jtagchain

Display and define the target JTAG configuration.

Syntax

jtagchain([jtag_id][,jtag_id]+)

Where:

jtag_id

is an expression resolving to a 32-bit JTAG ID

Discussion

The jtagchain function is used to both display and define the target JTAG configuration.

If no arguments are specified, then the current JTAG configuration is displayed. There is one line of display per JTAG device. If SourcePoint is not connected to a target, then an error message is displayed.

If JTAG ID values are specified, then this command defines the target JTAG configuration. The order of IDs listed indicates the order of devices on the JTAG chain. This configuration is sent to the emulator with the jtagconfigure command as part of target configuration.  See Target Configuration.

Example 1

To display the target JTAG chain:

Command input:

jtagchain()  

Result:

JTAG Chain:
id=0x0F0F0F0F, IR length=4, max jtag rate=16 Mhz, processor=0x0704-ARM720T

Example 2

To define the target JTAG chain with a single device:

Command input:

jtagchain(0x0F0F0F0F)

Related Topics:

jtagconfigure

jtagdeviceadd

jtagdeviceclear

jtagdevices

jtagscan

Target Configuration