Re: Problems with IAR and programming

Hi Peter I rarely use the FET boards, and only very occasionally the 
Launchpads. Mostly I find that I have boards of my own that are 
sufficiently close to what I need and they have expansion capability 
that allows me to test a new circuit or sensor. Typically I might get a 
free EVK for a component (or buy one from Sparkfun or the manufacturer 
if I really have to) to test a new part out but for more complex 
circuits I build a few prototypes.

For example when I was working on an asset tracker with long battery 
life (2-4 years) I used an existing board with 9 axis motion sensor and 
pressure sensor and bought the Telit 865 board from Sparkfun for the GSM 
modem, but when I was working on a vibration logger I used the 2618 EVK 
because it had the SD card on board.

Al

On 23/02/2015 12:11 PM, 'Peter Grey' [email protected] [msp430] wrote:
>
>
> Hi Al,
>
> That is what I thought. But I only had unregulated ones in stock. I 
> will pick up one this morning and see how it goes.
>
> I am using SBW but still using the MSP430-FETUIF. Do you use the same 
> or is it a launchpad device? I would like to get a more reliable 
> emulator than this.
>
> Cheers
>
> Peter
>
> *From:*[email protected] [mailto:[email protected]]
> *Sent:* Sunday, 22 February 2015 3:18 PM
> *To:* [email protected]
> *Subject:* Re: [msp430] Problems with IAR and programming
>
>
>
> Hi Peter, I would suspect the wall wart as the issue. i seem to recall 
> somebody else with a similar problem that went away when they replaced 
> the wall awrt with a well regulated supply.
>
> When I worked with the Telit 865 module I used a boost regulator with 
> an Li-poly capable of delivering 4A continuous. It wasn't a large 
> battery. That was for portability though as I didn't want to be tied 
> to a vehicle supply.
>
> The SBW is the Spy By Wire interface used on a lot of the smaller 
> parts. I rarely need to go to large parts unless I need lots of I/O, 
> and this fits in fine.
>
> Al
>
> On 22/02/2015 1:02 PM, 'Peter Grey' [email protected] 
> <mailto:[email protected]> [msp430] wrote:
>
>     Hi Al
>
>     My difference in Vcc is very small as noted below. But I agree it
>     is something between the 2 supplies that is causing the problem,
>     as Emmett alluded to. I will try his suggestions and see how it goes.
>
>     What is the SBW dongle you refer to in your email?
>
>     Thanks
>
>     Peter
>
>     *From:*[email protected] <mailto:[email protected]>
>     [mailto:[email protected]]
>     *Sent:* Saturday, 21 February 2015 9:55 PM
>     *To:* [email protected] <mailto:[email protected]>
>     *Subject:* Re: [msp430] Problems with IAR and programming
>
>
>
>     I haven't used a FET board for a while, but I recall thaqt several
>     of them used to have this issue if there was a slight difference
>     in Vcc levels, very slight. The same doesn't occur with the SBW
>     dongles, they live quite happily with joint supplies and a 0.6V
>     differecne in Vcc, though I wouldn't recommend this. I can't find
>     my FET documentation at the moment, but I seem to recall there was
>     a resistor you could change that would allow the FET board to
>     handle this.
>
>     Al
>
>     On 21/02/2015 3:42 PM, 'Peter Grey' [email protected]
>     <mailto:[email protected]> [msp430] wrote:
>
>         I have a target board with a MSP430FR5729. I am using IAR
>         EW6.5 and a MSP430-FETUIF. I have a MSP-TS430PW28 connected to
>         the FET module and 4 wires going to my target board (Vcc,
>         ground, Test, RST). I have used this sort of setup many times.
>         My target board has a 12V input and it generates 11volts to be
>         used on board to generate 3.3V and a few other DC voltages.
>         When I connect the cable from the PW28 board I can program the
>         board and run it. If I connect the 12 volts to my target board
>         the IAR crashes and I have to turn my PC off and on. When the
>         12V is not on the Vcc is 3.32V and if I have the 12V connected
>         and no FET the Vcc is 3.29V. I cannot see any shorts to ground
>         and the whole target board draws 17mA when no high power
>         devices are connected (3G modem). I can program in a led flash
>         and this will work with no 12V connected. If I remove the FET
>         and apply power the fled will flash. It seems the program runs
>         but it will not download the program when I have the 12V
>         connected. I checked the notes from TI and can see no hints as
>         to what is happening.
>
>         Any suggestions?
>
>         TIA
>
>         Peter
>
>
>
>
>
>
>
>
>
>
>