Class _irq: Interrupt Request

Interrupts are HWA objects of class _irq.

Interface

---

HW_ISR( IRQ [,naked] [,interruptible] ): implement an Interrupt Service Routine. This can be used with assembly language.

• naked (optionnal): the compiler must not generate entry/exit code.
• interruptible (optionnal): the compiler enables interrupts as soon as possible.

---

HW_ISR( IRQ2, alias, IRQ1 ): make IRQ1 ISR handle IRQ2.

---

hw( enable, IRQ ) and hwa( enable, IRQ ): enable an IRQ

Example:

hw( enable, (counter2,irq) );

---

hw( disable, IRQ ) and hwa( disable, IRQ ): disable an IRQ

Example:

hw( disable, (counter1,capture0,irq) );

---

hw( is_enabled, IRQ ): verify if an IRQ is enabled.

if ( hw( is_enabled, (counter1,capture0,irq) ) ) {
  // IRQ is enabled
}

---

hw( read, IRQ ): read the IRQ flag

Example:

hw( read, (adc,irq) );

---

hw( clear, IRQ ) and hwa( clear, IRQ ): clear the IRQ flag

Example:

hw( clear, (counter2,overflow,irq) );

---

hw( enable, interrupts ): enable interrupts

Example:

hw( enable, interrupts );

---

hw( disable, interrupts ): disable interrupts

Example:

hw( disable, interrupts );