delay.c

#include <stdint.h>
#include <stdbool.h>

#include "inc/tm4c123gh6pm.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/pin_map.h"

#include "driverlib/gpio.h"
#include "driverlib/sysctl.h"
#include "driverlib/timer.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"


volatile uint32_t usec = 0;

//Interrupt handler for the timer

/*
void SysTickInt(void)
{
  MAP_TimerIntClear( TIMER1_BASE, TIMER_TIMA_TIMEOUT );
  usec++;
}

void Timer1_Init(void)
{
	uint32_t period = (MAP_SysCtlClockGet()/1000000)-1 ;		// 1 us
	// Enable timer pin from system
	MAP_SysCtlPeripheralEnable( SYSCTL_PERIPH_TIMER1 );
	// Timer mode set to periodic timer 16 bit timer
	MAP_TimerDisable( TIMER1_BASE, TIMER_A );
  MAP_TimerConfigure( TIMER1_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PERIODIC_UP );
	// Load the period of systick
	MAP_TimerLoadSet( TIMER1_BASE, TIMER_A, period);
	// Clear interrupt flag
	MAP_TimerClockSourceSet( TIMER1_BASE, TIMER_CLOCK_SYSTEM );
	
	TimerIntRegister( TIMER1_BASE, TIMER_A, SysTickInt);
	MAP_TimerIntClear( TIMER1_BASE, TIMER_TIMA_TIMEOUT);
	MAP_TimerIntEnable(TIMER1_BASE, TIMER_TIMA_TIMEOUT);
	
	// Enable timer
	MAP_TimerEnable( TIMER1_BASE, TIMER_A);	
}

void delay_us(uint32_t utime)
{
	volatile uint32_t temp1 = usec;
	while((usec-temp1) < utime);
}

void delay_ms(uint32_t mtime)
{
	mtime *= 1000;
	volatile uint32_t temp2 = usec;
	while((usec-temp2) < mtime);
}

*/



void Timer1_Init(void)
{
	  uint32_t period = (MAP_SysCtlClockGet()/1000000)-1 ;		// 1 us
		MAP_SysCtlPeripheralEnable( SYSCTL_PERIPH_TIMER1 );
		MAP_TimerDisable( TIMER1_BASE, TIMER_B );
		MAP_TimerConfigure( TIMER1_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PERIODIC );
		MAP_TimerLoadSet( TIMER1_BASE, TIMER_A, period );
		MAP_TimerClockSourceSet( TIMER1_BASE, TIMER_CLOCK_SYSTEM );
		MAP_TimerEnable( TIMER1_BASE, TIMER_A);
}

void delay_us(uint32_t time)
{
    int i;
    for(i=0;i<time;i++){ 
       while((MAP_TimerIntStatus( TIMER1_BASE, false) & TIMER_TIMA_TIMEOUT)==0){};
        MAP_TimerIntClear( TIMER1_BASE, TIMER_TIMA_TIMEOUT );
    }
}

void delay_ms(uint32_t time)
{
		time *=1000;
    int i;
    for(i=0;i<time;i++){ 
       while((MAP_TimerIntStatus( TIMER1_BASE, false) & TIMER_TIMA_TIMEOUT)==0){};
        MAP_TimerIntClear( TIMER1_BASE, TIMER_TIMA_TIMEOUT );
    }
}

///////////////////////////////////////////////////////////////////////////////////
/*
void Timer1_Init(void)
{

	  SYSCTL->RCGCTIMER |=(1U<<1); 
    TIMER1->CTL=0;
    TIMER1->CFG=0x04;
    TIMER1->TAMR=0x02;
    TIMER1->TAILR= (MAP_SysCtlClockGet()/1000000)-1;
    TIMER1->ICR =0x1;
    TIMER1->CTL |=0x01;
	

}

void delay_us(uint32_t time)
{
    int i;
    for(i=0;i<time;i++){ 
       while((TIMER1->RIS & 0x1)==0);
        TIMER1->ICR = 0x1;
    }
}

void delay_ms(uint32_t time)
{
		time *=1000;
    int i;
    for(i=0;i<time;i++){ 
       while((TIMER1->RIS & 0x1)==0);
        TIMER1->ICR = 0x1;
    }
}
*/