Subpage of AfreshTiny
Using round as AIM-display (eg. genboard users)
Important: please follow the steps precisely.For AIM, the setup procedure uses megatune (not VemsTune).'''
Overview:
Useful to get Lambda, EGT, RPM, MAP and other signals via serial port from the V3.3 ECU (or other device that sends AIM compatible data via serial/RS232 port)
- Round (firmware since 2008-08) is capable to receive AIM (standard aim protocol 19200,8n1 rs232, 5bytes per packet) from PC or v3.x or other aim-compatible ECU. This provides the best readibility for the most important parameters like lambda, MAP, EGT, RPM or wheelspeed
- to avoid confusing normal users, new AIM-capable round releases will be under [1]
- The last released zip with aim-capable firmware you can check on AfreshTiny/FirmwareUpgrade
- the genboard can send realtime AIM data (from version 1.1.42)
- Any channel sent by the sending device can be displayed on top or bottom display, with any scaling, offset and dot position
- any number of rounds can get the data (eg. 1 genboard feeding 9 rounds displaying total 18 data).
Install Firmware
Installation of an AIM capable firmware is the same as a Non-Aim Firmware, see AfreshTiny/FirmwareUpgrade
Default config
A default config is available at http://www.vems.hu/files/Display/Round/round-aim-default-config.msq
You can use it as a starting config, but never forget to write down to a paper your calibration values (egt_cal, egt_offset, wbo2_pump_pw_zero, wbo2_nernstdc_target ) and set it up after config upload.
Displayed values
Display state (mode) can be switched with the button (if button is enabled, see AfreshTiny/AnalogInput): 8 sets of top/bottom values can be configured
- the last received AIM data is displayed. If the display does not update, check the serial line and the sending device. You can use a switch in the serial line to intentionally cut the circuit at the desired time if you like.
Connection
- to PC: just connect Round's RS232 port to PC's com port
- to ECU: connect RS232,pin 2(tx) ECU side to RS232,pin 3(rx) ROUND side and the pin 5(ground) on both ECU and ROUND
- if you use more than one ROUND the rx pins are common
ECU
- v3 firmware must be at version 1.1.42 or later
- to enable with VemsTune (must be newer than 2008-09-30) (or Megatune):
- Outputs menu / Display Settings / AIM Enable
- to enable in config files: set lcd_c0 bit2
- ECU can't connect to PC and Round at the same time
Setting the round
Round firmware must be newer than 2008-08
with Megatune:
(You will find in the firmware's uzipped directory)
- AIM enable:
- in Settings menu / Display settings
- AIM settings:
- There exists configuration (aim channel and Ax+B linear transformation) for 2 top (T0,T1), and 2 bottom values (B2,B3)
- Channel x num: there you can choose the number what to show as Tx
- Channel x mul(%): the data from ECU has different format, with this value you can multiplicate ( 0..2X )
- Channel x add: the data from ECU has different format, with this value you can add offset
- Zero means 8192 so you can incrase or decrase value with 8192
- Channel x dot: the data from ECU has different format, with this value you choose where to show the dot
- Display settings:
- You can show 8 sets of top/bottom values Measured and Aim data too
- Aim realtime data types and numbers:
Using:
- After power up the well configured ECU will send the AIM data and the connected Rounds will show as it configured
- The switch on the Round will change the 8 display modes (disp_state variable)
Feedback from round => genboard (eg. button for launch or table-config-switch?) is not currently planned.
The genboard firmware internal CLT temperature representation was -40..+102C. Around 1.1.4x it was changed to max +155C. Sending via aim does not change the limits.