Suggested order for Pacsat devos
Hi Jonathan,
I'm thinking that if we want to write software before we are producing any boards, that a few more devices to attach to the Launchpad processor eval board would be good.
We have the AX5043 boards that you designed which (at this point) I am assuming can be connected (Chris is currently attempting that). But what we don't have is an MRAM except for the one board that Zach designed and RIch has used (Chris has that now, and it works).
We can get an MRAM on a DIP board for use in a solderless breadboard from Proto Advantage. This would require jumpers from the LaunchPad to the solderless breadboard and to the AX5043 board. Here is an example:
*http://www.proto-advantage.com/store/shopping_cart.php?cartnum=8cc208e06c96d... http://www.proto-advantage.com/store/shopping_cart.php?cartnum=8cc208e06c96db*
Another possibility is to design a pretty simple little board that would plug onto a Launchpad and would have both an MRAM and either a soldered-on 5043 or a place pins/sockets for a Jonathan-5043-board.
What do you think?
Hope you had a good trip to the cape!
73,
Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software*
On 11/28/22 17:41, Burns Fisher (AMSAT) wrote:
We have the AX5043 boards that you designed which (at this point) I am assuming can be connected (Chris is currently attempting that).
Yes, I have definitely jumpered the AX5043 board to a Launchpad in my past so I'm pretty comfortable with that.
We can get an MRAM on a DIP board for use in a solderless breadboard from Proto Advantage. This would require jumpers from the LaunchPad to the solderless breadboard and to the AX5043 board. Here is an example:
Similarly, while I haven't done this with an MRAM module, I have jumpered an FRAM module to a Launchpad-like device. In my case, I had multiple devices so was using a solderless breadboard. Given the relatively slow speeds of the communication channel between the devices the jumpers and solderless breadboard seemed reasonable.
As for applicability for Pacsat, I'm not entirely familiar with the tradeoffs so will necessarily defer to Bill and the rest of the team.
Jonathan
Just a couple thoughts:
Having had a lot of experience with flat-satting Foxes and Golfs, I can tell you that jumpering stuff is a PITA and is easy to mess up and hard to move around. That's one reason I suggested maybe making a small board to fit on the Launchpad.
The other thing is that the MRAMs are leadless. I don't see us being able to do anything with them without them being soldered onto a board like the proto-advantage adapter or a specially-designed board.
Bill, or anyone else--opinions welcome.
73,
Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software*
On Mon, Nov 28, 2022 at 9:16 PM Jonathan Brandenburg via pacsat-dev < pacsat-dev@amsat.org> wrote:
On 11/28/22 17:41, Burns Fisher (AMSAT) wrote:
We have the AX5043 boards that you designed which (at this point) I am assuming can be connected (Chris is currently attempting that).
Yes, I have definitely jumpered the AX5043 board to a Launchpad in my past so I'm pretty comfortable with that.
We can get an MRAM on a DIP board for use in a solderless breadboard from Proto Advantage. This would require jumpers from the LaunchPad to the solderless breadboard and to the AX5043 board. Here is an example:
Similarly, while I haven't done this with an MRAM module, I have jumpered an FRAM module to a Launchpad-like device. In my case, I had multiple devices so was using a solderless breadboard. Given the relatively slow speeds of the communication channel between the devices the jumpers and solderless breadboard seemed reasonable.
As for applicability for Pacsat, I'm not entirely familiar with the tradeoffs so will necessarily defer to Bill and the rest of the team.
Jonathan
-- Jonathan Brandenburg Radio Amateur Satellite Corporation 1-214-213-1066
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Jonathan Brandenburg