system.c

该软件为在sunplus的６１单片机上实现的mp3播放器．里面有完整的源代码．

#include "system.h"
#include "..\\spce061\\061reg.h"
#include "..\\public\\public.h"
#include "..\\Usb\\tpbulk.h"
extern BIT_STATUS bFlags;
extern unsigned int  BOTFSMstate;

void PowerOnInit()
{
	Watchdog_Clear();	 
	INT_OFF();					//Disable All Interrupt
	
   	Set_SystemClock(C_Fosc_49M | C_Fosc);//Set System Clock
	Set_LVD_Ctrl(C_LVD28V);
	USB_IoInit();
//	IDLE_IoInit();
}

void IDLE_IoInit()
{
//*** IO port Default Status ***
	Set_IOA_Dir(0x0000);		
	Set_IOA_Attrib(0xffff);
	Set_IOA_Data(0x0001);		//Set PortA (Dir,Attrib,Data)
	Set_IOA_Buffer(0x0001);
	
	Set_IOB_Dir(0x0000);
	Set_IOB_Attrib(0xffff);
	Set_IOB_Data(0x0000);		//Set PortB (Dir,Attrib,Data)
	Set_IOB_Buffer(0x0000);		
}

void USB_IoInit()
{
//*** IO port Default Status ***
	Set_IOA_Dir(0x00f2);		
	Set_IOA_Attrib(0xffff);
	Set_IOA_Data(0xffc1);		//Set PortA (Dir,Attrib,Data)
	Set_IOA_Buffer(0xffc1);
	
	Set_IOB_Dir(0xeef3);
	Set_IOB_Attrib(0xfeff);
	Set_IOB_Data(0x69b0);		//Set PortB (Dir,Attrib,Data)
	Set_IOB_Buffer(0x69b0);

//*** IO port Default Status ***
	Set_IOA_Dir(0xfff2);		
	Set_IOA_Attrib(0xfffb);
	Set_IOA_Data(0xffce);		//Set PortA (Dir,Attrib,Data)
	Set_IOA_Buffer(0xffce);
	
	Set_IOB_Dir(0xfef3);
	Set_IOB_Attrib(0xfef3);
	Set_IOB_Data(0x7fbe);		//Set PortB (Dir,Attrib,Data)
	Set_IOB_Buffer(0x7fbe);	
}

void USB_Reset()
{
	*P_IOB_Buffer=*P_IOB_Buffer & 0xffdf;	//D12 CE = 0
	*P_IOB_Buffer=*P_IOB_Buffer & 0xbfff;	//D12 RESET = 0
	DelayMS(100);							//Delay 100 MS
	*P_IOB_Buffer=*P_IOB_Buffer | 0x4000;	//D12 RESET = 0
	DelayMS(100);							//Delay 100 MS		
}

void USB_Init()
{
	USB_IoInit();
	USB_Reset();	
}

void MP3_IoInit()
{
//*** IO port Default Status ***
	Set_IOA_Dir(0x00f0);		
	Set_IOA_Attrib(0xffff);
	Set_IOA_Data(0xffca);		//Set PortA (Dir,Attrib,Data)
	Set_IOA_Buffer(0xffca);
	
	Set_IOB_Dir(0xeef3);
	Set_IOB_Attrib(0xfeff);
	Set_IOB_Data(0x69b0);		//Set PortB (Dir,Attrib,Data)
	Set_IOB_Buffer(0x69b0);
}

void MP3_Reset()
{
	*P_IOB_Buffer=*P_IOB_Buffer & 0xf7ff;	//MP3 CE = 0
	*P_IOB_Buffer=*P_IOB_Buffer & 0xdfff;	//MP3 RESET = 0
	DelayMS(100);							//Delay 100 MS
	*P_IOB_Buffer=*P_IOB_Buffer | 0x2000;	//MP3 RESET = 0
	DelayMS(100);							//Delay 100 MS		
}

void PowerOff()
{
	*P_IOB_Buffer=*P_IOB_Buffer & 0xff7f;	//PWR EN1 = 0
}