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4 posts / 0 new
Last post
Mon, 2017-10-23 09:06
#1
timactive
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Last seen:3 years 6 months ago
加入:2017-09-25 20:54
Need more pwm signal

Hi,
For the project i need 8 PWM signal, 2 * RGBW.
I actually use the timer2,i use the example demo_timer2, it is working fine for RGB. I have also implement this with homekit.
But after my analyse i no see how i can generate other PWM signal, just for your information i use addon homekit, it is possible?

Thank you in advance!

Keywords:
PWM
Device:
DA1468x
Mon, 2017-10-23 16:50
MT_dialog
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Last seen:2 months 1 week ago
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加入:2015-06-08 11:34
Hi timactive,

Hi timactive,

I will assume that the device that you are using is a 68x (you mention that you are using the 6.0.2 SDK which corresponds to the 585 SoC). Regarding the PWM, in total you can generate:

  • Using timer 0: two PWM signals of the same frequency but inverted (PWM0 and PWM1).
  • Using timer 1: one PWM signal with configurable frequency and duty cycle and automatically connected to the P0_6 pin when the device is in sleep mode (PWM5 - the only timer that keeps on running while in sleep mode).
  • Using timer 2: three PWM signals with programmable duty cycle from 0% to 100%. (PWM2, PWM3, PWM4).
  • 使用呼吸计时器:PW之一M signal which you can configure to generate a constant PWM signal.

Please check the datasheet for more informations regarding the timer block.

Thanks MT_dialog

Accepted answer
Mon, 2017-10-23 17:39
(Reply to #2)
timactive
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Last seen:3 years 6 months ago
加入:2017-09-25 20:54
Thank you very well for your

Thank you very well for your quickless response.
I'm really happy that DA14681 can already generate so much signal.
I will try to implement depending your answer.

Just for my curiosity if I need to generate other signal on other output, what would be the most interesting timer timer0, timer1, ... to use for make soft PWM?

Sorry if I have newbie questions, but I'm learning(hard working) while waiting for a more experienced person who should come into my company.
.

Tue, 2017-10-24 16:36
(Reply to #3)
MT_dialog
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Hi timeactive,

Hi timeactive,

I am not able to understand the question, can you please re-phrase, what do you mean "other signal on other output" and "soft PWM" ? Since the timers are capable in generating PWM i dont see a reason for using timer interrupts in order to generate a PWM.

Thanks MT_dialog