Example Code For Onboard Switches TMS320C5535 eZDSP Kit

Mitchell Bennett

Other Parts Discussed in Thread: TMS320C5535

Hello,

I have the TMS320C5535 eZDSP kit and I was able to "port" it to make it compatible with the example projects found in the C5000 teaching ROM. I am currently able to compile and execute the guitar effects example project from the C5000 teaching ROM and it sounds GREAT!

The way the program works is that it cycles through guitar effects based on a timer. I am interested in modifying the code to cycle through the guitar effects by pressing one of the on-board Push Buttons. I don't need assistance switching guitar effects, I however do require assistance reading the status of the Push Button.

Could someone please provide me with some code to add to my project to read the status of one of the on-board push buttons?

I have included the project folder that I wish to add the code to.

Mitch3404.Guitar_Test.zip

Best Regards,

over 11 years ago

0 Mark M over 11 years ago

TI__Mastermind 30120 points

Hi Mitch,

Those buttons on the C5535 eZdsp are connected to a single analog SAR input.

The combinations of button presses result in different resistor dividers altering the voltage to the SAR pin.

I believe there is an example of the pushbuttons_read() in chapter 20 of the teaching rom.

Also study the Spectrum Digital C5535 eZdsp examples or the SAR CSL examples (C55XCSL-LOWPOWER).

Hope this helps,
Mark

0 Mitchell Bennett over 11 years ago in reply to Mark M

Prodigy 100 points

Thanks for your reply.

I was able to use the example code provided by Spectrum digital to read the switches.

Best Regards,

Mitch

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Example Code For Onboard Switches TMS320C5535 eZDSP Kit