Hi,

I'm using STemWin 5.22 and the display based on ILI9481 controller in 16BPP mode.

Here is the part of my init sequence:

Source Code

1. #define XSIZE_PHYS 480#define YSIZE_PHYS 320#define ORIENTATION GUI_SWAP_XY#define COLOR_CONVERSION GUICC_565#define DISPLAY_DRIVER GUIDRV_FLEXCOLOR#define NUM_BUFFERS 1 // Number of multiple buffers to be used#define NUM_VSCREENS 1 // Number of virtual screens to be used
3. void LCD_X_Config(void) {{
4. GUI_DEVICE * pDevice; CONFIG_FLEXCOLOR Config = {0}; pDevice = GUI_DEVICE_CreateAndLink(DISPLAY_DRIVER, COLOR_CONVERSION, 0, 0);LCD_SetSizeEx (0, YSIZE_PHYS, XSIZE_PHYS);LCD_SetVSizeEx(0, YSIZE_PHYS * NUM_VSCREENS, XSIZE_PHYS);
6. Config.Orientation = ORIENTATION;Config.NumDummyReads = 1;Config.RegEntryMode = 0;GUIDRV_FlexColor_Config(pDevice, &Config);
8. PortAPI.pfWrite16_A0 = LCD_X_8080_16_Write00_16;PortAPI.pfWrite16_A1 = LCD_X_8080_16_Write01_16;PortAPI.pfWriteM16_A1 = LCD_X_8080_16_WriteM01_16;PortAPI.pfReadM16_A1 = LCD_X_8080_16_ReadM01_16;GUIDRV_FlexColor_SetFunc(pDevice, &PortAPI, GUIDRV_FLEXCOLOR_F66709, GUIDRV_FLEXCOLOR_M16C0B16);

Everything's perfectly fine as far as I don't try to move cursor (which tries to read back pixels).
When I move it, the multicolor traces appear.

By reading the documentation I found the following:

GUIDRV_FlexColor_SetReadFunc66709_B16()

Description

Sets the function(s) to be used for reading back pixel data.

Prototype

void GUIDRV_FlexColor_SetReadFunc66709_B16(GUI_DEVICE * pDevice, int Func);

Permitted values for parameter Func

GUIDRV_FLEXCOLOR_READ_FUNC_I

3 cycles and data conversion required.

(default)

GUIDRV_FLEXCOLOR_READ_FUNC_II 2 cycles and no conversion required.

So emWin uses 3 cycle read by default for my controller. I can't switch the controller to this mode as it has single selection of interface mode for both read and write. It would be nonsense to slow down draw operations 2 times. So the only option I have is to switch emWin.

I tried


with no success. The only consequence of this call is the change of multicolor cursor traces into black...

I tried to set breakpoint at my LCD_X_8080_16_Write00_16 and LCD_X_8080_16_ReadM01_16 functions to determine what's happening...

The result is:
1. If I don't make

Source Code

1. GUIDRV_FlexColor_SetReadFunc66709_B16(pDevice,GUIDRV_FLEXCOLOR_READ_FUNC_II)

call (or if I do

Source Code

1. GUIDRV_FlexColor_SetReadFunc66709_B16(pDevice,GUIDRV_FLEXCOLOR_READ_FUNC_I - it does not matter)

), emWin follows ILI9481 spec: it sends read command then reads

2.

If I make

Source Code

1. GUIDRV_FlexColor_SetReadFunc66709_B16(pDevice,GUIDRV_FLEXCOLOR_READ_FUNC_II)

call , emWin stops following the spec: it skips read command and just reads (which seems like a emWin bug)