CCS/MSP430FR6989: Opening COM port failed! Connection to MSP430 dev boards.

Are you trying to load code to your target board or simply communicate with it via serial port?

To load code, that normally happens via JTAG, you must use the Debug button in CCS (little bug icon). Are you using this or something different? This icon, by default, will perform the job of connecting to target and loading the code from your active project. 

AartiG, I am trying to do both. I get a problem as soon as I try to connect to the board. In CCS Cloud I go to "Target" and then "Connect COM port...". I choose proper COM port that corresponds to the board and I get the error that I attached to my post. I just tried to upload a code to the board without choosing "Target -> Connect COM port..." and it uploaded well in CCS Cloud. I can't get it to work in Energia or CCS. In Energia I choose "Tools -> Boards" and choose the right board. Then I choose the right COM port in "Tools -> Port". I can't even verify the code. It gives an error:

"Energia: 1.6.10E18 (Mac OS X), Board: "MSP-EXP430FR6989LP"

failed MSpanList_Insert 0x30d000 0x2ec6161db07c 0x0
fatal error: MSpanList_Insert

runtime stack:
runtime.throw(0x2ad50b)
/usr/local/go/src/runtime/panic.go:491 +0xad fp=0x7ffeefbff460 sp=0x7ffeefbff430
runtime.MSpanList_Insert(0x2cb168, 0x30d000)
/usr/local/go/src/runtime/mheap.c:692 +0x8f fp=0x7ffeefbff488 sp=0x7ffeefbff460
MHeap_FreeSpanLocked(0x2c7d60, 0x30d000, 0x100)
/usr/local/go/src/runtime/mheap.c:583 +0x163 fp=0x7ffeefbff4c8 sp=0x7ffeefbff488
MHeap_Grow(0x2c7d60, 0x8, 0x0)
/usr/local/go/src/runtime/mheap.c:420 +0x1a8 fp=0x7ffeefbff508 sp=0x7ffeefbff4c8
MHeap_AllocSpanLocked(0x2c7d60, 0x1, 0x0)
/usr/local/go/src/runtime/mheap.c:298 +0x365 fp=0x7ffeefbff548 sp=0x7ffeefbff508
mheap_alloc(0x2c7d60, 0x1, 0x12, 0x0)
/usr/local/go/src/runtime/mheap.c:190 +0x121 fp=0x7ffeefbff570 sp=0x7ffeefbff548
runtime.MHeap_Alloc(0x2c7d60, 0x1, 0x10000000012, 0xf989)
/usr/local/go/src/runtime/mheap.c:240 +0x66 fp=0x7ffeefbff5a8 sp=0x7ffeefbff570
MCentral_Grow(0x2cfad8, 0x0)
/usr/local/go/src/runtime/mcentral.c:197 +0x8b fp=0x7ffeefbff610 sp=0x7ffeefbff5a8
runtime.MCentral_CacheSpan(0x2cfad8, 0x0)
/usr/local/go/src/runtime/mcentral.c:85 +0x167 fp=0x7ffeefbff648 sp=0x7ffeefbff610
runtime.MCache_Refill(0x309000, 0x12, 0x0)
/usr/local/go/src/runtime/mcache.c:90 +0xa0 fp=0x7ffeefbff670 sp=0x7ffeefbff648
runtime.mcacheRefill_m()
/usr/local/go/src/runtime/malloc.c:368 +0x57 fp=0x7ffeefbff690 sp=0x7ffeefbff670
runtime.onM(0x224f58)
/usr/local/go/src/runtime/asm_amd64.s:273 +0x9a fp=0x7ffeefbff698 sp=0x7ffeefbff690
runtime.mallocgc(0x120, 0x1beba0, 0x0, 0x0)
/usr/local/go/src/runtime/malloc.go:178 +0x849 fp=0x7ffeefbff748 sp=0x7ffeefbff698
runtime.newobject(0x1beba0, 0x309000)
/usr/local/go/src/runtime/malloc.go:353 +0x49 fp=0x7ffeefbff770 sp=0x7ffeefbff748
runtime.newG(0x276ba)
/usr/local/go/src/runtime/proc.go:233 +0x2a fp=0x7ffeefbff788 sp=0x7ffeefbff770
allocg(0x2ba660)
/usr/local/go/src/runtime/proc.c:925 +0x1f fp=0x7ffeefbff798 sp=0x7ffeefbff788
runtime.malg(0x8000, 0x2ba700)
/usr/local/go/src/runtime/proc.c:2106 +0x1f fp=0x7ffeefbff7c8 sp=0x7ffeefbff798
runtime.mpreinit(0x2baac0)
/usr/local/go/src/runtime/os_darwin.c:137 +0x27 fp=0x7ffeefbff7e0 sp=0x7ffeefbff7c8
mcommoninit(0x2baac0)
/usr/local/go/src/runtime/proc.c:201 +0xc9 fp=0x7ffeefbff808 sp=0x7ffeefbff7e0
runtime.schedinit()
/usr/local/go/src/runtime/proc.c:138 +0x55 fp=0x7ffeefbff830 sp=0x7ffeefbff808
runtime.rt0_go(0x7ffeefbff868, 0x14, 0x7ffeefbff868, 0x0, 0x0, 0x14, 0x7ffeefbffa10, 0x7ffeefbffa48, 0x7ffeefbffa54, 0x7ffeefbffa64, ...)
/usr/local/go/src/runtime/asm_amd64.s:95 +0x116 fp=0x7ffeefbff838 sp=0x7ffeefbff830
arduino-builder returned 2

Error compiling for board MSP-EXP430FR6989LP."

Viacheslav Plotnikov said:

I just tried to upload a code to the board without choosing "Target -> Connect COM port..." and it uploaded well in CCS Cloud. I

That is good news. 

I'm not very familiar with Energia so I can't comment on the errors you are seeing there. I would suggest continuing to run and debug code either on CCS Cloud or CCS desktop. 

AartiG, could you please connect any board to a computer and choose "Target -> Connect COM port..." in CCS Cloud? Does it show the same error? I tried it already on several boards and different computers. I wonder if there is a problem with CCS Cloud at the moment. My boards are updated with the latest firmware.

I just tried this with the new MSP430G2ET launchpad. I first clicked on Debug to load the program to device. Then I selected Target->Connect COM port and it did not show any errors. I clicked on Resume to run the program and text was printed on the serial port. Please see screenshot below.