[TODO] GWIN Console scroll strange behavior

[Smd]

Hello

I have one console and one slider.

In the main loop, a character is inserted in console. GT1 timer update the slider current position.

With #define GDISP_NEED_SCROLL TRUE defined in gfxconf.h , from time to time I can see a missing character on console, right after console scroll.

If I move slider position fast, I see more lines with missing first character, and sometime touchscreen stop responding, until hardware restart of the board.

#include "gfx.h"

GTimer GT1;
static GHandle   	ghConsole;
static GHandle		ghSlider1;

uint8_t i=0;

 void callback1(void* arg) {
    (void)arg;
		gwinSliderSetPosition(ghSlider1,i);
 }


static void createWidgets(void) {
	GWidgetInit	wi;

	// Apply some default values for GWIN
	wi.customDraw = 0;	wi.customParam = 0;	wi.customStyle = 0;	wi.g.show = TRUE;

	// Create the console
	wi.g.width = 50;	wi.g.height = 200;	wi.g.y = 20;	wi.g.x = 20;
	ghConsole = gwinConsoleCreate(NULL, &wi.g);

	// Set the console colors
	gwinSetColor(ghConsole, Yellow);
	gwinSetBgColor(ghConsole, Black);

 	// create Slider1
	wi.g.width = 50;	wi.g.height = 200;	wi.g.y = 20;	wi.g.x = 100;	wi.text = "";
	ghSlider1 = gwinSliderCreate(NULL, &wi);
	gwinSliderSetRange(ghSlider1,0,255);	

	// Clear the console
	gwinClear(ghConsole);
}

int main(void) {

	// Initialize the uGFX and the underlying system
	gfxInit();

	// Set the widget defaults
	gwinSetDefaultFont(gdispOpenFont("UI2"));
	gwinSetDefaultStyle(&WhiteWidgetStyle, FALSE);
	gdispClear(White);

	// Attach the mouse input
	gwinAttachMouse(0);

	// Create the widget
	createWidgets();

  // initialize the timer
  gtimerInit(&GT1);

	//continious mode - callback1() called without any argument every 250ms 
  gtimerStart(&GT1, callback1, NULL, TRUE, 100);

	while (1) {
		gwinPutChar(ghConsole,'0'+i%10);
		gfxSleepMilliseconds(100);
		i++;
	}

	return 0;
}

Does anyone can help me to understand what's wrong ?

Kind Regards,

Smd

[Joel Bodenmann]

Hello Smd,

It will take some time until I can take care of this. Could you please leave some more information in the meantime:

• Which µGFX version/git master are you using?
  
• What is your hardware setup? (board/MCU, display controller)
  
• What compiler are you using? (inc. version)

~ Tectu

[Smd]

Hi Tectu,

- latest uGFX from git clone https://bitbucket.org/Tectu/ugfx.git

- I use a custom board with STM32F103ZET6, and 320x240 TFT with SSD1289 controller

- I use the GNU Tools ARM Embedded 4.7 2013q2 from ChibiStudio

Kind Regards,

Smd

[Joel Bodenmann]

Okay, I put it on my ToDo list, but I cannot tell you when I get to it as I am currently in heavy exams trouble.

I assume just disable the scroll macro should work out for you in the meantime.

~ Tectu

[inmarket]

I have an idea on what might be going on.

Can you please define GDISP_NEED_CLIP as FALSE in your gfxconf.h file and see if the symptoms continue.

I suspect it is a multi-threading issue with the way that gwin uses the clipping calls.

If the symptoms dissappear i know what needs to be done to fix it properly.

[Smd]

Hi

I tried with GDISP_NEED_CLIP as FALSE in gfxconf.h and the symptoms continue.

Kind Regards,

Smd

[Joel Bodenmann]

This may take some time... Please be patient.

~ Tectu