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BSP Developer’s Guide, 6.0

116

Board Bringup

During board bringup, the target hardware is still under development. Because of

this, some components of the board may not yet be included, and others may not

be complete. The major aspects of board initialization are determined at this stage.

Once board bringup is complete, the hardware is fully stable. At this point, an

OCD register file is typically available to initialize the board. This register file is

used during subsequent BSP development.

Downloaded Image

When the board initialization sequence is determined and a register file is

available, general BSP development begins. At this point, you can:

■

Create an image on the host using your chosen compiler and tools.

■

Download the resulting image to the target using the OCD device.

■

Optionally, set a breakpoint before execution begins.

■

Initiate execution of the image with the OCD device.

■

Perform normal debugging.

Boot ROM Image

The BSP is not complete until it can execute from a system without the assistance

of the OCD device. At some point, a boot image is loaded into flash. This image

initializes the CPU and, typically, copies the final image to RAM for execution.

There are several issues associated with debugging a flash image with an OCD

device, primarily related to setting breakpoints and to the location that the OCD

device uses to obtain symbols for debugging purposes. These are discussed in

4.3 Advanced Debugging Techniques, p.126.

4.2 Basic Debugging Techniques

This section describes some basic debugging methods that can be used with

readily available tools such as on-board LEDs, NVRAM, and ROM monitors.

These methods do not rely on an on-chip debugging (OCD) solution. For

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RAM 6.0 BUX II Series Guía de usuario Pagina 124