DDR initialization

[abi01]

I'm running baremetal sample that comes with CW (File->New->ARMv8 Stationery->Hello World C Project) for LS1012A device (freedom board + cmsis-dap). Target init script execution is disabled:

I would like to know where is the code that performs DDR initialization located, since target init file is a python script which is not executed according to the screenshot? 

[addiyi]

The ddr initialization is located only in python script.

Adrian

[abi01]

Ok, but the sample is operational even if target initialization file is not executed (see screenshot from the previous post). 

So my conclusion was that the DDR is initialized also somewhere else. Can you please explain how is this possible?

[addiyi]

Do you have uboot running on your board? Check in Debug configuration > Startup you have Reset and Delay = 0 selected and also Halt selected. Using this config you can be sure that nothing (in this case uboot) is initialize the ddr and the code will not be able to be downloaded into ddr.

Adrian

[abi01]

I have a default configuration: baremetal sample template that comes with CW and target board(frdm) out of the box. Here is my startup config:

The sample starts working when I unchecked target initialization file. Until then it doesn't. 

[addiyi]

Usage of cmsis-dap will generate a reset skid, meaning the core cannot be stopped immediately. Becasue of this uboot have time to run ddr initialization.

You can use a CWTAP to avoid reset skid or detele the uboot on your board.

Adrian