User guide

Getting Started

where path is the directory (

C:\temp

for example) that contains the boot

monitor image.

• To load the image to NOR flash 1, at the Boot Monitor prompt enter:

>FLASH

Flash> WRITE IMAGE path\Boot_Monitor.axf NAME boot_monitor

FLASH_ADDRESS 0x34000000

where path is the directory (

C:\temp

for example) that contains the boot

monitor image.

Note

Very long path names can cause problems with semihosting. To avoid this, move

the image to a temporary directory.

9. Loading the image into flash takes a few minutes to complete. Wait until the

prompt is displayed again before proceeding.

10. Turn the board off and then on.

Boot Monitor starts automatically.

2.6.4 Redirecting character output to hardware devices

The redirection of character I/O is carried out within the Boot Monitor platform library

routines in

retarget.c

and

boot.s

. During startup, the platform library executes a

SoftWare Interrupt instruction (SWI). If the image is being executed without a debugger

(or the debugger is not capturing semihosting calls) the value returned by this SWI is

–1, otherwise the value returned is positive. The platform library uses the return value

to determine the hardware device used for outputting from the C library I/O functions.

(Redirection is through a SWI to the debugger console or directly to a hardware device)