Now need pwm_driver demo5 duty ratio, is there any way to 1/6 or 1/8?

[creator]

How do you do Now need pwm_driver demo5 duty ratio, is there any way to 1/6 or 1/8?PWM and phase difference is 4 road？ Ask for a few days, change seq_values [], but how to change?Try to success.

[Sigurd]

Hi,

What PWM frequencyand duty cycle[%] do you want to set?

PS: You don't have to create a new question, you can add a comment here.

Click on "add a comment"

[creator]

How do you do Is the need to change the duty ratio, demo5 duty ratio here is 1/4 and the phase difference, want to change duty ratio, here because there is phase, Nordic PWM phase is not easy to implement.

[Sigurd]

You will need to change the seq_values[] to change the duty ratio. The .top_value in your code is 15625.

E.g. for channel 0 (pin 2 in your code), you will need OR the 0x8000 with 7812 (.top_value/2), to get 1/8 duty ratio:

static nrf_pwm_values_individual_t /*const*/ seq_values[] =
{
    { 0x8000 | 7812 ,      0,      0,      0 },
    {      0, 0x8000,      0,      0 },
    {      0,      0, 0x8000,      0 },
    {      0,      0,      0, 0x8000 }
};

To get 1/6 ratio, you need to use 15625/3 = 5208:

static nrf_pwm_values_individual_t /*const*/ seq_values[] =
{
    { 0x8000 | 5208 ,      0,      0,      0 },
    {      0, 0x8000,      0,      0 },
    {      0,      0, 0x8000,      0 },
    {      0,      0,      0, 0x8000 }
};

The 0x8000 is here used to set bit 15 to 1, in order to invert the PWM output. See this post.

[creator]

How do you do If the value is "15625" how to set the duty ratio of the change, according to set the bluetooth communication. Top_value, then the static nrf_pwm_values_individual_t const / * * / seq_values [] will follow change, how to set?

[Sigurd]

If you want to change/update the seq_values 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)