Code Located in Flash / ROM, Code Development

7.CODE DEVELOPMENT

7.1. HMON

7.1.1.MODE SUPPORT

The HMON library is built to support Normal Mode only.

7.1.2.BREAKPOINT SUPPORT

The monitor utilises the Address Break Controller for code located in ROM, allowing a single breakpoint to be set in the code. Code located in RAM may have multiple breakpoints limited only by the size of the On-Chip RAM.

Due to a limitation of the internal address break controller, a breakpoint set in ROM will execute the instruction at the breakpoint and stop on the subsequent op-code.

7.1.2.1.CODE LOCATED IN FLASH / ROM

Double clicking in the breakpoint column in the code sets the breakpoint. Adding a further breakpoint in the code removes the previous one. A warning message will be displayed in the message window when this occurs.

7.1.2.2.CODE LOCATED IN RAM

Double clicking in the breakpoint column in the code sets the breakpoint. Breakpoints will remain unless they are double clicked to remove them.

7.1.3.HMON CODE SIZE

HMON is built along with the debug code. Certain elements of the HMON code must remain at a fixed location in memory. The following table details the HMON components and their size and location in memory. For more information, refer to the map file when building code.

Section	Description	Start Location	Size
			(H’bytes)

RESET_VECTOR	HMON Reset Vector (Vector 0)	H’ 0000	2
	Required for Startup of HMON
TRAP_VECTORS	Trap Vectors (Vector 8, 9, 10, 11)	H’ 0010	8
	Required by HMON to create Trap Breakpoints in RAM
HW_BREAK_VECTORS	HMON Break Controller (Vector 12)	H’ 0018	2
	Required by HMON to create Breakpoints in ROM
SCI_VECTOR	HMON Serial Port Vectors (Vector 23)	H’ 002E	2
	Used by HMON when EDK is configured to connect to the
	default serial port.
PHMON	HMON Code	H’ 1000	2C3D
CHMON	HMON Constant Data	H’ 2C3E	2D10
BHMON	HMON Uninitialised data	H’ FC80	1FD
FDTInit	FDT User Mode Kernel.	H’ 0400	F7
	This is at a fixed location and must not be moved. Should the
	kernel need to be moved it must be re-compiled.
FDTUserModeMicroKernel	FDT User Mode Kernel.	H’ 0500	6CC
	This is at a fixed location and must not be moved. Should the
	kernel need to be moved it must be re-compiled.
CUser_Vectors	Pointer used by HMON to point to the start of user code.	H’ 0C00	4*

* CUserVectors is a long word location with the upper 16 bits set to zero.