ultrasonic sensor using vhdl

[swampythe47]

I am a vhdl beginner and i want to interface an ultrasonic sensor on fpga board using vhdl. Can someone please help me how can i do it?

[FlyingDutch]

Hello,

here you have few examples:

https://www.pantechsolutions.net/fpga-projects/fpga-implementation-of-distance-measurement-with-ultrasonic-sensor

https://forums.intel.com/s/question/0D50P00003yyS6ESAU/ultrasonic-sensor-hcsr04-vhdl-code?language=en_US



Basically the designs are based of measuring the time of sound echo.

Regards

[swampythe47]

the code in video is not working

[FlyingDutch]

Hello,

first of all:

1) What FPGA board are you using?
2) What software for syntesis are you using?
3) What errors you have?
4) Show code of your project

I am assuming that you are aware of fact that "user constraint file - ucf, xdc" for used FPGA ICs is needed (someone have to modify/create it for particular FPGA board).

Regards

[swampythe47]

I am using altera de1 board. There are no errors but the value doesnt change

[emece67]

.

[FlyingDutch]

Hi,

without seeing code I am not able to help you (show your project code). Crucial is also schematic showing how you attache the sensor to FPGA board (or photo). From what source do you powering you sensor? What is sensor type (model) - some have 5 Volt logic levels , in such case you need level converters.

Regards

[emece67]

.

[hamster_nz]

From back in November 2014.... (been published openly for a while, so isn't doing anybody's homework for them, other than maybe saving them from using Google)

http://hamsterworks.co.nz/mediawiki/index.php/Sonar

It works as described - ultrasonic sensor interfaced to FPGA displaying distance in cm on the 7-segment display.

Most of it is quite indirect - what is going on isn't going to be immediately obvious, especially to a beginner.

Free free to ask questions - but make them good questions!

Not "how does it work?" but "Where does the value '2900*2-1' come from?"