How transfer data from flash memory (QSPI) to SDRAM (parallel ) ?

[Milan Cece]

Posted on April 21, 2017 at 23:33

Hi

I use STM32f779  and i have TFT LCD 800x480   controller tft is 

RA8875 .  I want to transfert my images to flash after i need to transfert to SDRAM  and transfert to controller RA8875 .   Can you help me how transfer the images to flash (QSPI )  S25FL256SAGNFI001 to SDRAM  AS4C16M16SA-6TIN . I think that i need to use DMA2D peripheric  but i am not sure .

my tft LCD is  : 

/external-link.jspa?url=http%3A%2F%2Fwww.buydisplay.com%2Fdefault%2F7-inch-lcd-module-capacitive-touch-screen-panel-i2c-spi-serial

 

Thanks   

#memory #qspi #sdram #flash

[S.Ma]

Posted on April 22, 2017 at 13:36

Display driver with touch support has an SPI interface and the controller has its own internal frame buffer.

It's a difficult question because it depends on what type of graphics library will be used and at what refresh rate the video frame will change (video movies?) and if mostly the whole screen is refresh or mostly partial rectangle areas... motion artifacts (double buffer with swap on Vblank)

So the answer might be 'it depends' especially if the display controller has drawing primitives by HW commands...

[Tesla DeLorean]

Posted on April 22, 2017 at 13:44

Duplicate Thread

https://community.st.com/0D50X00009XkXvLSAV