enter image description here[![enter image description here][2]][2]I'm using MSP430F5131 and trying to program it by IAR Embedded Workbench while using the MSP-FET debugger.

A short background of the PCB:

After i compiled the code in IAR with not errors found , i connected the MSP-FET to the MSP430 in a Spi-Bi-Wire connection according to the datasheet. The MSP430 is placed in a PCB which includes 12V input voltage and 2 regulators of 5V and 3.3V . The MSP430 I/O's are connected according to the datasheet (including external pullup resistors and capacitors) along with the Spi-Bi-Wire connections. I energized the PCB with a 12V supply voltage , connected the MSP-FET's connector to a Header connector on the PCB and the other side connected to the PC by USB.

My problem is :

In the IAR , once i try to download the code into the MSP430 (by clicking the 'Download and Debug' button) it says that it needs a firmware update , so i clicked ok and download the new update , but when it tries to initialize hardware i encounter the error :

"Fatal error: Could not find device (or device not supported)

Session aborted!"

I have tried multiple things in order to find the solution - with no success .

Does the AVcc and AVss needs to be connected even if i dont use any analog options? coz its not connected to anything.

I also tried to download the program to the MSP430 with code composer studio but encounter the same error.

The error pops up even if i dont connect the MSP-FET to the MCU (only to the PC by the USB cable).

I have connected the MSP-FET to the MCU like that :

  • RST/NMI/SBWTDIO of the MCU to TDO/TDI pin 1 of the MSP-FET.
  • TEST/SBWTCK of the MCU to TCK pin 7 of the MSP-FET.
  • a 3.3V that is supplied from a regulator in the PCB to VCC_TOOL pin 2 of the MSP-FET.
  • GND of the PCB to GND pin 9 of the MSP-FET.

Here's the error message i get:

[![The Error window][2]][2]

Here's the IAR settings for the FET Debugger:

[![FET Debugger settings][3]][3]

[![enter image description here][2]][2]

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    \$\begingroup\$ I would say your circuit is not wired properly. \$\endgroup\$ – Eugene Sh. Jan 23 '17 at 15:36
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    \$\begingroup\$ NB! I have read your post once again more careful, and noticed that you have a mistake in the wiring, if you use local power suppl, then you need to connect you local 3.3V line to the pin 4 VCC_TARGET of MSP-FET, and not to pin 2. \$\endgroup\$ – GAttuso Jan 24 '17 at 12:59
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    \$\begingroup\$ Well, then my suggestion list would be: 1) As already mentioned above, check all power lines; 2) Go through debugger troubleshooting list; 3) Make sure that the debugger MSP-FET is really working (test it with some other board/launchpad); 4) Post your problem on TI forum; \$\endgroup\$ – GAttuso Jan 24 '17 at 14:49
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    \$\begingroup\$ I measured the voltage between DVcc and DVss and the call is 0.7V , isnt it supposed to be 3.3V? maybe thats the problem? \$\endgroup\$ – עומר דגן Jan 24 '17 at 15:33
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    \$\begingroup\$ Well, that's definitely IS a problem. MCU can not even run when the DVCC < 1.8V. Check your regulator. \$\endgroup\$ – GAttuso Jan 24 '17 at 15:52

You have definitely made a critical mistake by not connecting the AVCC and AVSS pins to the proper supply voltages (VCC, GND). You mention this board has worked before? I don't see how that is possible given these pins were connected to their proper supply even if the FET was providing your board power.

Can you post a picture of your PCB layout? Are you getting exactly 3.3V outside your linear regulator? Measure the voltage across C5 or C7 to find out. The error you're getting is typically a power supply issue, but I see you have shorted AVSS and AVCC in your previous posts.

  • \$\begingroup\$ I still havn't shorted the AVcc and AVss to DVcc and DVss - working on it . The voltage i get when i measure across C5 or C7 is 0.7V - This seems like the voltage of the regulator output for some reason , maybe 3.3v rail is shorted somewhere.... \$\endgroup\$ – עומר דגן Jan 30 '17 at 13:24
  • \$\begingroup\$ I'm sorry but i dont have the PCB layout only the Electronic schematic \$\endgroup\$ – עומר דגן Jan 30 '17 at 13:28
  • \$\begingroup\$ Troubleshoot the 3.3V regulator first then, can you post the entire schematic of that 3.3V section? The picture that is posted cuts the input side circuitry. \$\endgroup\$ – Pablo Gonzalez Jan 30 '17 at 20:59
  • \$\begingroup\$ Alright i posted the entire schmatic of the PCB at my first post \$\endgroup\$ – עומר דגן Feb 1 '17 at 11:13
  • \$\begingroup\$ Are you at least getting 5V across C3 and C4? \$\endgroup\$ – Pablo Gonzalez Feb 3 '17 at 21:49

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