Crash Ethernet with W5100

arduino / Arduino

Arduino IDE 1.x

https://www.arduino.cc/en/software

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Crash Ethernet with W5100 #1360

Closed JanosAudron closed 8 years ago

JanosAudron commented 11 years ago

Hardware: Arduino UNO + Ethernet Shield

Software: IDE 1.0.4 and 1.5.2

After some test I think the problem of the crash of W5100 chip that make it unresponsive is when you use an SD card, too. If you don't force pin 4 to HIGH, disabling the SD card, if these's a card insered the W5100 may become unresponsive. Maybe the bug is in SD library and not in Ethrnet library.

shulter commented 11 years ago

Did you disable the W5100's SPI when you access the SD card? You should pull CS_W5100 high, e.g. Pin 10 on the official ethernet shield.
You don't disable the SD card with pin 4 entirely, you just put it's SPI in a non-listening floating state so it won't interfere with the bus.
There's a bug concerning the W5100's SPI when it's disabled - some pins are not put in a high impedance state.

JanosAudron commented 11 years ago

During my tests I had never used the SD card, but if it's present without force the pin 4 to high the communication on ethernet may crash.

agdl commented 8 years ago

This issue was moved to arduino-libraries/Ethernet#12