HDL Repository has moved

Due to some recent issues with repo.or.gz, I moved the HDL repository into github.

https://github.com/alvieboy/ZPUino-HDL.

To change your current checkout, do:

git remote add github git://github.com/alvieboy/ZPUino-HDL.git
git fetch github
git branch --set-upstream master remotes/github/master

All should work, I hope.

Alvie

ZPUino 1.0 Released

Yes, that is true.

ZPUino 1.0 is now available for you to use and enjoy.

Expect some updates on next few days - release cycles are about to change, we're switching to release early, release often.

As always, direct any questions to zpuino@alvie.com.

All information in the usual place
Enjoy!.

Preparing release 1.0

I think it's time now to wrap up all bits and release a 1.0 version, which hopefully will be before the end of March.

What to expect from this release ? well, basically:

• The new improved extreme core (things will go faster)
  
• Smaller generated code for sketches
  
• Upload-to-RAM feature
  
• New timer infrastructure (means, PWM on steroids)
  
• Easier to tailor to your own needs
  
• New VGA interfaces
  
• Optional I2C (integration from OpenCores)
  
• Faster SmallFS implementation
  
• Arduino 1.0 IDE
  
• Eventually more memory... this depends on the board itself.
  
• Per-board variants (like I2C, VGA)
  
• Audio chips!! YM2149, Pokey and SID. Note that due to these "chip" sizes, it might not fit your FPGA.
  
• Papilio Plus support (S6LX4 for now)
  

For the hardcore details:

• New DMA interface (not controller). It's used for VGA, so it can use regular memory as framebuffer.
  
• Better external memory integration. This one is still under test, but might make it.
  
• PWM have now 2 comparators (low and high). Also you can add as much PWM as you wish per timer.
  
• Decreased serial FIFO: means, more block ram memory available.
  
• Other goodies. See official repo branch for more details.

Other stuff is in the forge, but might not make it for this release. I think I've delayed it for too long now. Release early, release often.

As always, feel free to send in your comments to zpuino@alvie.com.

PS: Did I told you I will also publish a ZX-Spectrum VGA compatible output, and that it will be accompanied by a "arduino sketch" Jet Set Willy game engine implementation (not a 100% implementation, but close) ? Yes, it's true. And you can have fun making your own maps, sprites and variants!. I'm just finishing some documentation, so you can go and make it a 100% implementation if you wish.

Alvie

How complex ?

How complex can a voltmeter be, with ZPUino, my yet-to-be-released SerPro3 software and a Gadget Factory ADC wing ?

Well, judge for yourselves:

This is ZPUino code (29 lines):

#include <SerPro3.h>
#include <SPI.h>
#include <Papilio.h>

SERPRO_ARDUINO_BEGIN();

Papilio::ADC8_Wing myadc;

void setup()
{
 Serial.begin(115200);
 myadc.begin( Papilio::Wing_A_Low );
}

uint16_t sample(int channel)
{
 return myadc.sample(channel);
}

void loop()
{
 if (Serial.available())
  SerPro::processData(Serial.read());
}

EXPORT_FUNCTION(1,sample);

SERPRO_ARDUINO_END();

And this is PC code (23 lines, Linux):

#include <SerPro/SerPro-glib.h>

SERPRO_GLIB_BEGIN();
IMPORT_FUNCTION(1,sample,uint16_t(int));

void go()
{
 while(1) {
  printf("Voltage: %.02f\n", ((double)sample(0)*3.3)/255.0 );
  usleep(500000);
 }
}

int main(int argc,char **argv)
{
 SerProGLIB::init(argv[1],B115200);
 SerProGLIB::start();
 SerProGLIB::waitConnection();

 go();
}

SERPRO_GLIB_END();

And this is how it runs, with ADC connected (channel 0) to 1.2V power rail:

$ ~/sketchbook/remote/pc/remote /dev/ttyUSB1
Channel set up OK
Voltage: 1.20
Voltage: 1.20
Voltage: 1.20
Voltage: 1.20
Voltage: 1.20

Not much of a hassle, is it ?

Looking for "alpha" testers

I'm currently looking for "alpha" testers for the upcoming 1.0 version, which uses the new Arduino IDE and a new, improved core.

In case you are interested in testing it, please drop me a note. !
Alvie

The new Extreme core

I just uploaded a new extreme bitfile, one which does only implement one emulated instruction (loadb, using an extra cycle). Implementation of other instructions is coming next.

Again, a Papilio One, S3E250, at 96MHz, AES benchmark:

Press ENTER to start benchmark                                                   
Doing 10000 runs...                                                              
Time: 1536 milisseconds, 104166 bytes/s 

Comparison with older core, with *many* more instructions implemented:

Press ENTER to start benchmark
Doing 10000 runs...
Time: 2101 milisseconds, 76154 bytes/s

Definitely, getting somewhere :)

Alvie

Upcoming VGA interface with SRAM

Just a photo for a start ;)



full image version here

This was done with new Spartan6 boards from Gadget Factory, which include a 512KB SRAM.

Alvie