Search found 1605 matches

by victor_pv
Sat Sep 23, 2017 11:34 pm
Forum: General discussion
Topic: Dhrystone and Whetstone Benchmarks for STM32F103
Replies: 170
Views: 10942

Re: Dhrystone and Whetstone Benchmarks for STM32F103

We use the STM32L433 as a suport chip for our open source ICE40 FPGA board - BlackIce This one?: https://www.fpgarelated.com/thread/799/mystorm-a-30-ice40-arm-m3-dev-board Its written: ICE40HX4K and an STM32F103 Cortex M3 I suspect it may be a new version of the board, since he called it BlackIce, ...
by victor_pv
Sat Sep 23, 2017 4:53 pm
Forum: Working / ported libraries
Topic: Free RTOS and idle loop()
Replies: 6
Views: 56

Re: Free RTOS and idle loop()

In Arduino (and in any core to be used with the arduino IDE) there is still a main() function hidden inside the core. That main function basically is like this: main(){ setup(); while (1) { loop(); } } So both setup and loop need to exist, but could just as well use a completely empty loop since you...
by victor_pv
Sat Sep 23, 2017 3:49 am
Forum: Working / ported libraries
Topic: Free RTOS and idle loop()
Replies: 6
Views: 56

Re: Free RTOS and idle loop()

My problem is in understanding the FreeRTOS idle task within Arduino. Searching reveals that FreeRtos uses the standard Arduino loop() as its idle task. It should not. Someone ported FreeRTOS 6 or 7 to libmaple long time ago. I brought that up to date to 8.2.1 and later to 9.0.0, and has been a whi...
by victor_pv
Sat Sep 23, 2017 2:56 am
Forum: Projects
Topic: OV7670, Generic STM32F103RC and ILI9341 display
Replies: 307
Views: 11670

Re: OV7670, Generic STM32F103RC and ILI9341 display

Roger how large are the buffers you read from the camera, and how large the one you write to the sdcard? I ask because I have had good luck running the sdfat in parallel with other things with a modified driver that uses the new DMA callback functions, and FreeRTOS. Obviously if the buffers are smal...
by victor_pv
Fri Sep 22, 2017 7:09 pm
Forum: Projects
Topic: Anyone tried to make a 3D Printer controller?
Replies: 247
Views: 18671

Re: Anyone tried to make a 3D Printer controller?

I get a feeling all that complication would not be worth it when an RCT or a VCT MCU have many more pins and cost almost the same. I am in the process of building a 3d printer controller board around an STM32F1 or F4 daughterboard (Vxx MCU, replaceable). I am basing my design off the many other exis...
by victor_pv
Fri Sep 22, 2017 2:22 am
Forum: Ideas & suggestions
Topic: Differential ADC (ADC1-ADC2)
Replies: 12
Views: 255

Re: Differential ADC (ADC1-ADC2)

mrburnette wrote:
Sun Sep 17, 2017 10:02 pm
Recall that the official Maple mini had separate analog and digital ground planes.
Baite (&others) went cloning with a dual-sided board ... hence the increased analog noise.

Ray
And the original had 4 layers vs 2 in the clones too.
by victor_pv
Wed Sep 20, 2017 5:16 am
Forum: STM32generic
Topic: New library for LCD FT8XX STM32
Replies: 28
Views: 1166

Re: New library for LCD FT8XX STM32

Team FT81x work hard on getting library. Good job porting the library. You could improve the performance of your library with a few small changes, and perhaps be able to play the jpgs with a frame rate more similar to teensy. You have a lot block reads and transfers in loops sending 1 byte at a tim...
by victor_pv
Wed Sep 20, 2017 4:53 am
Forum: STM32generic
Topic: New library for LCD FT8XX STM32
Replies: 28
Views: 1166

Re: New library for LCD FT8XX STM32

Rauf looks like you may need the SDFat library, do you have it in your libraries folder?
by victor_pv
Wed Sep 20, 2017 4:31 am
Forum: STM32generic
Topic: B-L475E-IOT01A
Replies: 9
Views: 116

Re: B-L475E-IOT01A

Does the L475 have 3 ADCs? or perhaps it only has 1?
by victor_pv
Tue Sep 19, 2017 5:14 pm
Forum: Off topic
Topic: NuttX on a BluePill
Replies: 52
Views: 855

Re: NuttX on a BluePill

Pito can confirm, but I think it was this one: https://www.aliexpress.com/item/STM32F103ZET6-minimum-system-version-STM32-ARM-core-board-cortex-M3/32741572112.html?spm=2114.search0104.3.40.lqwvr8&ws_ab_test=searchweb0_0,searchweb201602_4_10152_10065_10151_10130_10068_10344_5560015_10342_10343_10340_...