I have some larger MRAM chips that I got earlier in the project when I was going to make a small prototype board. Burns had supplied the instructions. Then Rich sent me one so I forgot about it.
I have 4 but I am nervous to try to replace the ones on the booster board in case I can't get it to work again! I do have a hot air soldering station and did lift and replace two of the AX5043s, so perhaps it is not beyond my skill. But I may wait until I have finished any other code changes needed for symposium.
73 Chris
On Fri, Aug 25, 2023, 13:26 Burns Fisher (AMSAT) via pacsat-dev < pacsat-dev@amsat.org> wrote:
That seems reasonable since Jonathan likes to spend money. And it is not that much anyway, as such things go.
I believe that the (base) software should automatically support larger MRAMs since I first developed that part of it on a breadboard with a larger MRAM. However, I only had a single chip on that breadboard, so no guarantee, I'd be happy to be the guinea pig, at least once I get the I2c driver fixed up.
73,
Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software*
On Fri, Aug 25, 2023 at 1:17 PM Jim McCullers via pacsat-dev < pacsat-dev@amsat.org> wrote:
At Thursday night’s meeting Chris brought up having more MRAM on future boards.
The daughter board uses four smaller capacity chips due to the number required for the six boards created.
The MRAM chips on the current board can be replaced but it will have to be done using a heat gun due to the pin characteristics of the chips.
We could do some board swapping as no spares exist and I can replace the modules and test this time as we have capable software.
One meg (128x8) regular chips (non-automotive/flight) cost approximately $10 each and four meg (512kx8) are approximately $21 each in single lots.
Discounts start at purchases of 10 but are not that substantial.
Jim McCullers
WA4CWI
pacsat-dev mailing list -- pacsat-dev@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org To unsubscribe send an email to pacsat-dev-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
pacsat-dev mailing list -- pacsat-dev@amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/pacsat-dev@amsat.org To unsubscribe send an email to pacsat-dev-leave@amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
participants (1)
-
Chris Thompson