102 CHAPTER 3 J-Link software and documentation package
J-Link / J-Trace (UM08001) ©
2004-2017 SEGGER Microcontroller GmbH & Co. KG
Description
Starts the target CPU.
Example
> monitor go
3.3.3.9 halt
Syntax
halt
Description
Halts the target CPU.
Example
> monitor halt
3.3.3.10 interface
Note: Deprecated. Use command line option -if instead.
Syntax
interface <InterfaceIdentifier>
Description
Selects the target interface used by J-Link / J-Trace.
3.3.3.11 jtagconf
Syntax
jtagconf <IRPre> <DRPre>
Description
Configures a JTAG scan chain with multiple devices on it. <IRPre> is the sum of
IRLens of all devices closer to TDI, where IRLen is the number of bits in the IR
(Instruction Register) of one device. <DRPre> is the number of devices closer to TDI.
For more detailed information of how to configure a scan chain with multiple devices
please refer to See “Determining values for scan chain configuration” on page 183..
Note: To make sure the connection to the device can be established correctly, it
is recommended to configure the JTAG scan chain via command line options at the
start of GDB Server.
Example
#Select the second device, where there is 1 device in front with IRLen 4
> monitor jtagconf 4 1
3.3.3.12 memU8
Syntax
MemU8 <address> [= <value>]
Description
Reads or writes a byte from/to a given address. If <value> is specified, this com-
mand writes the value to the given address. Otherwise this command reads from the
given address.
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