fix raspi PWMPin.SetDutyCycle (#800)

raspi: PWMPin.SetDutyCycle - value 0 is allowed in pi blaster - for pi-blaster, duty should not going below 2us, unless the duty is 0
hybridgroup · Apr 24, 2022 · 3bfba27 · 3bfba27
1 parent 3b3ad4d
commit 3bfba27
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/platforms/raspi/pwm_pin.go b/platforms/raspi/pwm_pin.go
@@ -83,9 +83,10 @@ func (p *PWMPin) SetDutyCycle(duty uint32) (err error) {
 	p.dc = duty
 
 	val := gobot.FromScale(float64(p.dc), 0, float64(p.period))
-
+	
 	// never go below minimum allowed duty for pi blaster
-	if val < 0.05 {
+	// unless the duty equals to 0
+	if val < 0.05 && val != 0 {
 		val = 0.05
 	}
 	return p.piBlaster(fmt.Sprintf("%v=%v\n", p.pin, val))