📄 51
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/* MCS-51单片机C语言的示例程序, U盘数据写 */
#include <reg51.h>
#include <string.h>
#include <stdio.h>
/* 定义CH375命令代码及返回状态 */
#include "CH375INC.H"
/* CH375特性 */
#define CH375_BLOCK_SIZE 64 /* CH375 maximum data block size */
#define CH375_BLK_PER_SEC 8 /* CH375 block per sector, SECTOR_SIZE/CH375_BLOCK_SIZE */
unsigned char volatile xdata CH375_CMD_PORT _at_ 0xFFF1; /* CH375命令端口的I/O地址 */
unsigned char volatile xdata CH375_DAT_PORT _at_ 0xFEF0; /* CH375数据端口的I/O地址 */
unsigned char xdata DATA_BUFFER _at_ 0x0000; /* 外部RAM数据缓冲区的起始地址,长度不少于一次读写的数据长度 */
unsigned char seg[]={0xfc,0x60,0xda,0xf2,0x66,0xb6,0xbe,0xe0,0xfe,0xf6,0xee,0x3e,0x9c,0x7a,0x9e,0x8e};
sbit LED_OUT = 0x90^4; /* P1.4 低电平驱动LED显示,用于监控演示程序的进度 */
//sbit XUANU = 0x90^3; //CH375选通
//sbit XUANRAM = 0x90^5; //62256片选控制
void display(unsigned char x)
{ SBUF=x;
while(TI==0);
TI=0;
}
/* 延时2微秒,不精确 */
void mDelay2uS( )
{
unsigned char i;
for ( i = 1; i != 0; i -- );
}
/* 延时100毫秒,不精确 */
void mDelay100mS( )
{
unsigned char i, j, c;
for ( i = 100; i != 0; i -- ) for ( j = 100; j != 0; j -- ) c += 3;
}
/* 等待CH375中断并获取状态 */
sbit CH375_INT_WIRE = 0xB0^2; /* P3.2, INT0, 连接CH375的INT#引脚,用于查询中断状态 */
unsigned char mWaitInterrupt( )
{
unsigned char c;
while ( CH375_INT_WIRE ); /* 如果CH375的中断引脚输出高电平则等待 */
CH375_CMD_PORT = CMD_GET_STATUS; /* 获取当前中断状态 */
mDelay2uS( ); /* 延时2uS */
c = CH375_DAT_PORT; /* 返回中断状态 */
/* if ( c == USB_INT_DISCONNECT ) ?; /* 检测到USB设备断开事件 */
/* else if ( c == USB_INT_CONNECT ) ?; /* 检测到USB设备连接事件 */
return( c );
}
/* 设置CH375为USB主机方式 */
unsigned char mCH375Init( )
{
unsigned char c, i;
#ifdef TEST_CH375_PORT
CH375_CMD_PORT = CMD_CHECK_EXIST; /* 测试工作状态 */
mDelay2uS( ); /* 至少延时2uS */
CH375_DAT_PORT = 0x55; /* 测试数据 */
mDelay2uS( ); /* 至少延时2uS */
c = CH375_DAT_PORT; /* 返回数据应该是测试数据取反 */
if ( c != 0xaa ) { /* CH375出错 */
for ( i = 100; i != 0; i -- )
{ /* 强制数据同步 */
CH375_CMD_PORT = CMD_RESET_ALL; /* CH375执行硬件复位 */
c = CH375_DAT_PORT; /* 延时 */
}
mDelay100mS( ); /* 延时至少30mS */
}
#endif
CH375_CMD_PORT = CMD_SET_USB_MODE; /* 设置USB工作模式 */
mDelay2uS( ); /* 至少延时2uS */
CH375_DAT_PORT = 6; /* 模式代码,自动检测USB设备连接 */
for ( i = 0xff; i != 0; i -- ) { /* 等待操作成功,通常需要等待10uS-20uS */
c = CH375_DAT_PORT;
if ( c == CMD_RET_SUCCESS ) break; /* 操作成功 */
}
if ( i != 0 ) return( 0 ); /* 操作成功 */
else return( 0xff ); /* CH375出错,例如芯片型号错或者处于串口方式或者不支持 */
}
/* 初始化磁盘 */
unsigned char mInitDisk( )
{
unsigned char mIntStatus;
CH375_CMD_PORT = CMD_DISK_INIT; /* 初始化USB存储器 */
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_SUCCESS ) return( 0 ); /* U盘已经成功初始化 */
else return( mIntStatus ); /* 出现错误 */
}
void ram622()
{
unsigned char *mBuffer;
unsigned int dd;
mBuffer=&DATA_BUFFER;
for(dd=0;dd<=255;dd++)
{ *mBuffer=dd;
mBuffer++;
}
}
/* 将缓冲区中的多个扇区的数据块写入U盘 */
unsigned char mWriteSector( unsigned long iLbaStart, unsigned char iSectorCount )
/* iLbaStart 是写入的线起始性扇区号, iSectorCount 是写入的扇区数 */
{
unsigned char mIntStatus;
unsigned char *mBufferPoint;
unsigned int mBlockCount;
unsigned char mLength;
CH375_CMD_PORT = CMD_DISK_WRITE; /* 向USB存储器写数据块 */
mDelay2uS( ); /* 延时2uS */
CH375_DAT_PORT = (unsigned char)iLbaStart; /* LBA的最低8位 */
CH375_DAT_PORT = (unsigned char)( iLbaStart >> 8 );
CH375_DAT_PORT = (unsigned char)( iLbaStart >> 16 );
CH375_DAT_PORT = (unsigned char)( iLbaStart >> 24 ); /* LBA的最高8位 */
CH375_DAT_PORT = iSectorCount; /* 扇区数 */
mBufferPoint = &DATA_BUFFER; /* 指向缓冲区起始地址 */
for ( mBlockCount = iSectorCount * CH375_BLK_PER_SEC; mBlockCount != 0; mBlockCount -- ) { /* 数据块计数 */
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_DISK_WRITE ) { /* USB存储器写数据块,请求数据写入 */
CH375_CMD_PORT = CMD_WR_USB_DATA7; /* 向CH375缓冲区写入数据块 */
mDelay2uS( ); /* 延时2uS */
mLength = CH375_MAX_DATA_LEN;
CH375_DAT_PORT = mLength; /* 后续数据的长度 */
while ( mLength ) { /* 根据长度写入数据 */
CH375_DAT_PORT = *mBufferPoint; /* 将数据写入 */
mBufferPoint ++;
mLength --;
}
CH375_CMD_PORT = CMD_DISK_WR_GO; /* 继续执行USB存储器的写操作 */
}
else break; /* 返回错误状态 */
}
if ( mBlockCount == 0 ) mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_SUCCESS ) return( 0 ); /* 操作成功 */
else return( mIntStatus ); /* 操作失败 */
}
struct _HD_MBR_DPT {
unsigned char PartState;
unsigned char StartHead;
unsigned int StartSec;
unsigned char PartType;
unsigned char EndHead;
unsigned int EndSec;
unsigned long StartSector;
unsigned long TotalSector;
};
const struct _HD_MBR_DPT NewPart[2] = { { 0x00, 0x00, 0x0002, 0x04, 0x03, 0xffff, 0x0000001, 0x00008000 },
{ 0x00, 0xff, 0xffff, 0x01, 0x03, 0xffff, 0x00008002, 0x00003000 } };
/* 为printf和getkey输入输出初始化串口 */
/*void mInitSTDIO( )
{
SCON = 0x50;
PCON = 0x80;
TMOD = 0x20;
TH1 = 0xf3; /* 24MHz晶振, 9600bps
TR1 = 1;
TI = 1;
}*/
main( ) {
unsigned char c,mIntStatus;
unsigned int i;
SCON=0x00;
LED_OUT = 0; /* 开机后LED亮一下以示工作 */
for(i=1;i<=40000;i++);
LED_OUT = 0;
c = mCH375Init( ); /* 初始化CH375 */
if ( c )
//{/*printf( "Error @CH375Init\n" );*/
{ display(0xfc);
display(0xfc);
display(0xfc);
display(0xfc);
LED_OUT=1;
while(1); } /*初始化操作矢败，显示0000*/
/* printf( "InitDisk\n" );*/
display(0x60);
display(0x60);
display(0x60);
display(0x60);
LED_OUT=0;
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);/*初始化CH375成功，显示1111*/
do { /* 等待U盘连接 */
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
} while ( mIntStatus != USB_INT_CONNECT ); /* U盘没有连接或者已经拔出 */
mDelay100mS( ); /* 延时等待U盘进入正常工作状态 */
mDelay100mS( );
c=mInitDisk( ); /* 初始化U盘,实际是识别U盘的类型,不影响U盘中的数据,在所有读写操作之前必须进行此步骤*/
if ( c )
{
display(c);
display(c);
display(c);
display(c); //如果初始化U盘错误，显示错误的返回码，以便查错
while(1);
}
mDelay100mS();
LED_OUT = 1; //初始U盘成功，关灯
display(0xda);
display(0xda);
display(0xda);
display(0xda);
// while(1){};
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);//初始化U盘成功，显示2222
ram622();//将数据存储器填0-255
c = mWriteSector( 1, 1 );
if ( c ) {
display(0xf2);
display(0xf2);
display(0xf2);
display(0xf2); //写不成功，显示3333
while(1);
}
// memcpy( &DATA_BUFFER+446, NewPart, sizeof( NewPart ) ); /* 代替原来的分区信息 */
// c = mWriteSector( 4, 1 );
// if ( c )
//{
// display(0x66);
// display(0x66);
// display(0x66);
// display(0x66); //写不成功，显示4444
// while(1);
// }
display(0xb6);
display(0xb6);
display(0xb6);
display(0xb6); //写成功，显示5555
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
for(i=1;i<=50000;i++);
// mReadSector(1,1);
// for(i=1;i<=50000;i++);
// for(i=1;i<=50000;i++);
// for(i=1;i<=50000;i++);
// for(i=1;i<=50000;i++);
while ( 1 ) {
mIntStatus = mWaitInterrupt( ); /* 等待中断并获取状态 */
if ( mIntStatus == USB_INT_DISCONNECT ) { /* U盘没有连接或者已经拔出 */
/* printf( "Out\n" );*/
display(0xbe);
display(0xbe);
display(0xbe);
display(0xbe);
LED_OUT = 1;
while(1);
for(i=1;i<=30000;i++);
}
/*U盘已拔出，显示6666*/
else if ( mIntStatus == USB_INT_CONNECT ) { /* U盘已经连接 */
/* printf( "In\n" );*/
display(0xe0);
display(0xe0);
display(0xe0);
display(0xe0);}
for(i=1;i<=30000;i++);
/*U盘还在，显示7777*/
LED_OUT = 0;
while(1);
}
}
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