Issue regarding DDR3

[pattem_09]

Hello

• I'm using stm32mp157aaa3 processor in our custom board.And I'm working on DDR3L with arm-trusted-firmware(V2.5) ddr3 routines as my reference code and reference manual(RM0436) and Application not(AN5168).
• When I am hard-coding the register values in arm-trusted-firmware it works fine which means my hardware is working fine,but when I'm porting the same code to bare-metal we couldn't read and write the ddr memory location and the ddr memory is not released.
• And I have also tried STM32DDRFW-UTILS.And here too i get the same issue.
• Could you please suggest me a way on how to assign memory size for ddr3l and release ddr memory in bare-metal and how to resolve the read and write issue.

 

 

Thanks&Regards

Akshitha

 

[PatrickF]

Hi @pattem_09 

Did you use STPMIC1 ? Is the related DDR3L supplies enabled (and reference/termination supplies if used) ?

Did you have setup the DDR clock in right way (PLL and HSE bypass or crystal) ?

Is there activities on DDR pins (CLK, CKE, etc...)?

Regards.