EZ430 CC2560 Board Held In Reset

Fred,

         My first guess would be to check the voltage level supplied by the batteries. It might be too low.

Regards,

~Miguel

Hi Miguel,

Batteries are good. I have a CC2560 whose code has not been modified. It works fine on the battery pack.

Fred

Could you share the major mods between the code that works and the one that does not?

~Miguel

Miguel,

No difference in code, just compiled and downloaded to device at an earlier date. I had done some work with the debugger in the interim, I'm thinking I must have changed a setting somewhere that is causing this. I don't think that it can be code because it starts up correctly when connected to the USB device, but not when connected to batteries.

Fred

Fred,

Could you feel the board to see if there's anything hot? Also, are the RED or Blue LEDs blinking?

Regards,
Gustavo

Hi Gustavo,

Nothing hot on the board when connected to batteries.

All three LEDs light up and function (green, blue, red) when connected to the USB debugger. Only the green LED lights up when connected to batteries.

I just grabbed the original, unmodified SDK from the website, and downloaded it to the target. Same behavior.

Fred

Fred,

What about the other target board? Does it show the same behavior?

Regards,
Gustavo

Gustavo,

The other target board (the one that was compiled and downloaded earlier) does not show the same behavior. It works correctly on both the USB debugger and on a battery connection (All three LEDs light up).

Fred

Fred,

One way to test this is to connect power from the battery  but still use the debugger (without using its power). This will require some splitting of cables but it's only 4 wires.

Then run the code and see if you're stuck.

Regards,
Gustavo

Fred,

     Could you check if the XTAL that is next to the MSP430 is oscillating?

Regards,

~Miguel

Hi Miguel,

Not sure where that signal is. Can you give me a screen shot of where I would probe?

Fred

Fred,

  Please look at the attachment. You can probe any of two ends of the XTAL.

Rgds,

~Miguel

Miguel,

Yes, it is a 33kHz sin wave.

Fred

Fred,

     Could you run the code in debug mode and check where the program halts please?

Regards,

~Miguel

Hi Miguel,

When connected to the debugger, it does not halt; it runs correctly. I am nearly 100% certain this board is damaged in some way. I have other boards though that work fine, so I think we can close this case.

Regards

Fred

I apologize. I forgot that it works with the debugger. Could you try the disabling the Sensor Initialization? i.e. Comment out the sensor_init() call under sdk_init_bsp() and check if the red and blue leds come out now.

Regards,

~Miguel

I made this code change and observed no change in behavior. If you are curious about what has failed in hardware, we can continue to dubug this, but for my part I'm no longer concerned about it. Regards - Fred

Ok. Let us know if you need further help.

~Miguel