Introduction

Welcome!  uBug12JE is a Java-based multi-platform program designed specifically to interact with the serial monitors programmed into the Flash of most Technological Arts HCS12 and S12X microcontroller modules. It is able to program and erase memory, disassemble a range of program memory, and assist in debugging user developed applications.  This manual provides the information needed to use all the capabilities that uBug12JE has to offer.

We'll start by explaining how to install the program onto your computer. Next we will outline how to connect your computer to your MCU module (target) so that uBug12JE can communicate with it. Then you'll be shown how to use uBug12JE to program the target with an S-record file. You will next learn how to take advantage of the user-defined buttons to make the development cycle easier, along with some miscellaneous features. We then provide a Glossary listing all of the commands available in uBug12JE. This is followed by a short list of essential rules to follow when developing software with uBug12JE. The manual concludes with an Appendix describing the procedure, if needed, to program the serial monitor into your target MCU, as required by uBug12JE.

uBug12JE provides a means to program S12 and S12X targets and troubleshoot most user developed code issues without the use of an external BDM pod. This includes capabilities to examine and change memory locations, register values, single step through code, and set multiple breakpoints at any point in memory. For debugging capabilities beyond this, a BDM pod will be needed. The Technological Arts UBSDMLT pod is a good low-cost choice for this.