mdb

package
v0.220709.0 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jul 9, 2022 License: CC0-1.0 Imports: 18 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	DefaultDelayAfterReset  = 500 * time.Millisecond
	DefaultDelayBeforeReset = 0
	DefaultDelayIdle        = 700 * time.Millisecond
	DefaultDelayNext        = 200 * time.Millisecond
	DefaultDelayOffline     = 10 * time.Second
	DefaultIdleThreshold    = 30 * time.Second
)
View Source 
const (
	DefaultBusResetKeep  = 200 * time.Millisecond
	DefaultBusResetSleep = 500 * time.Millisecond
)
View Source 
const ErrCodeNone int32 = -1
View Source 
const MockContextKey = "test/mdb-mock"
View Source 
const MockTimeout = 5 * time.Second
View Source 
const (
	PacketMaxLength = 40
)

Variables

View Source 
var (
	ErrStateInvalid = fmt.Errorf("CRITICAL code error state=invalid")
	ErrStateError   = fmt.Errorf("state=error")
)
View Source 
var (
	ErrNak     = fmt.Errorf("MDB NAK")
	ErrBusy    = fmt.Errorf("MDB busy")
	ErrTimeout = fmt.Errorf("MDB timeout")
)
View Source 
var (
	ErrPacketOverflow = errors.New("mdb: operation larger than max packet size")
	ErrPacketReadonly = errors.New("mdb: packet is readonly")

	PacketEmpty = &Packet{readonly: true}
	PacketAck   = MustPacketFromHex("00", true)
	PacketNak   = MustPacketFromHex("ff", true)
	PacketRet   = MustPacketFromHex("aa", true)
)

Functions

func IsResponseTimeout 

func IsResponseTimeout(e error) bool

func NewMockBus 

func NewMockBus(t testing.TB) (*Bus, *MockUart)

Types

type Bus 

type Bus struct {
	Error func(error)
	Log   *log2.Log
	// contains filtered or unexported fields
}

func NewBus 

func NewBus(u Uarter, log *log2.Log, errfun func(error)) *Bus

func (*Bus) Reset 

func (b *Bus) Reset(keep, sleep time.Duration) error

func (*Bus) ResetDefault 

func (b *Bus) ResetDefault() error

func (*Bus) Tx 

func (b *Bus) Tx(request Packet, response *Packet) error

type Device 

type Device struct {
	LastOk  *atomic_clock.Clock // last successful tx(), 0 at init, monotonic
	LastOff *atomic_clock.Clock // last change from online to offline (MDB timeout), 0=online

	Log     *log2.Log
	Address uint8

	ByteOrder   binary.ByteOrder
	PacketReset Packet
	PacketSetup Packet
	PacketPoll  Packet
	DoReset     engine.Doer
	DoInit      engine.Doer // likely Seq starting with DoReset

	DelayAfterReset  time.Duration
	DelayBeforeReset time.Duration
	DelayIdle        time.Duration
	DelayNext        time.Duration
	DelayOffline     time.Duration
	IdleThreshold    time.Duration

	SetupResponse Packet
	// contains filtered or unexported fields
}

func (*Device) ErrorCode 

func (dev *Device) ErrorCode() int32

func (*Device) Init 

func (dev *Device) Init(bus *Bus, addr uint8, name string, byteOrder binary.ByteOrder)

func (*Device) Keepalive 

func (dev *Device) Keepalive(interval time.Duration, stopch <-chan struct{})

Keep particular devices "hot" to reduce useless POLL time.

func (*Device) Locked_TxKnown 

func (dev *Device) Locked_TxKnown(request Packet, response *Packet) error

Please make sure it is called under cmdLk or don't use it.

func (*Device) Name 

func (dev *Device) Name() string

func (*Device) NewFunLoop 

func (dev *Device) NewFunLoop(tag string, fun PollFunc, timeout time.Duration) engine.Doer

Call `fun` until `timeout` or it returns stop=true or error.

func (*Device) NewPollLoop 

func (dev *Device) NewPollLoop(tag string, request Packet, timeout time.Duration, fun PollRequestFunc) engine.Doer

Send `request` packets until `timeout` or `fun` returns stop=true or error.

func (*Device) Ready 

func (dev *Device) Ready() bool

func (*Device) Reset 

func (dev *Device) Reset() error

func (*Device) SetError 

func (dev *Device) SetError(e error)

func (*Device) SetOnline 

func (dev *Device) SetOnline()

func (*Device) SetReady 

func (dev *Device) SetReady()

func (*Device) SetState 

func (dev *Device) SetState(new DeviceState)

func (*Device) State 

func (dev *Device) State() DeviceState

func (*Device) TeleError 

func (dev *Device) TeleError(e error)

func (*Device) TxCustom 

func (dev *Device) TxCustom(request Packet, response *Packet, opt TxOpt) error

func (*Device) TxKnown 

func (dev *Device) TxKnown(request Packet, response *Packet) error

Command is known to be supported, MDB timeout means remote is offline. RESET if appropriate.

func (*Device) TxMaybe 

func (dev *Device) TxMaybe(request Packet, response *Packet) error

Remote may ignore command with MDB timeout. state=Offline -> RESET state.Ok() required

func (*Device) TxSetup 

func (dev *Device) TxSetup() error

func (*Device) ValidateErrorCode 

func (dev *Device) ValidateErrorCode() error

func (*Device) ValidateOnline 

func (dev *Device) ValidateOnline() error

func (*Device) XXX_FIXME_SetAllDelays 

func (dev *Device) XXX_FIXME_SetAllDelays(d time.Duration)

Used by tests to avoid waiting.

type DeviceState 

type DeviceState uint32
const (
	DeviceInvalid DeviceState = iota // new, not usable
	DeviceInited                     // after Init(), usable for Probe
	DeviceOnline                     // Probe success, calibration may be required
	DeviceReady                      // "ready for useful work", with RESET, configure, calibration done
	DeviceError                      // responds but doesn't work well
	DeviceOffline                    // does not respond
)

func (DeviceState) Ok 

func (s DeviceState) Ok() bool

func (DeviceState) Online 

func (s DeviceState) Online() bool

func (DeviceState) String 

func (i DeviceState) String() string

type FeatureNotSupported 

type FeatureNotSupported string

func (FeatureNotSupported) Error 

func (fns FeatureNotSupported) Error() string

type InvalidChecksum 

type InvalidChecksum struct {
	Received byte
	Actual   byte
}

func (InvalidChecksum) Error 

func (ic InvalidChecksum) Error() string

type MockR 

type MockR [2]string

func (MockR) String 

func (m MockR) String() string

type MockUart 

type MockUart struct {
	// contains filtered or unexported fields
}

func MockFromContext 

func MockFromContext(ctx context.Context) *MockUart

sorry for this ugly convolution working around import cycle on a time budget

func NewMockUart 

func NewMockUart(t testing.TB) *MockUart

func (*MockUart) Break 

func (mu *MockUart) Break(d, sleep time.Duration) error

func (*MockUart) Close 

func (mu *MockUart) Close() error

func (*MockUart) Expect 

func (mu *MockUart) Expect(rrs []MockR)

usage: m, mock:= NewTestMdber(t) defer mock.Close() go use_mdb(m) mock.Expect(...) go use_mdb(m) mock.Expect(...) wait use_mdb() to finish to catch all possible errors

func (*MockUart) ExpectMap 

func (mu *MockUart) ExpectMap(rrs map[string]string)

func (*MockUart) Open 

func (mu *MockUart) Open(path string) error

func (*MockUart) Tx 

func (mu *MockUart) Tx(request, response []byte) (n int, err error)

type Packet 

type Packet struct {
	// contains filtered or unexported fields
}

func MustPacketFromBytes 

func MustPacketFromBytes(b []byte, readonly bool) Packet

func MustPacketFromHex 

func MustPacketFromHex(s string, readonly bool) Packet

func PacketFromBytes 

func PacketFromBytes(b []byte, readonly bool) (Packet, error)

func PacketFromHex 

func PacketFromHex(s string, readonly bool) (Packet, error)

func (*Packet) Bytes 

func (p *Packet) Bytes() []byte

func (*Packet) Equal 

func (p *Packet) Equal(p2 *Packet) bool

func (*Packet) Format 

func (p *Packet) Format() string

func (*Packet) Len 

func (p *Packet) Len() int

func (*Packet) TestHex 

func (p *Packet) TestHex(t testing.TB, expect string)

Without checksum

func (*Packet) Wire 

func (p *Packet) Wire(ffDance bool) []byte

func (*Packet) Write 

func (sp *Packet) Write(p []byte) (n int, err error)

type PollDelay 

type PollDelay struct {
	// contains filtered or unexported fields
}

"Idle mode" polling, runs forever until receive on `stopch`. Switches between fast/idle delays. Used by bill/coin devices.

func (*PollDelay) Delay 

func (pd *PollDelay) Delay(dev *Device, active bool, err bool, stopch <-chan struct{}) bool

type PollFunc 

type PollFunc func() (stop bool, err error)

type PollRequestFunc 

type PollRequestFunc func(Packet) (stop bool, err error)

type TxOpt 

type TxOpt struct {
	TimeoutOffline bool
	RequireOK      bool
	NoReset        bool
	ResetError     bool
	ResetOffline   bool
}

type Uarter 

type Uarter interface {
	Break(d, sleep time.Duration) error
	Close() error
	Open(options string) error
	Tx(request, response []byte) (int, error)
}

Source Files

View all Source files

Directories

Path Synopsis
Package bill incapsulates work with bill validators.
 Package bill incapsulates work with bill validators.
Separate package to for hardware/mdb related config structure.
 Separate package to for hardware/mdb related config structure.
Package evend incapsulates common parts of MDB protocol for eVend machine devices like conveyor, hopper, cup dispenser, elevator, etc.
 Package evend incapsulates common parts of MDB protocol for eVend machine devices like conveyor, hopper, cup dispenser, elevator, etc.
config
Separate package to for hardware/evend related config structure.
 Separate package to for hardware/evend related config structure.

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