2103_rtc_interrupt.txt

最新版IAR FOR ARM（EWARM）5.11中的代码例子

Specifications:
1. Create a 1Hz interrupt using RTC second interrupt
2. Configure RTC as IRQ interrupt
3. Toggel LED 4 at 0.5Hz rate
4. Ensure that PLL is disengaged by clearing PLLE and PLLC and giving PLL feed
   sequence
5. Use .ddf file iolpc2103MM.ddf
   This is because displaying the register VICVectAddr in C-SPY debugger's
   register window can affect the state machine og the VIC, and under certain
   circumstances disable interrupts. If the content of VICVectAddr must be
   known, copy it into a register at read time for later display.
6. Locate instruction ldr pc,[pc,#-0xFF0] at 0x18 so that control will jump directly
   to isr for interrupt in question
7. Make a 350Hz, 30% duty cycle square wave using PWMCON from Timer0. Route this
   to pin P0.5
8. Trap instruction prefetch abort, undefined instruction abortand data fetch
   abort exceptions in handlers that execute infinite loops.

Author: Mark Moran
Last Date Changed: 14 Jan 06 - tested with new headers from IAR for LPC2101,2,3
Status:
- Works running out of RAM with JLINK.
- Works running out of flash with JLINK.
- Works running out of flash without JLINK.

Copyright: IAR Systems Software Inc. 2005
Disclaimer: This code is furnished "as is" solely for the purpose of
illustrating how to use the IAR Embedded Workbench integrated development
environment to create code for NXP LPC2xxx ARM7 microcontrollers, and to
illustrate the use of peripherals of that part. Every effort has been made to
ensure that this example works according to the above specifications. Code in
this example may be used freely for any purpose with the understanding that
IAR Systems Software assumes no further responsibility for accuracy or
reliability once it has been partly or fully copied into another application.
By using any portion of this code in other applications,the user takes full
responsibility for code at that time.