Hi there,
in my project a Sparkfun RFID-Shield (13,56 MHz) and an ethernet shield should be used at the same time. As this doesn't work and I had to deal with a similar problem earlier I'd like to know which ports the ethernet shield occupies.
Thank you in advanve
Arduino2013
http://arduino.cc/en/Main/ArduinoEthernetShield says
"Arduino communicates with both the W5100 and SD card using the SPI bus (through the ICSP header). This is on digital pins 11, 12, and 13 on the Duemilanove and pins 50, 51, and 52 on the Mega. On both boards, pin 10 is used to select the W5100 and pin 4 for the SD card. These pins cannot be used for general i/o. On the Mega, the hardware SS pin, 53, is not used to select either the W5100 or the SD card, but it must be kept as an output or the SPI interface won't work."
The pin usage on the Arduino UNO would be the same as the Duemilanove. If your Arduino does not have an ATmega168 or ATmega328P processor (Leonardo, etc) you will have to look up which pins are used for SPI.
Also A0 and A1 are used too (by SD card as SDA and SCL)
Thank you for your answer. But now I've got a problem: There are ports that are used by the Ethernet Shield and the display. So my question is if the TX and RX ports (D0 and D1) can be used for the display or not.
Thanks
arduino2013
Are the occupied pins the same for Arduino UNO R3 and Arduino Duemilanove?
I have the Arduiino UNO R3
arduino2013:
Thank you for your answer. But now I've got a problem: There are ports that are used by the Ethernet Shield and the display. So my question is if the TX and RX ports (D0 and D1) can be used for the display or not.
What 'display'?
Looks like the Sparkfun RFID-Shield (13,56 MHz) can be jumpered for D7/D8 or RX/TX (D0/D1). The Ethernet shield doesn't use D7 or D8 so that shouldn't be a problem. Were you planing to use the XBee connector (D9/D10 or RX/TX)?