first commit

.gitignore

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+/.idea

.vscode/settings.json

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+{
+  "editor.formatOnSave": true,
+  "editor.codeActionsOnSave": {
+    "source.fixAll": true
+  }
+}

LICENSE

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+Copyright 2021 Septs
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# CH912x
+
+> The program provides CH912x series chip configuration tools
+
+## Supported
+
+| Chip Name | Status |
+| --------- | ------ |
+| CH9120    | TESTED |
+| CH9121    | TESTED |
+| CH9126    | TESTED |
+
+## Command line
+
+- [cmd/ch912x-api](cmd/ch912x-api)
+
+  Provide a simple web-oriented API.
+
+## References
+
+- [docs](docs)
+
+## LICENSE
+
+[MIT LICENSE](LICENSE), but not include [docs](docs) folder

ch9120.go

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+package ch912x
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/binary"
+	"encoding/json"
+	"io"
+	"net"
+	"strconv"
+)
+
+type CH9120 struct {
+	Kind          Kind             `json:"-"`
+	Version       string           `json:"version,omitempty"`
+	ModuleName    string           `json:"module_name,omitempty"`
+	ModuleMAC     net.HardwareAddr `json:"module_mac,omitempty"`
+	ClientMAC     net.HardwareAddr `json:"client_mac,omitempty"`
+	ModuleOptions *ModuleOptions   `json:"module_options,omitempty"`
+	UART1         *UARTService     `json:"uart_1,omitempty"`
+}
+
+func (p *CH9120) setClientMAC(addr net.HardwareAddr) {
+	p.ClientMAC = addr
+}
+
+func (p *CH9120) identity() (Kind, net.HardwareAddr) {
+	return p.Kind, p.ModuleMAC
+}
+
+func (p *CH9120) moduleIP() net.IP {
+	if p.ModuleOptions == nil {
+		return nil
+	}
+	return p.ModuleOptions.IP
+}
+
+func (p *CH9120) MarshalJSON() ([]byte, error) {
+	type Module CH9120
+	module := new(struct {
+		Product Product `json:"product"`
+		*Module
+	})
+	module.Product = ProductCH9120
+	module.Module = (*Module)(p)
+	return json.Marshal(module)
+}
+
+func (p *CH9120) UnmarshalJSON(data []byte) (err error) {
+	type Module CH9120
+	module := new(struct {
+		Product Product `json:"product"`
+		*Module
+	})
+	module.Module = (*Module)(p)
+	err = json.Unmarshal(data, module)
+	if err == nil && module.Product != ProductCH9120 {
+		err = ErrCH9120InvalidJSON
+	}
+	return
+}
+
+func (p *CH9120) ReadFrom(r io.Reader) (n int64, err error) {
+	header := new(ch9121Header)
+	err = binary.Read(r, binary.LittleEndian, header)
+	if err != nil {
+		return
+	}
+	p.Kind = header.Kind
+	if p.Kind == KindDiscoveryResponse {
+		discovery := new(ch9121Discovery)
+		err = binary.Read(r, binary.LittleEndian, discovery)
+		p.ModuleMAC = discovery.ModuleMAC[:]
+		p.ClientMAC = discovery.ClientMAC[:]
+		p.ModuleOptions = &ModuleOptions{IP: discovery.IP[:]}
+		buf := bufio.NewReader(r)
+		moduleName, _ := buf.ReadBytes(0)
+		p.ModuleName = trimNull(moduleName)
+		version, _ := buf.ReadByte()
+		p.Version = strconv.Itoa(int(version))
+		return
+	}
+	c := new(ch9120Configuration)
+	err = binary.Read(r, binary.LittleEndian, c)
+	if err != nil {
+		return
+	}
+	p.ModuleName = trimNull(c.ModuleName[:])
+	p.ModuleMAC = c.ModuleMAC[:]
+	p.ClientMAC = c.ClientMAC[:]
+	p.ModuleOptions = &ModuleOptions{
+		MAC:             c.ModuleOptions.ModuleMAC[:],
+		IP:              c.ModuleOptions.IP[:],
+		Mask:            c.ModuleOptions.Mask[:],
+		Gateway:         c.ModuleOptions.Gateway[:],
+		UseDHCP:         fromVariantBool(c.ModuleOptions.DHCP),
+		SerialNegotiate: fromVariantBool(c.ModuleOptions.SerialNegotiate),
+	}
+	p.UART1 = &UARTService{
+		Mode:             UARTMode(c.UART.Mode),
+		ClientIP:         c.UART.ClientIP[:],
+		ClientPort:       c.UART.ClientPort,
+		LocalPort:        c.UART.TargetPort,
+		PacketSize:       c.UART.RXSize,
+		PacketTimeout:    c.UART.RXTimeout,
+		RandomClientPort: fromVariantBool(c.UART.RandomClientPort),
+		CloseOnLost:      fromVariantBool(c.UART.CloseOnLost),
+		ClearOnReconnect: fromVariantBool(c.UART.ClearOnTimeout),
+		Baud:             c.UART.Baud,
+		DataBits:         c.UART.DataBits,
+		StopBit:          c.UART.StopBit,
+		Parity:           fromCH9121Parity(c.UART.Parity),
+		UseDomain:        fromVariantBool(c.UART.UseDomain),
+		ClientDomain:     trimNull(c.UART.ClientDomain[:]),
+	}
+	return
+}
+
+func (p *CH9120) WriteTo(w io.Writer) (n int64, err error) {
+	var buf bytes.Buffer
+	h := &ch9121Header{Kind: p.Kind}
+	copy(h.Header[:], magicCH9120)
+	_ = binary.Write(&buf, binary.LittleEndian, h)
+	r := new(ch9120Configuration)
+	copy(r.ModuleMAC[:], p.ModuleMAC)
+	copy(r.ClientMAC[:], p.ClientMAC)
+	copy(r.ModuleName[:], p.ModuleName)
+	if opt := p.ModuleOptions; opt != nil {
+		copy(r.ModuleOptions.ModuleMAC[:], opt.MAC)
+		copy(r.ModuleOptions.IP[:], opt.IP)
+		copy(r.ModuleOptions.Mask[:], opt.Mask)
+		copy(r.ModuleOptions.Gateway[:], opt.Gateway)
+		r.ModuleOptions.DHCP = toVariantBool(opt.UseDHCP)
+		r.ModuleOptions.SerialNegotiate = toVariantBool(opt.SerialNegotiate)
+	}
+	if p.UART1 != nil {
+		r.UART = ch9120UART{
+			Mode:             byte(p.UART1.Mode),
+			RandomClientPort: toVariantBool(p.UART1.RandomClientPort),
+			ClientPort:       p.UART1.ClientPort,
+			TargetPort:       p.UART1.LocalPort,
+			Baud:             p.UART1.Baud,
+			DataBits:         p.UART1.DataBits,
+			StopBit:          p.UART1.StopBit,
+			Parity:           toCH9121Parity(p.UART1.Parity),
+			CloseOnLost:      toVariantBool(p.UART1.CloseOnLost),
+			RXSize:           p.UART1.PacketSize,
+			RXTimeout:        p.UART1.PacketTimeout,
+			ClearOnTimeout:   toVariantBool(p.UART1.ClearOnReconnect),
+		}
+		copy(r.UART.ClientIP[:], p.UART1.ClientIP)
+		r.UART.UseDomain = toVariantBool(p.UART1.UseDomain)
+		copy(r.UART.ClientDomain[:], p.UART1.ClientDomain)
+	}
+	_ = binary.Write(&buf, binary.LittleEndian, r)
+	_, _ = buf.Write(make([]byte, 285-buf.Len()))
+	return buf.WriteTo(w)
+}
+
+type ch9120Configuration struct {
+	ModuleMAC     [6]byte
+	ClientMAC     [6]byte
+	_             [6]byte
+	ModuleName    [21]byte
+	ModuleOptions ch9121ModuleOptions
+	_             [75]byte
+	UART          ch9120UART
+}
+
+type ch9120UART struct {
+	Mode             byte
+	RandomClientPort byte
+	ClientPort       uint16
+	ClientIP         [4]byte
+	TargetPort       uint16
+	Baud             uint32
+	DataBits         byte
+	StopBit          byte
+	Parity           byte // None, Evan, Odd, Mark, Space
+	CloseOnLost      byte
+	RXSize           uint16
+	_                [2]byte
+	RXTimeout        uint16
+	_                [3]byte
+	ClearOnTimeout   byte
+	UseDomain        byte
+	ClientDomain     [20]byte
+}