About qyx

qyx · 2022-03-25

Hi,on a custom board with a STM32MP153AABxx and a W63AH6NBV 1Gbit LPDDR3 memory I am failing to initialise the DDR properly. I made the required changes to the upstream u-boot device tree files, added support for UART8 debug console and some minor th...

qyx · 2022-03-28

I am using CubeMX 6.5, downloaded a fresh one. I tried both your DTS files with similar results. So I changed the DDR clock to 200 MHz, somehow managed to generate the correct DTS and modified DDR test 3 to get some insight to what can be read from t...

qyx · 2022-03-28

Thanks for confirming the schematic is correct. Yes, DDR_VREF is connected to STM32MP15x too.I tried regenerating the DTS again, this is the output of CubeMX:/* * Copyright (C) 2015-2018, STMicroelectronics - All Rights Reserved * * SPDX-License-I...

qyx · 2022-03-28

Thank you for the reply, @PatrickF I have read the mentioned app notes, the only thing I overlooked is the 100R termination resistor on CLKN/CLKP. I added it directly on vias under the LPDDR3 chip now but still no luck.Regarding the software, u-boot...

qyx · 2022-03-26

An update, CubeMX DDR test suite is not working simply because the tuning support was removed from the SPL (ref. https://patchwork.ozlabs.org/project/uboot/patch/20211115153214.3.I4594adfd3e69b68a60bdbb2697ae8b97c9f3e8f5@changeid/). This renders the ...

User statistics

User Activity

Cannot access LPDDR3 memory from a STM32MP153AABxx

Re: Cannot access LPDDR3 memory from a STM32MP153AABxx

Re: Cannot access LPDDR3 memory from a STM32MP153AABxx

Re: Cannot access LPDDR3 memory from a STM32MP153AABxx

Re: Cannot access LPDDR3 memory from a STM32MP153AABxx