f. In general, to configure and operate the interrupt mechanism for any peripheral, what are the steps need to be done? [3 Marks]

Question

For the interrupt to work, three things to be done:
- Its IE(Interrupt Enable) bit to be set.
- Its IF(Interrupt Flag) status bit to be reset.
- Its Priority to be set.

What should be done for ISR?

Answer 1

For the ISR (Interrupt Service Routine) to be configured and executed, the following steps need to be done:

1. Define the ISR: Write the code for handling the interrupt in the ISR function. This function will be executed whenever the associated interrupt occurs.

2. Map the ISR to the correct interrupt: Register the ISR function to the specific interrupt vector or register provided by the peripheral or microcontroller. This ensures that the correct ISR is called when the interrupt is triggered.

3. Enable the interrupt: Enable the interrupt by setting the corresponding interrupt enable bit in the interrupt control register or the peripheral's control register. This allows the microcontroller or peripheral to react to the interrupt by calling the registered ISR.

It is important to note that these steps may vary depending on the specific microcontroller or peripheral being used. The documentation or datasheet of the device should provide details on how to configure and operate the interrupt mechanism.