Czy wolisz polską wersję strony elektroda?
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1.3. Communications baud rate is 9600 baud (default). Clock speed for this baud rate
is 153.6 Khz, plus or minus 5 khz (as tested by PL& MS). Other baud rates and
matched clocks may be possible as well. Clock GENERATED by the Host
terminal (Consult or PC Interface). Synchronizing the clock to the data lines is
NOT necessary. E.g. the clock free runs at the required speed. (16x the data rate).
1.4. The Data Format is 1 start bit (always low), 8 data bits, no parity, 1 stop bit
(always high).
The data is actually processed by the ECU's micro LSB first. Each serial string is
made up of blocks of : <Start bit (0)> <8 data bits LSB-MSB(xxxxxxxx)><Stop
bit (1)>
Data is sent as raw Hex,8N1, no spaces or carriage return characters etc are
used.
Cytat:
Initialization String. The ECU will not communicate until a valid hex
initialization string message is detected.. (0xff)(0xff)(0xef) must be sent at the
correct baud rate with the clock present on the ECU clock pin.
Once Initialized the ECU responds with (0x10), it is then ready for commands.
2. Command format and sequence (as tested with a laptop and terminal program in
HEX mode).
Consult terminal (or PC) sends a query command whose value determines
function to be performed.
ECU responds with the same command byte but having inverted all bits as an
error check. Data send after a command is echoed same as sent.
E.g. Send (0xd1)(hex), ECU responds with (0x2e). For valid commands only.
Consult terminal sends a go ahead/terminate message byte (0xf0)
ECU responds with result of query starting with a frame start leader character
(0xff), then a byte it indicate the number of data bytes to follow, then the data.
ECU WILL STREAM THE REQUESTED DATA until forced to stop.
Consult terminal then sends a stop byte, Command 0x30
e.g. Send (0xd1)(0xf0) , Ecu replies (0x2e)(0xff)(0x02)(0x55)(0x00). Where 2e
is the inverted command, FF is the frame start byte, 02 is the number of data
bytes to follow, 55 is the fault code (55 = no fault), 00 is fault code MSB.
Read any Register Parameter (Live sensor data stream)
(0x5a)<parameter code to read>(0xf0) for single byte stream
(0x5a)<parameter>(0x5a)<next parameter>(0x5a)<next parameter>(0xf0)
for a multi-byte response stream. Maximum of 20 bytes.
terminate command with (0xf0) to start data stream, stop with (0x30).
Cytat:
Data Name Byte Register No Scaling
Tachometer MSB 0x00 See LSB
Tachometer LSB 0x01 Value * 12.5 (RPM)
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