OM11077 NXP Semiconductors, OM11077 Datasheet - Page 751
OM11077
Manufacturer Part Number
OM11077
Description
MODULE DIMM LPC2478 ARM7
Manufacturer
NXP Semiconductors
Specifications of OM11077
Accessory Type
Module Card
For Use With/related Products
ARM-57TS-LPC2478
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
568-4742
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4. How to enable RealMonitor
UM10237_4
User manual
4.1 Adding stacks
4.2 IRQ mode
4.3 Undef mode
4.4 SVC mode
When one of these exceptions occur that is not handled by user application, the following
happens:
The following steps must be performed to enable RealMonitor. A code example which
implements all the steps can be found at the end of this section.
User must ensure that stacks are set up within application for each of the processor
modes used by RealMonitor. For each mode, RealMonitor requires a fixed number of
words of stack space. User must therefore allow sufficient stack space for both
RealMonitor and application.
RealMonitor has the following stack requirements:
Table 682. RealMonitor stack requirement
A stack for this mode is always required. RealMonitor uses two words on entry to its
interrupt handler. These are freed before nested interrupts are enabled.
A stack for this mode is always required. RealMonitor uses 12 words while processing an
undefined instruction exception.
RealMonitor makes no use of this stack.
Processor mode
Undef
Prefetch Abort
Data Abort
IRQ
•
•
– Undef exception caused by the undefined instructions in user foreground
RealMonitor enters a loop, polling the DCC. If the DCC read buffer is full, control is
passed to rm_ReceiveData() (RealMonitor internal function). If the DCC write buffer is
free, control is passed to rm_TransmitData() (RealMonitor internal function). If there is
nothing else to do, the function returns to the caller. The ordering of the above
comparisons gives reads from the DCC a higher priority than writes to the
communications link.
RealMonitor stops the foreground application. Both IRQs and FIQs continue to be
serviced if they were enabled by the application at the time the foreground application
was stopped.
application. This indicates an error in the application being debugged. RealMonitor
stops the user application until a "Go" packet is received from the host.
Rev. 04 — 26 August 2009
RealMonitor Stack Usage (Bytes)
48
16
16
8
Chapter 35: LPC24XX RealMonitor
UM10237
© NXP B.V. 2009. All rights reserved.
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