MSP430 Based Chronulator (using Launchpad chip)

Step 8 Using "spy-by-wire"

"spy-by-wire" is a two wire interface to program the flash memory on the MSP430 microcontroller. It is available on the newer MSP430 chips, including all of the chips that can be used on the Launchpad. The two pins used in this interface are RST and TEST. We will also bring over the power connections, VCC and GND, from the Launchpad when we program.

Below is a picture of the connections required to use the "spy-by-wire" interface.

Programming Connections:
    1.  Disconnect the battery pack from the project board.
    2.  Connect jumper from Launchpad J6 terminal "Vcc" to project board Vcc test point.
    3.  Connect jumper from Launchpad J6 terminal "Gnd" to project board Gnd test point.
    4.  Connect jumper from Launchpad J2 terminal "TEST" to project board TEST test point.
    5.  Connect jumper from Launchpad J2 terminal "RST" to project board RST test point.
    note: All 5 jumpers of Launchpad terminal J3 should be in place.

When the two boards are connected in this manner, you can program the microcontroller while it is in the project board.  You use IAR Embedded Workbench KickStart just as you would if the whole project was on the Launchpad.

Since we are using a different voltage supply voltage (2.5V instead of 3.3V) in this project, you must break the connections when you are testing the project board. Note: If you are using 4 AA batteries and a 3.3V regulator I would still break the connections to be sure that voltage you use to calibrate the meters with is correct.  

Testing Project Board Connections:
    1.  Disconnect all four of the project board connections to the Launchpad.
    2.  Connect the battery pack to the project board.
    3.  Press the Reset button.