Charles Lohr
clohr@yahoo.com

Software Engineer, 2005 – 2007, Visteon (contract via EnGenius Inc., Livonia, MI)
Automotive Electronic Functional Test System for PCMs (Powertrain Control Modules) – Functional test system to test PCMs with up to 250 pins.  The test system consists of up to 52 “pincards” and load boards on a CAN network.  The pincard consists of an ST10 microprocessor and eight source and measurement instruments.  The pincard can sample up to 19200 14-bit ADC samples per second.  The pincard ST10 firmware implements an object model supporting 512 instruments objects.  Instruments can measure voltage, source voltage, source current and switch buses.

• Wrote the embedded firmware (60 “C” modules) for a test instrument board “pincard” on a CAN network containing the hardware for 8 test instruments and 512 test objects.
• Developed an object oriented protocol for a CAN network that can address the properties and methods of thousands of test instrument objects.

Software Engineer, 1996 – 2005, Visteon and Ford Motor Co. (contract via EnGenius Inc., Livonia, MI)
Automotive PCM Embedded Durability Test – The system consists of a test program that runs in a PCM while the module runs through a 1000 hour durability test.  The program is a multi-tasking non-preemptive operating system and application.  An external test system can send SCP, CAN and ISO-9141 message commands to the PCM to query for fault information and control 70 I/O lines.

• Designed/Implemented embedded durability test programs for PCMs based on 83C196 and ST10 microprocessors.  Wrote drivers, I/O servers, and state machines.
• Designed/implemented protocol drivers for CAN, SCP and ISO-9141
• Wrote Visual Basic applications to test the PCM test programs
• Designed a test system CAN command communications protocol

Software Engineer, 1995 – 1995, Ford Motor Co. (contract via Computer Methods Corp., Livonia, MI)
Automotive Networked Body Modules, Embedded Systems - System consists of networked body modules in a “segment demonstration vehicle”.  Each module controls a group of electrical devices in an area of the vehicle.  Electrical devices include:  windows, mirrors, alarms, climate control air and water valves and lighting.

• Designed and implemented software drivers for body modules
• Data flow diagram for a body module
• System testing of a body module consisting of 160 “C” files

Project Leader, 1990 – 1994, Ford Motor Co. (contract via Computer Methods Corp., Livonia, MI)
Automotive Factory Powertrain Diagnostic System - A networked automotive factory “End of Line” system (installed at Ford Wixom Assembly Plant) consisting of an OS/2 server and eight PC subsystems. 

■ Test Cell Subsystem - the driver runs the vehicle through a powertrain test and the application delivers the results to a database (log file) on the server.
■ Repair Bay Subsystem - the repair bay technician uses the application access and update the database.
■ Final Inspection Subsystem - is used to access the database and report the pass/fail status of the vehicle to the database.

• Managed a software project to develop a Windows 2nd generation (EOL2) flat-file database
• Supervised a group of four software engineers maintaining the subsystem applications
• Btrieve database design and implementation (12 modules, 34 functions, 211K C source code)
• Information manager (MTD) design and implementation, Team of three people.  (17 modules, 80 functions, 427K C source code)

Education 1969 - 1973, Eastern Michigan University, Ypsilanti, MI, B.S. in Industrial Technology

Continuing Education - Courses

• ST7 Microprocessor Training, ST, Livonia, MI 2004
• MDC555 Black Oak Processor Training, Motorola, Livonia, MI 1999
• “Advanced Microsoft Windows”, Microsoft University, Redmond, WA, 1988
• “Diagnostic Software: Planning and Design”, Institute for Advanced Professional Studies, Newton, Massachusetts, 1981