OpenECU Frequently Asked Questions

This is the frequently asked questions site for OpenECU.

Software build troubleshooting

• I see 'could not find S-function' errors when I try to build, what is wrong?

• "Cannot find ...rtwlib.a: No such file or directory"

• Unsuccessful build for model..but build completed successfully

• "Error 0169 at offset 00016B7F: Unexpected EOF" - what does that mean?

• "Error (dcc:1173): compiler out of sync. Probably missing ‘;’ or ‘}’" – what does that mean?

• Replacement type (FREAL, F32, S32, S16, S8, U32, U16, U8, U8, INT, UINT) must be defined as a Simulink.AliasType or a Simulink.NumericType object, and the object must resolve to a primitive type. – what does that mean?

• What are the restrictions on model names?

• I have the latest version of the Diab compiler, why doesn't it work?

• The channel selection changed in my model, what happened?

• "signal attribute specified.. is invalid because individual signals contained in this line are mapped to different memory locations" - what does that mean?

• Why does my application have a larger code size when compiled with GCC?

• My simulink model is developed using OpenECU r2.8.0 and MATLAB 2018b with RSim coder. Why does it fail to build?

• Empty ASAP2 File - does not contain constants, calibrations, array maps, enumerations or signals

OpenECU 2.9.0 r2020-1 software bugs and improvements

• Why does MATLAB crash when I open a simulink model with reference configuration?

• buildinfo.mat build error

• Two Pot Demo Model build error

Software troubleshooting

• My ECU keeps resetting, how do I debug it?

• I've encountered a conflict with pan.mdl, what do I do?

• The channel selection changed in my model, what happened?

• The channel selection list does not match my ECU

• My CAN message is transmitting at a rate that is different than what I specified in my CANdb file. Why?

• CANdb received or transmitted values are always zero, what is happening?

• Opening a model raises an error with MATLAB Connector, what do I do?

• My calibration map / table is not working.

Hardware troubleshooting

• How do I recover an ECU that will not communicate with the calibration tool?

• My ECU is dead, what do I do?

• How do I determine the ECU status using the flash code output?

• My ECU keeps resetting, how do I debug it?

• Why is my CAN bus not working?

• My digital input is not working

• My digital output is not working

• My M670 is indicating a fault on Monitor (Fault) - what's wrong?

• My analog input is not working

• My frequency input is not working

• My PWM/frequency output is not working

• My scope trace looks good, but my frequency / PWM input is not working

System troubleshooting

• How do I wire up ignition coils to an OpenECU?

Flashing and calibration troubleshooting

• How do I reprogram my ECU?

• How do I recover an ECU that will not communicate with the calibration tool?

• How do I determine the ECU status using the flash code output?

• How do I use ETAS INCA with OpenECU?

• I know a data dictionary signal is changing, but I can't see it change in the calibration tool

• Can I make the ECU automatically reset after programming my application?

Installation and setup of OpenECU on your PC

• What kind of PC do I need to use OpenECU?

• I've installed OpenECU, now how do I run it?

• How do I set environment variables?

• Does OpenECU work on Windows 8 and 10?

Information (does OpenECU do X?)

• Which tools does OpenECU need to work?

• Which auto-coders are supported?

• Can SLX file format be used with OpenECU?

• I have version x of Simulink, will it work with OpenECU?

• Does OpenECU have built-in OBD-compliant features?

• Can I use double precision floating point math with OpenECU?

• Can I use OpenECU blocks in a library or reference model?

• Can I use Simulink built-in lookup blocks?

• Which blocks are supported by my ECU?

• Can I reuse axis names in different lookup blocks?

• Does OpenECU support wake-on-CAN?

• Can I have information about Subaru/Mitsuhishi/other-car-make ECU?

• Does OpenECU software support protecting a subsystem of application software developed in simulink through the use of protected reference model?

• Does OpenECU support application development and reprogramming using UDS protocol?

• What are the throughput limitations for CAN C and D on the M110?

How-to guide (nothing is wrong, but I don't understand how to do something)

• What is a data dictionary and how do I use it?

• What are the naming rules for data dictionary entries?

• How do I use the adaptive memory blocks?

• What is power hold and how should it be used?

• When is non-volatile application data erased?

• How do I determine which version of boot/platform/application software is on my ECU?

• What is the memory summary that is shown at the end of an OpenECU build?

• How do I check the performance of an OpenECU application?

• How do I find out how much RAM / stack / application memory / calibration memory my application is using?

• How do I find out how much CPU throughput my application is using?

• How do I find out how much time is being used by each of my application tasks?

• How do I find out how close I am to a task overrun?

• Will my CAN database (CANdb or .dbc) file work with OpenECU?

• Where can I find examples?

• Can I use non-ASCII characters in my OpenECU model?

• Can I use double precision floating point math with OpenECU?

• Can I use OpenECU blocks in a library or reference model?

• Can I use Simulink built-in lookup blocks?

• How does the leaky bucket work?

• How do I set the transmition rate for CAN messages in my CAN database (CANdb) file?

• How does quadrature decode work?

• How do I use CCP security?

• Can I do wasted spark?

• How should I use the ECU pin electrical current monitors?

• UDS Reprogramming Specification

• How to perform OpenECU UDS reprogramming ?

M560/M580 Questions

• Does the M560/M580 provide an API for I/O and other drivers?

• Does the M560/M580 provide a real-time operation system, task adjusting interface (including 10ms, 20ms, 100ms tasks)?

• Does the M560/M580 support Non-Volatile Memory? Does the M560/M580 store self-learning data after ignition cycle? What is the memory size?

• Does the M560/M580 support ASAP2 calibration tools and the CCP protocol in development stage? What is the size of calibration memory?

• Does the M560/M580 support off-line reprogramming, does it have a bootloader?

• Does the M560/M580 provide a hardware diagnostic interface, I/O signal diagnostics, sensor power supply diagnostics, a CPU Reset interface?

• Does the M560/M580 have a level 3 safety structure and software interface, supporting RAM Partitioning, Flash partitioning, program flow monitoring, CPU working frequency monitoring, and CPU load monitoring?

• What is the M560/M580 initialization time and system start-up check completion time?

• Do the two processors in the M560/M580 use the same compiler?

• Does the M560/M580 secondary processor support CAN CCP calibration?

• Does the M560/M580 have a solution for LIN communication?

• I’m using the M560/M580 for the first time. What is the minimum requirement to deploy code to primary micro without interference from secondary micro?

• Does the M560/M580 have Wake on CAN capability?

• I have questions related to UDS protocol in M560/M580.

• How does PLC communication protocol work in M560 & M580?