/*************************************************************************
**
**					宋海村
**				  song_haicun@163.com 
**
 **************************************************************************/
#include <intrinsics.h>
#include <stdio.h>
#include <iolpc2103.h>

//系统设置，Fosc，Fcclk，Fcco，Fpclk的定义；

#define FOSC            11059200UL		// OSC [Hz]

#define FCCLK           FOSC*4			// Core clk [Hz]

#define FCCO		(FCCLK*4)		// Per clk [Hz]

#define FPCLK           (FCCLK/4)*1		// Timer tick per second		


#define TICK_PER_SEC    (4UL)
#define TIM_PER_S(Val)  (PCCLK/Val)

#define MAX_TICK_PER    TIM_PER_S(20)
#define MIN_TICK_PER    TIM_PER_S(5)

// Timer Delta period [ms]
#define DELTA_PER       (50UL)
#define TIM_DPER        ((PCCLK*DELTA_PER)/1000UL)

#define LED_MASK        1<<18
/*************************************************************************
 * 函数名称：irq_handler
 * 入口参数：无
 *
 * 返回参数：无
 *
 * 描    述：IRQ handler
 *
 *************************************************************************/
#pragma vector=IRQV
__irq __arm void irq_handler (void)
{
void (*interrupt_function)();
  unsigned int vector;

  vector = VICVectAddr;     //获得中断向量
  interrupt_function = (void(*)())vector;
  if(interrupt_function != NULL)
  {
    interrupt_function();  //调用中断指向的函数
  }
  else
  {
    VICVectAddr = 0;      //清除在VIC中的中断
  }
}
/*************************************************************************
 * 函数名称: Timer0Handler
 * 入口参数: 无
 *
 * 返回参数: 无
 *
 * 说    明: Timer 0 handler
 *
 *************************************************************************/
void Timer0Handler (void)
{
  
  T0IR_bit.MR0INT = 1;			// clear interrupt flag
  
  if ((IOSET & LED_MASK) == 0)		// Change patern
    IOSET = LED_MASK;		        //关闭LED
  else
    IOCLR = LED_MASK;
  
  VICVectAddr = 0;			//pNextPattern = pNextPattern->pNextPattern;        //调整当前的链表
}
/*************************************************************************
 * 函数名称: VicInit
 * 入口参数: 无
 *
 * 返回参数: 无
 *
 * 说    明: Init VIC module
 *
 *************************************************************************/
void VicInit (void)
{
  
  VICIntSelect  =  0;			// Assign all interrupt chanels to IRQ
  
  VICIntEnClear = 0xFFFFFFFF;		// Diasable all interrupts
  
  VICSoftIntClear = 0xFFFFFFFF;		// Clear all software interrutps
  
  VICProtection = 0;			// VIC registers can be accessed in User or privileged mode
  
  VICVectAddr = 0;			// Clear interrupt
  
  VICDefVectAddr = 0;			// Clear address of the Interrupt Service routine (ISR) for non-vectored IRQs.

  // Clear address of the Interrupt Service routine (ISR) for vectored IRQs.

  VICVectAddr0  = VICVectAddr1  = VICVectAddr2  = VICVectAddr3  =\
  VICVectAddr4  = VICVectAddr5  = VICVectAddr6  = VICVectAddr7  =\
  VICVectAddr8  = VICVectAddr9  = VICVectAddr10 = VICVectAddr11 =\
  VICVectAddr12 = VICVectAddr13 = VICVectAddr14 = VICVectAddr15 = 0;

  // Disable all vectored IRQ slots

  VICVectCntl0  = VICVectCntl1  = VICVectCntl2  = VICVectCntl3  =\
  VICVectCntl4  = VICVectCntl5  = VICVectCntl6  = VICVectCntl7  =\
  VICVectCntl8  = VICVectCntl9  = VICVectCntl10 = VICVectCntl11 =\
  VICVectCntl12 = VICVectCntl13 = VICVectCntl14 = VICVectCntl15 = 0;
}
/*************************************************************************
 * 函数名称: Init_timer0
 * 入口参数: 无
 *
 * 返回参数: 无
 *
 * 说    明: Init tiner0
 *
 *************************************************************************/
void Init_timer0(void)
{
  // Init timer
  
  T0TCR = 2;				// Reset and stop timer0
  
  T0CTCR = 0;				// Set timer counters mode - clock by PCLK
  
  T0PR  = 0;				// Set timer prescaler
  
  T0MR0 = PCCLK/TICK_PER_SEC;		// Set timer period
  
  T0MCR = 3;				// Set mack action - interrupt by MACH0 enable, reset counter
  
  T0EMR = 0;				// No external action
  
  
 
  VICIntSelect_bit.TIMER0 = 0;		 // Assign to IRQ

  // Set interrupt slots

  VICVectAddr0 = (unsigned int) Timer0Handler;

  VICVectCntl0_bit.NUMBER = VIC_TIMER0;

  VICVectCntl0_bit.ENABLED = 1;
  
  VICIntEnable_bit.TIMER0 = 1;		// Timer 0 interrupt enable
  
  T0TCR = 1;				// Enable timer0
}
/*************************************************************************
 * 函数名称: Init_Gpio
 * 入口参数: 无
 *
 * 返回参数: 无
 *
 * 说    明: Init GPIO
 *
 *************************************************************************/
void Init_Gpio(void)
{
   PINSEL0 = PINSEL1 = 0;		// Init GPIO
  
  SCS_bit.GPIO0M = 0;			// Disable fast IO
  
  
  IODIR = LED_MASK;			// Set pins connect to LEDs as outputs
  
  IOCLR = LED_MASK;			// All LEDs off
}
/*************************************************************************
 * 函数名称: Init_pll
 * 入口参数: 无
 *
 * 返回参数: 无
 *
 * 说    明: Init PLL
 *
 *************************************************************************/
void Init_pll(void)
{
  PLLCON = 0;				// Disable PLL
  
  PLLFEED = 0xAA;			// Write Feed
  PLLFEED = 0x55;
  
  APBDIV_bit.APBDIV  = 0;		// Set periphery divider /4
  
  MAMCR_bit.MODECTRL = 0;		// Set MAM fully enable
  MAMTIM_bit.CYCLES  = 3;
  MAMCR_bit.MODECTRL = 2;
}
/*************************************************************************
 * 函数名称: main
 * 入口参数: 无
 *
 * 返回参数: 无
 *
 * 描    述: main
 *
 *************************************************************************/
void main(void)
{
  Init_pll();

  // Memory map init flash memory is maped on 0 address

#ifdef FLASH

  MEMMAP_bit.MAP = 1;

#else

  MEMMAP_bit.MAP = 2;

#endif 

  __disable_interrupt();

  VicInit();

  Init_Gpio();

  Init_timer0();

  __enable_interrupt();

  while(1)
  {};
}