STM32 Discovery « LeafLabs Garden

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STM32 Discovery

(97 posts) (24 voices)

Started 4 years ago by ultrasounder
Latest reply from ala42

anton
Member

Why there is no

__attribute__(( constructor )) void premain() {
    init();
}

in last program?

Posted 4 years ago #

ridgebackred
Member

Hi Anton,

Thank you for your work on the Discovery branch.
The last paragraph in the RCradioPWM program should be:

// Force init to be called *first*, i.e. before static object allocation.
// Otherwise, statically allocated objects that need libmaple may fail.
__attribute__(( constructor )) void premain() {
    init();
}

int main(void) {
    setup();

    while (1) {
        loop();
    }
    return 0;
}

I think it may be time to spin off a wiki page or blog for the LibMaple ~ Discovery somewhere if there is interest from forum readers.

Posted 4 years ago #

o_pas
Member

Hi everybody.
Now ST released 'ST Link Utility V2.0'. It has 'ST-Link Utility Command Line Interface' (file ST-LINK_CLI.exe) to program binary file (.hex, .bin) to STM32 microcontroller.
I think modify Maple IDE to support command "Upload by ST-LINK UTILITY" now Maple IDE and Maple Library will using with STM32-VL Discovery board and all of board that used STM32 + ST-LINK Hardware.

Posted 4 years ago #
anton
Member

Now we need to ask ST to compile version for Linux

Posted 4 years ago #
dreamcat4
Member

& Mac OS-X some might hope

Posted 4 years ago #
ridgebackred
Member

A Discovery wiki has been started at wiki.leaflabs.com under How To Guides.
I'm using snipt.net (didn't I do that to my dog?) to host source code with pretty formatting and keyword highlighting.

Posted 4 years ago #
anton
Member

gbulmer, thank you for detailed analysis.
us *= 8; provides the exact value.

Posted 4 years ago #
ridgebackred
Member

The Discovery board and Anton's libmaple branch are flying in my tricopter.
Two lipo packs into flight testing so far... FUN!
http://snipt.net/ridgebackred/discoveryflyer001/

Posted 4 years ago #
ridgebackred
Member

The thing I like best about writing code for things that fly is there is no doubt if something screws up. ;-) I've accumulated two hours or so of flight time on the code. No discernible glitches or crashes so far...

Anton, should I now use your discovery branch instead of the refactor branch?

Posted 4 years ago #
ppeetteerr
Member

So I'm not exactly sure how to use Anton's libmaple branch. At first I thought that it was a branch of the IDE (after comparing the source I'm pretty sure its not the entire IDE). How is it supposed to be used? Do I have to add the lines earlier in this post to the IDE files (e.g. boards). Can someone help me out. what do I do with Anton's libmaple branch?

Thanks.

Posted 4 years ago #
ridgebackred
Member

ppeetteerr-http://wiki.leaflabs.com/index.php?title=Edit_sketches_with_Eclipse

Rename main.cpp.example to main.cpp to see if you can compile.
The line SerialUSB.println("Hello!"); needs to be commented out for the Discovery.

I put whatever program I'm working on in the same directory as main.cpp.example and rename it to main.cpp.

The discovery.bin file to upload will be found in the build directory.

Posted 4 years ago #
anton
Member

ridgebackred, my copy of refactor has no discovery support, it was made just to pull i2c patch

Posted 4 years ago #
ridgebackred
Member

Anton,
Thanks, I am still learning Github...
Are you able to read data from the wii nunchuk over i2c?
If yes, are you using 3V or 5V for power? External pullup resistors?

Posted 4 years ago #
anton
Member

I read Nunchuk via WiiMP (clone versions from dealextreme.com) in pass-through mode, pover from 3.3V and do not use pullups.
http://wiibrew.org/wiki/Wiimote/Extension_Controllers
The sensors consume very little, so I should disconnect even serial cable to reset it.
I use similar code (add premain()):
https://github.com/anton19286/libmaple/blob/discovery/i2c.cpp

Posted 4 years ago #

ridgebackred
Member

Anton, you fixed this already in the pre-refactor code... :-)

In HardwareSerial.cpp:

// TODO Put these magic numbers into boards.h #defines
HardwareSerial Serial1(USART1, TX1, RX1, 24000000UL); // was 72000000UL
HardwareSerial Serial2(USART2, TX2, RX2, 12000000UL); // was 36000000UL
HardwareSerial Serial3(USART3, TX3, RX3, 12000000UL); // was 36000000UL

STM32 Discovery

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