Unable to initialize W5100 using Arduino Pro Mini

Question

Hello, I am unable to initialize a W5100 module using an Arduino Pro Mini. I try setting the MAC and IP addresses but read invalid values thereafter. Here is the Arduino program along with the output: [code]void setup() { uint8_t mac = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED}; uint8_t local_ip = {192, 168, 1, 100}; Ethernet.begin(mac, local_ip); printMacAddress(); // OUTPUT: FF:FF:FF:FF:FF:FF printIpAddress(); // OUTPUT: 255.255.255.255 } void printMacAddress() { uint8_t mac[6]; W5100.getMACAddress(mac); Serial.print(mac[0], HEX); Serial.print(“:”); Serial.print(mac[1], HEX); Serial.print(“:”); Serial.print(mac[2], HEX); Serial.print(“:”); Serial.print(mac[3], HEX); Serial.print(“:”); Serial.print(mac[4], HEX); Serial.print(“:”); Serial.print(mac[5], HEX); Serial.println(); } void printIpAddress() { IPAddress ip = Ethernet.localIP(); Serial.println(ip); }[/code] I read in some blog posts that the Arduino may initialize before the W5100 initialization is completed so others recommend manually resetting the W5100 after Arduino initialization. So I connected the W5100 reset pin to the Arduino digital output 4 and reset the W5100 during setup using the following code. const int W5100_RESET_PIN = 4; pinMode(W5100_RESET_PIN, OUTPUT); digitalWrite(W5100_RESET_PIN, LOW); // Activate reset pin by asserting low delay(5); // Wait for 5 msec digitalWrite(W5100_RESET_PIN, HIGH); // Deactivate reset pin by asserting high delay(300); // Wait for W5100 to initialize I observed the W5100 resetting because the module LEDs flashed off and back on each time I manually reset the Arduino. However this does not fix the W5100 mac/IP initialization issue. How should I troubleshoot this issue? Here are pictures of the assembly. [url]https://imgur.com/a/h4TWx[/url] Here is an overview of the Arduino board. [url]https://www.arduino.cc/en/Main/ArduinoBoardProMini[/url] Here is an overview of the W5100 module. [url]http://arduino-info.wikispaces.com/Ethernet[/url] Here is the W5100 module schematic. [url]http://arduino-info.wikispaces.com/file/view/W5100Module_sch.pdf/294763632/W5100Module_sch.pdf[/url]

Edward · Answer

Hi… First, refer to below site and download library. (It is lastest update) Please Download ZIP button. github.com/Wiznet/WIZ_Ethernet_Library So, Delete the ethernet folder that has the original. Delete the ethernet folder that has the original. and this route to copy & paste to download file. Second, retry test. Thank you

igorsyl · Answer

I am using Arduino v1.6.7. Would the library WIZ Ethernet Arduino IDE 1.5.x work with Arduino 1.6.7 or should I use Arduino 1.5.x? Also, how should I proceed if this does not fix the issue? I am in a far timezone from you and our conversation may be delayed as a result.

igorsyl · Answer

Hello, I deleted the Arduino Ethernet library directory and replaced it with the library in your GitHub account. I am still unable to initialize the W5100. How should I keep debugging this issue? Thank you.

Coccoliso · Answer

hi, concerns little Arduino but… my hardware init sequence is : set CS and RST as output low RST high CS high RST set SPI config ( spi as master, oscdiv , clock idle low, clock rising edge , sample at middle ) enable SPI delay 500 usecs now set W5100: write on MR reg 0x80 value ( software reset ) (see note) set gateway set mac set subnet set ip address set memory sizes for TX and RX delay 800 msecs after a DHCP response ( if used ) you can reassign net parms starting from MR reg step and maybe that’s what you’re missing. Last 800 msecs time wait is a a certainty because the W5100 you should respond in 300/400 msecs while if you overdo it you can check the RDY pin and waste another IO to do it (I honestly prefer to wait a second). This works in many embedded sources but now you must find the functions that make it into Arduino’s dialect .