timeisrinit.c

ucosii移植到44b0的代码

#include "..\inc\44b.h"
#include "..\inc\44blib.h"
#include "..\inc\option.h"
#include "..\inc\def.h"
#include "..\source\includes.h"
#define IRQ_VECTOR_OFFSET	(0x18)
//初次下载程序的时候可能是由于以下的程序没有进行初始诲（有待验证)

/*void Isr_Init(void);
void HaltUndef(void);
void HaltSwi(void);
void HaltPabort(void);      
void HaltDabort(void);
    void Isr_Init(void)
 {
    U32 i;
    
    pISR_UNDEF=(unsigned)HaltUndef;
    pISR_SWI  =(unsigned)HaltSwi;
    pISR_PABORT=(unsigned)HaltPabort;
    pISR_DABORT=(unsigned)HaltDabort;
    
     for(i=_RAM_STARTADDRESS;i<(_RAM_STARTADDRESS+0x20);i+=4)
    {
	*((volatile unsigned *)i)=0xEA000000+0x1FFE;
    }

    //rINTCON=0x1;	  // Vectored Int. IRQ enable,FIQ disable    
    rINTCON=0x5;	  // Non-vectored,IRQ enable,FIQ disable    

    rINTMOD=0x0;	  // All=IRQ mode
    rINTMSK|=BIT_GLOBAL|BIT_EINT3;	  // All interrupt is masked.
}


void HaltUndef(void)
{
    Uart_Printf("Undefined instruction exception!!!\n");
    while(1);
}

void HaltSwi(void)
{
    Uart_Printf("SWI exception!!!\n");
    while(1);
}

void HaltPabort(void)
{
    Uart_Printf("Pabort exception!!!\n");
    while(1);
}

void HaltDabort(void)
{
    Uart_Printf("Dabort exception!!!\n");
    while(1);
}*/
//-------------------------------------------------------
// globle variables
//-------------------------------------------------------
volatile static int isrCount = 0;		// tick counter
//volatile static unsigned int Dump_Pool[16];

//-------------------------------------------------------
// OS_Tick Hook Fubction
//-------------------------------------------------------
void tick_hook(void)
{
	isrCount++;
	rI_ISPC = (unsigned int)1 << 20;
}

//-------------------------------------------------------
// install a new ISR
// this function must be synchronized
//-------------------------------------------------------
void ISR_Install(void)
{
	 pISR_TICK=(unsigned)OSTickISR;
}

//-------------------------------------------------------
// must be synchronized
//-------------------------------------------------------
void tick_off(void)
{
	rRTCCON = (unsigned char)1;
	
	rTICINT = (unsigned char)0;
	
	rRTCCON = (unsigned char)0;

}

//--------------------------------------------------------
// set or clear TICK interrupt mask
// this function must be synchronized
//--------------------------------------------------------
void tick_int_enable(unsigned char bEnabled)
{
	// clear interrupt pending first
	rI_ISPC = (unsigned int)0x01 << 20;
	
	rINTMSK &= (unsigned int)~(0x01 << 20);
}

//--------------------------------------------------------
// start tick function of RTC
// interval = (1 + div) / 128  second
// this function must be synchronized
// div MUST >= 1 && <= 128
//--------------------------------------------------------
void tick_init(unsigned char div)
{
	rRTCCON = (unsigned char)1;

//	ASSERT(div >= 1 && div <= 127);
	rTICINT = (unsigned char)(div | 0x80);

	rRTCCON = (unsigned char)0;

	tick_int_enable(1);
}

//--------------------------------------------------------
// interrupt controler initilization
//--------------------------------------------------------
void intcon_init(void)
{
	rINTMOD = 0;			// all interrupt sources configed as IRQ
	rI_ISPC = 0x7ffffff;	// clear all intrrupt request
	rINTCON = 0x05;			// irq interrupt available
}

//--------------------------------------------------------
// globel interrupt enable
//--------------------------------------------------------
void globle_int_enable(unsigned char bEnabled)
{
	if(bEnabled)
		rINTMSK &= ~BIT_GLOBAL;
	else
		rINTMSK |= 0x01 << 26;
}


void sys_init(void)
{      

       //Isr_Init();
	tick_off();
	tick_int_enable(0);
	globle_int_enable(0);
	intcon_init();
	isrCount = 0;
	
	// Set the function of the pins
	Port_Init();
	Uart_Select(0);
	Uart_Init(0, 115200);
       
	// hook the tick ISR
	ISR_Install();

	globle_int_enable(1);
}