Lists all installed interrupts. Use the checkbox to enable or disable the interrupt.

A unique interrupt identifier.

Shows the type of the interrupt. The type can be one of:

Forced, a single-occasion interrupt defined in the Available Interrupts window.

Single, a single-occasion interrupt.

Repeat, a periodically occurring interrupt.

If the interrupt has been set from a C-SPY macro, the additional part (macro) is added, for example: Repeat(macro).

A description of the selected interrupt, if available. The description is retrieved from the selected device description file and consists of a string describing the priority, vector offset, enable bit, and pending bit, separated by space characters. The enable bit and pending bit are optional. It is possible to have none, only the enable bit, or both. For interrupts specified using the system macro __orderInterrupt, the Description box is empty.

For Cortex-M devices, the description is retrieved from the selected device description file and is editable. Enable bit and pending bit are not available from the ddf file—they must be manually edited if wanted. The priority is as in the hardware—the lower the number, the higher the priority. NMI and HardFault are special, and their descriptions should not be edited. Cortex-M interrupts are also affected by the PRIMASK, FAULTMASK, and BASEPRI registers, as described in the Arm documentation.

For other devices, the description strings for IRQ and FIQ are hardcoded and cannot be edited. In those descriptions, a higher priority number means a higher priority.

The value of the cycle counter after which the specified interrupt will be generated. Click to edit.

The periodicity of the interrupt in cycles. Click to edit.

How long, in cycles, the interrupt remains pending until removed if it has not been processed. Click to edit. If you specify inf, the corresponding pending bit will be set until the interrupt is acknowledged or removed.

A timing variation range, as a percentage of the repeat interval, in which the interrupt might occur for a period. For example, if the repeat interval is 100 and the variance 5%, the interrupt might occur anywhere between T=95 and T=105, to simulate a variation in the timing. Click to edit.

The probability, in percent, that the interrupt will actually occur within the specified period. Click to edit.

Enables or disables the entire interrupt simulation system. If the interrupt simulation is disabled, the definitions remain but no interrupts are generated. Note that you can also enable and disable installed interrupts individually by using the check box to the left of the interrupt name in the list of installed interrupts.

Enables or disables the individual interrupt you clicked on.

Removes the individual interrupt you clicked on.

Selects an interrupt to install. The drop-down list contains all available interrupts. Your selection will automatically update the Description box. The list is, for Cortex-M devices, populated with entries from the device description file that you have selected. For other devices, only two interrupts are available: IRQ and FIQ.

Removes all installed interrupts in the window.

Opens the Available Interrupts window, see Available Interrupts window.