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options_test.go
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options_test.go
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// SPDX-FileCopyrightText: 2019 Kent Gibson <warthog618@gmail.com>
//
// SPDX-License-Identifier: MIT
package gpiocdev_test
import (
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/warthog618/go-gpiocdev"
"github.com/warthog618/go-gpiocdev/uapi"
"github.com/warthog618/go-gpiosim"
"golang.org/x/sys/unix"
)
func TestWithConsumer(t *testing.T) {
offset := 3
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
// default from chip
c := getChip(t, s.DevPath(), gpiocdev.WithConsumer("gpiocdev-test-chip"))
defer c.Close()
l, err := c.RequestLine(offset)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, "gpiocdev-test-chip", inf.Consumer)
err = l.Close()
assert.Nil(t, err)
// overridden by line
l, err = c.RequestLine(offset, gpiocdev.WithConsumer("gpiocdev-test-line"))
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, "gpiocdev-test-line", inf.Consumer)
}
func TestAsIs(t *testing.T) {
offset := 0
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
// leave input as input
l, err := c.RequestLine(offset, gpiocdev.AsInput)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, gpiocdev.LineDirectionInput, inf.Config.Direction)
l.Close()
l, err = c.RequestLine(offset, gpiocdev.AsIs)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, gpiocdev.LineDirectionInput, inf.Config.Direction)
err = l.Close()
assert.Nil(t, err)
// leave output as output
l, err = c.RequestLine(offset, gpiocdev.AsOutput())
assert.Nil(t, err)
require.NotNil(t, l)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, gpiocdev.LineDirectionOutput, inf.Config.Direction)
l.Close()
l, err = c.RequestLine(offset, gpiocdev.AsIs)
assert.Nil(t, err)
require.NotNil(t, l)
err = l.Close()
assert.Nil(t, err)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, gpiocdev.LineDirectionOutput, inf.Config.Direction)
}
func testLineDirectionOption(t *testing.T,
contraOption, option gpiocdev.LineReqOption, config gpiocdev.LineConfig) {
t.Helper()
offset := 2
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
// change direction
l, err := c.RequestLine(offset, contraOption)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.NotEqual(t, config.Direction, inf.Config.Direction)
l.Close()
l, err = c.RequestLine(offset, option)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, config.Direction, inf.Config.Direction)
err = l.Close()
assert.Nil(t, err)
// same direction
l, err = c.RequestLine(offset, option)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, config.Direction, inf.Config.Direction)
err = l.Close()
assert.Nil(t, err)
}
func testLineDirectionReconfigure(t *testing.T, createOption gpiocdev.LineReqOption,
reconfigOption gpiocdev.LineConfigOption, config gpiocdev.LineConfig) {
tf := func(t *testing.T) {
requireKernel(t, setConfigKernel)
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
// reconfigure direction change
l, err := c.RequestLine(offset, createOption)
assert.Nil(t, err)
require.NotNil(t, l)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.NotEqual(t, config.Direction, inf.Config.Direction)
l.Reconfigure(reconfigOption)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, config.Direction, inf.Config.Direction)
err = l.Close()
assert.Nil(t, err)
}
t.Run("Reconfigure", tf)
}
func TestAsInput(t *testing.T) {
config := gpiocdev.LineConfig{
Direction: gpiocdev.LineDirectionInput,
}
testChipAsInputOption(t)
testLineDirectionOption(t, gpiocdev.AsOutput(), gpiocdev.AsInput, config)
testLineDirectionReconfigure(t, gpiocdev.AsOutput(), gpiocdev.AsInput, config)
}
func TestAsOutput(t *testing.T) {
config := gpiocdev.LineConfig{
Direction: gpiocdev.LineDirectionOutput,
}
testLineDirectionOption(t, gpiocdev.AsInput, gpiocdev.AsOutput(), config)
testLineDirectionReconfigure(t, gpiocdev.AsInput, gpiocdev.AsOutput(), config)
}
func testEdgeEventPolarity(t *testing.T, s *gpiosim.Simpleton, l *gpiocdev.Line,
ich <-chan gpiocdev.LineEvent, activeLevel int, seqno uint32) {
t.Helper()
evtSeqno = seqno
s.SetPull(l.Offset(), activeLevel^1)
waitEvent(t, ich, nextEvent(l, 0))
v, err := l.Value()
assert.Nil(t, err)
assert.Equal(t, 0, v)
s.SetPull(l.Offset(), activeLevel)
waitEvent(t, ich, nextEvent(l, 1))
v, err = l.Value()
assert.Nil(t, err)
assert.Equal(t, 1, v)
err = l.Close()
assert.Nil(t, err)
}
func testChipAsInputOption(t *testing.T) {
t.Helper()
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath(), gpiocdev.AsInput)
defer c.Close()
// force line to output
l, err := c.RequestLine(offset, gpiocdev.AsOutput(0))
assert.Nil(t, err)
require.NotNil(t, l)
l.Close()
// request with Chip default
l, err = c.RequestLine(offset)
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, gpiocdev.LineDirectionInput, inf.Config.Direction)
}
func testChipLevelOption(t *testing.T, option gpiocdev.ChipOption,
isActiveLow bool, activeLevel int) {
t.Helper()
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath(), gpiocdev.AsInput, option)
defer c.Close()
s.SetPull(offset, activeLevel)
ich := make(chan gpiocdev.LineEvent, 3)
l, err := c.RequestLine(offset,
gpiocdev.WithBothEdges,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
ich <- evt
}))
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, isActiveLow, inf.Config.ActiveLow)
// can get initial state events on some platforms (e.g. RPi AsActiveHigh)
seqno := clearEvents(ich)
// test correct edge polarity in events
testEdgeEventPolarity(t, s, l, ich, activeLevel, seqno)
}
func testLineLevelOptionInput(t *testing.T, option gpiocdev.LineReqOption,
isActiveLow bool, activeLevel int) {
t.Helper()
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
s.SetPull(offset, activeLevel)
ich := make(chan gpiocdev.LineEvent, 3)
l, err := c.RequestLine(offset,
option,
gpiocdev.WithBothEdges,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
ich <- evt
}))
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, isActiveLow, inf.Config.ActiveLow)
testEdgeEventPolarity(t, s, l, ich, activeLevel, 0)
}
func testLineLevelOptionOutput(t *testing.T, option gpiocdev.LineReqOption,
isActiveLow bool, activeLevel int) {
t.Helper()
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset, option, gpiocdev.AsOutput(1))
assert.Nil(t, err)
require.NotNil(t, l)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, isActiveLow, inf.Config.ActiveLow)
v, err := s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, activeLevel, v)
err = l.SetValue(0)
assert.Nil(t, err)
v, err = s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, activeLevel^1, v)
err = l.SetValue(1)
assert.Nil(t, err)
v, err = s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, activeLevel, v)
err = l.Close()
assert.Nil(t, err)
}
func testLineLevelReconfigure(t *testing.T, createOption gpiocdev.LineReqOption,
reconfigOption gpiocdev.LineConfigOption, isActiveLow bool, activeLevel int) {
tf := func(t *testing.T) {
requireKernel(t, setConfigKernel)
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset, createOption, gpiocdev.AsOutput(1))
assert.Nil(t, err)
require.NotNil(t, l)
v, err := s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, activeLevel^1, v)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.NotEqual(t, isActiveLow, inf.Config.ActiveLow)
l.Reconfigure(reconfigOption)
inf, err = c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, isActiveLow, inf.Config.ActiveLow)
v, err = s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, activeLevel, v)
err = l.Close()
assert.Nil(t, err)
}
t.Run("Reconfigure", tf)
}
func TestAsActiveLow(t *testing.T) {
testChipLevelOption(t, gpiocdev.AsActiveLow, true, 0)
testLineLevelOptionInput(t, gpiocdev.AsActiveLow, true, 0)
testLineLevelOptionOutput(t, gpiocdev.AsActiveLow, true, 0)
testLineLevelReconfigure(t, gpiocdev.AsActiveHigh, gpiocdev.AsActiveLow, true, 0)
}
func TestAsActiveHigh(t *testing.T) {
testChipLevelOption(t, gpiocdev.AsActiveHigh, false, 1)
testLineLevelOptionInput(t, gpiocdev.AsActiveHigh, false, 1)
testLineLevelOptionOutput(t, gpiocdev.AsActiveHigh, false, 1)
testLineLevelReconfigure(t, gpiocdev.AsActiveLow, gpiocdev.AsActiveHigh, false, 1)
}
func testChipDriveOption(t *testing.T, option gpiocdev.ChipOption,
drive gpiocdev.LineDrive, values ...int) {
t.Helper()
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath(), option)
defer c.Close()
l, err := c.RequestLine(offset, gpiocdev.AsOutput(1))
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, drive, inf.Config.Drive)
for _, sv := range values {
err = l.SetValue(sv)
assert.Nil(t, err)
v, err := s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, sv, v)
}
}
func testLineDriveOption(t *testing.T, option gpiocdev.LineReqOption,
drive gpiocdev.LineDrive, values ...int) {
t.Helper()
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset, gpiocdev.AsOutput(1), option)
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, drive, inf.Config.Drive)
for _, sv := range values {
err = l.SetValue(sv)
assert.Nil(t, err)
v, err := s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, sv, v)
}
}
func testLineDriveReconfigure(t *testing.T, createOption gpiocdev.LineReqOption,
reconfigOption gpiocdev.LineConfigOption, drive gpiocdev.LineDrive, values ...int) {
tf := func(t *testing.T) {
requireKernel(t, setConfigKernel)
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset, createOption, gpiocdev.AsOutput(1))
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
err = l.Reconfigure(reconfigOption)
assert.Nil(t, err)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, drive, inf.Config.Drive)
for _, sv := range values {
err = l.SetValue(sv)
assert.Nil(t, err)
v, err := s.Level(offset)
assert.Nil(t, err)
assert.Equal(t, sv, v)
}
}
t.Run("Reconfigure", tf)
}
func TestAsOpenDrain(t *testing.T) {
drive := gpiocdev.LineDriveOpenDrain
// Testing float high requires specific hardware, so assume that is
// covered by the kernel anyway...
testChipDriveOption(t, gpiocdev.AsOpenDrain, drive, 0)
testLineDriveOption(t, gpiocdev.AsOpenDrain, drive, 0)
testLineDriveReconfigure(t, gpiocdev.AsOpenSource, gpiocdev.AsOpenDrain, drive, 0)
}
func TestAsOpenSource(t *testing.T) {
drive := gpiocdev.LineDriveOpenSource
// Testing float low requires specific hardware, so assume that is
// covered by the kernel anyway.
testChipDriveOption(t, gpiocdev.AsOpenSource, drive, 1)
testLineDriveOption(t, gpiocdev.AsOpenSource, drive, 1)
testLineDriveReconfigure(t, gpiocdev.AsOpenDrain, gpiocdev.AsOpenSource, drive, 1)
}
func TestAsPushPull(t *testing.T) {
drive := gpiocdev.LineDrivePushPull
testChipDriveOption(t, gpiocdev.AsPushPull, drive, 0, 1)
testLineDriveOption(t, gpiocdev.AsPushPull, drive, 0, 1)
testLineDriveReconfigure(t, gpiocdev.AsOpenDrain, gpiocdev.AsPushPull, drive, 0, 1)
}
func testChipBiasOption(t *testing.T, option gpiocdev.ChipOption,
bias gpiocdev.LineBias, expval int) {
tf := func(t *testing.T) {
requireKernel(t, biasKernel)
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath(), option)
defer c.Close()
l, err := c.RequestLine(offset, gpiocdev.AsInput)
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, bias, inf.Config.Bias)
if expval == -1 {
return
}
v, err := l.Value()
assert.Nil(t, err)
assert.Equal(t, expval, v)
}
t.Run("Chip", tf)
}
func testLineBiasOption(t *testing.T, option gpiocdev.LineReqOption,
bias gpiocdev.LineBias, expval int) {
tf := func(t *testing.T) {
requireKernel(t, biasKernel)
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset, gpiocdev.AsInput, option)
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, bias, inf.Config.Bias)
if expval == -1 {
return
}
v, err := l.Value()
assert.Nil(t, err)
assert.Equal(t, expval, v)
}
t.Run("Line", tf)
}
func testLineBiasReconfigure(t *testing.T, createOption gpiocdev.LineReqOption,
reconfigOption gpiocdev.LineConfigOption, bias gpiocdev.LineBias, expval int) {
tf := func(t *testing.T) {
requireKernel(t, setConfigKernel)
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset, createOption, gpiocdev.AsInput)
assert.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
l.Reconfigure(reconfigOption)
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, bias, inf.Config.Bias)
if expval == -1 {
return
}
v, err := l.Value()
assert.Nil(t, err)
assert.Equal(t, expval, v)
}
t.Run("Reconfigure", tf)
}
func TestWithBiasDisabled(t *testing.T) {
bias := gpiocdev.LineBiasDisabled
// can't test value - is indeterminate without external bias.
testChipBiasOption(t, gpiocdev.WithBiasDisabled, bias, -1)
testLineBiasOption(t, gpiocdev.WithBiasDisabled, bias, -1)
testLineBiasReconfigure(t, gpiocdev.WithPullDown, gpiocdev.WithBiasDisabled, bias, -1)
}
func TestWithBiasAsIs(t *testing.T) {
requireKernel(t, uapiV2Kernel)
offsets := []int{1, 2, 3, 4, 5}
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath(), gpiocdev.WithConsumer("TestWithBiasAsIs"))
defer c.Close()
requireABI(t, c, 2)
l, err := c.RequestLines(offsets,
gpiocdev.AsInput,
gpiocdev.WithPullDown,
gpiocdev.WithLines(
[]int{offsets[2], offsets[4]},
gpiocdev.WithBiasAsIs,
),
)
assert.Nil(t, err)
require.NotNil(t, l)
xinf := gpiocdev.LineInfo{
Used: true,
Consumer: "TestWithBiasAsIs",
Offset: offsets[0],
Config: gpiocdev.LineConfig{
Bias: gpiocdev.LineBiasPullDown,
Direction: gpiocdev.LineDirectionInput,
},
}
inf, err := c.LineInfo(offsets[0])
assert.Nil(t, err)
assert.Equal(t, xinf, inf)
inf, err = c.LineInfo(offsets[2])
assert.Nil(t, err)
xinf.Offset = offsets[2]
xinf.Config.Bias = gpiocdev.LineBiasUnknown
assert.Equal(t, xinf, inf)
l.Close()
}
func TestWithPullDown(t *testing.T) {
bias := gpiocdev.LineBiasPullDown
testChipBiasOption(t, gpiocdev.WithPullDown, bias, 0)
testLineBiasOption(t, gpiocdev.WithPullDown, bias, 0)
testLineBiasReconfigure(t, gpiocdev.WithPullUp, gpiocdev.WithPullDown, bias, 0)
}
func TestWithPullUp(t *testing.T) {
bias := gpiocdev.LineBiasPullUp
testChipBiasOption(t, gpiocdev.WithPullUp, bias, 1)
testLineBiasOption(t, gpiocdev.WithPullUp, bias, 1)
testLineBiasReconfigure(t, gpiocdev.WithPullDown, gpiocdev.WithPullUp, bias, 1)
}
var evtSeqno uint32
type AbiVersioner interface {
UapiAbiVersion() int
}
func nextEvent(r AbiVersioner, active int) gpiocdev.LineEvent {
if r.UapiAbiVersion() != 1 {
evtSeqno++
}
typ := gpiocdev.LineEventFallingEdge
if active != 0 {
typ = gpiocdev.LineEventRisingEdge
}
return gpiocdev.LineEvent{
Type: typ,
Seqno: evtSeqno,
LineSeqno: evtSeqno,
}
}
func TestWithEventHandler(t *testing.T) {
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 0)
// via chip options
ich := make(chan gpiocdev.LineEvent, 3)
eh := func(evt gpiocdev.LineEvent) {
ich <- evt
}
chipOpts := []gpiocdev.ChipOption{gpiocdev.WithEventHandler(eh)}
if kernelAbiVersion != 0 {
chipOpts = append(chipOpts, gpiocdev.ABIVersionOption(kernelAbiVersion))
}
c := getChip(t, s.DevPath(), chipOpts...)
defer c.Close()
r, err := c.RequestLine(offset, gpiocdev.WithBothEdges)
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
waitNoEvent(t, ich)
r.Close()
// via line options
ich2 := make(chan gpiocdev.LineEvent, 3)
eh2 := func(evt gpiocdev.LineEvent) {
ich2 <- evt
}
r, err = c.RequestLine(offset,
gpiocdev.WithBothEdges,
gpiocdev.WithEventHandler(eh2))
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich2)
s.SetPull(offset, 1)
waitEvent(t, ich2, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich2, nextEvent(r, 0))
s.SetPull(offset, 1)
waitEvent(t, ich2, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich2, nextEvent(r, 0))
waitNoEvent(t, ich2)
r.Close()
// stub out inherited event handler
r, err = c.RequestLine(offset,
gpiocdev.WithEventHandler(nil))
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitNoEvent(t, ich)
s.SetPull(offset, 0)
waitNoEvent(t, ich)
}
func TestWithFallingEdge(t *testing.T) {
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 1)
c := getChip(t, s.DevPath())
defer c.Close()
ich := make(chan gpiocdev.LineEvent, 3)
r, err := c.RequestLine(offset,
gpiocdev.WithFallingEdge,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
ich <- evt
}))
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich)
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
s.SetPull(offset, 1)
waitNoEvent(t, ich)
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
s.SetPull(offset, 1)
waitNoEvent(t, ich)
}
func TestWithRisingEdge(t *testing.T) {
offset := 4
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 0)
c := getChip(t, s.DevPath())
defer c.Close()
ich := make(chan gpiocdev.LineEvent, 3)
r, err := c.RequestLine(offset,
gpiocdev.WithRisingEdge,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
ich <- evt
}))
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitNoEvent(t, ich)
}
func TestWithBothEdges(t *testing.T) {
offsets := []int{4, 3, 2, 1}
offset := offsets[1]
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 0)
c := getChip(t, s.DevPath())
defer c.Close()
ich := make(chan gpiocdev.LineEvent, 3)
r, err := c.RequestLines(offsets,
gpiocdev.WithBothEdges,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
ich <- evt
}))
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
waitNoEvent(t, ich)
}
func TestWithoutEdges(t *testing.T) {
offsets := []int{4, 3, 2, 1}
offset := offsets[1]
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 0)
c := getChip(t, s.DevPath())
defer c.Close()
ich := make(chan gpiocdev.LineEvent, 3)
r, err := c.RequestLines(offsets,
gpiocdev.WithBothEdges,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
ich <- evt
}))
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
err = r.Reconfigure(gpiocdev.WithoutEdges)
if c.UapiAbiVersion() == 1 {
// uapi v2 required for edge reconfiguration
assert.Equal(t, unix.EINVAL, err)
return
}
require.Nil(t, err)
waitNoEvent(t, ich)
s.SetPull(offset, 1)
waitNoEvent(t, ich)
s.SetPull(offset, 0)
waitNoEvent(t, ich)
}
func TestWithRealtimeEventClock(t *testing.T) {
offsets := []int{4, 3, 2, 1}
offset := offsets[1]
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 0)
c := getChip(t, s.DevPath())
defer c.Close()
var evtTimestamp time.Duration
ich := make(chan gpiocdev.LineEvent, 3)
r, err := c.RequestLines(offsets,
gpiocdev.WithBothEdges,
gpiocdev.WithRealtimeEventClock,
gpiocdev.WithEventHandler(func(evt gpiocdev.LineEvent) {
evtTimestamp = evt.Timestamp
ich <- evt
}))
if c.UapiAbiVersion() == 1 {
// uapi v2 required for event clock option
assert.Equal(t, gpiocdev.ErrUapiIncompatibility{Feature: "event clock", AbiVersion: 1}, err)
assert.Nil(t, r)
return
}
if uapi.CheckKernelVersion(eventClockRealtimeKernel) != nil {
// old kernels should reject the realtime request
assert.Equal(t, unix.EINVAL, err)
assert.Nil(t, r)
if r != nil {
r.Close()
}
return
}
require.Nil(t, err)
require.NotNil(t, r)
defer r.Close()
evtSeqno = 0
waitNoEvent(t, ich)
start := time.Now()
s.SetPull(offset, 1)
waitEvent(t, ich, nextEvent(r, 1))
end := time.Now()
// with time converted to nanoseconds duration
assert.LessOrEqual(t, start.UnixNano(), evtTimestamp.Nanoseconds())
assert.GreaterOrEqual(t, end.UnixNano(), evtTimestamp.Nanoseconds())
// with timestamp converted to time
evtTime := time.Date(1970, time.January, 1, 0, 0, 0, 0, time.UTC).Add(evtTimestamp)
assert.False(t, evtTime.Before(start))
assert.False(t, evtTime.After(end))
start = time.Now()
s.SetPull(offset, 0)
waitEvent(t, ich, nextEvent(r, 0))
end = time.Now()
assert.LessOrEqual(t, start.UnixNano(), evtTimestamp.Nanoseconds())
assert.GreaterOrEqual(t, end.UnixNano(), evtTimestamp.Nanoseconds())
evtTime = time.Date(1970, time.January, 1, 0, 0, 0, 0, time.UTC).Add(evtTimestamp)
assert.False(t, evtTime.Before(start))
assert.False(t, evtTime.After(end))
}
func waitEvent(t *testing.T, ch <-chan gpiocdev.LineEvent, xevt gpiocdev.LineEvent) {
t.Helper()
select {
case evt := <-ch:
assert.Equal(t, xevt.Type, evt.Type)
assert.Equal(t, xevt.Seqno, evt.Seqno)
assert.Equal(t, xevt.LineSeqno, evt.LineSeqno)
case <-time.After(time.Second):
assert.Fail(t, "timeout waiting for event")
}
}
func waitNoEvent(t *testing.T, ch <-chan gpiocdev.LineEvent) {
t.Helper()
select {
case evt := <-ch:
assert.Fail(t, "received unexpected event", evt)
case <-time.After(20 * time.Millisecond):
}
}
func clearEvents(ch <-chan gpiocdev.LineEvent) uint32 {
var seqno uint32
select {
case evt := <-ch:
seqno = evt.Seqno
case <-time.After(20 * time.Millisecond):
}
return seqno
}
func TestWithDebounce(t *testing.T) {
requireKernel(t, uapiV2Kernel)
offset := 1
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
c := getChip(t, s.DevPath())
defer c.Close()
l, err := c.RequestLine(offset,
gpiocdev.WithDebounce(10*time.Microsecond))
if c.UapiAbiVersion() == 1 {
xerr := gpiocdev.ErrUapiIncompatibility{"debounce", 1}
assert.Equal(t, xerr, err)
assert.Nil(t, l)
return
}
require.Nil(t, err)
require.NotNil(t, l)
defer l.Close()
inf, err := c.LineInfo(offset)
assert.Nil(t, err)
assert.Equal(t, gpiocdev.LineDirectionInput, inf.Config.Direction)
assert.True(t, inf.Config.Debounced)
assert.Equal(t, 10*time.Microsecond, inf.Config.DebouncePeriod)
}
func TestWithLines(t *testing.T) {
requireKernel(t, uapiV2Kernel)
offsets := []int{4, 3, 2, 1, 0}
offset := offsets[1]
s, err := gpiosim.NewSimpleton(6)
require.Nil(t, err)
defer s.Close()
s.SetPull(offset, 0)
c := getChip(t, s.DevPath(), gpiocdev.WithConsumer("TestWithLines"))
defer c.Close()
requireABI(t, c, 2)