I got a T41 breakout PCB made that has an RJ-45 header and needed capacitor configured. I'm having several issues:
1. Without the Teensy attached, I am observing T+, T-, R+ and R- all shorted together. It's likely I have errors with the board...but I need to confirm what I should observe. In this configuration, I've read that Ts and Rs should appear as shorts to an ohm-meter. (Please confirm) If this is correct, my only issue is that the Ts got shorted to the Rs at some point.
2. The library I tried to use failed and said that it could not detect the ethernet shield. Does this mean the RJ-45 jack is malfunctioning, or the Teensy can't communicate with its onboard hardware?
3. The RJ-45 LED does not illuminate when a cable is plugged in. I verified continuity and verified that the LED illuminates when supplied with external voltage. I'm not sure if the Teensy has to run code for the LED to illuminate or if it supposed to happen based only on electircal connection. Please confirm.
4. I'll take any hints on debug procedures to figure out what's happening.
I'm using the below RJ-45 header. The pin numbering isn't the same as the PJRC site because the connector is different.
https://lcsc.com/product-detail/Eth...N-Zhongshan-HanRun-Elec-HR911105A_C12074.html
1. Without the Teensy attached, I am observing T+, T-, R+ and R- all shorted together. It's likely I have errors with the board...but I need to confirm what I should observe. In this configuration, I've read that Ts and Rs should appear as shorts to an ohm-meter. (Please confirm) If this is correct, my only issue is that the Ts got shorted to the Rs at some point.
2. The library I tried to use failed and said that it could not detect the ethernet shield. Does this mean the RJ-45 jack is malfunctioning, or the Teensy can't communicate with its onboard hardware?
3. The RJ-45 LED does not illuminate when a cable is plugged in. I verified continuity and verified that the LED illuminates when supplied with external voltage. I'm not sure if the Teensy has to run code for the LED to illuminate or if it supposed to happen based only on electircal connection. Please confirm.
4. I'll take any hints on debug procedures to figure out what's happening.
I'm using the below RJ-45 header. The pin numbering isn't the same as the PJRC site because the connector is different.
https://lcsc.com/product-detail/Eth...N-Zhongshan-HanRun-Elec-HR911105A_C12074.html