ULINK2 User's Guide

Debug

The Debug section controls caching, downloading, and device resetting options applied each time a debugging session is started.

Connect & Reset Options
control the instructions executed while connecting to target.

Connect controls the connection conditions.

• Connect — Normal stops the CPU at the currently executed instruction after connecting.
• Connect — with Pre-reset applies a hardware reset(HW RESET) before connecting to the device.
• Connect — under Reset holds the hardware reset(HW RESET) signal active while connecting to the device. Use this option when the user program disables the JTAG/SW interface.

Reset controls the RESET operations.

• Reset — HW RESET performs a hardware reset by asserting the hardware reset (HW RESET) signal.
• Reset — SYSRESETREQ performs a software reset by setting the SYSRESETREQ bit. The Cortex-M core and on-chip peripherals are reset.
• Reset — VECTRESET performs a software reset by setting the VECTRESET bit. Only the Cortex-M core is reset. The on-chip peripherals are not affected. For some Cortex-M devices, VECTRESET is the only way to reset the core. VECTRESET is not supported on Cortex-M0 and Cortex-M1 cores.
• Reset — Autodetect selects one of the above reset methods based on the target device. The SYSRESETREQ method is used if an unknown device is detected.

Reset after Connect performs a reset operation after connecting to the target. If disabled, the debugger stops the CPU at the currently executed instruction after connecting to target.

Stop after Bootloader stops the CPU after executing the bootloader instructions.

Cache Options
improve the performance of the µVision Debugger by caching target memory areas in the PC memory. By default, these options are enabled to get maximum performance.

• Cache Code informs the debugger that the downloaded program code will not change. When this option is set, µVision never reads the program code from the target system. Disable this option if the application includes self-modifying code or if the program code might get overwritten.
• Cache Memory determines whether memory displays are updated during a program stop. When this option is set, the debugger does not update memory displays until the next single-step, procedure-step, or go-command is executed. Disable this option to see the actual memory content (for example, the content of memory mapped peripherals) when the debugger is halted.

Download Options
control the downloading of code to the target system when the debugger starts.

• Verify Code Download compares the content of the target memory with the application program loaded in the µVision Debugger. Enable this option to ensure program correlation between the target system and µVision.
• Download to Flash downloads code to all memory regions. When disabled, the debugger does not download code to the memory address ranges defined in the dialog Flash Download Setup. Enable the option if the application is loaded into RAM and the Flash algorithm is defined for the same address range. By default, this option is disabled. Refer to the knowledgebase article µVision Debugger: Error 57: Illegal Address in Debugger Output Window.