C2000 F28027 with Embedded Coder to control a DC Motor

I K

Prodigy 120 points

Hallo to everybody,

I connected my LAUNCHXL-F28027 C2000 Piccolo LaunchPad with Matlab-Simulink and Code Composer Studio 5.

I am trying to control (output) a DC Motor with PWM from the microcontroller by using Simulink ( Embedded Coder).

As inputs , i do have 2 FSR connected to ADC Ports.

Right now the more i press the FSR1 the faster my motor turns Right.

the more i press the FSR2 the faster my motor turns Left.

Is there any idea how can i collect Data from the 2 Inputs (ADC-Ports) and compare those, in order to control how fast the motor will turn? And ofcourse when it will turn?

For example: 1) When i press the FSR with just a little power i wish to have no output.

2) When i press with a little bit more power then 1/2 total fastness.

So... something like dead zone or steps.

Thanks ,

John

over 8 years ago

0 Gaston_Melo_Arg over 8 years ago

Mastermind 7675 points

What about sending this adc values through UART to simulink then run script (m file) to display this values or what ever you need. You can check some matlab examples to get an idea (check the m file also).

In the past I used to used the CCSV3.3 to graphic using RTDX block.

Hope this help

Gastón

0 I K over 8 years ago in reply to Gaston_Melo_Arg

Prodigy 120 points

Hallo Gastón,

thank you for your reply!

Do you have any idea where can i find those kind of examples you mean?

John

0 Gautam Iyer over 8 years ago in reply to I K

Guru 192875 points

Hi John,

Here's the SCi transmit and Receive blocks that you can use for UART communication Gaston is talking about:
in.mathworks.com/.../c28xscireceive.html
in.mathworks.com/.../c28xscitransmit.html

Regards,
Gautam

0 I K over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

Hallo Gautam,

i do not see the reason to use SCI transmit. I am not interested to see results on PC ... or scope those.
I just need to read both FSR inputs in 2 different ADC Ports and then display their difference in PWM Output to control my motor.
Any idea? :)