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by martinayotte
Thu Apr 20, 2017 11:01 pm
Forum: Working / ported libraries
Topic: winbond W25Q64xxx SPI flash
Replies: 4
Views: 2274

Re: winbond W25Q64xxx SPI flash

Probably ...
But I never used it myself, I'm still using the one from https://github.com/LowPowerLab/SPIFlash
by martinayotte
Tue Apr 18, 2017 1:27 pm
Forum: Off topic
Topic: New RPi Zero W - with Wifi and Bluetooth
Replies: 30
Views: 584

Re: New RPi Zero W - with Wifi and Bluetooth

You can also get some OrangePiZero for less than $8.00 including shipping, but no BT.
by martinayotte
Tue Apr 18, 2017 1:18 pm
Forum: General discussion
Topic: Dhrystone and Whetstone Benchmarks for STM32F103
Replies: 161
Views: 7417

Re: Dhrystone and Whetstone Benchmarks for STM32F103

Something looks strange : I've done tests on Sep 2015 (look at page 4 on current thread), and F405 was giving 130 MIPS.
Did you overclocked your F407 ?
by martinayotte
Sat Apr 15, 2017 2:33 pm
Forum: STM32F4 Boards
Topic: Improving F4 core (libmaple based)
Replies: 124
Views: 1283

Re: Improving F4 core (libmaple based)

stevestrong wrote:But the F4 does not have (yet?) any bootloader with DFU upload possibility.

There is no need for any bootloader since F4xx has DFU built-in in the ROM bootloader.
by martinayotte
Fri Apr 14, 2017 1:52 pm
Forum: STM32F4 Boards
Topic: STM32F4 Discovery
Replies: 8
Views: 155

Re: STM32F4 Discovery

That's a pity because the STM32F4 discovery has this interesting peripherals: That doesn't prevent you from trying to code new driver ... BTW, be aware that CS42L22 doesn't get its audio data from I2C, I2C is only to control internal registers, the actual audio data is coming fro a I2S, which is co...
by martinayotte
Thu Apr 13, 2017 4:04 pm
Forum: STM32F4 Boards
Topic: STM32F4 Discovery
Replies: 8
Views: 155

Re: STM32F4 Discovery

Why copies are not done in F4 folder ? Simply because more than 2 years ago, we had discussion about the possibilities of merging folders, but it never happen. The new repository is owned by Roger, but it is used by STM employees, so the authors are working at STM. About I2C code, I personally using...
by martinayotte
Thu Apr 13, 2017 2:37 pm
Forum: STM32F4 Boards
Topic: STM32F4 Discovery
Replies: 8
Views: 155

Re: STM32F4 Discovery

Yes, the Wiki is related to Roger's repository, not the newest one.
But there is no I2C and no support for the peripherals.

Using Roger's repository, you can simply copy the Wire library from STM32F1 into STM32F4, or even create a symbolic link.
It is what I'm using since almost 2 years.
by martinayotte
Sun Apr 02, 2017 7:14 pm
Forum: Custom design boards
Topic: My custom stm32f411 board
Replies: 3
Views: 118

Re: My custom stm32f411 board

Leaving pins such boot0 floating is not a good practice. The fact that is already working is simply because a floating pin is a bit like a GPIO input without pullup, a read will return 0, considering that floating is almost like a 0V input. But it is not a good practice because in harsh environment,...
by martinayotte
Fri Mar 31, 2017 8:24 pm
Forum: Libraries & Hardware
Topic: Hints about the MMC/SD card library by Roland Riegel
Replies: 34
Views: 599

Re: Hints about the MMC/SD card library by Roland Riegel

I agree but natively SdFat doesn't support MMC so I can't use it. What is the reason you do absolutely want MMC support ? (especially that MMC are slower than SD) http://www.differencebetween.net/technology/hardware-technology/difference-between-mmc-and-sd-interface/ What kind of data you wish to p...
by martinayotte
Fri Mar 31, 2017 1:07 pm
Forum: STM32F4 Boards
Topic: f407vet6 & f407zet6
Replies: 55
Views: 2452

Re: f407vet6 & f407zet6

Most of the init stuff are done in files located in STM32F4/cores/maple/libmaple/ folder.

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