firminit.c

来自「基于GE00 实验系统开发板的实验指导用途」· C语言 代码 · 共 106 行

/**************************************************************************
*                                                                         *
*   PROJECT     : ARM port for UCOS-II                                    *
*                                                                         *
*   MODULE      : FRMWRK.c                                                *
*                                                                         *
*   AUTHOR      : Michael Anburaj                                         *
*                 URL  : http://geocities.com/michaelanburaj/             *
*                 EMAIL: [e-mail]                       *
*                                                                         *
*   PROCESSOR   : S3c2410x (32 bit ARM920T RISC core from Samsung)        *
*                                                                         *
*   IDE         : SDT 2.51 & ADS 1.2                                      *
*                                                                         *
*   DESCRIPTION :                                                         *
*   This is the Framework module. Creates an operating infrastructure.    *
*                                                                         *
**************************************************************************/


#include "includes.h"

#include <stdarg.h>
#include <stdio.h>

/* declaration for local function */
void init_PMU(void);
void init_timer(void);

/* ********************************************************************* */
/* Global definitions */
void FirmInit(void)
{
#ifndef	ARMulator	
	init_PMU();
	
	mask_all_irq();
	enable_all_irq();
#endif	
	//init_timer();
}
/* ********************************************************************* */
/* Global definitions */

void init_PMU(void)
{
	U32 sysclk;
	U32 i,n,m;
	
	sysclk =70000000;	//config sysclk
	  
    //****************************open all module
        
	*(RP)(PMU_PSCR) =0x17fff;	//open all module
	
	*(RP)(PMU_PMDR)	=0X01;
	*(RP)PMU_PLTR=0x00d200cd;	//MLTV=210,ULTV=205
	
	for(i=0;i<100;i++);
		
	n = 2;
	m = 8*sysclk/10000000;
	*(RP)(PMU_PMCR) = (n << 8) | m;
	*(RP)(PMU_PMCR) = (1 << 12) | (n << 8) | m;
		
	*(RP)PMU_PUCR=0x1530;		//parameter PD=5,D=48

}

void init_timer( void )
{
#ifdef ARMulator
	*(RP)GPT1_LCR = 0x7A1;				//10ms under 50MHz
	
	*(RP)GPT1_CR = 0xC8;				//enable period work under 256 divied frequency

#else

#ifdef GIII
     *(RP)GPT1_CNTL = 0X007;     //0-select gpt
                                                                //;0-disable software reset
                                                                //;0-restar mode
                                                                //;11-cancel catch the rising edge and falling edge and send a int signal function
                                                                //;0-comparament irq disable
                                                        		//;01-sysclk/16 to prescaler
                                                                //;1-gpt disable

	*(RP)GPT1_SCAL = 0X07;      //set prescaler regment

	*(RP)GPT1_COMP = 0X186a0;               ////set count value,10ms ,70MHZ
	
	*(RP)GPT1_CNTL = 0X17;     //interrupt enable
#else //GIV
	*(RP)GPT1_LCR = 0xAAE60;				//10ms under 70MHz
	
	*(RP)GPT1_CR = 0x03;					//normal work and interrupt enable
#endif

#endif
	unmask_irq(INT_GPT);

	return;
}

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