flashcmd.c

来自「TI 最新的1.2G DSP TMS320C6455的bootloader的烧写」· C语言 代码 · 共 65 行

#define FlashMap1BaseAddr 0xb0000000
void WriteIsOver(void);
//-----------------------------------------------------

void EraseChip(void)
{
	*(volatile unsigned char*)(FlashMap1BaseAddr + 0xaaa) = 0xaa;
	*(volatile unsigned char*)(FlashMap1BaseAddr + 0x555) = 0x55;
	*(volatile unsigned char*)(FlashMap1BaseAddr + 0xaaa) = 0x80;
	*(volatile unsigned char*)(FlashMap1BaseAddr + 0xaaa) = 0xaa;
	*(volatile unsigned char*)(FlashMap1BaseAddr + 0x555) = 0x55;
	*(volatile unsigned char*)(FlashMap1BaseAddr ) = 0x10;
	
	WriteIsOver();
}





void WriteByte(unsigned int Addr, char Val)
{

	*(volatile unsigned char*)(FlashMap1BaseAddr ) = 0xaa;
	*(volatile unsigned char*)(FlashMap1BaseAddr ) = 0x55;
	*(volatile unsigned char*)(FlashMap1BaseAddr ) = 0xa0;
	*(volatile unsigned char*)(FlashMap1BaseAddr + Addr) = Val;
	WriteIsOver();
}
unsigned char ReadByte(unsigned int Addr)
{
 unsigned char Val=0; 
 Val=*(volatile unsigned char*)(FlashMap1BaseAddr + Addr);
 return Val;
}

void WriteIsOver(void)
{
	unsigned int i;
	unsigned char LastToggleBit,CurrentToggleBit;
	LastToggleBit = (*(volatile unsigned char*)FlashMap1BaseAddr) & 0x40;
	CurrentToggleBit = (*(volatile unsigned char*)FlashMap1BaseAddr) & 0x40;
	for(i = 0; ; i++)
	{
		LastToggleBit = CurrentToggleBit;
		CurrentToggleBit = (*(volatile unsigned char*)FlashMap1BaseAddr) & 0x40;
		if(LastToggleBit == CurrentToggleBit) break;
	}
}

void pllbypass()
{
    *((volatile unsigned int *)0x29a0110)=0x00000003;//160M
    *((volatile unsigned int *)0x29a0114)=0x00008000;
    *((volatile unsigned int *)0x29a0160)=0x00008007;//eclk=10M
    *((volatile unsigned int *)0x29a0164)=0x00008007;
    *((volatile unsigned int *)0x29a0100)=0x00000041;
    *((volatile unsigned int *)0x29a0138)=0x00000001;  

	*((volatile unsigned int *)0x70000080)=0x0ffffffe;
    *((volatile unsigned int *)0x70000084)=0x0ffffffc;
}