system.c

USART的驱动程序

/*************************************************************************************
*	Copyright (c) 2005 by National ASIC System Engineering Research Center.
*	PROPRIETARY RIGHTS of ASIC are involved in the subject matter of this 
*	material.  All manufacturing, reproduction, use, and sales rights 
*	pertaining to this subject matter are governed by the license agreement.
*	The recipient of this software implicitly accepts the terms of the license.
*
*	File Name: system.c
*
*	Function Description:
*		void	pmc_init(void)
*								The function initialize PMC unit and open all modules
*							for chip debug.
*
*		void	system_init(void)			
*								It calls two function to accomplish PMC unit initialization
*							and interrupt controller initialization.
*
*	Created by Michael <[e-mail]>, 2005-03-23
**************************************************************************************/

#include "garfield.h"

void pmc_init(U32 sysclk, U32 module)
{
	U32 i;
	U32	n,m;

	*(RP)(PMU_PCSR) |= module;	//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

	return ;
}

void system_init(void)
{
	/* PLL initialized */
	pmc_init(70000000, 0xffff);

	/* Interrupt initialize */
	INT_INIT();

	return ;
}

/* end of system.c */