NXP emWin multilayer issue

[claudio_legena]

Hello I've tried to configure the NXP emWin example for the i.mxrt1170 evaluation board as  multilayer, 

the following steps have been done:

1) in GUIConf.h set the  GUI_NUM_LAYERS 2

2) emWin_support.c configured in LCD_X_Config(void) :

pPointer = GUI_DEVICE_CreateAndLink(DISPLAY_DRIVER, COLOR_CONVERSION, 0, 1);
#ifdef ORIGINAL_FIRMWARE // modified by C.L.
LCD_SetSizeEx(0, LCD_WIDTH, LCD_HEIGHT);
LCD_SetVSizeEx(0, LCD_WIDTH, LCD_HEIGHT);
#endif
if (LCD_GetSwapXY()) {
LCD_SetSizeEx (0, LCD_HEIGHT, LCD_WIDTH);
LCD_SetVSizeEx(0, LCD_HEIGHT, LCD_WIDTH);
} else {
LCD_SetSizeEx (0, LCD_WIDTH, LCD_HEIGHT);
LCD_SetVSizeEx(0, LCD_WIDTH, LCD_HEIGHT);
}
LCD_SetVRAMAddrEx(0, (void *)VRAM_ADDR);
LCD_SetVisEx(0,1);
// set the layer 1
pPoint = GUI_DEVICE_CreateAndLink(DISPLAY_DRIVER, COLOR_CONVERSION, 0, 1);
if (LCD_GetSwapXY()) {
LCD_SetSizeEx (1, LCD_HEIGHT, LCD_WIDTH);
LCD_SetVSizeEx(1, LCD_HEIGHT, LCD_WIDTH);
} else {
LCD_SetSizeEx (1, LCD_WIDTH, LCD_HEIGHT);
LCD_SetVSizeEx(1, LCD_WIDTH, LCD_HEIGHT);
}
LCD_SetVRAMAddrEx(1, (void *)VRAM_ADDR);
LCD_SetVisEx(1,1);

but the layer 1 has never been created and the pointer returns weird data.... Has someone same issues? Is there  a specific library libemWin_M7.a configured just for one layer?

In the attached pictures the returns value for the Layer0 correctly created and Layer1 that doesn't work.

Thanks

[claudio_legena]

hi Tic thanks for your reply, of course we'll check for others solution, in order to use the multilayer features

[jeremyzhou · Accepted solution]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
NXP has provided the emWin library which supports the Multi-layer and multi-display, however, there are no similar demos that utilize the above feature in the SDK library.
After having a brief review of your code, I don't think it works since LCD_X_DisplayDriver is only able to handle layer 0.
The LCDIFv2 module supports up 8 layers, so the emWin is able to use the Multi-layer feature based on the LCDIFv2 module, however, to be honest, it'll cost time to implement the modification of the emwin_gui_demo_cm7 demo.
And I'll report the software demand to the SDK team later.
Have a great day,
TIC

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