Fpga_dev Posted May 16, 2016 Share Posted May 16, 2016 I want to interface RFID module RC522 to nexys 4 through SPI but dont know which ports to use as spi pins are already interfaced with accelerometer Link to comment Share on other sites More sharing options...
Commanderfranz Posted May 16, 2016 Share Posted May 16, 2016 hi Fpga_dev, As I mentioned in this post. You can use any of the pmod ports using a SPI controller written in VHDL or Verilog. The SPI pins that are interfaced to the accelerometer are dedicated for it's use. Kaitlyn Link to comment Share on other sites More sharing options...
Fpga_dev Posted May 17, 2016 Author Share Posted May 17, 2016 thanks a lot, I am using now pmod pins and using this code but I am only getting busy signal high , kindly guide me if this code is fine or not, or if you can recommend me some other code, NewSpi master.txt Link to comment Share on other sites More sharing options...
D@n Posted May 17, 2016 Share Posted May 17, 2016 Did you forget the Chip Select line as part of your master controller. It's a required part of the SPI protocol for framing purposes. Dan Link to comment Share on other sites More sharing options...
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I want to interface RFID module RC522 to nexys 4 through SPI but dont know which ports to use as spi pins are already interfaced with accelerometer
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