Beware of GNU-ARM compiler for Cortex-M0/M0+/M1

Started by StateMachineCOM in comp.arch.embedded1 month ago 18 replies

The popular GNU-ARM toolset has had long-known issues for the Cortex-M0/M0+/M1 (ARMv6-M architecture). Specifically, people have reported very...

The popular GNU-ARM toolset has had long-known issues for the Cortex-M0/M0+/M1 (ARMv6-M architecture). Specifically, people have reported very inefficient code generated, see "Cortex M0/M0+/M1/M23 BAD Optimisation in GCC" https://embdev.net/topic/426508 . But while so far people reported only inefficient code, I would like to make people aware of *incorrect* code generated by GNU-AR


Can a piezo buzzer generate damaging voltages?

Started by John Speth in comp.arch.embedded1 month ago 10 replies
MCU

My team is being asked to find out why a circuit is failing for no obvious reason. The circuit has a piezo buzzer (CEP2242 from CUI, Inc). ...

My team is being asked to find out why a circuit is failing for no obvious reason. The circuit has a piezo buzzer (CEP2242 from CUI, Inc). The buzzer is driven by a MCU driven FET that completes a circuit like this: high side power 3.3V -> buzzer -> FET -> ground (BSS123LT1 FET on the low side). Does anybody have any experience with the possibility of a piezo buzzer generating dama


6805 EVM boards Off Topic sorry

Started by Walter Banks in comp.arch.embedded1 month ago 6 replies

I have a customer that is looking for a Motorola 6805 EVM or other devlopment board board. He has an old project that he needs to...

I have a customer that is looking for a Motorola 6805 EVM or other devlopment board board. He has an old project that he needs to change. Sorry for the off topic post. Contact me off line w..


GNU-ARM toolchain, no q3 update?

Started by Uwe Bonnes in comp.arch.embedded1 month ago 1 reply

Hello, up to now, there was a quarterly update of the arm-none-eabi toolchain. No such update for q3 yet. Does anybody know what is going...

Hello, up to now, there was a quarterly update of the arm-none-eabi toolchain. No such update for q3 yet. Does anybody know what is going on? Thanks -- Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 1623569 ------- Fax. 06151 1623305 ---------


Online groups and resources for sharing embedded programming source code

Started by aljaz41 in comp.arch.embedded2 months ago 3 replies

I'd like to start a discussion because I'm sure some of you might have some great advice. I'd really like to get better at programming...

I'd like to start a discussion because I'm sure some of you might have some great advice. I'd really like to get better at programming for embedded systems. I see my friend who is a computer science student and he's doing some interesting projects at work and he's got stackoverflow at his disposal and not only he's enjoying it but also learining a lot. I know that to get better at any kind of p...


RabbitWeb and BL2600

Started by therabbitboss in comp.arch.embedded2 months ago 1 reply

Hello, I am currently running BL2600 with Web Server (RabbitWeb). I am little confused with RabbitWeb setup. I DEBUGED and RAN the...

Hello, I am currently running BL2600 with Web Server (RabbitWeb). I am little confused with RabbitWeb setup. I DEBUGED and RAN the SAMPLE RabbitWeb program web.c and it ran with no problem. I was able to successfully access the webpage by simply typing in the Rabbit IP address on my web browser (firefox), but when I run my program and do the same, I don't get the rabbit webpage that I created but ...


Embedded platforms for beginners?

Started by Elof Huang in comp.arch.embedded2 months ago 73 replies

I want to learn Embedded systems, but don't know how to start it, do you recommend any platform to start?

I want to learn Embedded systems, but don't know how to start it, do you recommend any platform to start?


USB VID & PID

Started by Mike Perkins in comp.arch.embedded2 months ago 1 reply

I understand that some silicon vendors provide a PID on request such as Microchip, unfortunately I can't see that ST have this sort of...

I understand that some silicon vendors provide a PID on request such as Microchip, unfortunately I can't see that ST have this sort of policy. What do people do here rather than pay $5k per year for the privilege of 'owning/renting' a VID/PID combination? I have come across MCS Electronics who sell PIDs for a withdrawn VID. -- Mike Perkins Video Solutions Ltd www.videosolutions....


Multi-language support on embedded plarforms

Started by pozz in comp.arch.embedded2 months ago 22 replies

[This message is posted to comp.arch.embedded and comp.lang.c] Just for reference, an embedded platform based on a MCU with integrated Flash,...

[This message is posted to comp.arch.embedded and comp.lang.c] Just for reference, an embedded platform based on a MCU with integrated Flash, for example a Cortex-Mx device. Here I consider only western languages (left-to-right and european chars, english, french, german, spanish and so on). The main problem is the translation of strings, maybe 10-100 strings. I know something about ...


TFT LCD to use outdoor

Started by pozz in comp.arch.embedded2 months ago 3 replies
LCD

I'm using a display board from Adafruit [1]. It was ok, until I knew the device will be used outdoor, under the sun. Of course, the...

I'm using a display board from Adafruit [1]. It was ok, until I knew the device will be used outdoor, under the sun. Of course, the visibility of that display outdoor isn't good at all. Any suggestions how to improve its visibility? Is there a *similar* display that is good outdoor? Here similar means I should make minor changes (hw and sw) to adapt the current design to the new displa...


Ask a Question to the EmbeddedRelated community

To significantly increase your chances of receiving answers, please make sure to:

  1. Use a meaningful title
  2. Express your question clearly and well
  3. Do not use this forum to promote your product, service or business
  4. Write in clear, grammatical, correctly-spelled language
  5. Do not post content that violates a copyright