368 lines
7.6 KiB
Go
368 lines
7.6 KiB
Go
package message
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//数据帧(0x80+扩展类型),一个CAN帧只能存储8个字节,对于一个应答器报文,分片到多个CAN数据帧中
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// BtmDataMessageFrame 数据帧-应答器报文
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// offset = [0x00,0x0c] 共13个即可用于存储应答器报文的共104个字节
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type BtmDataMessageFrame struct {
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//帧ID
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FId CanFrameId
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//8字节,应答器报文片段
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Message []byte
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}
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func NewBtmDataMessageFrame(sn byte, offset byte) *BtmDataMessageFrame {
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return &BtmDataMessageFrame{
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FId: *NewCanFrameId(CAN_ADDR_RSP_ATP, CAN_ADDR_RSP_BTM, 0x80+offset, sn),
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}
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}
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func (f *BtmDataMessageFrame) Encode() *CanetFrame {
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cf := &CanetFrame{}
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cf.CanId = f.FId
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cf.CanLen = 8
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cf.FF = true
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cf.RTR = false
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//
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writer := NewCanBitsWriter(8)
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//
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for _, data := range f.Message {
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writer.AddByte(data)
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}
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cf.CanData = writer.(CanBusData).GetData()
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//
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return cf
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}
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func (f *BtmDataMessageFrame) Decode(cf *CanetFrame) bool {
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f.FId = cf.CanId
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//
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reader := NewCanBitsReader(cf.CanData, 8)
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//
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f.Message = make([]byte, 0, 8)
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for c := 0; c < 8; c++ {
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data, ok := reader.ReadByte()
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if !ok {
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return false
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}
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f.Message = append(f.Message, data)
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}
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//
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return true
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}
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/////////////////////////////////////////////////////
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// BtmDataMessageTimeAFrame 数据帧-时间戳A
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// offset = 0x0d
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type BtmDataMessageTimeAFrame struct {
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//帧ID
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FId CanFrameId
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//时间戳A
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TimeA uint32
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//CRC
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Crc32A uint32
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}
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func NewBtmDataMessageTimeAFrame(sn byte) *BtmDataMessageTimeAFrame {
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return &BtmDataMessageTimeAFrame{
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FId: *NewCanFrameId(CAN_ADDR_RSP_ATP, CAN_ADDR_RSP_BTM, 0x80+0x0d, sn),
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}
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}
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func (f *BtmDataMessageTimeAFrame) Encode() *CanetFrame {
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cf := &CanetFrame{}
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cf.CanId = f.FId
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cf.CanLen = 8
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cf.FF = true
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cf.RTR = false
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//
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writer := NewCanBitsWriter(8)
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//
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byteMsk := uint32(0x00_00_00_ff)
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//
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writer.AddByte(byte((f.TimeA >> 24) & byteMsk))
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writer.AddByte(byte((f.TimeA >> 16) & byteMsk))
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writer.AddByte(byte((f.TimeA >> 8) & byteMsk))
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writer.AddByte(byte(f.TimeA & byteMsk))
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//
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writer.AddByte(byte((f.Crc32A >> 24) & byteMsk))
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writer.AddByte(byte((f.Crc32A >> 16) & byteMsk))
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writer.AddByte(byte((f.Crc32A >> 8) & byteMsk))
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writer.AddByte(byte(f.Crc32A & byteMsk))
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//
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cf.CanData = writer.(CanBusData).GetData()
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//
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return cf
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}
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func (f *BtmDataMessageTimeAFrame) Decode(cf *CanetFrame) bool {
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f.FId = cf.CanId
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//
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reader := NewCanBitsReader(cf.CanData, 8)
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//
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f.TimeA = 0
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a1, a1Ok := reader.ReadByte()
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if !a1Ok {
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return false
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}
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f.TimeA |= uint32(a1) << 24
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//
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a2, a2Ok := reader.ReadByte()
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if !a2Ok {
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return false
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}
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f.TimeA |= uint32(a2) << 16
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//
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a3, a3Ok := reader.ReadByte()
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if !a3Ok {
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return false
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}
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f.TimeA |= uint32(a3) << 8
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//
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a4, a4Ok := reader.ReadByte()
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if !a4Ok {
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return false
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}
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f.TimeA |= uint32(a4)
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//
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f.Crc32A = 0
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c1, c1Ok := reader.ReadByte()
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if !c1Ok {
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return false
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}
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f.Crc32A |= uint32(c1) << 24
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//
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c2, c2Ok := reader.ReadByte()
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if !c2Ok {
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return false
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}
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f.Crc32A |= uint32(c2) << 16
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//
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c3, c3Ok := reader.ReadByte()
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if !c3Ok {
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return false
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}
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f.Crc32A |= uint32(c3) << 8
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//
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c4, c4Ok := reader.ReadByte()
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if !c4Ok {
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return false
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}
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f.Crc32A |= uint32(c4)
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//
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return true
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}
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//////////////////////////////////////////////////////////
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// BtmDataMessageTimeBFrame 数据帧-时间戳B
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// offset = 0x0e
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type BtmDataMessageTimeBFrame struct {
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//帧ID
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FId CanFrameId
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//时间戳B
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TimeB uint32
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//CRC
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Crc32B uint32
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}
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func NewBtmDataMessageTimeBFrame(sn byte) *BtmDataMessageTimeBFrame {
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return &BtmDataMessageTimeBFrame{
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FId: *NewCanFrameId(CAN_ADDR_RSP_ATP, CAN_ADDR_RSP_BTM, 0x80+0x0e, sn),
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}
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}
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func (f *BtmDataMessageTimeBFrame) Encode() *CanetFrame {
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cf := &CanetFrame{}
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cf.CanId = f.FId
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cf.CanLen = 8
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cf.FF = true
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cf.RTR = false
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//
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writer := NewCanBitsWriter(8)
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//
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byteMsk := uint32(0x00_00_00_ff)
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//
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writer.AddByte(byte((f.TimeB >> 24) & byteMsk))
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writer.AddByte(byte((f.TimeB >> 16) & byteMsk))
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writer.AddByte(byte((f.TimeB >> 8) & byteMsk))
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writer.AddByte(byte(f.TimeB & byteMsk))
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//
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writer.AddByte(byte((f.Crc32B >> 24) & byteMsk))
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writer.AddByte(byte((f.Crc32B >> 16) & byteMsk))
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writer.AddByte(byte((f.Crc32B >> 8) & byteMsk))
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writer.AddByte(byte(f.Crc32B & byteMsk))
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//
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cf.CanData = writer.(CanBusData).GetData()
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//
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return cf
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}
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func (f *BtmDataMessageTimeBFrame) Decode(cf *CanetFrame) bool {
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f.FId = cf.CanId
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//
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reader := NewCanBitsReader(cf.CanData, 8)
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//
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f.TimeB = 0
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a1, a1Ok := reader.ReadByte()
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if !a1Ok {
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return false
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}
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f.TimeB |= uint32(a1) << 24
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//
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a2, a2Ok := reader.ReadByte()
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if !a2Ok {
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return false
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}
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f.TimeB |= uint32(a2) << 16
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//
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a3, a3Ok := reader.ReadByte()
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if !a3Ok {
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return false
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}
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f.TimeB |= uint32(a3) << 8
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//
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a4, a4Ok := reader.ReadByte()
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if !a4Ok {
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return false
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}
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f.TimeB |= uint32(a4)
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//
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f.Crc32B = 0
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c1, c1Ok := reader.ReadByte()
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if !c1Ok {
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return false
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}
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f.Crc32B |= uint32(c1) << 24
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//
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c2, c2Ok := reader.ReadByte()
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if !c2Ok {
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return false
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}
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f.Crc32B |= uint32(c2) << 16
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//
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c3, c3Ok := reader.ReadByte()
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if !c3Ok {
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return false
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}
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f.Crc32B |= uint32(c3) << 8
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//
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c4, c4Ok := reader.ReadByte()
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if !c4Ok {
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return false
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}
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f.Crc32B |= uint32(c4)
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//
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return true
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}
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////////////////////////////////////////////////////////////
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// BtmDataMessageEndFrame 数据帧-结束
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// offset = 0x7f
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type BtmDataMessageEndFrame struct {
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//帧ID
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FId CanFrameId
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//TK time B
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TkB uint32
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//CRC32C校验包含对状态应答帧与数据帧的总校验,总共为8×17-4=132字节,4-即Crc32C
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//1个状态应答帧 + 13个BtmDataMessageFrame + 1个BtmDataMessageTimeAFrame + 1个BtmDataMessageTimeBFrame + 1个BtmDataMessageEndFrame
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Crc32C uint32
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}
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func NewBtmDataMessageEndFrame(sn byte) *BtmDataMessageEndFrame {
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return &BtmDataMessageEndFrame{
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FId: *NewCanFrameId(CAN_ADDR_RSP_ATP, CAN_ADDR_RSP_BTM, 0x80+0x7f, sn),
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}
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}
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func (f *BtmDataMessageEndFrame) Encode() *CanetFrame {
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cf := &CanetFrame{}
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cf.CanId = f.FId
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cf.CanLen = 8
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cf.FF = true
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cf.RTR = false
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//
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writer := NewCanBitsWriter(8)
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//
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byteMsk := uint32(0x00_00_00_ff)
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//
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writer.AddByte(byte((f.TkB >> 24) & byteMsk))
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writer.AddByte(byte((f.TkB >> 16) & byteMsk))
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writer.AddByte(byte((f.TkB >> 8) & byteMsk))
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writer.AddByte(byte(f.TkB & byteMsk))
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//
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writer.AddByte(byte((f.Crc32C >> 24) & byteMsk))
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writer.AddByte(byte((f.Crc32C >> 16) & byteMsk))
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writer.AddByte(byte((f.Crc32C >> 8) & byteMsk))
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writer.AddByte(byte(f.Crc32C & byteMsk))
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//
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cf.CanData = writer.(CanBusData).GetData()
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//
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return cf
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}
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func (f *BtmDataMessageEndFrame) Decode(cf *CanetFrame) bool {
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f.FId = cf.CanId
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//
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reader := NewCanBitsReader(cf.CanData, 8)
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//
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f.TkB = 0
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a1, a1Ok := reader.ReadByte()
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if !a1Ok {
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return false
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}
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f.TkB |= uint32(a1) << 24
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//
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a2, a2Ok := reader.ReadByte()
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if !a2Ok {
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return false
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}
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f.TkB |= uint32(a2) << 16
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//
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a3, a3Ok := reader.ReadByte()
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if !a3Ok {
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return false
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}
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f.TkB |= uint32(a3) << 8
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//
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a4, a4Ok := reader.ReadByte()
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if !a4Ok {
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return false
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}
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f.TkB |= uint32(a4)
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//
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f.Crc32C = 0
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c1, c1Ok := reader.ReadByte()
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if !c1Ok {
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return false
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}
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f.Crc32C |= uint32(c1) << 24
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//
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c2, c2Ok := reader.ReadByte()
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if !c2Ok {
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return false
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}
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f.Crc32C |= uint32(c2) << 16
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//
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c3, c3Ok := reader.ReadByte()
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if !c3Ok {
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return false
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}
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f.Crc32C |= uint32(c3) << 8
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//
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c4, c4Ok := reader.ReadByte()
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if !c4Ok {
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return false
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}
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f.Crc32C |= uint32(c4)
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//
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return true
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}
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// 32位时间戳,转换成字节数组
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// 大端模型
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func canTimeToBytes(ts uint32) []byte {
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rt := make([]byte, 0, 4)
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byteMsk := uint32(0x00_00_00_ff)
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rt = append(rt, byte((ts>>24)&byteMsk))
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rt = append(rt, byte((ts>>16)&byteMsk))
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rt = append(rt, byte((ts>>8)&byteMsk))
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rt = append(rt, byte(ts&byteMsk))
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return rt
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}
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