November 2023 - pacsat-dev - mailman.amsat.org

Re: Pacsat dev mtg 11/30/2023
by Burns Fisher (AMSAT) 30 Nov '23

30 Nov '23

I may be late. Another mtg one hour before. 73, Burns Fisher, WB1FJ *AMSAT(R) Engineering -- Flight Software* On Thu, Nov 30, 2023 at 1:34 PM Bill via pacsat-dev <pacsat-dev(a)amsat.org> wrote: > Pacsat dev mtg 11/30/2023 > Thu, Nov 30, 2023 7:00 PM - 9:00 PM (CST) > > Please join my meeting from your computer, tablet or smartphone. > > https://meet.goto.com/702692373 > > You can also dial in using your phone. > (For supported devices, tap a one-touch number below to join instantly.) > > United States: +1 (872) 240-3212 > - One-touch: tel:+18722403212,,702692373# > > Access Code: 702-692-373 > > Join from a video-conferencing room or system. > Dial in or type: 67.217.95.2 or inroomlink.goto.com > Meeting ID: 702 692 373 > Or dial directly: 702692373(a)67.217.95.2 or 67.217.95.2##702692373 > > > Get the app now and be ready when your first meeting starts: > https://meet.goto.com/install > > > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Pacsat dev mtg 11/30/2023
by Bill 30 Nov '23

30 Nov '23

Pacsat dev mtg 11/30/2023 Thu, Nov 30, 2023 7:00 PM - 9:00 PM (CST) Please join my meeting from your computer, tablet or smartphone. https://meet.goto.com/702692373 You can also dial in using your phone. (For supported devices, tap a one-touch number below to join instantly.) United States: +1 (872) 240-3212 - One-touch: tel:+18722403212,,702692373# Access Code: 702-692-373 Join from a video-conferencing room or system. Dial in or type: 67.217.95.2 or inroomlink.goto.com Meeting ID: 702 692 373 Or dial directly: 702692373(a)67.217.95.2 or 67.217.95.2##702692373 Get the app now and be ready when your first meeting starts: https://meet.goto.com/install

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Re: TMS570 - Pullup value
by Bob Stricklin 20 Nov '23

20 Nov '23

This is fine for a start up and initial testing. Bob On Nov 20, 2023, at 8:34 AM, Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org<mailto:[email protected]>> wrote: Bob, The pullup is intended to be weak so says the linked reference. About 165k. Designed for 20ua pull. https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-grou… Jim McCullers WA4CWI ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org<mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org<mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org<https://mailman.amsat.org/>

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TMS570 - Pullup value
by Jim McCullers 20 Nov '23

20 Nov '23

Bob, The pullup is intended to be weak so says the linked reference. About 165k. Designed for 20ua pull. https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group /arm-based-microcontrollers/f/arm-based-microcontrollers-forum/914671/tms570 ls3137-tms570ls3137-reset-state-pull-up-down-values-for-tms570 Jim McCullers WA4CWI

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Re: Pullups/Pulldowns
by Jim McCullers 19 Nov '23

19 Nov '23

Agree on all points. Jim Jim, I said earlier “you”and I should have said “we”… Yes, these issues will go through changes and false starts. May need to disable most IRQ lines in the beginning. Yes, and my sheet is going to have issues. I got to thinking later that I did not label the I2C clock as a CLK. Have not gone back to look yet. I like and agree with what Burns said, once we get this all working we probably will not have to touch it any more. Temperature testing will be needed to be sure things work properly. We may also find the pull-up they have on chip is not enough and have to add a pull-up or pull down to the board. I think I have most of them covered but may have missed something. On the lines going to the PC104 I don’t know what is really going to be needed there without a lot more study on the interface. So i just made them inputs mostly to be safe. These lines should all be buffered but I did not want to add the additional chips and current. Careful coordination with others should be the solution but a lot of work there. We can address it later. I think the main goal is to get the CPU working and then test the radios, clock, and WDT etc. Bob On Nov 19, 2023, at 9:24 AM, Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org <mailto:[email protected]> > wrote: Bob, Thanks. I’ll look at the 570 data sheet and see what it says about pullup resistance. An input can be configured with either a pullup, pulldown or nothing. Want to start a group pool to bet on how many iterations it will take to get the configuration correct? Not that difficult but easy to loose ones place going between your pin chart and the HCG settings. 73, Jim McCullers WA4CWI Jim, Yes need to be sure the pull ups are enabled on these IRQ lines which will be inputs. Ok to have pull ups on all inputs. If we have a problem meeting the Vol input level we can disable later. Pull-ups are probably a high resistance, maybe 100K? I have several external pull ups and a few pull downs. POR could be a special case but we can start with pull-up. Bob On Nov 19, 2023, at 7:07 AM, Burns Fisher (AMSAT) via pacsat-dev <pacsat-dev(a)amsat.org <mailto:[email protected]> > wrote: You should double check this but I seem to remember that the internal pull-up/downs only work for INPUTS. Not sure if for example they would work on i2c. FWIW On Sat, Nov 18, 2023 at 10:41 PM Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org <mailto:[email protected]> > wrote: Bob, In the last column labeled Pullup/Down does “Add on chip pullup” mean set the pullup with the HCG configuration? My assumption is yes but wanted to crosscheck before defining. The configurator assigns a pullup to all inputs by default. If not required I assumption they will need to be manually reset in HCG. Thanks Jim McCullers WA4CWI ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org <mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org <mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org <https://mailman.amsat.org/> ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org <mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org <mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org <https://mailman.amsat.org/> ----------------------------------------------------------- pacsat-dev mailing list -- <mailto:[email protected]> pacsat-dev(a)amsat.org View archives of this mailing list at <https://mailman.amsat.org/hyperkitty/list/[email protected]> https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to <mailto:[email protected]> pacsat-dev-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at <https://mailman.amsat.org/> https://mailman.amsat.org

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Re: Pullups/Pulldowns
by Bob Stricklin 19 Nov '23

19 Nov '23

Jim, I said earlier “you”and I should have said “we”… Yes, these issues will go through changes and false starts. May need to disable most IRQ lines in the beginning. Yes, and my sheet is going to have issues. I got to thinking later that I did not label the I2C clock as a CLK. Have not gone back to look yet. I like and agree with what Burns said, once we get this all working we probably will not have to touch it any more. Temperature testing will be needed to be sure things work properly. We may also find the pull-up they have on chip is not enough and have to add a pull-up or pull down to the board. I think I have most of them covered but may have missed something. On the lines going to the PC104 I don’t know what is really going to be needed there without a lot more study on the interface. So i just made them inputs mostly to be safe. These lines should all be buffered but I did not want to add the additional chips and current. Careful coordination with others should be the solution but a lot of work there. We can address it later. I think the main goal is to get the CPU working and then test the radios, clock, and WDT etc. Bob On Nov 19, 2023, at 9:24 AM, Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org<mailto:[email protected]>> wrote: Bob, Thanks. I’ll look at the 570 data sheet and see what it says about pullup resistance. An input can be configured with either a pullup, pulldown or nothing. Want to start a group pool to bet on how many iterations it will take to get the configuration correct? Not that difficult but easy to loose ones place going between your pin chart and the HCG settings. 73, Jim McCullers WA4CWI Jim, Yes need to be sure the pull ups are enabled on these IRQ lines which will be inputs. Ok to have pull ups on all inputs. If we have a problem meeting the Vol input level we can disable later. Pull-ups are probably a high resistance, maybe 100K? I have several external pull ups and a few pull downs. POR could be a special case but we can start with pull-up. Bob On Nov 19, 2023, at 7:07 AM, Burns Fisher (AMSAT) via pacsat-dev <pacsat-dev(a)amsat.org<mailto:[email protected]>> wrote: You should double check this but I seem to remember that the internal pull-up/downs only work for INPUTS. Not sure if for example they would work on i2c. FWIW On Sat, Nov 18, 2023 at 10:41 PM Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org<mailto:[email protected]>> wrote: Bob, In the last column labeled Pullup/Down does “Add on chip pullup” mean set the pullup with the HCG configuration? My assumption is yes but wanted to crosscheck before defining. The configurator assigns a pullup to all inputs by default. If not required I assumption they will need to be manually reset in HCG. Thanks Jim McCullers WA4CWI ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org<mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org<mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org<https://mailman.amsat.org/> ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org<mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org<mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org<https://mailman.amsat.org/> ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org<mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org<mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org<https://mailman.amsat.org/>

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Re: Pullups/Pulldowns
by Jim McCullers 19 Nov '23

19 Nov '23

Bob, Thanks. I’ll look at the 570 data sheet and see what it says about pullup resistance. An input can be configured with either a pullup, pulldown or nothing. Want to start a group pool to bet on how many iterations it will take to get the configuration correct? Not that difficult but easy to loose ones place going between your pin chart and the HCG settings. 73, Jim McCullers WA4CWI Jim, Yes need to be sure the pull ups are enabled on these IRQ lines which will be inputs. Ok to have pull ups on all inputs. If we have a problem meeting the Vol input level we can disable later. Pull-ups are probably a high resistance, maybe 100K? I have several external pull ups and a few pull downs. POR could be a special case but we can start with pull-up. Bob On Nov 19, 2023, at 7:07 AM, Burns Fisher (AMSAT) via pacsat-dev <pacsat-dev(a)amsat.org <mailto:[email protected]> > wrote: You should double check this but I seem to remember that the internal pull-up/downs only work for INPUTS. Not sure if for example they would work on i2c. FWIW On Sat, Nov 18, 2023 at 10:41 PM Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org <mailto:[email protected]> > wrote: Bob, In the last column labeled Pullup/Down does “Add on chip pullup” mean set the pullup with the HCG configuration? My assumption is yes but wanted to crosscheck before defining. The configurator assigns a pullup to all inputs by default. If not required I assumption they will need to be manually reset in HCG. Thanks Jim McCullers WA4CWI ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org <mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org <mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org <mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org <mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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Re: Pullups/Pulldowns
by Burns Fisher (AMSAT) 19 Nov '23

19 Nov '23

You should double check this but I seem to remember that the internal pull-up/downs only work for INPUTS. Not sure if for example they would work on i2c. FWIW On Sat, Nov 18, 2023 at 10:41 PM Jim McCullers via pacsat-dev < pacsat-dev(a)amsat.org> wrote: > Bob, > > > > In the last column labeled Pullup/Down does “Add on chip pullup” mean set > the pullup with the HCG configuration? > > My assumption is yes but wanted to crosscheck before defining. > > > > The configurator assigns a pullup to all inputs by default. > > If not required I assumption they will need to be manually reset in HCG. > > > > > > Thanks > > > > Jim McCullers > > WA4CWI > > ----------------------------------------------------------- > > pacsat-dev mailing list -- pacsat-dev(a)amsat.org > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/[email protected] > To unsubscribe send an email to pacsat-dev-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org >

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Re: Pullups/Pulldowns
by Bob Stricklin 19 Nov '23

19 Nov '23

Jim, Yes need to be sure the pull ups are enabled on these IRQ lines which will be inputs. Ok to have pull ups on all inputs. If we have a problem meeting the Vol input level we can disable later. Pull-ups are probably a high resistance, maybe 100K? I have several external pull ups and a few pull downs. POR could be a special case but we can start with pull-up. Bob On Nov 19, 2023, at 7:07 AM, Burns Fisher (AMSAT) via pacsat-dev <pacsat-dev(a)amsat.org> wrote: You should double check this but I seem to remember that the internal pull-up/downs only work for INPUTS. Not sure if for example they would work on i2c. FWIW On Sat, Nov 18, 2023 at 10:41 PM Jim McCullers via pacsat-dev <pacsat-dev(a)amsat.org<mailto:[email protected]>> wrote: Bob, In the last column labeled Pullup/Down does “Add on chip pullup” mean set the pullup with the HCG configuration? My assumption is yes but wanted to crosscheck before defining. The configurator assigns a pullup to all inputs by default. If not required I assumption they will need to be manually reset in HCG. Thanks Jim McCullers WA4CWI ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org<mailto:[email protected]> View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org<mailto:[email protected]> Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org ----------------------------------------------------------- pacsat-dev mailing list -- pacsat-dev(a)amsat.org View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to pacsat-dev-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org

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Pullups/Pulldowns
by Jim McCullers 19 Nov '23

19 Nov '23

Bob, In the last column labeled Pullup/Down does "Add on chip pullup" mean set the pullup with the HCG configuration? My assumption is yes but wanted to crosscheck before defining. The configurator assigns a pullup to all inputs by default. If not required I assumption they will need to be manually reset in HCG. Thanks Jim McCullers WA4CWI

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