Things

This are some of the things I have done or I am doing. Slowly more are going to be added:

68HC11 Programmer.

The 68HC11 it's a very good microcontroller, it has almost any thing you probably will need for any project, so maybe you are only restricted by your imagination...., as long as you have a programmer or lots of money to buy one (>$1000).

After studying all the manuals that I got with my evaluation board and bug a friend a lot of times to use his very expensive programmer. I began my own programmer.

It is based on fact that this microcontroller has burned in firmware a special bootstrap mode that loads a program through the serial port.

This works the following way:

  1. - In a PC it's setup an S19 program.
  2. - In the programmer it's put a blank 68HC11E2.
  3. - The programmer it's turned on.
  4. - In the PC it's run the special software for programming the microcontroller.
  5. - The indicators (LED) blink as each byte it's received.
  6. - After a while the programmer informs of successful or unsuccessful programming.
I like a lot this programmer it gets an S19 program and validates each record, it to the PC each byte processed and it will tell you if it worked or not so it will be easy to know where is a problem, if there is one.