main.c

at91rm9200 time control源码

//*----------------------------------------------------------------------------
//*         ATMEL Microcontroller Software Support  -  ROUSSET  -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name           : main.c
//* Object              : main application written in C
//* Creation            : ODi   11/18/2002
//*
//*----------------------------------------------------------------------------
#include "lib_arm920t.h"
#include "AT91RM9200.h"
#include "lib_AT91RM9200.h"
#include "def.h"
#include "console.h"

//* Interrupt Handlers
extern void AT91F_ST_ASM_HANDLER(void);

//* system timer counter
unsigned int StTick = 0;

//*----------------------------------------------------------------------------
//* \fn    AT91F_GetTickCount
//* \brief This function returns the value of the system timer
//* This function is for demonstration purpose only
//*----------------------------------------------------------------------------
unsigned int AT91F_GetTickCount(void)
{
	return(StTick);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_ST_HANDLER
//* \brief This function is invoked by main
//* This function is for demonstration purpose only
//*----------------------------------------------------------------------------
void AT91F_ST_HANDLER(void)
{
	volatile int StStatus;
	puts("test st interrupt\n ");
	printf("%x\n",StTick );

	// Read the system timer status register
	StStatus = *(AT91C_ST_SR);
	StTick++;
//	if(!(StTick&0xff))
//		putch('I');
}

void __irq irq_handler(void)
{	
	void (*svr)(void);
	AT91PS_AIC ptr = AT91C_BASE_AIC;
	U32 i;
	U8 irq_idx;

//取得中断入口地址可用AIC_IVR或用AIC_ISR作索引得到AIC_SVR数组中的地址
	i = ptr->AIC_IVR;		//read AIC_IVR
	irq_idx = ptr->AIC_ISR&0x1f;
//边沿触发中断必须以此清中断
	AT91F_AIC_ClearIt(AT91C_BASE_AIC, irq_idx);	

// Write in the IVR to support Protect Mode
// No effect in Normal Mode
// De-assert the NIRQ and clear the source in Protect Mode	
	ptr->AIC_IVR = (AT91_REG)ptr;
	
	puts("I  kim\n ");
	printf("%x,%x,%x\n", irq_idx, ptr->AIC_IPR, ptr->AIC_CISR);

	svr = (void (*)(void))i;//ptr->AIC_SVR[irq_idx];
	(*svr)();
	AT91F_AIC_AcknowledgeIt(ptr);	//退出中断前必须应答
}
static void InitPio(void)
{
	//led	
	AT91F_PIO_CfgOutput(AT91C_BASE_PIOB, AT91C_PIO_PB25|AT91C_PIO_PB26);
	AT91F_PIO_ClearOutput(AT91C_BASE_PIOB, AT91C_PIO_PB25|AT91C_PIO_PB26);
	//key
//	AT91F_PIO_CfgInput(AT91C_BASE_PIOB, AT91C_PIO_PB6|AT91C_PIO_PB7|AT91C_PIO_PB8|AT91C_PIO_PB9);
	//buzzer
	AT91F_PIO_CfgOutput(AT91C_BASE_PIOB, AT91C_PIO_PB22);
	AT91F_PIO_SetOutput(AT91C_BASE_PIOB, AT91C_PIO_PB22);	
	delay(20);		
	AT91F_PIO_ClearOutput(AT91C_BASE_PIOB, AT91C_PIO_PB22);


}
//*----------------------------------------------------------------------------
//* \fn    main
//* \brief 
//* 
//*----------------------------------------------------------------------------
int main()
{
	puts("\n\n-I- ======================================\n");
	puts("-I- AT91RM9200 Timer-counter example\n");
	puts("-I- --------------------------------------\n");
	InitPio();
	//* System Timer initialization
	//AT91F_ST_SetPeriodInterval(AT91C_BASE_ST, AT91C_ST_PITS);
	AT91F_ST_SetPeriodInterval(AT91C_BASE_ST, 1500);
	AT91F_ST_EnableIt(AT91C_BASE_ST, AT91C_ST_PITS);
	AT91F_AIC_ConfigureIt (
							AT91C_BASE_AIC,                        // AIC base address
							AT91C_ID_SYS,                          // System peripheral ID
							AT91C_AIC_PRIOR_HIGHEST,               // Max priority
							AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE,   // Level sensitive
							AT91F_ST_ASM_HANDLER );						
	//* Enable ST interrupt
	AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_SYS);
	delay(100);
	
	AT91F_RTC_InterruptDisable(AT91C_BASE_RTC, 0x1f);
//	AT91F_ST_DisableIt(AT91C_BASE_ST, 0xf);
	*AT91C_PMC_IDR = 0xf0f;
	
	while(1);
	
}