MSP432P401R Changing color of on-board LED

Volodymyr Sharovar

Other Parts Discussed in Thread: ENERGIA

Hello,

I got myself a LaunchPad development kit and I looked at the software examples specifically the out of the box example. In that example you can change to color of one of the LEDs. My question is is it possible to change the color of the LEDs using the msp.h header or do I need to use the APIs from the driverlib.h header to achieve this?

Any help will be greatly appreciated,

Thank you

over 8 years ago

0 Dennis McHenry over 8 years ago

Prodigy 20 points

You can control the color of the 3-color LED by using analogWrite() and using a value of 0-255 for each of the three pins that control the LED. For the MSP432 Those pins are named: RED_LED, GREEN_LED, and BLUE_LED.

The single-color red LED (named LED1) can only have its color changed by desoldering the current LED and replacing it with a comparably specced LED of the color you desire. (This is probably not what you wanted, but I included it just in case it was.)

Here's a quick snippet that creates a purplish color:

analogWrite( RED_LED , 64 ); // PWM at about one quarter intensity

analogWrite( BLUE_LED , 64 ); // PWM at about one quarter intensity

analogWrite( GREEN_LED , 0 ); // full off

And the color orange would be a tiny bit of green and blue, combined with a little red.

0 Volodymyr Sharovar over 8 years ago in reply to Dennis McHenry

Prodigy 30 points

Thank you for the reply. Which header do I include to use the analogWrite function?

0 Dennis McHenry over 8 years ago in reply to Volodymyr Sharovar

Prodigy 20 points

You won't need any include files. It's a part of the default included files.

0 Volodymyr Sharovar over 8 years ago in reply to Dennis McHenry

Prodigy 30 points

I guess I need to clarify I am using Keil microVision IDE. analogWrite seems to be part of Energia IDE. Plus it seems to be tied in to MSP430 and not MSP432. I was looking at this for reference: energia.nu/Tutorial_AnalogWrite.html.

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MSP432P401R Changing color of on-board LED