RGB LED with NRF5340

Question

Hi, 
 I need your help to know "How to control RGB LED using PWM in nrf5340?". I have already tried the "RGB_led" sample in NRFconnect SDK v1.5.0 
 But can't able to control my led. Kindly Support me to understand the Project and also to get output. 
 Thanks & Regards 
 Navin Chakravarthy K

Priyanka · Accepted Answer

Hi Navin, 
 I guess there was a bit of a confusion in what I mentioned yesterday. I get that an RGB Led is a multicolour LED but there is no such LED on nrf5340 DK. It has just 4 green LEDs. 
 
 But if you need to run the 'rgb_led' example with an RGB Led, then you will have to use an external analog RGB Led and also, create a .overlay file with the necessary pwm leds initialised. You can do it like I mentioned yesterday. 
 Priyanka said: Making any changes in the main.c file may cause errors so it would be better if this change is reflected in the .dts file. For which, you don't have to modify that, but you can create a .overlay file inside the ''rgb_led'' folder . Here, you can mention the changes that you want to see in the .dts file (the LEDs you wish to set). 
 
 I will attach my .overlay file for your reference. Also, make sure your RGB led pins are connected to the proper pins and you can calculate the resistance required by using your voltage supply and current limit from the datasheet of the RGB Led. 
 
 As for controlling the LED, you could try making changes in the main.c of the 'rgb_led' example. At present, it runs as per a for loop with a specific count that is defined. You could try changing this. In case you need to control them via buttons, you may have to again define them in the .overlay file. 
 5305.nrf5340dk_nrf5340_cpuapp.overlay 
 Hope this helps. 
 Kind Regards, 
 Priyanka

RGB LED with NRF5340

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