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5ca29d0ba9
By setting PiBlasterPeriod to a raspi.Adaptor, the PWM pin will now reflect the correct duty cycle to /dev/pi-blaster. Signed-off-by: Mark Kuo <starryalley@gmail.com>
47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
package raspi
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import (
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"errors"
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"testing"
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"gobot.io/x/gobot/gobottest"
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"gobot.io/x/gobot/sysfs"
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)
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var _ sysfs.PWMPinner = (*PWMPin)(nil)
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func TestPwmPin(t *testing.T) {
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pin := NewPWMPin("1")
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gobottest.Assert(t, pin.Export(), nil)
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gobottest.Assert(t, pin.Enable(true), nil)
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val, _ := pin.Polarity()
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gobottest.Assert(t, val, "normal")
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gobottest.Assert(t, pin.InvertPolarity(true), nil)
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val, _ = pin.Polarity()
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gobottest.Assert(t, val, "normal")
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period, err := pin.Period()
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gobottest.Assert(t, err, errors.New("Raspi PWM pin period not set"))
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gobottest.Assert(t, pin.SetDutyCycle(10000), errors.New("Raspi PWM pin period not set"))
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gobottest.Assert(t, pin.SetPeriod(20000000), nil)
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period, _ = pin.Period()
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gobottest.Assert(t, period, uint32(20000000))
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gobottest.Assert(t, pin.SetPeriod(10000000), errors.New("Cannot set the period of individual PWM pins on Raspi"))
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dc, _ := pin.DutyCycle()
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gobottest.Assert(t, dc, uint32(0))
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// call currently fails in test
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gobottest.Refute(t, pin.SetDutyCycle(10000), nil)
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dc, _ = pin.DutyCycle()
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gobottest.Assert(t, dc, uint32(10000))
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gobottest.Assert(t, pin.SetDutyCycle(999999999), errors.New("Duty cycle exceeds period."))
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dc, _ = pin.DutyCycle()
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gobottest.Assert(t, dc, uint32(10000))
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// call currently fails in test
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gobottest.Refute(t, pin.Unexport(), nil)
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}
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