hi mi first post here:)
I am using MS1 and I want to calibrate my air and colant temp. sensor.
I have measured the temp. and resistance for both sensors.
The problem is how to write the data into the MS. Do I need a .s19 file if yes where can I get it. Do I need to enter into boot mode of my MS if yes how?
Please can you help me.
tnx
MS1:easytune problem.
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
-
Matt Cramer
- Super Squirter
- Posts: 2951
- Joined: Sat Jul 03, 2004 11:35 am
Re: MS1:easytune problem.
I'm guessing you mean EasyTherm. Here's how you use that. When you open EasyTherm, there will be several options you need to set. It defaults to GM sensor calibrations. On our ready-made units, you will leave the bias resistor value set at 2490 ohms; you'll only change this if you have opened the Megasquirt and swapped out the resistors.
The boxes in the middle of EasyTherm are where you enter the sensor calibration data. You will need the sensor resistance at three temperatures. You can obtain this from a factory service manual or simply by testing the sensors in boiling water, ice water, and water at a measured room temperature. The sensor needs to be what's known as a negative temperature coefficient thermistor. This is simply a fancy engineering word for saying the resistance goes down as the temperature goes up.
Next, you need to select the code version. You'll set it to "Custom" in many cases. Leave the start address alone. Then you get this information into the code by clicking "Write .inc and .s19 Files." It will prompt you to open an S19 file containing the code. Select the file that corresponds to the firmaware version you are using.
EasyTherm will generate four files. One is an S19 file that will have the same name as the original with "_mod" added to the end of the file name. The other three are .INC files for MegaTune. Their names are airdenfactor.inc, matfactor.inc, and thermfactor.inc.
EasyTherm can load the S19 file into Megasquirt, too. Power down the Megasquirt, open it up, and put the boot jumper in place. Then connect it to the computer and power it up, ideally on a Stimulator. If you power it up on a car, disconnect Megasquirt from any coils or ignition modules it may be connected to. Then specify the COM port where you have Megasquirt attached and click the "Download to MegaSquirt" button. EasyTherm will prompt you to select the S19 file you need; it will be the one that ends in "_mod" that you've just created. It will then download your newly calibrated firmware. Shut down the Megasquirt, remove the boot jumper, and close its case back up.
If you had the firmware you started with in the same folder as your car project, it will automatically put the INC files in the right place. Otherwise, you'll need to copy them so that MegaTune will be able to correctly interpret the sensor data. The default location for these files is in the EasyTherm folder if you have altered a firmware copy in the EasyTherm folder. They go in the mtCfg folder in your project folder. If the project was named car1 and you have the usual folder setup for MegaSquirt, for example, you would want to copy the INC files to this folder:
C:\Program Files\MegaSquirt\car1\mtCfg
Once you've got that taken care of, you will have your firmware uploaded and MegaTune will know what to expect. This takes care of your sensor calibration.
The boxes in the middle of EasyTherm are where you enter the sensor calibration data. You will need the sensor resistance at three temperatures. You can obtain this from a factory service manual or simply by testing the sensors in boiling water, ice water, and water at a measured room temperature. The sensor needs to be what's known as a negative temperature coefficient thermistor. This is simply a fancy engineering word for saying the resistance goes down as the temperature goes up.
Next, you need to select the code version. You'll set it to "Custom" in many cases. Leave the start address alone. Then you get this information into the code by clicking "Write .inc and .s19 Files." It will prompt you to open an S19 file containing the code. Select the file that corresponds to the firmaware version you are using.
EasyTherm will generate four files. One is an S19 file that will have the same name as the original with "_mod" added to the end of the file name. The other three are .INC files for MegaTune. Their names are airdenfactor.inc, matfactor.inc, and thermfactor.inc.
EasyTherm can load the S19 file into Megasquirt, too. Power down the Megasquirt, open it up, and put the boot jumper in place. Then connect it to the computer and power it up, ideally on a Stimulator. If you power it up on a car, disconnect Megasquirt from any coils or ignition modules it may be connected to. Then specify the COM port where you have Megasquirt attached and click the "Download to MegaSquirt" button. EasyTherm will prompt you to select the S19 file you need; it will be the one that ends in "_mod" that you've just created. It will then download your newly calibrated firmware. Shut down the Megasquirt, remove the boot jumper, and close its case back up.
If you had the firmware you started with in the same folder as your car project, it will automatically put the INC files in the right place. Otherwise, you'll need to copy them so that MegaTune will be able to correctly interpret the sensor data. The default location for these files is in the EasyTherm folder if you have altered a firmware copy in the EasyTherm folder. They go in the mtCfg folder in your project folder. If the project was named car1 and you have the usual folder setup for MegaSquirt, for example, you would want to copy the INC files to this folder:
C:\Program Files\MegaSquirt\car1\mtCfg
Once you've got that taken care of, you will have your firmware uploaded and MegaTune will know what to expect. This takes care of your sensor calibration.
