi, If my code looks Ok, then how can I debug this issues? Do I need to check something on my desktop side? If yes then how? Are there any tools which can help in debugging this issues?

hjjeon0608 · Answer

Hi, Omer. I wonder one point. If your MCU is so fast, listen command could be done before SOCK_INIT status changed. SOCK_CLOSED ------changing -------> SOCK_INIT | (listen command here) So, I recommend to use case(1) or debug with changing return value(2). switch(getSn_SR(s)) // check SOCKET status { // ------------ case SOCK_ESTABLISHED: // ESTABLISHED? if(getSn_IR(s) & Sn_IR_CON) // check Sn_IR_CON bit { printf("%d : Connect OK
",s); setSn_IR(s,Sn_IR_CON); // clear Sn_IR_CON } if((len=getSn_RX_RSR(s)) > 0) // check the size of received data { len = recv(s,buf,len); // recv if(len !=send(s,buf,len)) // send { printf("%d : Send Fail.len=%d
",s,len); } } break; // --------------- case SOCK_CLOSE_WAIT: // PASSIVE CLOSED disconnect(s); // disconnect break; // -------------- case SOCK_CLOSED: // CLOSED close(s); // close the SOCKET socket(s,Sn_MR_TCP,port,mode); // open the SOCKET break; // ------------------------------ case SOCK_INIT: // The SOCKET opened with TCP mode listen(s); // listen to any connection request from "TCP CLIENT" printf("%d : LOOPBACK_TCPS(%d) Started.
",s,port); break; default: break; } i.e. check status is SOCK_INIT then command listen. In your while, return value is always 1 if listen is failed. So change return value and then debug what is problem, status is not SOCK_INIT or status is SOCK_INIT but listen command is failed. Try and then reply again please. Best regards.

Omer · Answer

Hi, Thanks for your replies. The issues did seem to be with the delay. I added delay in the wiznet read function and made it same like the wiznet write function. The issue is resolved now. Thanks once again for your help!

Leytronix · Answer

Hi Omer, At the moment I am running into exactly the same issue with the W5100. I understand you solved it with a delay in the read function? I do not understand where that is since the W5100 first has to go into LISTEN mode before anything can be read… Can you explain that? Thanks, Tjerk