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

[Rahul]

is there any example for this ?

[Sigurd]

No examples uses this, but its very easy to use. Declare the static nrf_pwm_values_individual_t seq_values_new[] at top of main.c, after the includes (You are already doing this in the code you uploaded) .

Then you can use it like this to update the PWM duty cycle for the channel you want.

seq_values[0].channel_0 = my_new_value; // New value for channel 0

nrf_pwm_values_t new_pwm_values; 

new_pwm_values.p_individual = seq_values;

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values);

[Sigurd]

So you can try something like this:

						if(accel_values.x > 0000 && accel_values.x < 8000)
					{  // LED 1 blinking, other led off


seq_values[0].channel_0 = 50;
seq_values[0].channel_1 = 0;
seq_values[0].channel_2 = 0;
seq_values[0].channel_3 = 0;

nrf_pwm_values_t new_pwm_values; 

new_pwm_values.p_individual = seq_values;

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values);


					}
					
					
					if(accel_values.x > 8000 && accel_values.x < 10000)
					{ LED 2 blinking, other led off

seq_values[0].channel_0 = 0;
seq_values[0].channel_1 = 50;
seq_values[0].channel_2 = 0;
seq_values[0].channel_3 = 0;

nrf_pwm_values_t new_pwm_values; 

new_pwm_values.p_individual = seq_values;

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values);


					}
					
												
						if(accel_values.x > 10000 && accel_values.x < 12000)
					{ LED 3 blinking, other led off
						
								
								
seq_values[0].channel_0 = 0;
seq_values[0].channel_1 = 0;
seq_values[0].channel_2 = 50;
seq_values[0].channel_3 = 0;

nrf_pwm_values_t new_pwm_values; 

new_pwm_values.p_individual = seq_values;

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values);
							
					}
					
					
						if(accel_values.x > 12000 && accel_values.x < 14000)
					{ LED 4 blinking, other led off
							

seq_values[0].channel_0 = 0;
seq_values[0].channel_1 = 0;
seq_values[0].channel_2 = 0;
seq_values[0].channel_3 = 50;

nrf_pwm_values_t new_pwm_values; 

new_pwm_values.p_individual = seq_values;

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values);


					}
					
					
						if(accel_values.x > 14000 && accel_values.x < 16000)
					{ //ALL LED blinking

seq_values[0].channel_0 = 50;
seq_values[0].channel_1 = 50;
seq_values[0].channel_2 = 50;
seq_values[0].channel_3 = 50;

nrf_pwm_values_t new_pwm_values; 

new_pwm_values.p_individual = seq_values;

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values);


							
					}

[Rahul]

thank you sir using this i can improve my code

thank you so much nordic support team

[strengthstrong]

nrf_drv_pwm_sequence_values_update(&m_pwm0,1,new_pwm_values); seq_id is 1 ,not 0?