nwait.c

基于44B0的Bootload原代码,详细的设计了 44B0开发平台的BOOT

#include <string.h>
#include "..\inc\def.h"
#include "..\inc\44b.h"
#include "..\inc\44blib.h"
#include "..\inc\idle.h"

void WaitRd8(void);
void WaitWr8(void);
void WaitRd32(void);
void WaitWr32(void);
void WaitRd16(void);
void WaitWr16(void);

#define BUS8		(0)
#define BUS16		(1)
#define BUS32		(2)
#define ENWAIT		(1)
#define SRAMBE03	(1)

#define B2_Tacs		(0x0)	//0clk
#define B2_Tcos		(0x0)	//0clk
#define B2_Tacc		(0x2)	//3clk
#define B2_Tcoh		(0x0)	//0clk
#define B2_Tah		(0x0)	//0clk
#define B2_Tacp		(0x0)	//2clk
#define B2_PMC		(0x0)	//no page mode


// Work-around with nWAIT.

void Test_WaitPin(void)
{
    rPCONF=rPCONF&(~(3<<4))|(2<<4);	//nWAIT pin is selected.		
    rPUPF=0x0;

    rPCONE=rPCONE&(~(3))|(3);		//PE0=CLKOUT

    //WaitRd32();
    //WaitWr32();
    //WaitRd16();
    //WaitWr16();
    WaitRd8();
    //WaitWr8();	
}




void WaitRd8(void)
{
    U8 readVal;
    int i;

    Uart_Printf("nGCS2,8-bit,read,nWAIT Test.\n");
    Uart_Printf("nWAIT/PF2 pin is configured as nWAIT pin.\n");

    rNCACHBE0=( (0x6000000>>12)<<16 )|(0x4000000>>12);
    rBWSCON=rBWSCON & ~(0xf<<8)|(BUS8<<8)|(ENWAIT<<10); //nGCS2 
    rBANKCON2=((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC));

    for(i=0;i<2;i++); //wait until the bank configuration is in effect.
    
    readVal=(*(volatile U8 *)0x4000000); 
    Uart_Printf("read_data=%x\n",readVal);
}


void WaitWr8(void)
{
    U8 writeVal=0xaa;
    int i;

    Uart_Printf("nGCS2,8-bit,write,nWAIT Test.\n");
    Uart_Printf("nWAIT/PF2 pin is configured as nWAIT pin.\n");

    rBWSCON=rBWSCON & ~(0xf<<8)|(BUS8<<8)|(ENWAIT<<10);	//nGCS2
    rBANKCON2=((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC));
    rNCACHBE0=( (0x6000000>>12)<<16 )|(0x4000000>>12);

    for(i=0;i<2;i++); //wait until the bank configuration is in effect.

    *((volatile U8 *)0x4000000)=writeVal; 
}




void WaitRd16(void)
{
    U16 readVal;
    int i;

    Uart_Printf("nGCS2,16-bit,read,nWAIT Test.\n");
    Uart_Printf("nWAIT/PF2 pin is configured as nWAIT pin.\n");

    rBWSCON=rBWSCON & ~(0xf<<8)|(BUS16<<8)|(ENWAIT<<10);  //nGCS2
    rBANKCON2=((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC));
    rNCACHBE0=( (0x6000000>>12)<<16 )|(0x4000000>>12);

    for(i=0;i<2;i++); //wait until the bank configuration is in effect.

    readVal=(*(volatile U16 *)0x4000000); 
    Uart_Printf("read_data=%x\n",readVal);
}


void WaitWr16(void)
{
    U32 writeVal=0xaaaa;
    int i;

    Uart_Printf("nGCS2,16-bit,write,nWAIT Test.\n");
    Uart_Printf("nWAIT/PF2 pin is configured as nWAIT pin.\n");

    rBWSCON=rBWSCON & ~(0xf<<8)|(BUS16<<8)|(ENWAIT<<10);  //nGCS2
    rBANKCON2=((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC));
    rNCACHBE0=( (0x6000000>>12)<<16 )|(0x4000000>>12);

    for(i=0;i<2;i++); //wait until the bank configuration is in effect.

    *((volatile U16 *)0x4000000)=writeVal; 
}




void WaitRd32(void)
{
    U32 readVal;
    int i;

    Uart_Printf("nGCS2,32-bit,read,nWAIT Test.\n");
    Uart_Printf("nWAIT/PF2 pin is configured as nWAIT pin.\n");

    rBWSCON=rBWSCON & ~(0xf<<8)|(BUS32<<8)|(ENWAIT<<10); //nGCS2
    rBANKCON2=((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC));
    rNCACHBE0=( (0x6000000>>12)<<16 )|(0x4000000>>12);

    for(i=0;i<2;i++); //wait until the bank configuration is in effect.

    readVal=(*(volatile U32 *)0x4000000); 
    Uart_Printf("read_data=%x\n",readVal);
}


void WaitWr32(void)
{
    U32 writeVal=0xaaaa;
    int i;
    
    Uart_Printf("nGCS2,32-bit,write,nWAIT Test.\n");
    Uart_Printf("nWAIT/PF2 pin is configured as nWAIT pin.\n");

    rBWSCON=rBWSCON & ~(0xf<<8)|(BUS32<<8)|(ENWAIT<<10); //nGCS2
    rBANKCON2=((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC));
    rNCACHBE0=( (0x6000000>>12)<<16 )|(0x4000000>>12);

    for(i=0;i<2;i++); //wait until the bank configuration is in effect.

    *((volatile U32 *)0x4000000)=writeVal; 
}