Multiple Buffer

kostprof21 · Oct 13th 2016, 2:02pm

Can I use Multiple Buffer with GUIDRV_FLEXCOLOR?
If so, how? I have not found an example for such a bundle.

I use stm32f407 with ssd1963 controller. Display 480x272

SEGGER - Schoenen · Oct 14th 2016, 3:10pm

Hi,

Multibuffering is not available for this kind of driver.

But you can use a chached version of your driver. Simply call GUIDRV_FlexColor_SetFunc() with e.g. GUIDRV_FLEXCOLOR_M16C1B16 as pfMode.
Like:

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GUIDRV_FlexColor_SetFunc(pDevice, &PortAPI, GUIDRV_FLEXCOLOR_F66708, GUIDRV_FLEXCOLOR_M16C1B16);

GUIDRV_FLEXCOLOR_M16C0B16 - ...C0.. is without cache and
GUIDRV_FLEXCOLOR_M16C1B16 - ...C1.. is with cahce

Any drawing will be done into the cache before sending it to the LCD.

The Window Manager does this automatically. If you don't use the Window Manager you have to call

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LCD_ControlCache(LCD_CC_LOCK)

before the drawing operation and

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LCD_ControlCache(LCD_CC_UNLOCK)

after the drawing to flush the content of the cache to the LCD.

Regards,
Sven

kostprof21 · Oct 26th 2016, 7:05am

Thanks for the answer. I'll try.

Thanks for the answer. I'll try
I'm going to use most of the display memory for drawing, since I have a lot of free memory in ssd1963. Will it work? Or you need to put external memory?.
p.s. Sorry for my English

SEGGER - Schoenen · Oct 28th 2016, 2:56pm

Hi,

If you are using a chached version of the driver cache will be on MCU side and not on the LCD side. The size of the cahche depends on the LCD size and the used color depths.

Regards,
Sven

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C Source Code

C Source Code

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