Interrupt Services

Functions
void	int_connect (irq_t irq, void(*isr)(void *), void *arg)
void	int_enable (irq_t irq)
void	int_disable (irq_t irq)
void	int_lock (void)
void	int_unlock (void)

Detailed Description

Function Documentation

int_connect()

void int_connect	(	irq_t	irq,
		void(*)(void *)	isr,
		void *	arg
	)

Connects the function isr as the Interrupt Service Routine for the interrupt specified by irq. The ISR will be called with the parameter arg when the interrupt is raised.

The arg parameter is normally used to let one ISR service several devices of the same type.

void uartISR (void * arg)
{
   volatile uart_t * pUART = (uart_t *)arg;
 
   // Handle UART interrupt
   if (pUART->irq_status == ...)
   {
      ...
   }
}
 
void myInit (void)
{
   int_connect (IRQ_UART0, uartISR, pUART0);
   int_connect (IRQ_UART1, uartISR, pUART1);
 
   int_enable (IRQ_UART0);
   int_enable (IRQ_UART1);
}

Parameters

irq	Interrupt to be serviced
isr	Interrupt service routine
arg	Sent as argument to ISR

int_disable()

void int_disable

(

irq_t

irq

)

Disables the interrupt specified by irq.

Parameters

irq	Interrupt to disable

int_enable()

void int_enable

(

irq_t

irq

)

Enables the interrupt specified by irq.

Parameters

irq	Interrupt to enable

int_lock()

void int_lock

(

void

)

Globally disables all maskable interrupts.

int_unlock()

void int_unlock

(

void

)

Globally enables all maskable interrupts.