initialisation.c

I2C的源程序

#include "Core A.h"

//--------------------------------------------------------------------------//
// Function:	Init_Interrupts												//
//																			//
// Parameters:	None														//
//																			//
// Return:		None														//
//																			//
// Description:	This function initialises all interrupts.					//
//--------------------------------------------------------------------------//
void Init_Interrupts(void)
{
	// assign core IDs to interrupts
	*pSICA_IAR0 = 0xfff1ffff;
	*pSICA_IAR1 = 0xffffffff;
	*pSICA_IAR2 = 0xffffffff;
	*pSICA_IAR3 = 0xffffffff;
	*pSICA_IAR4 = 0xffff3fff;				// Timers -> ID3
	*pSICA_IAR5 = 0xffffffff;
	*pSICA_IAR6 = 0xffffffff;
	*pSICA_IAR7 = 0xffffffff;

	// assign ISRs to interrupt vectors
	register_handler(ik_ivg10, Timers_ISR);	// Timers ISR -> IVG10

	// enable interrupts
	*pSICA_IMASK0 = 0x00001000;
	*pSICA_IMASK1 = 0x00000008;
}

//--------------------------------------------------------------------------//
// Function:	I2C_SM_Clock_Init											//
//--------------------------------------------------------------------------//
void I2C_SM_Clock_Init(void)
{
	// configure Timer0
	*pTIMER0_PERIOD	= I2C_CLOCK_PERIOD;
	*pTIMER0_WIDTH	= I2C_CLOCK_WIDTH;
	*pTIMER0_CONFIG	= OUT_DIS | IRQ_ENA | PERIOD_CNT | PWM_OUT;
}

//--------------------------------------------------------------------------//
// Function:	I2C_SM_Clock_Enable											//
//																			//
// Parameters:	None														//
//																			//
// Return:		None														//
//																			//
// Description: This function is used to enable the timer that provides the	//
//				the clock for the I2C state machine.						//
//--------------------------------------------------------------------------//
void I2C_SM_Clock_Enable(void)
{
	*pTMRS8_ENABLE = I2C_CLOCK_TIMER;
}

//--------------------------------------------------------------------------//
// Function:	I2C_SM_Clock_Disable										//
//																			//
// Parameters:	None														//
//																			//
// Return:		None														//
//																			//
// Description: This function is used to disable the timer that provides	//
//				the clock for the I2C state machine.						//
//--------------------------------------------------------------------------//
void I2C_SM_Clock_Disable(void)
{
	*pTMRS8_DISABLE = I2C_CLOCK_TIMER;
}