request for a simple draw demo

[YordanYanakiev]

If it is possible I would like to have a simple demo regarding just drawing a few random dots or lines in the loop.

The point is to clearly understand the way it is supposed to be done this. As simplest as possible will do.

[bytefresser]

You can see it in example simpleterminalout. Check demo4.

[YordanYanakiev]

I am not sure where is this "demo4" file. Could You provide a link please?

[karlTH]

in this exemple https://github.com/fdivitto/FabGL/blob/master/examples/SimpleTerminalOut/SimpleTerminalOut.ino

[YordanYanakiev]

tried it, as well other demos, none seem to be working on my setup due some reason unknown:

#include "fabgl.h"

#if USE_8_COLORS
#define VGA_RED    GPIO_NUM_17
#define VGA_GREEN  GPIO_NUM_16
#define VGA_BLUE   GPIO_NUM_4
#define VGA_HSYNC  GPIO_NUM_15
#define VGA_VSYNC  GPIO_NUM_2
#elif USE_64_COLORS
#define VGA_RED1   GPIO_NUM_22
#define VGA_RED0   GPIO_NUM_21
#define VGA_GREEN1 GPIO_NUM_19
#define VGA_GREEN0 GPIO_NUM_18
#define VGA_BLUE1  GPIO_NUM_5
#define VGA_BLUE0  GPIO_NUM_4
#define VGA_HSYNC  GPIO_NUM_23
#define VGA_VSYNC  GPIO_NUM_15
#endif

// the setup function runs once when you press reset or power the board
void setup() 
{
    Serial.begin( 115200 ); delay( 500 ); Serial.write( "\n\n\n" ); // DEBUG ONLY

#if USE_8_COLORS
    VGAController.begin( VGA_RED, VGA_GREEN, VGA_BLUE, VGA_HSYNC, VGA_VSYNC );
#elif USE_64_COLORS
    VGAController.begin( VGA_RED1, VGA_RED0, VGA_GREEN1, VGA_GREEN0, VGA_BLUE1, VGA_BLUE0, VGA_HSYNC, VGA_VSYNC );
#endif

    VGAController.setResolution( VGA_640x400_70Hz, 640, 400 );
    //VGAController.setResolution(VGA_640x240_60Hz);    // select to have more free memory

    // this speed-up display but may generate flickering
    VGAController.enableBackgroundPrimitiveExecution( false );

}

// the loop function runs over and over again until power down or reset
void loop() 
{
    demo4();
}

void demo4()
{

    for( int i = 0; i < 500; ++i )
    {
        Canvas.setPenColor( random( 4 ), random( 4 ), random( 4 ) );
        Canvas.setPixel( random( 640 ), random( 350 ) );
        delay( 15 );
    }
    delay( 500 );

    for( int i = 0; i < 50; ++i )
    {
        Canvas.setPenColor( random( 4 ), random( 4 ), random( 4 ) );
        Canvas.drawLine( random( 640 ), random( 350 ), random( 640 ), random( 350 ) );
        delay( 50 );
    }
    delay( 500 );

    for( int i = 0; i < 50; ++i )
    {
        Canvas.setPenColor( random( 4 ), random( 4 ), random( 4 ) );
        Canvas.drawRectangle( random( 640 ), random( 350 ), random( 640 ), random( 350 ) );
        delay( 50 );
    }
    delay( 500 );

    for( int i = 0; i < 50; ++i )
    {
        Canvas.setPenColor( random( 4 ), random( 4 ), random( 4 ) );
        Canvas.drawEllipse( random( 640 ), random( 350 ), random( 640 ), random( 350 ) );
        delay( 50 );
    }

}

[bytefresser]

Select 8 or 64color configuration. Check the first lines in the example.

[YordanYanakiev]

I've did it as noted, yet I can not make it works. it is working flawlessly on other similar library with the same configuration anyway.

On Thu, 30 May 2019 at 21:58, Adrian Lorenz notifications@github.com wrote:

Select 8 or 64color configuration. Check the first lines in the example.

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-- Yordan Yanakiev design & software architectures

[fdivitto]

it is working flawlessly on other similar library with the same configuration anyway. …

...for example? Which library? Can you post the schema you have used?

[YordanYanakiev]

Sorry for the late answer fdvitto. Here the circuit i am using: ( V+ goes to 5V, V- goes to GND ) As well I have a question: Can we use the library in a thread working on 1st or second core with xTaskCreatePinnedToCore ? I am using currently "https://github.com/bitluni/ESP32Lib" library, anyway i wonder if there is a faster or/and is there one which works in a thread.

[fdivitto]

You've chosen 8 colors mode, so you have to set:

define USE_8_COLORS 1

define USE_64_COLORS 0

[YordanYanakiev]

It is set on 8 color mode. just when i were copy-pasting probably didn't copy it.

On Tue, 4 Jun 2019 at 09:08, Fabrizio Di Vittorio notifications@github.com wrote:

You've chosen 8 colors mode, so you have to set:

define USE_8_COLORS 1

define USE_64_COLORS 0

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/fdivitto/FabGL/issues/14?email_source=notifications&email_token=ABR3IN44ZCWNR6EMT2Z2YETPYYBFXA5CNFSM4HRC3SH2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODW3QSDA#issuecomment-498534668, or mute the thread https://github.com/notifications/unsubscribe-auth/ABR3IN5P6O3RUNFIVINJDZ3PYYBFXANCNFSM4HRC3SHQ .

-- Yordan Yanakiev design & software architectures

[fdivitto]

Ok, at this point I just don't know why it doesn't work and you haven't said yet which "similar" library works. There are several possibilities still to explore: one of these is to check the ESP32 revision number. It must be rev-1 (not 0).

Il giorno 4 giu 2019, alle ore 12:31, Yordan Yanakiev notifications@github.com ha scritto:

It was set on 8 color mode. just when i were copy-pasting probably didn't copy it.

On Tue, 4 Jun 2019 at 09:08, Fabrizio Di Vittorio notifications@github.com wrote:

You've chosen 8 colors mode, so you have to set:

define USE_8_COLORS 1

define USE_64_COLORS 0

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub https://github.com/fdivitto/FabGL/issues/14?email_source=notifications&email_token=ABR3IN44ZCWNR6EMT2Z2YETPYYBFXA5CNFSM4HRC3SH2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODW3QSDA#issuecomment-498534668, or mute the thread https://github.com/notifications/unsubscribe-auth/ABR3IN5P6O3RUNFIVINJDZ3PYYBFXANCNFSM4HRC3SHQ .

-- Yordan Yanakiev design & software architectures — You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/fdivitto/FabGL/issues/14?email_source=notifications&email_token=ACKNPCRUVGUT5UONQPKTKG3PYY77VA5CNFSM4HRC3SH2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODW4EO7Q#issuecomment-498616190, or mute the thread https://github.com/notifications/unsubscribe-auth/ACKNPCRLBNO4IUEY25RCR5TPYY77VANCNFSM4HRC3SHQ.

[YordanYanakiev]

I am using "https://github.com/bitluni/ESP32VGA" with the very same config for bit color. The revision of the SDK is 2

[fdivitto]

I meant chip revision (rev0 doesn't work, rev 1 should work).

[YordanYanakiev]

chip_info.revision returns 1

[fdivitto]

In my board I have a led connected to PIN2 (where you have VSYNC): this doesn't work for me, maybe because the LED circuit modifies VSYNC signal. This is the reason I suggest to avoid to use that PIN in (look at the bottom of the page):

http://www.fabglib.org/conf_v_g_a.html

Could this be the reason?

[YordanYanakiev]

well.. it works with the other lib.. hmm need to try somehow.. the led is blinking as a mad while it is working with the other lib, but it works.. hmm.