Search found 1129 matches

by stevestrong
Fri Jun 23, 2017 8:12 am
Forum: General discussion
Topic: Connecting Nextion display to Nucleo L432KC
Replies: 3
Views: 13

Re: Connecting Nextion display to Nucleo L432KC

Which core are you using?
This should be then moved to the corresponding thread folder.
(Roger, the code got a bug in the 4th line after editing it...)
by stevestrong
Fri Jun 23, 2017 6:45 am
Forum: Libraries & Hardware
Topic: Lib for ILI9486 - 3.5 inch 480x320 touch TFT for RPi
Replies: 175
Views: 6147

Re: Lib for ILI9486 - 3.5 inch 480x320 touch TFT for RPi

Your link cannot be accessed.
Which core are you using?
Maximum frequency is ~24MHz without my mod.
Yes, SPI is working in 16 bit mode.
Wires should be as short as possible.
by stevestrong
Thu Jun 22, 2017 5:49 pm
Forum: STM32F4 Boards
Topic: [libmaple] SDIO
Replies: 13
Views: 227

Re: [libmaple] SDIO

Vitor,
this is SDIO, not SPI.
And higher frequencies than 37MHz for SDIO (tested by Pito) do not work reliable anymore. This is a HW limitation of the F4 chip.
by stevestrong
Thu Jun 22, 2017 2:14 pm
Forum: General discussion
Topic: Problem with measuring very short pulses
Replies: 29
Views: 808

Re: Problem with measuring very short pulses

I assume you have already read the original libmaple documents about how to use the timers:
http://docs.leaflabs.com/static.leaflab ... dwaretimer
by stevestrong
Thu Jun 22, 2017 2:11 pm
Forum: STM Nucleo boards
Topic: STM32F091RC I2C not working
Replies: 2
Views: 24

Re: STM32F091RC I2C not working

The STM32 internal pull-up resistors are very weak (30..50k), so a working I2c always need extra pull-ups.
by stevestrong
Thu Jun 22, 2017 1:54 pm
Forum: Projects
Topic: OV7670, Generic STM32F103RC and ILI9341 display
Replies: 58
Views: 6061

Re: OV7670, Generic STM32F103RC and ILI9341 display

OK, then I can only think on either wrong config data (YUV instead of RGB), or erroneous communication channel which leads to wrong configuration.
by stevestrong
Thu Jun 22, 2017 11:45 am
Forum: Projects
Topic: OV7670, Generic STM32F103RC and ILI9341 display
Replies: 58
Views: 6061

Re: OV7670, Generic STM32F103RC and ILI9341 display

It seems to be 565, but read out in big endian format (high byte first).
If you store it as an uint16_t, and write it to the display in little endian, then the colors will be of course different.
by stevestrong
Thu Jun 22, 2017 6:55 am
Forum: Generic STM32F103
Topic: UART usable when programming with ST-LINK?
Replies: 2
Views: 48

Re: UART usable when programming with ST-LINK?

davey wrote:
Thu Jun 22, 2017 2:32 am
If I use the ST-LINK for programming, are the regular UART TX/RX signals free to use using the standard Serial functions?
Yes.
by stevestrong
Wed Jun 21, 2017 7:02 pm
Forum: STM32F4 Boards
Topic: [libmaple] SDIO
Replies: 13
Views: 227

Re: [libmaple] SDIO

When I activated the debug output I saw that the first run involves much less block reads than the following ones, which are again all comparable.

So it is not due different write latencies.
by stevestrong
Wed Jun 21, 2017 6:49 am
Forum: STM32F4 Boards
Topic: [libmaple] SDIO
Replies: 13
Views: 227

Re: [libmaple] SDIO

OK, so you could reproduce my issue.
For libmaple core, the first read and write takes a lot less time (34231 msecs) than the following read writes (58237 msecs).
Your core seems not to show this issue.

Hmmm.