Search found 1792 matches

by victor_pv
Sun Dec 24, 2017 7:46 am
Forum: USB bootloader
Topic: [SOLVED] Bootloader for a mini-PLC with STM32F103VE w/ 16MHz crystal
Replies: 13
Views: 436

Re: Bootloader for a mini-PLC with STM32F103VC

I'll answer multiple things at once: -You can install the bootloader and use the usb for uploads. All that's needed in the 1k5 pull up resistor and you confirmed it's there. We use a trick to pull the USB line and then let if float up again to cause a re-enumeration. -There are precompiled bootloade...
by victor_pv
Thu Dec 21, 2017 5:32 pm
Forum: Off topic
Topic: [SOLVED] SPI Sharing ILI9341 and Touch XPT2046
Replies: 8
Views: 268

Re: SPI Sharing ILI9341 and Touch XPT2046

Hyperion it you stil have problems after trying Steve's library, add more information to your post indicating with pins you are using for each line.
You don't need to draw a diagram, but just something like this:
LCD_CS - Pin 1
LCD_Reset - pin 2
Touch_CS - Pin 3
...
by victor_pv
Thu Dec 21, 2017 2:40 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11942

Re: F405 & F411 versions of the BluePill

I'll download it and have a look. I think we will probably need to have another look after adding the tear drops. I found the other day this webpage does an autmated DFM check for free, no need to register or anything: http://instantdfm.bayareacircuits.com/ Besides checking minimum track separation,...
by victor_pv
Thu Dec 21, 2017 3:00 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11942

Re: F405 & F411 versions of the BluePill

How about we all first have a good look at it to do a last check for errors/improvements, and then we'll have some of these produced :). I'm inpatient :D , but my question was more directed at the whole design, whether it has all components and features he wanted, or he is still working on adding t...
by victor_pv
Wed Dec 20, 2017 11:57 pm
Forum: Projects
Topic: STM32F1/F4 3d Printer board. Worth a kickstarter?
Replies: 5
Views: 216

Re: STM32F1/F4 3d Printer board. Worth a kickstarter?

Roger, about quality and speed of prints I agree. The main reason I went to design mine was because I wanted 6 steppers, extra serial for wifi, and extra pins for the laser (although those could have been hijacked from endstops), none of those available in my GT2560, and the 6 steppers not available...
by victor_pv
Wed Dec 20, 2017 11:52 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11942

Re: F405 & F411 versions of the BluePill

Squonk, is this the final one, or are you stil thinking on adding something else?
by victor_pv
Wed Dec 20, 2017 4:20 pm
Forum: Projects
Topic: STM32F1/F4 3d Printer board. Worth a kickstarter?
Replies: 5
Views: 216

Re: STM32F1/F4 3d Printer board. Worth a kickstarter?

Thanks Ray, that's what I wanted, some brainstorming. About point 1, I couldn't find any STM based printer board available to use with Marlin, other than STM's own, which is expensive (worth it though, just not for everyone). There are closed hardware/closed source boards, but they have to be revers...
by victor_pv
Wed Dec 20, 2017 6:10 am
Forum: Libary request
Topic: stepper.h
Replies: 12
Views: 1298

Re: stepper.h

I do not know the library you are using, but in Marlin I can run steppers at over 40Khz with interrupts in the F1, and that's while doing several other things at the same time, so you should be able to achieve those 18000 steps/s easily.
by victor_pv
Tue Dec 19, 2017 5:19 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11942

Re: F405 & F411 versions of the BluePill

I think STM created the impression by having some SPI and some SDIO funtions in the same set of pins int he 405, but not an exact match. In others in the F4 family is like in the F1, not a single spi pin over there, so it's not easy to get confused as in the 405. Would have been great if they actual...
by victor_pv
Tue Dec 19, 2017 4:07 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 627
Views: 11942

Re: F405 & F411 versions of the BluePill

Apparently, ST is that clever that they designed the SDIO to be on SPI pins... This means that we should be able to drive the SDCard in single SPI mode on devices without SDIO peripheral. That is not what I see on the stm32f1ret datasheet. I see SDIO in the following pins: PC8 PC9 PC10 PC11 PC12 PD...