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nvic.c
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nvic.c
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// NVIC Library
// Jason Losh
//-----------------------------------------------------------------------------
// Hardware Target
//-----------------------------------------------------------------------------
// Target Platform: EK-TM4C123GXL
// Target uC: TM4C123GH6PM
// System Clock: -
// Hardware configuration: -
//-----------------------------------------------------------------------------
// Device includes, defines, and assembler directives
//-----------------------------------------------------------------------------
#include "nvic.h"
#include "tm4c123gh6pm.h"
//-----------------------------------------------------------------------------
// Global variables
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// Subroutines
//-----------------------------------------------------------------------------
void enableNvicInterrupt(uint8_t vectorNumber)
{
volatile uint32_t* p = (uint32_t*) &NVIC_EN0_R;
vectorNumber -= 16;
p += vectorNumber >> 5;
*p = 1 << (vectorNumber & 31);
}
void disableNvicInterrupt(uint8_t vectorNumber)
{
volatile uint32_t* p = (uint32_t*) &NVIC_DIS0_R;
vectorNumber -= 16;
p += vectorNumber >> 5;
*p = 1 << (vectorNumber & 31);
}
void setNvicInterruptPriority(uint8_t vectorNumber, uint8_t priority)
{
volatile uint32_t* p = (uint32_t*) &NVIC_PRI0_R;
vectorNumber -= 16;
uint32_t shift = 5 + (vectorNumber & 3) * 8;
p += vectorNumber >> 2;
*p &= ~(7 << shift);
*p |= priority << shift;
}