projects:rfid_exploration
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projects:rfid_exploration [2013/12/19 17:44] jpatterson [FPGA and Verilog] |
projects:rfid_exploration [2013/12/19 18:02] (current) mcruthven |
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| {{ projects:spoofer_signal_close.jpg?550 }}// | {{ projects:spoofer_signal_close.jpg?550 }}// | ||
| Close up of spoofer signal.// | Close up of spoofer signal.// | ||
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| + | {{ projects:digitalreader.jpg?550 }}// | ||
| + | RFID reader signal after comparator. This signal was processed by the FPGA into the RFID card data.// | ||
| ==== FPGA and Verilog ==== | ==== FPGA and Verilog ==== | ||
| - | {{projects:fpga_reader.jpg}} | + | {{ projects:fpga_reader.jpg?600 }} |
| We tested our code in MATLAB before we implemented it in Verilog. We designed our MATLAB code with Verilog in mind. We designed our MATLAB code so that was a loop and updated the extracted code with each cycle of the code. We also avoided division and multiplication which helped make the transition to Verilog easy. | We tested our code in MATLAB before we implemented it in Verilog. We designed our MATLAB code with Verilog in mind. We designed our MATLAB code so that was a loop and updated the extracted code with each cycle of the code. We also avoided division and multiplication which helped make the transition to Verilog easy. | ||
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| We made a 125kHz square wave with the FPGA and used it to drive our reader circuit. The FPGA could not supply enough current for the circuit, so we added a buffer before the coil. We did not accomplish the goal of getting a FPGA RFID reader to work, because we did not but the Verilog we developed on the FPGA. If we were to pursue this project then we would have to put the Verilog on the FPGA and figure out what the counting threshold is for the two different frequency waves. | We made a 125kHz square wave with the FPGA and used it to drive our reader circuit. The FPGA could not supply enough current for the circuit, so we added a buffer before the coil. We did not accomplish the goal of getting a FPGA RFID reader to work, because we did not but the Verilog we developed on the FPGA. If we were to pursue this project then we would have to put the Verilog on the FPGA and figure out what the counting threshold is for the two different frequency waves. | ||
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| + | All of the code is saved in RFID exploration code folder. | ||
| ==== Spoofer ==== | ==== Spoofer ==== | ||
projects/rfid_exploration.1387493061.txt.gz ยท Last modified: 2013/12/19 17:44 by jpatterson
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