Search found 1603 matches

by victor_pv
Sat Sep 23, 2017 3:49 am
Forum: Working / ported libraries
Topic: Free RTOS and idle loop()
Replies: 4
Views: 20

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: 306
Views: 11616

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: 18647

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: 248

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: 1154

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: 1154

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: 99

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: 825

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_...
by victor_pv
Mon Sep 18, 2017 8:36 pm
Forum: PR's bugs and enhancements
Topic: PR to add optimisation menu (to all boards individually)
Replies: 27
Views: 493

Re: PR to add optimisation menu (to all boards individually)

I actually had hoped that you would say it's ok to use it :(
by victor_pv
Mon Sep 18, 2017 7:22 pm
Forum: Postbag
Topic: FRAM FM24C256 from RAMTRON
Replies: 17
Views: 327

Re: FRAM FM24C256 from RAMTRON

Problem with the SSDs was other types of failures that can happen at any time, rather than wear cells. May be the same case with FRAMs, where they will rather give a limit than say unlimited and then see failures because so other parts of the chip fail.