Astrobe Forum

Posted: **Thu Aug 13, 2015 7:28 am**

Hello There,

How to define ISR in oberon. I want to define ISR for external interrupt. as i am using starter edition, I can not check the definition of MCU and LPC import is not available.
Please reply.

Thanks
Anita

Posted: **Thu Aug 13, 2015 10:31 pm**

There aren't any pre-defined GPIO interrupt-related definitions in the Astrobe library modules. All the information you need is in the NXP LPC176x-5x UserManual (UM10360) e.g. Section 9.5.6 GPIO interrupt registers. You can download a copy of this from the NXP User Manual links on the Astrobe Development Boards page:

http://www.astrobe.com/boards.htm

You can give the relevant register addresses meaningful names by defining them as hexadecimal constants in CONST sections when you develop your own Oberon modules e.g.

Code: Select all

CONST
  NVICBase* = 0E000E000H;
  NVICISER0* = NVICBase + 0100H;
  NVICISER1* = NVICBase + 0104H;
  NVICICER0* = NVICBase + 0180H;
  NVICICER1* = NVICBase + 0184H;
  VTOR*      = NVICBase + 0D08H;

Examples of how to define, install and use Oberon interrupt handlers are included with the Astrobe Starter Edition e.g. IRQTimer.mod and IRQBlinker.mod.

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