Search found 112 matches

by david.prentice
Tue Oct 10, 2017 8:56 am
Forum: Libraries & Hardware
Topic: Is anyone interested in helping to make an Arduino Due which uses [edited:] a 100-pin STM32L471
Replies: 92
Views: 2112

Re: Is anyone interested in helping to make an Arduino Due which uses [edited: a 100-pin STM32L471]

I had assumed you were in US or Europe. Nucleo boards take 24 hours to arrive from our local distributors. Compared with Due clones or STM32 BluePill taking 10-40 days from China. You know what the Chinese and Taiwan local markets are like. The US / European hobbyist will pay more for hardware. But ...
by david.prentice
Mon Oct 09, 2017 7:46 am
Forum: Libraries & Hardware
Topic: Is anyone interested in helping to make an Arduino Due which uses [edited:] a 100-pin STM32L471
Replies: 92
Views: 2112

Re: Is anyone interested in helping to make an Arduino Due which uses [edited: a 100-pin STM32L471]

Surely you can compare different STM32 chips by buying the relevant Nucleo or Discovery boards. You are either going to aim for lowest cost or best performance. In practice, you settle on a reasonable compromise. Personally, I like to have Arduino headers and accessible male pins. The Nucleo-64 and ...
by david.prentice
Thu Sep 28, 2017 9:26 am
Forum: Libraries & Hardware
Topic: Is anyone interested in helping to make an Arduino Due which uses [edited:] a 100-pin STM32L471
Replies: 92
Views: 2112

Re: Is anyone interested in helping to make an Arduino Due which uses a 100-pin STM32F072?

The F103 is a fairly elderly M3 chip. Its only redeeming feature is that Chinese BluePills and MapleMinis are very cheap. It has been succeeded by much better M3 and M4 chips If you want a Due replacement, you would be looking at a Cortex-M3 or M4 chip with similar number of pins to the elderly SAM3...
by david.prentice
Thu Aug 31, 2017 1:08 pm
Forum: Libary request
Topic: ili9225
Replies: 3
Views: 256

Re: ili9225

No, the ILI9225 is very different to the ILI9341. It is closer to the ILI9325 i.e. registers with 16-bit data. I think that the current Release of MCUFRIEND_kbv supports the ILI9225 in parallel mode. The Beta certainly does. I have an unpublished ILI9225_kbv which uses SPI interface. Please post a l...
by david.prentice
Tue Aug 29, 2017 9:45 pm
Forum: Hardware
Topic: anyone know if this lcd is ili9341 ?
Replies: 6
Views: 140

Re: anyone know if this lcd is ili9341 ?

this is the beastie from aliexpress keli store https://www.aliexpress.com/store/623118?spm=2114.10010108.0.0.4b24ae2bDGPvlj this is the beastie https://www.aliexpress.com/item-img/Free-Shipping-1pcs-lot-3-2-TFT-LCD-Module-Display-Touch-Screen-Panel-PCB-Adapter-Blue/2035710780.html?spm=2114.10010108...
by david.prentice
Sat Aug 12, 2017 10:36 pm
Forum: Hardware
Topic: A look inside the DS3231 RTC
Replies: 9
Views: 451

Re: A look inside the DS3231 RTC

Surely you can synchronise a clock to a GPS signal over a time period. And get an accurate time with averaging. There is no need to wait for a year. You can measure any phase difference between the DS3231 pulse output and the synchronised "accurate" clock. A 1 second error in 365 days is 0.03 ppm. Y...
by david.prentice
Mon Jul 24, 2017 1:07 pm
Forum: Libraries & Hardware
Topic: STM32F103C8 & TFT (ili9325)
Replies: 193
Views: 17552

Re: STM32F103C8 & TFT (ili9325)

If you want the fastest rendering of a BMP from SD card: 1. pre-process the BMP files into RAW data e.g. like UTFT utility. 2. set a rectangular window with the correct dimensions. 3. read the raw pixel data from SD with a DMA version of SD.h library. 4. blit the pixel data to the screen. e.g. with ...
by david.prentice
Sat Jul 22, 2017 2:22 pm
Forum: Libraries & Hardware
Topic: Use STM32F103C8 with TFT 320QVT 9341
Replies: 20
Views: 1666

Re: Use STM32F103C8 with TFT 320QVT 9341

My apologies. I was replying to empirejrz with a Discovery-F303 I should have replied to vincent47 with a F401RE. Both posters asked about the TFT 320QVT_9341 The same comment applies. Is there a Core for F401RE ? If there is an "official" Core, I will post a SPECIAL. If your questions do not apply ...
by david.prentice
Sat Jul 22, 2017 12:06 pm
Forum: Libraries & Hardware
Topic: Use STM32F103C8 with TFT 320QVT 9341
Replies: 20
Views: 1666

Re: Use STM32F103C8 with TFT 320QVT 9341

As far as I know, the TFT320QVT_9341 is only 16-bit. If you can configure for 8-bit life would be a lot easier. There is nothing very complicated with driving an ILI9341. There will be several libraries. The problem comes with "choosing" the wiring. I suggest that you just use whatever wiring the ex...
by david.prentice
Fri Jul 21, 2017 9:38 pm
Forum: Libraries & Hardware
Topic: STM32F103C8 & TFT (ili9325)
Replies: 193
Views: 17552

Re: STM32F103C8 & TFT (ili9325)

You have a regular Uno Shield. Plug it into a Uno. Install MCUFRIEND_kbv with the Library Manager. Run the examples. You will see what "SOFTWARE SCROLL" does on the Uno. The YELLOW text moves across the screen. There should not be any BLUE at all. I am sure that Steve's library will work just fine o...