[Basic requirements for bare metal implementation?]

Thank you very much for the detailed reply Joel.

I did have the config file set as the demo, but I missed one thing, it's the

#define GWIN_REDRAW_IMMEDIATE                    GFXON

The redrawing mode article is help full.

Now I know what's happened, I used the original demo code first, but didn't set the heap to a large enough size, and found it's not working. then I removed the event listening lines and changed the heap size, but apparently if you don't use the geventEventWait(),  'IMMEDIATE DRAWING' must be on. So that's the reason I can't see the button drawn on the sreen.

Is there a generic guide on how mush the heap should be for an application ? I feel I a bit lost on setting the heap size. Can uGFX give an error message or something if the heap is too small ?

 

 

[Basic requirements for bare metal implementation?]

Hi,

I'm just start using uGFX and doing some 'hello world' testing. I'm using a bare metal STM32F103 mcu with ILI9341 320*240 touch LCD.

I've already got the 'benchmark' demo code running and have correct result. Now I'm trying to test a 'push button' widget, but I found I couldn't even get the button displayed on the screen.

My test code is based on the ugfx/demos/modules/gwin/button/main.c

My environment is Segger Embedded Studio and using the single gfx_mk.c file approach.

I noticed in the gfxconf.h it's said an OS is required but unfortunately bare metal is not in there, but I didn't see any OS specific code in the demo main.c, any to simplify my situation, I even disabled the event checking for the button, but I still can't get the button displayed. Is there any spcial requirements to use the widgets on a bare metal system? like calling some 'display refresh' function periodically? I couldn't find any documentation on this, anybody can help?

If you can help me on the display issue, maybe you can also tell me is there anything I should care about using the 'event' system on a bare metal? Thanks in advance.

Tim.

Following is my test code : (The uGFX logo is shown at the start, but then I only got a white screen)

int main(void) {
	init();		// this is GPIO init etc.

	GEvent* pe;
	static const gOrientation	orients[] = { gOrientation0, gOrientation90, gOrientation180, gOrientation270 };
	unsigned which;

	// Initialize the display
	gfxInit();

	// We are currently at gOrientation0
	which = 0;
	gdispSetOrientation(orients[which]);

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

	// create the widget
	createWidgets();

	// We want to listen for widget events
	//geventListenerInit(&gl);
	//gwinAttachListener(&gl);
	while(1);
}