Search found 1599 matches

by victor_pv
Wed Sep 20, 2017 5:16 am
Forum: STM32generic
Topic: New library for LCD FT8XX STM32
Replies: 27
Views: 1116

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: 27
Views: 1116

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: 5
Views: 53

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: 50
Views: 740

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: 24
Views: 451

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: 306

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.
by victor_pv
Mon Sep 18, 2017 7:20 pm
Forum: General discussion
Topic: Overactive interrupt triggering using internal pullups
Replies: 42
Views: 1188

Re: Overactive interrupt triggering using internal pullups

Btw, I am running here (BPill) 3 attached interrupts at 3 pins, the first fires 1300x per second, the second about 550x, the third about 4-10x per second (all at random times). I am not loosing a single one (so far). In parallel Serial.print(), math, HardWire I2C, bitbanged SPI into Xilinx. Doing i...
by victor_pv
Mon Sep 18, 2017 5:01 pm
Forum: Postbag
Topic: FRAM FM24C256 from RAMTRON
Replies: 17
Views: 306

Re: FRAM FM24C256 from RAMTRON

So if the endurance paper is 15 years old, I hope by now they have stopped testing the FRAMs and know how far they actually can go, but didn't publish it!
by victor_pv
Mon Sep 18, 2017 4:23 pm
Forum: Postbag
Topic: FRAM FM24C256 from RAMTRON
Replies: 17
Views: 306

Re: FRAM FM24C256 from RAMTRON

Ramtrom FRAM business is now part of Cypress, so definitely before the date of that acquisition.

One of them is from 2002 for sure, that's the endurance test using the FPGA:
https://ntrs.nasa.gov/search.jsp?R=20060030363
by victor_pv
Mon Sep 18, 2017 2:10 pm
Forum: Postbag
Topic: FRAM FM24C256 from RAMTRON
Replies: 17
Views: 306

Re: FRAM FM24C256 from RAMTRON

Well I was thinking more in the line of testing a few positions repeatedly, I don't have that amount of time to spare ;) There are two papers from NASA on the subject, one a stress test with conditions that could happen in space: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20030036989.pdf ...