[SOLVED] JLINK_CORESIGHT_WriteDP parameter

Hello Segger Team,

I try to understand a JinkScript for the iMXRT685 which comes with the SDK from NXP.

They call JLINK_CORESIGHT_WriteDP like this:

JLINK_CORESIGHT_WriteDP(2, 0x020000f0);

According your documentation, the first parameter can be one of

• JLINK_CORESIGHT_DP_REG_IDCODE
• JLINK_CORESIGHT_DP_REG_ABORT
• JLINK_CORESIGHT_DP_REG_CTRL_STAT
• JLINK_CORESIGHT_DP_REG_SELECT
• JLINK_CORESIGHT_DP_REG_RDBUF
• JLINK_CORESIGHT_AP_REG_CTRL
• JLINK_CORESIGHT_AP_REG_ADDR
• JLINK_CORESIGHT_AP_REG_DATA
• JLINK_CORESIGHT_AP_REG_BD0
• JLINK_CORESIGHT_AP_REG_BD1
• JLINK_CORESIGHT_AP_REG_BD2
• JLINK_CORESIGHT_AP_REG_BD3
• JLINK_CORESIGHT_AP_REG_ROM
• JLINK_CORESIGHT_AP_REG_IDR

Which of those constants is related to the Index two?

Thanks and regards

Hello Fabian,

thank you for your feedback.

What do you mean with usually? Is this dependent to the used controller?

NXP is using ‘JLINK_CORESIGHT_WriteDP’ regular with a number instead of the symbolic constants, therefore is it possible to get a full list with the relates indices?

Thanks, and best regards

Hello Fabian,

the Indexes you are using for JLINK_CORESIGHT_WriteDP seems not to be related to the addresses of the registers which you can find in the ARM specification.
Compare https://developer.arm.com/documentation/…cific-registers

The Register Addresses are

Therefore, it would be good to have the values in the documentation

Best regards

Hello Fabian,

thanks for the Update.

ARM is only referring to the Address in the documentation. Segger is using an Index. The correlation between both was unclear to me.

Best Regards

Hello Fabian,
no further questions, thank you
Best regards