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28 Threads found on Pwm Vhdl
You code is very confusing, seemingly having garbage you left form other program ( e.g pwm signal ). You don't manage reset signal (rst) anywhere, as well I2C_SCLK isn't used. Do you really expect to see it working ?
Well your testbench instances a component called 'SPI' and 'pwm01', but those entities are never defined. Similarly, 'head' calls out 'main' and 'pwm', but those entities are not defined. I think you're confusing the entity/component name with the label. You probably want to say 'UUT : head port map(...'. Additionally, you don't need to define
if counter < 10000 then pwm <= '1'; else pwm <= '0'; end if; Change 10000 to 500000. Did you check the pinout? Are you sure that the output levels of your board are set to 3.3V ?
There are plenty of existing IP cores for pwm available (, but it's also fairly simple to write it yourself in VDHL/Verilog.
I found a web site gives pwm generator with multiple phases output ,however it is supposed the pwm frequency is given , what should I modify the code so that any pwm frequency can input to the vhdl code
I wonder if you want to make the pwm period equal 50001 instead of 50000 clock cycles?
1.Did you simulate your design? 2.What's the pwm frequency that you're trying to generate? I know that hobby grade servos work at around 400Hz - not 10KHz...
I am trying to control two Futaba S3003 servo motor with a basys2 board. I understand that the servo works of pulse width modulation and have done the required calculations to create the correct pulse widths. I have written the implementation constraints to output on the the JA and JB terminals. I have tested the system with an oscilloscope/mul
hi i need a vhdl code for pwm generation for boost converter..i want to generate a pwm by comparing a output of pi controller with triangular wave(counter) plz help me in this..m complete new to vhdl/.
1. Complete vhdl Project 2. As of now im using Single Phase. only one H-Bridge with 4 switches. 3. Generating the pulses from comparing values of sine samples(lookup table) to triangular samples(up/down counter) 4. Im able to generate sine pwm and want to update my design for closed loop design. 5. What is a matrix converter? 6. Are there any
Have you connected an O-scope to the pin you are intending to use for your pwm signal. I would think your issue is more than likely your signal and not just identifying a pin in the constraint file. My suggestion would be to set up a counter from (0 to Period) where period is the value (which depends on you clock rate) that equates to 20 ms. Next
..hi guys..others project is time code generator on fpga and generated time code have to do is the code i wrote but not getting code i used /100 counter as actual serial data and /10 to compare it and change duty cycle.....i.e each serial data pluse time=10 times /10 counter output pulse width..given code has some un
It could be that pwm_out becomes bigger than 255 and thus fall out of the range of 8 bit. But like TrickyDicky wrote, the line indication is line 1347. You should have a look at that line.
lvhdl code for generation of pam,ppm & pwm waveforms using xilinx software.... plz do reply......its urgent
If you meen "seeing" in hardware, you'll need a digital-to-analog conversion means. For low data rates, a pwm modulated pin with a low-pass can do. But involves additional logic. Some DevKits are equipped with DAC hardware, I think.
yes..i know vhdl. some of it. state machine that I had build for a car a red signal in modelsim where it supposed to be a pwm enable and a pwm signal what you mean by car? red signal in modelsim? pwm? i dont get it.. if is not related to the thread title, then can you post another thread for it?
pls help, i m doing my final year project.. which is a (8bit) vhdl model of three phase pwm. i have written vhdl code for the pwm. in the embedded design, i need to write a c-program to generate 3 phase sine waves to the port 1 of the TSK51a microprocessor that will communicate with the vhdl model. (also (...)
hi, am doing project in three phase pwm rectifier for harmonic reduction.can any one send me the vhdl code for three phase pwm generation using sinusoidal pwm technique.pwm rectifier consists of 6 MOSFET switchs.the conduction of each switch is 120 degree and interval between 2 switchs is 60 degrees.the (...)
Hello, I just wondering wht's the way to sample the pwm signal in vhdl so that to design an integrator with pwm signal as input.
*only exact solution will get the reward. URGENT SOLUTION NEEDED. Problem: i want to count number of pulses of a DC motor operated at +5v. the clock used in controller was 50MHz. The Design consist of PID (16-bit output,8-bit input and feedback) +pwm.the #of pulses[