LED Dimming Driver | Dataford Interview Questions

Write a driver for dimming an LED using a microcontroller.

Implement dim_led(start, target, max_step, resolution) to return the PWM compare-register values needed to move from start brightness to target brightness. Include the target value, change by no more than max_step between consecutive values, and move monotonically toward the target.

Inputs are integers. Brightness values must be in [0, resolution], and max_step must be positive. Return a list of integers, including the final target value.

Constraints

0 <= start <= resolution
0 <= target <= resolution
1 <= max_step <= resolution
1 <= resolution <= 65535
Return values must be integers between 0 and resolution
The output must include the target value

Function Signature

def dim_led(start, target, max_step, resolution):

Your question is LED Dimming Driver. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Write a driver for dimming an LED using a microcontroller.

Inputs are integers. Brightness values must be in [0, resolution], and max_step must be positive. Return a list of integers, including the final target value.

Constraints

0 <= start <= resolution
0 <= target <= resolution
1 <= max_step <= resolution
1 <= resolution <= 65535
Return values must be integers between 0 and resolution
The output must include the target value

Function Signature

def dim_led(start, target, max_step, resolution):

Your question is LED Dimming Driver. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.