interrupt.c File Reference

#include "interrupt.h"

Functions
static void	IntDefaultHandler (void)
	The default interrupt handler. More...
void	IntRegister (uint32_t ui32Interrupt, void(*pfnHandler)(void))
	Registers a function to be called when an interrupt occurs. More...
void	IntUnregister (uint32_t ui32Interrupt)
	Unregisters the function to be called when an interrupt occurs. More...
void	IntPriorityGroupingSet (uint32_t ui32Bits)
	Sets the priority grouping of the interrupt controller. More...
uint32_t	IntPriorityGroupingGet (void)
	Gets the priority grouping of the interrupt controller. More...
void	IntPrioritySet (uint32_t ui32Interrupt, uint8_t ui8Priority)
	Sets the priority of an interrupt. More...
int32_t	IntPriorityGet (uint32_t ui32Interrupt)
	Gets the priority of an interrupt. More...
void	IntEnable (uint32_t ui32Interrupt)
	Enables an interrupt. More...
void	IntDisable (uint32_t ui32Interrupt)
	Disables an interrupt. More...
void	IntPendSet (uint32_t ui32Interrupt)
	Pends an interrupt. More...
bool	IntPendGet (uint32_t ui32Interrupt)
	Query whether an interrupt is pending. More...
void	IntPendClear (uint32_t ui32Interrupt)
	Unpends an interrupt. More...

Variables
static const uint32_t	g_pui32Priority []
static const uint32_t	g_pui32Regs []
void(*	g_pfnRAMVectors [NUM_INTERRUPTS])(void)

Function Documentation

static void IntDefaultHandler ( void  )

static

The default interrupt handler.

This is the default interrupt handler for all interrupts. It simply loops forever so that the system state is preserved for observation by a debugger. Since interrupts should be disabled before unregistering the corresponding handler, this should never be called.

Returns

None

Referenced by IntUnregister().

{
    // Go into an infinite loop.
    while(1)
    {
    }
}

Variable Documentation

void(* g_pfnRAMVectors[NUM_INTERRUPTS])(void)

Referenced by IntRegister(), and IntUnregister().

const uint32_t g_pui32Priority[]

static

Initial value:

=
{
    NVIC_APINT_PRIGROUP_0_8, NVIC_APINT_PRIGROUP_1_7, NVIC_APINT_PRIGROUP_2_6,
    NVIC_APINT_PRIGROUP_3_5, NVIC_APINT_PRIGROUP_4_4, NVIC_APINT_PRIGROUP_5_3,
    NVIC_APINT_PRIGROUP_6_2, NVIC_APINT_PRIGROUP_7_1
}

This is a mapping between priority grouping encodings and the number of preemption priority bits.

Referenced by IntPriorityGroupingGet(), and IntPriorityGroupingSet().

const uint32_t g_pui32Regs[]

static

Initial value:

=
{
    0, NVIC_SYS_PRI1, NVIC_SYS_PRI2, NVIC_SYS_PRI3, NVIC_PRI0, NVIC_PRI1,
    NVIC_PRI2, NVIC_PRI3, NVIC_PRI4, NVIC_PRI5, NVIC_PRI6, NVIC_PRI7,
    NVIC_PRI8, NVIC_PRI9, NVIC_PRI10, NVIC_PRI11, NVIC_PRI12, NVIC_PRI13
}

This is a mapping between interrupt number and the register that contains the priority encoding for that interrupt.

Referenced by IntPriorityGet(), and IntPrioritySet().