main.c

来自「arm7 s3c44b0x开发板fs44b的bios启动源代码及使用说明 下载方」· C语言 代码 · 共 152 行

#include "../inc/def.h"
#include "../inc/config.h"
#include "../inc/board.h"
#include "../inc/utils.h"

extern void DftEnvInit(void);

static void SwiHandler(void)
{
	puts("Swi Interrupt detected\n");
	while(1);
}

static void DataAbortHandler(void) 
{
	puts("Data Abort detected\n");
	while (1);
}

static void FetchAbortHandler(void)
{
	puts("Prefetch Abort detected\n");
	while (1);
}

static void UndefHandler() 
{
	puts("Halt on Undefined instruction\n");
	while (1);
}

#ifndef	INTERRUPT_SUPPORT
static void IrqHandler(void)
{
	puts("Halt on IRQ!\n");
	while(1);
}
#endif

static void FiqHandler(void)
{
	puts("Halt on FIQ!\n");
	while(1);
}

static __inline void VectorInit(void)
{
	UdfInsVector = (U32)UndefHandler;
	SwiSvcVector = (U32)SwiHandler;
	InsAbtVector = (U32)FetchAbortHandler;
	DatAbtVector = (U32)DataAbortHandler;
	
#ifndef	INTERRUPT_SUPPORT
	IrqSvcVector = (U32)IrqHandler;
#endif
	FiqSvcVector = (U32)FiqHandler;
}

void LedDisp(void)
{
	U32 i, value;
	value = 8;
	for(i = 0; i < 8; i++)
	{
		LedSet(value);
		Delay(100);
		if(i >= 3)
			value = value << 1;
		else
			value = value >> 1;
	}
	LedSet(0);
}


/****************************************************************************
【功能说明】系统主函数
****************************************************************************/
void Main(void)
{
	DisableInt();	//Disable interrupt
	
	BoardInitStart();
	
	SystemClockInit();
	TimerInit(TIMER_FREQ);
	MemCfgInit();
	PortInit();

#ifdef	TFTP_DOWNLOAD_SUPPORT
	eth_init();
	arp_init();
#endif
	
	VectorInit();
	
#ifdef	INTERRUPT_SUPPORT
	//DisableIrq(-1);		//Mask all IRQ
	//AckAndClrIrq(-1);	//ACK and Clear all IRQ
	EnableInt();		//Enable interrupt
#endif

#ifdef	NOR_FLASH_SUPPORT
	NorFlashInit();
#endif
#ifdef	NAND_FLASH_SUPPORT
	NandFlashInit();
#endif
	
#ifdef	SAVE_ENV_SUPPORT	
	if(LoadEnv())
		DftEnvInit();
#else
	DftEnvInit();
#endif

	TimerInit(TIMER_FREQ);
	
	BoardInitEnd();

	CacheDisable();
	CacheFlush();
	CacheEnable();
	
	Beep(2000, 100);
	LedDisp();		//LED来回闪烁显示	
	
	ShowBootInfo();
#ifdef	NOR_FLASH_SUPPORT
	NorFlashStatusRep();
#endif
#ifdef	NAND_FLASH_SUPPORT
	NandFlashStatusRep();
#endif
	printf("Build  date : %s--%s\n", __DATE__, __TIME__);

#ifdef	IDE_DISK_SUPPORT
	IdeHardReset();
#endif

#ifdef	CMD_SHELL_SUPPORT
	ShellIn();
#else
	while(1) 
	{
		LedDisp();
		ERROR("No Command Shell, Enter This Loop Forever...\n");
	}	
#endif	
}
//***************************************************************************