PWM control using accelerometer

[Rahul]

hello friends,

i need to control 4 LED brightness using PWM according to accelerometer values. how can i do that

i am using SDK11, nrf52832, KEIL MDK5

i going to attach main file what i am doing wrong please check and let me know main.txt

and if possible please let know how can i proceed in right way

[Sigurd]

Hi,

What kind of issues do you have ?

I see that you are setting the duty cycle to the same value 100 times in a row. That should not be necessary, E.g:

			    if(accel_values.x > 8000 && accel_values.x < 10000)
				{
					for(int i = 0; i <= 100; i++)
					{
						pwm_update_duty_cycle(25);
					}
				}

So remove these for(int i = 0; i <= 100; i++) loops, .i.e to

				if(accel_values.x > 8000 && accel_values.x < 10000)
				{
							
							pwm_update_duty_cycle(25);
				}

[Rahul]

hello sir, what i want to do is for this

if(accel_values.x > 8000 && accel_values.x < 10000)
                {
                    for(int i = 0; i <= 100; i++)
                    {
                        pwm_update_duty_cycle(25);
                    }
                }

one led should glow

and for other loop another led will glow

but for every loop only LED 1 is glowing how can i change this

[Sigurd]

If you take a look at the pwm_update_duty_cycle() function, you can see that this function is only changing the duty cycle of channel 0.

[Rahul]

yes because i am not able to use remaining 3 channels in different region can you explain how can i use remaining 3 channels in different region

[Sigurd]

For the PWM driver, you can use the function nrf_drv_pwm_sequence_values_update() with a new pointer to the new duty cycle values(nrf_pwm_values_individual_t) in order to change the duty cycle.