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Posts posted by bootchk

  1. Sorry, you are correct, the blink sketch DOES work.  Thanks.


    (I don't know why I chased down this rabbit hole, I was thrashing in updating the firmware or uploading.)


    Why would Energia be using the WDT?  Also, I recall code to enable interrupts in the body of delay(), but not code to disable them.  I need to read it more carefully.

  2. Never mind: I was wrong, Blink does work out of the box, see the answers below.


    Blink sketch doesn't work out of the box.  I substitute __delay_cycles(10000000) and it works (led blinks.)  I also coded it in C and it works.  I am thinking there is a bug in the delay() function.


    In the code below, if I comment out the call to delay(), the green led blinks.  If the call to delay() is in the code, the led does not blink. I presume delay() never returns or otherwise gets lost.  Even if the parameter is 1.


    I have not used mspdebug and gdb to debug it, since mspdebug complains it can't find the FET.   I did try reading the code for delay() in wiring.c



    Ubuntu 16.04 64 bit

    Energia release 17

    Launchpad MSP-EXP430FR4133




    #define LED LED2

    void setup() {

      // initialize the digital pin as an output.
      pinMode(LED, OUTPUT);
      //PM5CTL0 &= ~LOCKLPM5;


    void myDelay() {
      //delay(1000000); // <- NOT WORKING, I tried many values including 1

    void loop() {
      digitalWrite(LED, HIGH);   // turn the LED on (HIGH is the voltage level)
      digitalWrite(LED, LOW);    // turn the LED off by making the voltage LOW

  3. I want a temporary connection to my target board, to program it using SBW.  I don't want to populate the target board with a connector.  I previously used a row of plated through holes and just manually held a row of pin headers jammed at an angle into the holes.


    Is there a better solution?  Something that clamps or is spring loaded to the board/pads?  A female edge connector?  A female USB connector?  An RJ-45 ethernet connector?


    I'm using the EZ430-2013 USB launchpad.  I only need four wires.  It takes a few tens of seconds to flash the target.  The production volume is low (say tens of units.)  The target board is only a few square centimeter so I prefer a small footprint for any pads.  I prefer to not design the board outline for an edge connector or USB.


    It doesn't have to clamp, but my feeling is that spring loading of some sort would be more reliable than my unsteady hand jamming a row of sharp, hard pins into through holes.

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