How transfer info from flash QSPI to SDRAM .

[Milan Cece]

Posted on April 21, 2017 at 23:20

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  : 

http://www.buydisplay.com/default/7-inch-lcd-module-capacitive-touch-screen-panel-i2c-spi-serial

 

Thanks   

[S.Ma]

Posted on April 22, 2017 at 13:23

Writing data to serial flash will require drivers (erase sector, program, verify).

QSPI Flash peripheral has a HW Read-mapping assist (compared to SD Card SDIO interface) which means that it is possible to READ the flash as if it was directly mapped in the STM32 memory space, allowing DMA transfers.

[Tesla DeLorean]

Posted on April 22, 2017 at 13:43

Duplicate Thread

https://community.st.com/0D50X00009XkXvKSAV

Bus mapped QSPI (like the DISCO boards) should be accessible with pointers and could memcpy() from QSPI to SDRAM

[Milan Cece]

Posted on April 22, 2017 at 15:34

If some one can show me the examples  or recipe how to do that or  documents . I not have any video  . I just have dynamics buttons  and data ADC .  

[john doe]

Posted on April 22, 2017 at 18:27

https://github.com/Javier-varez/STM32F7Discovery_QSPI_Programmer

[Tesla DeLorean]

Posted on April 22, 2017 at 17:02

STM32Cube_FW_F7_V1.2.0\Projects\STM32746G-Discovery\Examples\QSPI

Newer version probably have broader coverage