Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Saturday, 22 July 2017 at 18:51:34 UTC, Sönke Ludwig wrote: Am 21.07.2017 um 09:40 schrieb Andrea Fontana: It has a lot of potential. I always hope that someone will start a 3d Printer firmware written in D for a 32bit microcontroller. I've actually started to implement a GCode processor in D a while ago, because I was unsatisfied with the open source firmwares that exist. It's more tailored towards CNC routers, but since those are pretty similar that shouldn't be a big problem. The bad news is that I don't have time to work on it anymore and it was still at a relatively early stage. D for programming + Vibe for web/mobile interface + Mir for math would be a win for a 3d printer firmware. Using templates and component programming should fit perfectly a generic-composable firmware for printers. (check delta vs cartesian vs corexy + different stepper drivers + different motors + different boards + ...)
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Thursday, 20 July 2017 at 12:23:31 UTC, Mike wrote: A few years ago I created a bare metal demo on an ARM Cortex-M4 microcontroller entirely in D. It was just a demonstration that one could do bare metal programming for microcontrollers in D without any dependencies on C or assembly. It was also a proof of some ideas I had about leveraging compile-time features of D to generate highly-optimized code (both small and fast) for these resource constrained systems. I hit a wall, however, with Issue 14758[0], and ultimately abandoned D for other alternatives. Well, that issue was recently fixed in GDC [1]. In addition, he GDC developers did some work to reduce the number of phony stubs one had to add to the runtime to get a build [2], removed the "shared is volatile" hack, and implemented the `volatileLoad/Store` intrinsics so I no longer need to do volatile access in assembly. So, I decided to give it another try, and updated that demo. You can see the results at https://github.com/JinShil/stm32f42_discovery_demo Congratulations, Mike. https://www.reddit.com/r/programming/comments/6pn31c/d_on_bare_metal_stm32f4_redux/ Could someone post to Hacker News? I don't have enough rep for it to propagate.
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
Am 21.07.2017 um 09:40 schrieb Andrea Fontana: It has a lot of potential. I always hope that someone will start a 3d Printer firmware written in D for a 32bit microcontroller. I've actually started to implement a GCode processor in D a while ago, because I was unsatisfied with the open source firmwares that exist. It's more tailored towards CNC routers, but since those are pretty similar that shouldn't be a big problem. The bad news is that I don't have time to work on it anymore and it was still at a relatively early stage.
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Friday, 21 July 2017 at 07:40:20 UTC, Andrea Fontana wrote: On Thursday, 20 July 2017 at 12:23:31 UTC, Mike wrote: A few years ago I created a bare metal demo on an ARM Cortex-M4 microcontroller entirely in D. It was just a demonstration that one could do bare metal programming for microcontrollers in D without any dependencies on C or assembly. It was also a proof of some ideas I had about leveraging compile-time features of D to generate highly-optimized code (both small and fast) for these resource constrained systems. I hit a wall, however, with Issue 14758[0], and ultimately abandoned D for other alternatives. It has a lot of potential. I always hope that someone will start a 3d Printer firmware written in D for a 32bit microcontroller. Can't wait to see that day
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Friday, 21 July 2017 at 00:27:09 UTC, Mike wrote: On Thursday, 20 July 2017 at 17:09:40 UTC, Mr.D wrote: Thanks for your work with bare metal MCUs! I am dreaming that someday I can program smart house IoT automation on D. You already can; it just may not be the most professional experience. If you have the hardware and the time, do it! Mike I am stopped by the lack of a system library for work with GPIO, PWM etc specific MCU things.
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Thursday, 20 July 2017 at 12:23:31 UTC, Mike wrote: A few years ago I created a bare metal demo on an ARM Cortex-M4 microcontroller entirely in D. It was just a demonstration that one could do bare metal programming for microcontrollers in D without any dependencies on C or assembly. It was also a proof of some ideas I had about leveraging compile-time features of D to generate highly-optimized code (both small and fast) for these resource constrained systems. I hit a wall, however, with Issue 14758[0], and ultimately abandoned D for other alternatives. It has a lot of potential. I always hope that someone will start a 3d Printer firmware written in D for a 32bit microcontroller.
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Friday, 21 July 2017 at 00:27:09 UTC, Mike wrote: On Thursday, 20 July 2017 at 17:09:40 UTC, Mr.D wrote: Thanks for your work with bare metal MCUs! I am dreaming that someday I can program smart house IoT automation on D. You already can; it just may not be the most professional experience. If you have the hardware and the time, do it! Mike Thanks for your work
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
On Thursday, 20 July 2017 at 17:09:40 UTC, Mr.D wrote: Thanks for your work with bare metal MCUs! I am dreaming that someday I can program smart house IoT automation on D. You already can; it just may not be the most professional experience. If you have the hardware and the time, do it! Mike
Re: Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
Thanks for your work with bare metal MCUs! I am dreaming that someday I can program smart house IoT automation on D.
Update to Bare Metal STM32F4 (ARM Cortex-M4) LCD Demo Proof of Concept
A few years ago I created a bare metal demo on an ARM Cortex-M4 microcontroller entirely in D. It was just a demonstration that one could do bare metal programming for microcontrollers in D without any dependencies on C or assembly. It was also a proof of some ideas I had about leveraging compile-time features of D to generate highly-optimized code (both small and fast) for these resource constrained systems. I hit a wall, however, with Issue 14758[0], and ultimately abandoned D for other alternatives. Well, that issue was recently fixed in GDC [1]. In addition, he GDC developers did some work to reduce the number of phony stubs one had to add to the runtime to get a build [2], removed the "shared is volatile" hack, and implemented the `volatileLoad/Store` intrinsics so I no longer need to do volatile access in assembly. So, I decided to give it another try, and updated that demo. You can see the results at https://github.com/JinShil/stm32f42_discovery_demo A few observations: * It is a better experience than it was a few years ago. Fewer dirty hacks are required, and the resulting binary is small and fast. * Everything is in D (inline assembly is D). There's no need for any C or assembly startup code, and no need for silly things like -betterC (i.e. -worseD). If you don't want the overhead from a feature of D, don't use it. * Compile times are quite slow (about 1 minute to get a 3kB binary). Some discussion about that is taking place on the GDC forum [4]. * -O2 and -O3 give me a broken binary, but -O0, -O1, and -Os work well. I'm not sure where I'll go from here. I'm interested in helping an amputee play the drums again, and building my own mechanical keyboard, so I probably won't be spending much more time on this LCD demo, except maybe to help compiler devs debug some issues. However, I might spend some more time with D in the near future, and see how far I can take this. I'm still not as excited as I once was, but it's nice to see these improvements. Anyway, Well done, GDC! Mike [0] - TypeInfo causes excessive binary bloat - https://issues.dlang.org/show_bug.cgi?id=14758 [1] - Put the TypeInfo name field into a static var - https://github.com/D-Programming-GDC/GDC/pull/505 [2] - Refactor and reformat typeinfo.cc - https://github.com/D-Programming-GDC/GDC/pull/456 [3] - Slow compile-time discussion at GDC forum - http://forum.dlang.org/post/iqryqssxooypdnszm...@forum.dlang.org
