Peripheral Simulation

For Atmel AT91SAM9M10 — Advanced Interrupt Controller

Simulation support for this peripheral or feature is comprised of:

• Dialog boxes which display and allow you to change peripheral configuration.

These simulation capabilities are described below.

Advanced Interrupt Controller Dialog

The Advanced Interrupt Controller Dialog (available from the Peripherals menu) displays the status of all simulated ARM interrupts. The interrupt source, name, index, vector and type, and pending, mask and priority level status are displayed.

Selected Interrupt

To configure an interrupt, select the desired interrupt from the list and then use the controls in this section to change the vector address (AIC_SVR2), Type and Priority level for that interrupt. Use the Pending checkbox to trigger an interrupt, and the Mask checkbox to enable an interrupt.

• AIC_IVR is the Interrupt Vector Register which contains the address of the current interrupt being processed.
• AIC_FVR contains the address of the routine to be executed when a Fast Interrupt occurs.
• AIC_ISR is the Interrupt Status Register which returns the source number(index) of the current interrupt .
• AIC_SPU is the Spurious Vector Register which contains the address of the Spurious Interrupt handler. Use this text box to specify the vector address of your Spurious Interrupt routine.
• AIC_IPR is the Interrupt Pending Register and displays the interrupts which are currently triggered, but not yet serviced.
• AIC_IMR is the Interrupt Mask Register and displays the interrupts that are currently enabled (masked).
• NIRQ is the state of the standard interrupt request input to the ARM processor. Internal (on-chip) and external interrrupts can enable this input. Fast interrupts cannot.
• FIRQ is the state of the fast interrupt request input to the ARM processor. Only fast interrupts can enable this input. Internal and external interrupts cannot.

External Interrupt Pins

• FIQ Fast Interrupt Request input pin.
• IRQ0 External Interrupt Request 0 input pin.
• IRQ1 External Interrupt Request 1 input pin.
• IRQ2 External Interrupt Request 2 input pin.