[sdiy] ARM Dev Boards Possibly Lunatic Idea

[rsdio at audiobanshee.com]

I took a quick look at the Sparkfun Eagle files, and there is a 10-pin JTAG port with all the required signal for programming. Whenever you see TDI, TDO, TCK, TMS and !RESET, that's most likely a JTAG programming port. The other signals are 3.3V, three Grounds, and an empty pin for a Key. By the way, all of the JTAG signals connect to the ATMEL chip. I'm looking at the Eagle Board file.

Maybe that's what you mean by a FTDI port, but the JTAG standard goes way beyond the FTDI Chip company.

Brian

p.s. That's a cool, hand-held "jig" Richie!


On May 12, 2017, at 2:34 PM, Richie Burnett wrote:
> I've had success with using this type of improvised "programming pen" for in-circuit microcontroller programming before.
> 
> http://www.electricstuff.co.uk/penprobe.html
> 
> -Richie,
> 
> -----Original Message----- From: Scott Gravenhorst
> Sent: Friday, May 12, 2017 10:22 PM
> To: synth-diy at synth-diy.org
> Subject: Re: [sdiy] ARM Dev Boards Possibly Lunatic Idea
> 
> No idea, other than the FTDI port, I don't see a connection that hooks to the appropriate pins on
> the ARM to do (for example) parallel programming of the Flash - there are no connections to the
> required pins for that.  JTAG pins aren't connected.  From what I see (and I could be "blind"), the
> only way they could have done it is via FTDI or possibly using a socket that accepts the SMD part,
> program it first and then solder it, but that seems a bit labor intensive to me.  The datasheet
> lays out (I believe) 4 methods of programming the Flash, and the schematic didn't seem to support
> any except for FTDI.  Note though that the FTDI port was just .1" spaces holes into which pins
> could be soldered, but the board comes with nothing soldered there.  I suppose it would be easy
> enough to deal with that using some clip-thingies.
> 
> And that's why I'm asking this question here.
> 
> MTG <grant at musictechnologiesgroup.com> wrote:
>> How did the developer do it?  There must be some kind of ISP connection
>> on the board.
>> 
>> On 5/12/2017 12:29 PM, Scott Gravenhorst wrote:
>>> 
>>> Here's a possibly lunatic idea I've been mulling for awhile.
>>> 
>>> I was thinking that the Tsunami Super WAV Trigger Board has essentially everything I'd
>>> want on a dev board, including the Microchip (Atmel) ATSAMS70N20 ARM (and again, the
>>> only reason I'm interested in that particular chip is that the speed is almost 40%
>>> higher than the STmicro ones).
>>> 
>>> What I first wondered is whether it would be possible to completely replace the program
>>> in it.  There is a firmware update function, but I doubt if that _completely_ erases and
>>> replaces the code.  If I'm not mistaken (from looking at the schemo and reading the
>>> datasheet) I might be able to program the board through the FTDI port on the board.
>>> However, I'm not sure, so maybe someone here has advice.  Anyway, my whole idea was to
>>> buy a second WAV trigger and blow out the WAV trigger program and replace it with my own
>>> designs - and use it as a dev board.  It's a bit more expensive than the other
>>> selections we've discussed, but failing finding a dev board for ATSAMS70N20, if that
>>> could actually work, I wouldn't mind spending the money.  The development platform for
>>> the Microchip/Atmel parts is Atmel Studio, which itself is free, but I don't know if as
>>> you use it you find that it needs bits and pieces that cost money - can anyone say if
>>> that is true or not?
>>> 
>>> So is this total lunacy?
>