init.c

不包含识别算法

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 *
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 /*
 * File:	init.c
 *
 * Purpose:	initialisation routines, such as CPU, Timer0 delay
 *		function and interrupt service routines.
 *
 * Notes:
 *
 * Modifications:
 *
 */

#define _INIT_H

#include <mcf5249.h>
#include <init.h>
#include <displays.h>

/********************************************************************/

/*--- 5us delay routine using Timer0 ---*/
void delay (uint32 delay)
{
	uint32 tester = 0;

	MCF5249_SIM_ICR1 = 0x84;		// set Timer0 to Interrupt level 1 and priority 0
	MCF5249_SIM_IMR  = 0xFFFFFDFF;		// enable timer0 interrupts

/*--- Setup timer for a 5us count ---*/
	MCF5249_TIMER0_TMR = 0x001D;		// master clock /16, prescale 1, interrupt on TRR, enable timer
	MCF5249_TIMER0_TRR = 0x0016;		// timer reference value (22 = 0x16)

	delayTick = 0;

	while(delayTick<delay)
		tester = (delay - delayTick);

	MCF5249_TIMER0_TMR = 0;			//reset timer
}

/*--- CPU module initialisation ---*/
void CPUInit(void)
{
	/*--- QSPI registers ---*/
	MCF5249_PLL_PLLCR |= 0x00000800;	//Sets the pin function to QSPI_CLK
	MCF5249_SIM_GPIO_FUNC &= ~0x25000000;	//Sets the pin function to QSPI_Dout, QSPI_CS0 and QSPI_CS1

	/*--- Setup the MCF5249 port pins for the LCD interface ---*/
	MCF5249_SIM_GPIO1_FUNC |= 0x00000020;	//Sets the pin function to output used for the LCD reset
	MCF5249_SIM_GPIO1_OUT &= ~0x00000020;	//Holds the LCD module in reset
	MCF5249_SIM_GPIO1_ENABLE |= 0x00000020;	//Enables the output
	MCF5249_QSPI_QMR = 0xC302;		// MSTR, DOHIE, DIVIDE BY 2

	/*--- Chip select registers ---*/
	MCF5249_CS_CSAR3 = 0x5000;		//Base address of memory mapped to CS3
	MCF5249_CS_CSMR3 = 0x00000001;		//Mask for CS3 address decode plus valid bit
	MCF5249_CS_CSCR3 = 0x00000941;		//2 wait states, internal TA, 8-bit port and valid bit
	MCF5249_IDE_CONFIG1 = 0x00040000;	//BUFENB1 active on CS3 (SRE/SWE cycles)
	MCF5249_IDE_CONFIG2 = 0x00010000;	//TA generation on CS3

	/*--- Sensor Bus Signals -WR -RD -CS0 setup ---*/
	MCF5249_SIM_GPIO_FUNC &= ~0x00000800;		//Sets the pin function to -SRE
	MCF5249_SIM_GPIO_FUNC &= ~0x00001000;		//Sets the pin function to -SWE
	MCF5249_SIM_GPIO1_FUNC &= ~0x02000000;		//Sets the pin function to -BUFENB1

	/*--- Enrollment/Verification switch setup ---*/
	MCF5249_SIM_GPIO1_FUNC |= 0x00100000;		//Sets the pin function to GPIO52
	MCF5249_SIM_GPIO1_ENABLE &= ~0x00100000;	//Sets the GPIO to input
}

//#pragma interrupt Timer0
/**********************************************************
 * Timer0 ISR                                             *
 **********************************************************/
void Timer0(void)
{
	MCF5249_TIMER0_TER = 0xFF; // reset timer interrupt event

	delayTick++;
}