Control Speed of DC Motor Using PWM FPGA

This article deals with the design pulse width modulation using field programmable gate arrays in order to control the speed of small DC motor, We need to counter, data and comparator that generate the signal of PWM. We can gate on the output of pwm that drive the speed of motor by use the peripherals inside the board FPGA. This article explains how we can gate on the data of components (counter, data, comparator) by use the language VHDL. The program ISE13 by XILINX supports this language. We need too to clock which we can obtain inside the board FPGA. But the frequency of this clock is very high and we have to divide this value by use the clock manager and the counter. When we finish the write of program, we can see the signal of PWM by oscilloscope. We control the signal by change the PWM frequency using switches that exist on the board.