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Groups > comp.lang.forth > #45118 > unrolled thread
| Started by | Steve Graham <solitary.wanderer52@gmail.com> |
|---|---|
| First post | 2016-01-27 16:33 -0800 |
| Last post | 2016-02-05 21:01 +0000 |
| Articles | 20 on this page of 22 — 9 participants |
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Re: Installing gForth on the Raspberry Pi Steve Graham <solitary.wanderer52@gmail.com> - 2016-01-27 16:33 -0800
Re: Installing gForth on the Raspberry Pi Bernd Paysan <bernd.paysan@gmx.de> - 2016-01-28 02:14 +0100
Re: Installing gForth on the Raspberry Pi Paul Rubin <no.email@nospam.invalid> - 2016-01-27 17:16 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-01-27 21:01 -0500
Re: Installing gForth on the Raspberry Pi Paul Rubin <no.email@nospam.invalid> - 2016-01-27 19:20 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-01-27 23:02 -0500
Re: Installing gForth on the Raspberry Pi Paul Rubin <no.email@nospam.invalid> - 2016-01-27 22:12 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-01-28 02:12 -0500
Re: Installing gForth on the Raspberry Pi Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-01-27 23:34 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-01-28 02:40 -0500
Re: Installing gForth on the Raspberry Pi Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-01-28 04:24 -0800
Re: Installing gForth on the Raspberry Pi Paul Rubin <no.email@nospam.invalid> - 2016-01-28 00:15 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-01-28 03:24 -0500
Re: Installing gForth on the Raspberry Pi Paul Rubin <no.email@nospam.invalid> - 2016-01-28 00:35 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-02-05 16:27 -0500
Re: Installing gForth on the Raspberry Pi Mark Wills <markwills1970@gmail.com> - 2016-01-28 00:37 -0800
Re: Installing gForth on the Raspberry Pi Raimond Dragomir <raimond.dragomir@gmail.com> - 2016-01-28 04:13 -0800
Re: Installing gForth on the Raspberry Pi Mark Wills <markwills1970@gmail.com> - 2016-01-28 04:43 -0800
Re: Installing gForth on the Raspberry Pi rickman <gnuarm@gmail.com> - 2016-02-05 16:37 -0500
Re: Installing gForth on the Raspberry Pi Ron Aaron <rambamist@gmail.com> - 2016-01-28 08:12 +0200
Re: Installing gForth on the Raspberry Pi stephen@mpeforth.com (Stephen Pelc) - 2016-01-28 11:35 +0000
Re: Installing gForth on the Raspberry Pi Marcos Cruz <use_the_contact_page@programandala.net> - 2016-02-05 21:01 +0000
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| From | Steve Graham <solitary.wanderer52@gmail.com> |
|---|---|
| Date | 2016-01-27 16:33 -0800 |
| Subject | Re: Installing gForth on the Raspberry Pi |
| Message-ID | <1bb68a52-636d-429a-a490-7a44e4cf6c43@googlegroups.com> |
On Sunday, October 26, 2014 at 9:03:07 AM UTC-7, rickman wrote: > I have an rPi working on my desk and thought I would install gForth on > it. I found suggestions that this command should work... > > sudo apt-get install gforth > > But it didn't... :( Here are the error messages. Any suggestions? As > you can likely tell I am a complete noob with Linux. > > > pi@raspberrypi ~ $ sudo apt-get install gforth > Reading package lists... Done > Building dependency tree > Reading state information... Done > The following extra packages will be installed: > gforth-common gforth-lib libffcall1 > The following NEW packages will be installed: > gforth gforth-common gforth-lib libffcall1 > 0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded. > Need to get 979 kB of archives. > After this operation, 2,703 kB of additional disk space will be used. > Do you want to continue [Y/n]? y > Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main gforth-lib > armhf 0.7.0+ds1-7 > 404 Not Found > Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main > gforth-common all 0.7.0+ds1-7 > 404 Not Found > Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main gforth > armhf 0.7.0+ds1-7 > 404 Not Found > Get:1 http://mirrordirector.raspbian.org/raspbian/ wheezy/main > libffcall1 armhf 1.10+cvs20100619-2 [12.9 kB] > Fetched 12.9 kB in 1s (12.6 kB/s) > Failed to fetch > http://mirrordirector.raspbian.org/raspbian/pool/main/g/gforth/gforth-lib_0.7.0+ds1-7_armhf.deb > 404 Not Found > Failed to fetch > http://mirrordirector.raspbian.org/raspbian/pool/main/g/gforth/gforth-common_0.7.0+ds1-7_all.deb > 404 Not Found > Failed to fetch > http://mirrordirector.raspbian.org/raspbian/pool/main/g/gforth/gforth_0.7.0+ds1-7_armhf.deb > 404 Not Found > E: Unable to fetch some archives, maybe run apt-get update or try with > --fix-missing? > > -- > > Rick Did you ever get this working? Just got a RPi. Steve
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| From | Bernd Paysan <bernd.paysan@gmx.de> |
|---|---|
| Date | 2016-01-28 02:14 +0100 |
| Message-ID | <n8bptb$va5$1@dont-email.me> |
| In reply to | #45118 |
Steve Graham wrote: > Did you ever get this working? Just got a RPi. I've recently made a Debian repository for Gforth and net2o; it has the current snapshot (net2o won't run with the last stable release). Set it up that way: cat >/etc/apt/sources.list.d/net2o.list <<EOF deb http://net2o.de/debian testing main EOF wget -O - https://net2o.de/bernd@net2o.de.gpg.asc | apt-key add - This contains an armhf build, which should run on an RaspPi, and I'm looking for RaspPi users to actually test it. -- Bernd Paysan "If you want it done right, you have to do it yourself" net2o ID: kQusJzA;7*?t=uy@X}1GWr!+0qqp_Cn176t4(dQ* http://bernd-paysan.de/
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| From | Paul Rubin <no.email@nospam.invalid> |
|---|---|
| Date | 2016-01-27 17:16 -0800 |
| Message-ID | <87egd2sdua.fsf@jester.gateway.pace.com> |
| In reply to | #45118 |
Steve Graham <solitary.wanderer52@gmail.com> writes: > Did you ever get this working? Just got a RPi. Looks like the Raspian repo was missing gforth. No idea if it still is. But there's a working one in the regular Debian repos, and the Gforth guys here have said it's preferable to build from source because the Debian maintainers set it up with sub-optimal configuration options.
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-01-27 21:01 -0500 |
| Message-ID | <n8bsks$79a$1@dont-email.me> |
| In reply to | #45118 |
On 1/27/2016 7:33 PM, Steve Graham wrote: > On Sunday, October 26, 2014 at 9:03:07 AM UTC-7, rickman wrote: >> I have an rPi working on my desk and thought I would install gForth on >> it. I found suggestions that this command should work... >> >> sudo apt-get install gforth >> >> But it didn't... :( Here are the error messages. Any suggestions? As >> you can likely tell I am a complete noob with Linux. >> >> >> pi@raspberrypi ~ $ sudo apt-get install gforth >> Reading package lists... Done >> Building dependency tree >> Reading state information... Done >> The following extra packages will be installed: >> gforth-common gforth-lib libffcall1 >> The following NEW packages will be installed: >> gforth gforth-common gforth-lib libffcall1 >> 0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded. >> Need to get 979 kB of archives. >> After this operation, 2,703 kB of additional disk space will be used. >> Do you want to continue [Y/n]? y >> Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main gforth-lib >> armhf 0.7.0+ds1-7 >> 404 Not Found >> Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main >> gforth-common all 0.7.0+ds1-7 >> 404 Not Found >> Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main gforth >> armhf 0.7.0+ds1-7 >> 404 Not Found >> Get:1 http://mirrordirector.raspbian.org/raspbian/ wheezy/main >> libffcall1 armhf 1.10+cvs20100619-2 [12.9 kB] >> Fetched 12.9 kB in 1s (12.6 kB/s) >> Failed to fetch >> http://mirrordirector.raspbian.org/raspbian/pool/main/g/gforth/gforth-lib_0.7.0+ds1-7_armhf.deb >> 404 Not Found >> Failed to fetch >> http://mirrordirector.raspbian.org/raspbian/pool/main/g/gforth/gforth-common_0.7.0+ds1-7_all.deb >> 404 Not Found >> Failed to fetch >> http://mirrordirector.raspbian.org/raspbian/pool/main/g/gforth/gforth_0.7.0+ds1-7_armhf.deb >> 404 Not Found >> E: Unable to fetch some archives, maybe run apt-get update or try with >> --fix-missing? >> >> -- >> >> Rick > > Did you ever get this working? Just got a RPi. Yes, I did. I didn't do much forth with the pi. I was using it as a remote controller for an MCU development project. It had better support for the USB programming interface on the TI Stellaris. I have a new project now using the Fusion 2 Kickstart kit ***and*** a new rPi 2 which I need to get running. I still haven't gotten any of the rPi zero boards. I don't want to pay double with the shipping cost and Microcenter never seems to have stock. -- Rick
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| From | Paul Rubin <no.email@nospam.invalid> |
|---|---|
| Date | 2016-01-27 19:20 -0800 |
| Message-ID | <87a8nqs84e.fsf@jester.gateway.pace.com> |
| In reply to | #45121 |
rickman <gnuarm@gmail.com> writes: > I still haven't gotten any of the rPi zero boards. I don't want to > pay double with the shipping cost and Microcenter never seems to have > stock. It's not real clear what to do with a pi0 anyway, other than GPIO control-type applications that for some reason need a lot of compute or storage compared to normal embedded MCU's. Got any good ideas?
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-01-27 23:02 -0500 |
| Message-ID | <n8c3n4$nad$1@dont-email.me> |
| In reply to | #45122 |
On 1/27/2016 10:20 PM, Paul Rubin wrote: > rickman <gnuarm@gmail.com> writes: >> I still haven't gotten any of the rPi zero boards. I don't want to >> pay double with the shipping cost and Microcenter never seems to have >> stock. > > It's not real clear what to do with a pi0 anyway, other than GPIO > control-type applications that for some reason need a lot of compute or > storage compared to normal embedded MCU's. Got any good ideas? It's $5. That alone qualifies it for many projects over other devices. Are you not aware of the other useful aspects of the rPi? What type of projects do you have? -- Rick
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| From | Paul Rubin <no.email@nospam.invalid> |
|---|---|
| Date | 2016-01-27 22:12 -0800 |
| Message-ID | <8760yes050.fsf@jester.gateway.pace.com> |
| In reply to | #45123 |
rickman <gnuarm@gmail.com> writes: > It's $5. That alone qualifies it for many projects over other > devices. Are you not aware of the other useful aspects of the rPi? > What type of projects do you have? Not all that many, I'm not a hardware guy. Most hardware things I can think of need one or more of: - ethernet and/or wifi - realtime clock - very low power (much lower than rpi) - tiny (wearable) size - sub-millisecond deterministic timing (not a Linux strong point) - tons of cpu (makes pi2 much more attractive than pi0) - analog audio in/out (present on pi-A and pi2) - camera interface (but I don't like the Pi cameras) - etc. Yes you can add most of that stuff to the pi0 but the cost of the add-ons swamps the cpu board. A power adapter for a pi0 costs more by itself than the pi0 does. I'm sure the Pi0 is good for some things (robotics?) but they are somewhat niche even for embeded. Of course the $5 price can't be beat. So if you've got some cool application ideas, I'd be happy to hear them.
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-01-28 02:12 -0500 |
| Message-ID | <n8ceqt$gpr$3@dont-email.me> |
| In reply to | #45124 |
On 1/28/2016 1:12 AM, Paul Rubin wrote: > rickman <gnuarm@gmail.com> writes: >> It's $5. That alone qualifies it for many projects over other >> devices. Are you not aware of the other useful aspects of the rPi? >> What type of projects do you have? > > Not all that many, I'm not a hardware guy. Most hardware things I can > think of need one or more of: > > - ethernet and/or wifi > - realtime clock > - very low power (much lower than rpi) > - tiny (wearable) size > - sub-millisecond deterministic timing (not a Linux strong point) > - tons of cpu (makes pi2 much more attractive than pi0) > - analog audio in/out (present on pi-A and pi2) > - camera interface (but I don't like the Pi cameras) > - etc. > > Yes you can add most of that stuff to the pi0 but the cost of the > add-ons swamps the cpu board. A power adapter for a pi0 costs more by > itself than the pi0 does. > > I'm sure the Pi0 is good for some things (robotics?) but they are > somewhat niche even for embeded. Of course the $5 price can't be beat. > So if you've got some cool application ideas, I'd be happy to hear them. I'm still trying to picture your application that needs "very low power (much lower than rpi)" and more processing power than the rPi zero can provide. Actually I'm trying to picture how you could address both those needs in the same hardware. The rPi zero *is* tiny. If you need smaller you will have a hard time getting a high end CPU with Ethernet, etc in this tiny, tiny form factor. -- Rick
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| From | Raimond Dragomir <raimond.dragomir@gmail.com> |
|---|---|
| Date | 2016-01-27 23:34 -0800 |
| Message-ID | <68061ba6-5b99-4e1a-bc65-083a795cd1da@googlegroups.com> |
| In reply to | #45126 |
> I'm still trying to picture your application that needs "very low power > (much lower than rpi)" and more processing power than the rPi zero can > provide. Actually I'm trying to picture how you could address both > those needs in the same hardware. > > The rPi zero *is* tiny. If you need smaller you will have a hard time > getting a high end CPU with Ethernet, etc in this tiny, tiny form factor. > > -- > > Rick rPi 700Mhz, CoreMark=1303 (1.86/MHz) Atmel SAMV71 (Cortex-M7) 300MHz, CoreMark=1503 (5.01/MHz) STM32F7xx (Cortex-M7) 200MHz CoreMark=1001 (5.01/MHz)
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-01-28 02:40 -0500 |
| Message-ID | <n8cgfp$na0$1@dont-email.me> |
| In reply to | #45127 |
On 1/28/2016 2:34 AM, Raimond Dragomir wrote: >> I'm still trying to picture your application that needs "very low power >> (much lower than rpi)" and more processing power than the rPi zero can >> provide. Actually I'm trying to picture how you could address both >> those needs in the same hardware. >> >> The rPi zero *is* tiny. If you need smaller you will have a hard time >> getting a high end CPU with Ethernet, etc in this tiny, tiny form factor. >> >> -- >> >> Rick > > rPi 700Mhz, CoreMark=1303 (1.86/MHz) > Atmel SAMV71 (Cortex-M7) 300MHz, CoreMark=1503 (5.01/MHz) > STM32F7xx (Cortex-M7) 200MHz CoreMark=1001 (5.01/MHz) The rPi 2 is a quad core, faster than 700 MHz. These other devices are not boards. -- Rick
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| From | Raimond Dragomir <raimond.dragomir@gmail.com> |
|---|---|
| Date | 2016-01-28 04:24 -0800 |
| Message-ID | <b58c08eb-3e60-4676-b684-cb37406fee4b@googlegroups.com> |
| In reply to | #45128 |
joi, 28 ianuarie 2016, 09:40:19 UTC+2, rickman a scris: > On 1/28/2016 2:34 AM, Raimond Dragomir wrote: > >> I'm still trying to picture your application that needs "very low power > >> (much lower than rpi)" and more processing power than the rPi zero can > >> provide. Actually I'm trying to picture how you could address both > >> those needs in the same hardware. > >> > >> The rPi zero *is* tiny. If you need smaller you will have a hard time > >> getting a high end CPU with Ethernet, etc in this tiny, tiny form factor. > >> > >> -- > >> > >> Rick > > > > rPi 700Mhz, CoreMark=1303 (1.86/MHz) > > Atmel SAMV71 (Cortex-M7) 300MHz, CoreMark=1503 (5.01/MHz) > > STM32F7xx (Cortex-M7) 200MHz CoreMark=1001 (5.01/MHz) > > The rPi 2 is a quad core, faster than 700 MHz. These other devices are > not boards. > > -- > > Rick Yup, but rpi0 is the old core. You can make a little board with one of the other devices, something like rpi0 easily. You cannot easily make your own custom board with a broadcom cpu. The price is not everything. In industrial fields, rpi is hardly usable. Even in consumer products there are cases when it's not suitable: I have a project of a consumer product that can be done with a rpi0. Only that it works on batteries. With rpi it will last 10 hours full working, with a microcontroller will last 100+. I think standby time is even better although I don't know enough about standby power of an rpi/linux thing.
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| From | Paul Rubin <no.email@nospam.invalid> |
|---|---|
| Date | 2016-01-28 00:15 -0800 |
| Message-ID | <871t92rug9.fsf@jester.gateway.pace.com> |
| In reply to | #45126 |
rickman <gnuarm@gmail.com> writes: > I'm still trying to picture your application that needs "very low > power (much lower than rpi)" and more processing power than the rPi > zero can provide. Actually I'm trying to picture how you could > address both those needs in the same hardware. No, not both at the same time. "One or more of [feature list]" doesn't mean "all at the same time". I can think of various cpu-hungry apps and various low-power/wearable apps. It would be great to be able to have both at the same time (GA144?) but that's much more difficult. > The rPi zero *is* tiny. If you need smaller you will have a hard time > getting a high end CPU with Ethernet, etc in this tiny, tiny form > factor. By tiny I mean something like this: https://www.tiny-circuits.com/tiny-lily-mini-processor.html It doesn't have ethernet or a high end cpu, but it's small and low power.
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-01-28 03:24 -0500 |
| Message-ID | <n8cj37$ur7$1@dont-email.me> |
| In reply to | #45129 |
On 1/28/2016 3:15 AM, Paul Rubin wrote: > rickman <gnuarm@gmail.com> writes: >> I'm still trying to picture your application that needs "very low >> power (much lower than rpi)" and more processing power than the rPi >> zero can provide. Actually I'm trying to picture how you could >> address both those needs in the same hardware. > > No, not both at the same time. "One or more of [feature list]" doesn't > mean "all at the same time". I can think of various cpu-hungry apps and > various low-power/wearable apps. It would be great to be able to have > both at the same time (GA144?) but that's much more difficult. > >> The rPi zero *is* tiny. If you need smaller you will have a hard time >> getting a high end CPU with Ethernet, etc in this tiny, tiny form >> factor. > > By tiny I mean something like this: > > https://www.tiny-circuits.com/tiny-lily-mini-processor.html > > It doesn't have ethernet or a high end cpu, but it's small and low > power. Yes, there are many, many different MCUs with a wide variety of capabilities. None have all capabilities. No processor will do everything. -- Rick
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| From | Paul Rubin <no.email@nospam.invalid> |
|---|---|
| Date | 2016-01-28 00:35 -0800 |
| Message-ID | <87wpquqexz.fsf@jester.gateway.pace.com> |
| In reply to | #45130 |
rickman <gnuarm@gmail.com> writes: > Yes, there are many, many different MCUs with a wide variety of > capabilities. None have all capabilities. No processor will do > everything. Right, I was involved with something a few years ago that used a Glomation ARM board with ethernet, and an Rpi2 (not available then), Odroid, Beaglebone etc. would have been great for that as well. At the other end there are those tiny MCU things, also useful. In between is the Pi0 and I still haven't figured out a good use for one. The GA144 was sort of similar, only more so.
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-02-05 16:27 -0500 |
| Message-ID | <n933vc$mmk$1@dont-email.me> |
| In reply to | #45132 |
On 1/28/2016 3:35 AM, Paul Rubin wrote: > rickman <gnuarm@gmail.com> writes: >> Yes, there are many, many different MCUs with a wide variety of >> capabilities. None have all capabilities. No processor will do >> everything. > > Right, I was involved with something a few years ago that used a > Glomation ARM board with ethernet, and an Rpi2 (not available then), > Odroid, Beaglebone etc. would have been great for that as well. At the > other end there are those tiny MCU things, also useful. In between is > the Pi0 and I still haven't figured out a good use for one. The GA144 > was sort of similar, only more so. No comparison whatsoever!!! The GA144 could have a few useful apps if some tools were available for it. The stuff available for the GA144 is a bit like handing someone a bucket and shovel at the beach when they want a semiconductor chip. The rPi zero is a perfectly usable board for a variety of projects. If you prefer something programmed at a lower level, that's fine. Many like to program with the full support of an OS on the target. -- Rick
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| From | Mark Wills <markwills1970@gmail.com> |
|---|---|
| Date | 2016-01-28 00:37 -0800 |
| Message-ID | <2d22a25c-2450-4218-9087-dd6d0a78b186@googlegroups.com> |
| In reply to | #45126 |
On Thursday, 28 January 2016 07:12:07 UTC, rickman wrote: > On 1/28/2016 1:12 AM, Paul Rubin wrote: > > rickman <gnuarm@gmail.com> writes: > >> It's $5. That alone qualifies it for many projects over other > >> devices. Are you not aware of the other useful aspects of the rPi? > >> What type of projects do you have? > > > > Not all that many, I'm not a hardware guy. Most hardware things I can > > think of need one or more of: > > > > - ethernet and/or wifi > > - realtime clock > > - very low power (much lower than rpi) > > - tiny (wearable) size > > - sub-millisecond deterministic timing (not a Linux strong point) > > - tons of cpu (makes pi2 much more attractive than pi0) > > - analog audio in/out (present on pi-A and pi2) > > - camera interface (but I don't like the Pi cameras) > > - etc. > > > > Yes you can add most of that stuff to the pi0 but the cost of the > > add-ons swamps the cpu board. A power adapter for a pi0 costs more by > > itself than the pi0 does. > > > > I'm sure the Pi0 is good for some things (robotics?) but they are > > somewhat niche even for embeded. Of course the $5 price can't be beat. > > So if you've got some cool application ideas, I'd be happy to hear them. > > I'm still trying to picture your application that needs "very low power > (much lower than rpi)" and more processing power than the rPi zero can > provide. Actually I'm trying to picture how you could address both > those needs in the same hardware. > > The rPi zero *is* tiny. If you need smaller you will have a hard time > getting a high end CPU with Ethernet, etc in this tiny, tiny form factor. > > -- > > Rick Agreed. We've pretty much reached the point where it's not worth designing custom hardware for a project, unless there's a pressing design constraint such as very low power or something like that. I can buy a rPi0 for less than it would cost to get a prototype run of PCB boards. It's just not worth it.
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| From | Raimond Dragomir <raimond.dragomir@gmail.com> |
|---|---|
| Date | 2016-01-28 04:13 -0800 |
| Message-ID | <d6fb6574-93c0-4b19-b09d-ea5369a1cf83@googlegroups.com> |
| In reply to | #45133 |
> Agreed. We've pretty much reached the point where it's not worth > designing custom hardware for a project, unless there's a pressing > design constraint such as very low power or something like that. > I can buy a rPi0 for less than it would cost to get a prototype > run of PCB boards. It's just not worth it. Being a hardware engineer for 20 years, working in industrial fields mainly, I cannot agree with this.
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| From | Mark Wills <markwills1970@gmail.com> |
|---|---|
| Date | 2016-01-28 04:43 -0800 |
| Message-ID | <8e8a7b5d-9173-4aed-bdec-1055a51b79e8@googlegroups.com> |
| In reply to | #45141 |
On Thursday, 28 January 2016 12:13:24 UTC, Raimond Dragomir wrote: > > Agreed. We've pretty much reached the point where it's not worth > > designing custom hardware for a project, unless there's a pressing > > design constraint such as very low power or something like that. > > I can buy a rPi0 for less than it would cost to get a prototype > > run of PCB boards. It's just not worth it. > > Being a hardware engineer for 20 years, working in industrial fields mainly, > I cannot agree with this. In industrial areas, I'd tend to agree with you. I have a particular interest in functional safety systems, and I see Forth as being ideal for functional safety, as it's relatively simple to validate a Forth application, since there's very little underneath it. So, for an industrial application such as an ESD system on a pipeline, purpose designed hardware running Forth is perfect. For this, a PI would not be the first choice: there's a huge OS and proprietary libraries which cannot be validated (the only defence would be 'proven in use'). However, most industrial systems have a communications interface that allows the unit(s) to communicate with a SCADA system or something similar. In days gone by, these were serial systems and were relatively simple. These days, they tend to be TCP/IP based, and may be internet facing. A rPI would be the ideal device to sit between the SCADA system and the device running the SIF (Safeety Instrumented Function). The hardware/software running on the PI would not need to be validated, since it could fail and the safety system would carry on doing its job. So, yes, I could (and do) see a use for custom hardware for situations such as the above, but I would use cheap units such as a PI where I could. Another constraint might be environmental: Some installations I've worked on have requirements to work over very wide temperature ranges (in Kazakhstan our kit had to work at -40 and +40 degrees C) and a PI, which is a domestic unit, might not be suitable. Would have to put one in a freezer for a week and see!
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| From | rickman <gnuarm@gmail.com> |
|---|---|
| Date | 2016-02-05 16:37 -0500 |
| Message-ID | <n934i6$os5$1@dont-email.me> |
| In reply to | #45141 |
On 1/28/2016 7:13 AM, Raimond Dragomir wrote: >> Agreed. We've pretty much reached the point where it's not worth >> designing custom hardware for a project, unless there's a pressing >> design constraint such as very low power or something like that. >> I can buy a rPi0 for less than it would cost to get a prototype >> run of PCB boards. It's just not worth it. > > Being a hardware engineer for 20 years, working in industrial fields mainly, > I cannot agree with this. Depends entirely on your project. I was discussing with a customer an application for a generic user control box which would contain an SBC a few push buttons and a graphic display. I can see no reason to design a PCB for that. I would use an industrial temperature BBB which is fully qualified for the requirements. If your requirements do not include wider temperatures, the rPi zero would do just fine. -- Rick
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| From | Ron Aaron <rambamist@gmail.com> |
|---|---|
| Date | 2016-01-28 08:12 +0200 |
| Message-ID | <n8cbbq$a5p$1@dont-email.me> |
| In reply to | #45123 |
On 28/01/2016 06:02, rickman wrote: > It's $5. That alone qualifies it for many projects over other devices. > Are you not aware of the other useful aspects of the rPi? What type of > projects do you have? 8th runs on the RPI, if that's of interest
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