Raspberry Pi Forums

davenull

isn't this the "official" Raspberry Pi forum?
So cannnot the (hardware) developers be expected to read what the consumers wish and what issues exist?

davenull

hey,
are there additional font types for openvg C/C++ available ?
e.g.,
Zapfdingbats / Windings,
Symbol,
Greek alphabet,
EnglandHand or either handwriting font type,
7-segment LED,

davenull

ps, extra digital and analog pins could be provided by an extra onboard AVR or even an ARM M3, quickly interfaced e.g., by highspeed-SPI or USB.
That reminds me of another model 3... or TRE...

now we are pleased to present to you...

Raspberry Pi TRE !

davenull

yes the Raspi was good and is good at either time, but as time goes by, the improvements and enhancements proceed. (no, I have no A type, I started with the B+ because A and B had faaaaaaar tooooooo feeeeew pins...) (edit: the sandwich is inside or down under ;) ) Finally, the better one is the foe ...

davenull

done.

davenull

obviously, amazingly, the code seems to work... :shock: Not extremely quick, but good for a start 8-) share and enjoy! for the Raspi: /* Tx master * Raspberry Pi * ============ * ver 0006.2 * Raspbian 8.0 */ // (C) Helmut Wunder (HaWe) 2015 // freie Verwendung für private Zwecke // für kommerzielle ...

davenull

as time goes by...

(better 2 times too early than 1 time too late

)

davenull

I don't want a pony, if any, then an Arabian Stallion

davenull

yes indeed, why?

(if one thinks the Raspberry is fine as-it-is ... why didn't he/she stay with the Raspberry A ? )

davenull

fruitoftheloom wrote: Not required, there are other boards which will likely fit your requirements

and airplanes? who needs airplanes? Not required, they can't fly anyway as they are heavier than air...

(a wishlist is a wishlist is a wishlist ...

)

davenull

Wish List for Raspberry Pi Model 3:

- at least 2 UART ports
- at least 2 i2c ports
- at least 8 extra ADC ports (at least by 10 bit resolution)
- hardware graphics accelerator, perhaps by support of external USB-to-VGA or HDMI (?) graphic adapters

davenull

next question: what would be the best way to pass "real color names" to the Stroke(r, g, b, x) function? #define BLACK {0, 0, 0, 1} #define WHITE {255,255,255, 1} is this correct? Stroke( WHITE ); analoguesly, e.g. for: #define RED ... #define BLUE #define GREEN #define YELLOW #define MAGE...

davenull

except these settings described above (i.e. the patch of /boot/cmdline.txt) - will I have to do different things before my Serial communication will work for the Raspi? e.g., any additional UART settings on command line level? Or will the C code then compile and work correctly for the Raspi out of t...

davenull

thanks, now I slowly get it.. The return value is the file descriptor so it's not just an error to be returned, but also a file handle, correct? char * uart = "/dev/ttyAMA0"; int Serial1 = serialOpen (uart, 115200); // for Arduino code compatibility reasons then it will become char c; seri...

davenull

thank you for your reply!

(edit:)
so this way...?

char Serial1[] = "/dev/ttyAMA0"; // for code compatibility reasons, for the start...
int ioerr = serialOpen (Serial1, 115200);

davenull

e.g., for the start:

what is *device ? How is the serialOpen function to be used?
int serialOpen (char *device, int baud) ;

is this correct?

char * uart;
int ioerr = serialOpen (uart, 115200); // what is *uart? how has it to be initialized? or nothing?

davenull

indeed, Arduino Zero-based, Arduino IDE compatible libs, even 2 UART ports free - just curious about a free i2c and the RasPi-to-ZeroPi API interface though -
but over all:
awesome!

davenull

now the next question: I'm trying to port my serial communication program between 2 Arduinos to exchange one of them (called "Tx master") by a Raspberry Pi. The communication is performed at 115200 baud, 1N8. This is my Arduino code for testing and debugging purposes which is working highl...

davenull

ok, thank you for your input! now are there any alternatives to RoboPi, delivering from Europe (EU)? wanted: robotics multi-IO shield providing plugs for external L298 H bridges (or even more powerful ones which I already have, on proprietary backpanes) - to control 8 motors feat. rotary encoders - ...

davenull

thanks!

davenull

hey, I just wanted to share a little example program using some additional API functions: int _scrwidth_, _scrheight_; #define vgHidewindow HideWindow #define vgShowwindow End #define vgcls() ClearWindowRGB(_scrwidth_, _scrheight_, 0, 0, 0); #define vgStart Start #define vgInit init #define vgCleanu...

davenull

hey, on Gordon Henderson's wiringPi website http://wiringpi.com/wiringpi-and-the-raspberry-pi-model-b/ it's written: Do make sure you are using wiringPi Version 2.18 though. by command gpio -v I get gpio version 2.26 but even an update for 2.29 is available meanwhile. I have a Raspi B+, what version...

davenull

(cross over post)

davenull

you simply had to look for wage costs < 10$/h and lower shipping costs by having a European provider, sure! and 150 $ plus VAT = 160 EUR 1 Raspi model 2 is about 42 EUR https://www.conrad.de/de/raspberry-pi-2-model-b-1-gb-ohne-betriebssystem-1316978.html but ok, thanks for your input, then the Robot...

davenull

ahaa, that's the reason why, I see, thanks!

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