BringUp issue of LS1020A platform

[nagireddychitta]

Hi All,

We are bringing-up the custom board with LS1020A SoC.

We are using "CodeWarrior TAP" debugger to flash the images, but initially as the board is empty the connection is not going thru.

I would like to know how to make the connection and configure the Debugger to take the RCW and Flash it on NOR flash..

As i read the community forums, there seems to be an option to enable 'Hard Coded RCW" and then proceed with programming actual RCW into NOR Flash, but i am not clear on how to do this. Is it something we need to provide an option on the board?

I am currently stuck with this and any help in this regard would be really appreciated.

Best Regards,

Nagi

[yipingwang]

Hello Nagi,

The latest CodeWarrior for ARM v7 supports the feature that configures the RCW source location through CodeWarrior CCS, CCS configures index 0 register to configure RCW source, for example write this register as 0x9B.

You could consider about the following methods to configure your target to hard-coded RCW.

1. Configure hardware pins cfg_rcw_src[0:n].

2. Use hard-coded RCW on the target directly.

Please use CodeWarrior JTAG configuration file, please refer to the section "8.3 Setting up a remote system to use a JTAG configuration file" in the document C:\Freescale\CW_ARMv7_v10.0.7\ARMv7\Help\PDF\CW_ARMv7_Targeting_Manual.pdf.

Please refer to the attached JTAG configuration file.

3. Configure rcw source as hard-coded and use your own configuration to override it through write RCWSR on the target.

Please refer to and  modify the JTAG configuration file in C:\Freescale\CW_ARMv7_v10.0.7\ARMv7\ARM_Support\Configuration_Files\jtag_chains.

Have a great day,
Yiping

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[addiyi]

Hi Nagi,

As Sinan Akman mentioned, one way to connect to the board in absent of RCW is to set the board for hardcoded RCW. But, if the you have a custom board and you don't have the signal for hardcoded RCW to a switch or something like this and you use LS1020A Rev2,  you can use RCW override feature from CodeWarrior. Please take a look on AN5148, Chapter 4 Board Recovery. It is about SD card programming, but the RCW override is applicable also for NOR.

Adrian

[sinanakman]

Hi Nagi

In the absence of RCW on a new board, hard-coded RCW source can be used

to boot the board. Of course the supplied RCW values should be adequate for

the board. There are several ways of doing this : it can be provided via the

boot strapping rcw_src pins or it can be supplied by a JTAG debugger during

reset. I have a different JTAG debugger here (BDI3000 from Abatron) and I

am able to do this by defining a hard-coded rcw_src in the config file. I don't

know how you would do this using CWTAP. I am sure there is a way and

hopefully someone from FSL/NXP would provide you some help on this.

Regards

Sinan Akman