NXP Semiconductors LPC24XX UM10237 - Manual (Page 753)

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User manual Rev. 04 — 26 August 2009 753 of 792
NXP Semiconductors
UM10237
Chapter 35: LPC24XX RealMonitor
4.10 RMTarget initialization
While the processor is in a privileged mode, and IRQs are disabled, user must include a
line of code within the start-up sequence of application to call rm_init_entry().
4.11 Code example
The following example shows how to setup stack, VIC, initialize RealMonitor and share
non vectored interrupts:
IMPORT rm_init_entry
IMPORT rm_prefetchabort_handler
IMPORT rm_dataabort_handler
IMPORT rm_irqhandler2
IMPORT rm_undef_handler
IMPORT User_Entry ;Entry point of user application.
CODE32
ENTRY
;Define exception table. Instruct linker to place code at address 0x0000 0000
AREA exception_table, CODE
LDR pc, Reset_Address
LDR pc, Undefined_Address
LDR pc, SWI_Address
LDR pc, Prefetch_Address
LDR pc, Abort_Address
Fig 151. Exception handlers
RM_UNDEF_HANDLER()
RM_PREFETCHABORT_HANDLER()
RM_DATAABORT_HANDLER()
RM_IRQHANDLER()
RESET
FIQ
IRQ
RESERVED
DATA ABORT
PREFETCH
ABORT
SWI
UNDEF
RealMonitor supplied exception vector handlers
sharing IRQs between RealMonitor and user IRQ handler
OR
APP_IRQDISPATCH
RM_IRQHANDLER2()
APP_IRQHANDLER2()