Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> writes:> The Renesas RZ comes close, up to 10MB on-chip RAM. But no flash, just > add a tiny QSPI FLASH. Never used them, but they look interesting.You also need an MMU, and doing a Linux port if there's not already one is a substantial task. Plus it's a pretty expensive part IIRC. Also the OP wants to use a binary-only library so it's unclear what CPUs it's available for. Might be ARM-only. If not, there are some cheap Ingenic MIPS-based chips that run Linux. See the hardware for the Ben Nanonote though it's dated by now.
Minimal and low-cost embedded Linux
Started by ●December 9, 2015
Reply by ●December 10, 20152015-12-10
Reply by ●December 10, 20152015-12-10
Il 10/12/2015 09:11, Paul Rubin ha scritto:> [...]> This means porting to a minimal bare> metal system might be messy and not gain you much.I don't understand why you arrived to this conclusion.
Reply by ●December 10, 20152015-12-10
On 2015-12-10 Paul Rubin wrote in comp.arch.embedded:> Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> writes: >> The Renesas RZ comes close, up to 10MB on-chip RAM. But no flash, just >> add a tiny QSPI FLASH. Never used them, but they look interesting. > > You also need an MMU, and doing a Linux port if there's not already one > is a substantial task. Plus it's a pretty expensive part IIRC. >Ah, yes no MMU, forgot about that, sorry. No not cheap IIRC as well. The RZ/G does have MMU, but than the on-chip RAM advantage of the RZ/A is gone.> Also the OP wants to use a binary-only library so it's unclear what CPUs > it's available for. Might be ARM-only. If not, there are some cheap > Ingenic MIPS-based chips that run Linux. See the hardware for the Ben > Nanonote though it's dated by now.The RZ/A is a Cortex-A9 so that should not be a problem. -- Stef (remove caps, dashes and .invalid from e-mail address to reply by mail) The American Dental Association announced today that most plaque tends to form on teeth around 4:00 PM in the afternoon. Film at 11:00.
Reply by ●December 10, 20152015-12-10
Il 10/12/2015 10:00, Paul Rubin ha scritto:> Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> writes: >> The Renesas RZ comes close, up to 10MB on-chip RAM. But no flash, just >> add a tiny QSPI FLASH. Never used them, but they look interesting. > > You also need an MMU, and doing a Linux port if there's not already one > is a substantial task. Plus it's a pretty expensive part IIRC. > > Also the OP wants to use a binary-only library so it's unclear what CPUs > it's available for. Might be ARM-only. If not, there are some cheap > Ingenic MIPS-based chips that run Linux. See the hardware for the Ben > Nanonote though it's dated by now.It is available only as SDK (binaries) for ARM Linux/Android (and Intel, Windows, ...)
Reply by ●December 10, 20152015-12-10
There is a commercial arm (lower case) to Raspberry which will respin the PIs to your form factor etc so yes, they will sell into products. Colin
Reply by ●December 10, 20152015-12-10
Il giorno gioved� 10 dicembre 2015 12:52:24 UTC+1, colin_...@yahoo.com ha scritto:> There is a commercial arm (lower case) to Raspberry which will respin the PIs to your form factor etc so yes, they will sell into products. > > Colingood to know. Bye Jack
Reply by ●December 10, 20152015-12-10
On Thu, 10 Dec 2015 01:00:21 -0800, Paul Rubin <no.email@nospam.invalid> wrote:>Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> writes: >> The Renesas RZ comes close, up to 10MB on-chip RAM. But no flash, just >> add a tiny QSPI FLASH. Never used them, but they look interesting. > >You also need an MMU, and doing a Linux port if there's not already one >is a substantial task. Plus it's a pretty expensive part IIRC.Agreed wrt porting to a new architecture. However ... On most supported architectures, the kernel runs fine without MMU. All you need to do to try it is rebuild with one setting change: CONFIG_MMU=n However, this setting is hidden: it's not in the build config menu - you have to edit the .config file directly. The kernel itself works ... the problem is that far too many other things are likely to break. George
Reply by ●December 10, 20152015-12-10
On 10.12.15 20:24, George Neuner wrote:> On Thu, 10 Dec 2015 01:00:21 -0800, Paul Rubin > <no.email@nospam.invalid> wrote: > >> Stef <stef33d@yahooI-N-V-A-L-I-D.com.invalid> writes: >>> The Renesas RZ comes close, up to 10MB on-chip RAM. But no flash, just >>> add a tiny QSPI FLASH. Never used them, but they look interesting. >> >> You also need an MMU, and doing a Linux port if there's not already one >> is a substantial task. Plus it's a pretty expensive part IIRC. > > Agreed wrt porting to a new architecture. However ... > > On most supported architectures, the kernel runs fine without MMU. All > you need to do to try it is rebuild with one setting change: > CONFIG_MMU=n > > However, this setting is hidden: it's not in the build config menu - > you have to edit the .config file directly. > > The kernel itself works ... the problem is that far too many other > things are likely to break. > > GeorgeThe first thing coming to mind is mapping shared libraries. You have to re-build a bunch of helper programs and end up with ucLinux. -- -TV
Reply by ●December 12, 20152015-12-12
Den torsdag den 10. december 2015 kl. 02.02.18 UTC+1 skrev rickman:> On 12/9/2015 6:51 PM, pozz wrote: > > I don't strictly need a full Linux OS, but I have to use a third-party > > SDK released only for this OS (it is a commercial TTS engine solution). > > > > What is the minimal hw platform that runs a full Linux (not uClinux)? Is > > there a single-chip (integrated Flash and RAM) solution? I don't think. > > What is the simplest and lowes cost solution for a medium volume > > production (1000pcs)? > > > > I don't need TCP/IP, USB, Ethernet, WiFi, Filesystems and so on. > > > > I'm not sure, but I think the TTS library doesn't use Linux services,, > > but only C library call. > > How do I understand which function calls are present in the pre-compiled > > library included in SDK? > > > > If the library doesn't use specific Linux services, is it possible to > > convert a pre-compiled library for ARM Linux to a pre-compiled library > > for a bare-metal (no OS) ARM hw platform? Of course, the same ARM core. > > The only thing that comes to mind is the Raspberry Pi Zero. It is a > small board with the CPU and RAM using a microSD card for storage. It > has HDMI and USB but no Ethernet. A 0.1" centers pin connector provides > I/O. Do you need I/O? > > At a price of $5, I don't think you will find anything cheaper even if > you build it yourself! >if he only has a binary it might not work on a pi-zero, pi-zero is the old armv6 -Lasse