2023-12-14 02:40 AM
how Mach resource required for run led display in stm32H757i evk ?
i am working on stm32H757i evk, my actual product have not external ram.
but i have run lcd display in my project.
without external ram i can run display?
my display is not more sophisticated gui, but simple data display on lcd,
please help me guide how mach ram required for my simple gui application.
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2023-12-14 08:39 PM
Well that's 16 Mb (2 MB) not 8 Mb. So yes, that will get you two screen buffers, and some additional slack for icons, and resources.
2023-12-14 03:25 AM
Hello,
It depends on the size of your display and its resolution.
Please refer to the AN4861 "LCD-TFT display controller (LTDC) on STM32 MCUs"
2023-12-14 03:34 AM
i use
4” 480×800 TFT color LCD with MIPI DSI® interface and capacitive touch
panel.
so how Mach Ram need ?
2023-12-14 03:44 AM - edited 2023-12-14 03:45 AM
Again, please refer to the AN4861 "LCD-TFT display controller (LTDC) on STM32 MCUs" and section 4.2.1 Framebuffer memory size requirements and location. The details of the frame buffer size computation are there.
2023-12-14 03:49 AM
Much
At least 768KB for a frame buffer
Alternatively get a display with its own buffer.
2023-12-14 04:14 AM
i have already 8 mb extern sram are connected and i use stm32H757 microcontroller and my display is
4” 480×800 TFT color LCD with MIPI DSI® interface and capacitive touch.
and my gui is simple data display on lcd, that 8mb external ram is sufficient ?
ya need 32 mb external sdram ?
please guide me
2023-12-14 05:30 AM
8MB (64Mb) would be more than sufficient to sustain the display.
I'd probably go with 32-bit wide bus.
Cost difference for larger SDRAM might be somewhat marginal. Pick parts which ship in large volumes, and have long-term availability.
2023-12-14 08:30 PM
sorry but i have only 1M x16bit (IS61WV102416BLL-10MLI ) sram memory in my board.
that sufficient to sustain the display.?
2023-12-14 08:39 PM
Well that's 16 Mb (2 MB) not 8 Mb. So yes, that will get you two screen buffers, and some additional slack for icons, and resources.