Project needs multiple PWM

Question

I'm working on a project that needs three (or more) PWM pins to work. But unlike Arduino, the Raspberry PI B+ has just one PWM pin. I've searched for solutions and I found that I can use the WiringPi to emulate PWM using software. Is this the best solution? Anybody has a better one?

score 2 · Accepted Answer · edited Dec 17 '18 at 19:02

2

The Raspberry Pi B+ has two accessible dedicated hardware PWM channels.

Hardware timed PWM is available on all the accessible GPIO.

See my pigpio library.

edited Dec 17 '18 at 19:02

Community

1

answered Jan 18 '16 at 13:13

joan

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score 2 · Answer 2 · answered Jan 18 '16 at 18:37

Studying the WiringPI library I found that I can easily handle the PWN on any pin:

# GPIO port numbers  
import wiringpi2 as wiringpi  
wiringpi.wiringPiSetupGpio()  
wiringpi.pinMode(25, 0) # sets GPIO 25 to input  
wiringpi.pinMode(24, 1) # sets GPIO 24 to output  
wiringpi.pinMode(18, 2) # sets GPIO 18 to PWM mode

Project needs multiple PWM

2 Answers2