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75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
package can
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import (
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"fmt"
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)
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// https://en.wikipedia.org/wiki/OBD-II_PIDs
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// https://www.csselectronics.com/pages/obd2-explained-simple-intro
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// https://www.csselectronics.com/pages/obd2-pid-table-on-board-diagnostics-j1979
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// https://stackoverflow.com/questions/40826932/how-can-i-get-mode-pids-from-raw-obd2-identifier-11-or-29-bit
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// https://github.com/ejvaughan/obdii/blob/master/src/OBDII.c
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const OBD2BroadcastRequestID = 0x7DF
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const OBD2ECUResponseMinID = 0x7E0
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const OBD2ECUResponseMaxID = 0x7EF
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const OBD2BroadcastRequestID29bit = 0x18DB33F1
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const OBD2ECUResponseMinID29bit = 0x18DAF100
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const OBD2ECUResponseMaxID29bit = 0x18DAF1FF
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type OBD2Service uint8
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func (s OBD2Service) String() string {
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switch s {
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case 0x01:
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return "Show current data"
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case 0x02:
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return "Show freeze frame data"
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case 0x03:
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return "Show stored Diagnostic Trouble Codes"
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case 0x04:
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return "Clear Diagnostic Trouble Codes and stored values"
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case 0x05:
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return "Test results, oxygen sensor monitoring (non CAN only)"
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case 0x06:
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return "Test results, other component/system monitoring (Test results, oxygen sensor monitoring for CAN only)"
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case 0x07:
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return "Show pending Diagnostic Trouble Codes (detected during current or last driving cycle)"
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case 0x08:
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return "Control operation of on-board component/system"
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case 0x09:
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return "Request vehicle information"
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case 0x0A:
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return "Permanent Diagnostic Trouble Codes (DTCs) (Cleared DTCs)"
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}
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return fmt.Sprintf("service 0x%x", uint8(s))
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}
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type OBD2MessageType uint8
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const (
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OBD2MessageTypeRequest OBD2MessageType = iota
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OBD2MessageTypeResponse
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)
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func (t OBD2MessageType) String() string {
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if t == OBD2MessageTypeRequest {
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return "request"
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} else {
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return "response"
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}
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}
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type OBD2Message struct {
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Type OBD2MessageType
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ECU uint8
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Service OBD2Service
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PID OBD2PID
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Size uint8
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Data []uint8
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}
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