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 as an interrupt handler in the dynamic vector table. More...
void	IntUnregister (uint32_t ui32Interrupt)
	Unregisters an interrupt handler in the dynamic vector table. 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 or system exception. More...
void	IntDisable (uint32_t ui32Interrupt)
	Disables an interrupt or system exception. More...
void	IntPendSet (uint32_t ui32Interrupt)
	Pends an interrupt. More...
bool	IntPendGet (uint32_t ui32Interrupt)
	Checks if 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)
	Global pointer to the (dynamic) interrupt vector table when placed in SRAM. More...

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)

Global pointer to the (dynamic) interrupt vector table when placed in SRAM.

Interrupt vector table is placed at "vtable_ram" defined in the linker file provided by Texas Instruments. By default, this is at the beginning of SRAM.

Note

See interrupt.c for compiler specific implementation!

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().