CH375的slaver的程序(C51)
CH375做slaver的程序
/***************************************
** USB 1.1 Slaver for CH375 **
** 單片機(jī)用89C2051 **
****************************************/
#include <INTRINS.H>
#include "REG2051.H"
#include "CH375INC.H"
#define DELAY_START_value 1 /* 根據(jù)單片機(jī)的時(shí)鐘選擇延時(shí)初值 */
#define MY_USB_VENDOR_ID 0x4348 /* 廠商ID */
#define MY_USB_DEVICE_ID 0x5537 /* 設(shè)備ID */
unsigned char RECV_LEN; /* 剛接收到的數(shù)據(jù)的長(zhǎng)度 */
unsigned char idata RECV_BUFFER[ CH375_MAX_DATA_LEN ]; /* 數(shù)據(jù)緩沖區(qū),用于保存接收到的下傳數(shù)據(jù),長(zhǎng)度為0到64字節(jié) */
unsigned char idata *cmd_buf;
unsigned char idata *ret_buf;
typedef union _REQUEST_PACK{
unsigned char buffer[8];
struct{
unsigned char bmReuestType; //標(biāo)準(zhǔn)請(qǐng)求字
unsigned char bRequest; //請(qǐng)求代碼
unsigned int wvalue; //特性選擇高
unsigned int wIndx; //索引
unsigned int wLength; //數(shù)據(jù)長(zhǎng)度
}r;
} mREQUEST_PACKET, *mpREQUEST_PACKET;
//設(shè)備描述符
unsigned char code DevDes[]={
0x12 //描述符大小
,0x01 //常數(shù)DEVICE
,0x10 //USB規(guī)范版本信息
,0x01
,0x00 //類別碼，
,0x00 //子類別碼
,0x37 //協(xié)議碼
,0x08 //端點(diǎn)0的最大信息包大小
,0x48 //廠商ID
,0x43
,0x37 //產(chǎn)品ID
,0x55
,0x00 //設(shè)備版本信息
,0x01
,0x00 //索引值
,0x00
,0x00
,0x01 //可能配置的數(shù)目
,0x00 //無意義
,0x00
,0x00
,0x00
,0x00
,0x00
};
//配置描述符
unsigned char code ConDes[]={ //配置描述符
0x09 //描述符大小
,0x02 //常數(shù)CONFIG
,0x27 //此配置傳回所有數(shù)據(jù)大小
,0x00 //
,0x01 //接口數(shù)
,0x01 //配置值
,0x00 //索引
,0x80 //電源設(shè)置
,0x40 //需要總線電源
//接口描述符
,0x09 //描述符大小
,0x04 //常數(shù)INTERFACE
,0x00 //識(shí)別碼
,0x00 //代替數(shù)值
,0x03 //支持的端點(diǎn)數(shù)
,0x08 //類別碼
,0x08 //子類別碼
,0x37 //協(xié)議碼
,0x00 //索引
//端點(diǎn)描述符
,0x07 //描述符大小
,0x05 //常數(shù)ENDPOINT
,0x82 //端點(diǎn)數(shù)目及方向
,0x02 //支持的傳輸類型
,0x40 //支持的最大信息包大小
,0x00
,0x00 //
,0x07
,0x05
,0x02
,0x02
,0x40
,0x00
,0x00
,0x07
,0x05
,0x81
,0x03
,0x08
,0x00
,0x01
,0x07
,0x05
,0x01
,0x02
,0x08
,0x00
,0x00
}; //配置描述符
unsigned char code LangDes[]={0x04,0x03,0x09,0x04}; //語言描述符
unsigned char code SerDes[]={0x12,0x03,'C',0,'H',0,'3',0,'7',0,'5',0,'U',0,'S',0,'B',0}; //字符串描述符
unsigned char mVarSetupRequest; // USB請(qǐng)求碼
unsigned char mVarSetupLength; // 后續(xù)數(shù)據(jù)長(zhǎng)度
unsigned char code * VarSetupDescr; // 描述符偏移地址
unsigned char VarUsbAddress ; //
bit CH375FLAGERR; //錯(cuò)誤清0
bit CH375CONFLAG; //配置標(biāo)志
mREQUEST_PACKET request;
/*
Ch375與51等的連接
CH375 51
D0 P1.0
. .
. .
. .
D7 P1.7
A0 P3.7
RD P3.5
WR P3.4
CS 接地
INT P3.2(int0)
*/
#define CH375_DATA_PORT P1 /* CH375端口的I/O地址 */
sbit CH375_CMD_DAT = P3^7; /* CH375地址線輸入A0，A0=1時(shí)寫命令，A0=0時(shí)讀寫數(shù)據(jù) */
sbit CH375_RD = P3^5; /* CH375讀選通輸入，低電平有效 */
sbit CH375_WR = P3^4; /* CH375寫選通輸入，低電平有效 */
sbit led = P3^3; /* 指示燈 */
sbit CH375_INT_WIRE = P3^2; /* CH375中斷請(qǐng)求輸出，低電平有效 */
void delay50ms(void);
void delay1s(void);
void flash_led(void);
void CH375_WR_CMD_PORT( unsigned char cmd );
void CH375_WR_DAT_PORT( unsigned char dat );
unsigned char CH375_RD_DAT_PORT(void);
void set_usb_mode( unsigned char mode );
void CH375_Init( void );
void ComInit(void);
void SendChar(unsigned char buff);
void mCh375Ep0Up(void);
void mCh375DesUp(void);
void delay50ms(void)
{
unsigned char i, j;
for( i=200; i!=0; i-- )
for( j=250; j!=0; j-- );
}
void delay1s(void)
{
unsigned char i,j,k;
for( i=10; i!=0; i-- )
for( j=200; j!=0; j-- )
for( k=250; k!=0; k-- );
}
void flash_led(void)
{
unsigned char i;
for( i=10;i>0;i-- )
{
led=!led;
delay1s();
}
}
/* 與CH372/CH375有關(guān)的基本I/O操作 */
/* 向CH375的命令端口寫入命令,周期不小于4uS,如果單片機(jī)較快則延時(shí) */
void CH375_WR_CMD_PORT( unsigned char cmd )
{
_nop_();
_nop_();
CH375_CMD_DAT = 1; /* 命令 */
CH375_DATA_PORT = cmd;
CH375_RD = 1;
CH375_WR = 0;
_nop_();
_nop_();
CH375_WR = 1;
CH375_CMD_DAT = 0;
CH375_DATA_PORT = 0xFF;
}
/* 向CH375的數(shù)據(jù)端口寫入數(shù)據(jù),周期不小于1.5uS,如果單片機(jī)較快則延時(shí) */
void CH375_WR_DAT_PORT( unsigned char dat )
{
_nop_();
CH375_CMD_DAT = 0; /* 數(shù)據(jù) */
CH375_DATA_PORT = dat;
CH375_RD = 1;
CH375_WR = 0;
_nop_();
CH375_WR = 1;
CH375_DATA_PORT = 0xFF;
}
/* 從CH375的數(shù)據(jù)端口讀出數(shù)據(jù),周期不小于1.5uS,如果單片機(jī)較快則延時(shí) */
unsigned char CH375_RD_DAT_PORT(void)
{
unsigned char rev_data;
CH375_DATA_PORT = 0xFF;
CH375_CMD_DAT = 0; /* 數(shù)據(jù) */
CH375_WR = 1;
CH375_RD = 0;
_nop_();
rev_data = CH375_DATA_PORT;
CH375_RD = 1;
return( rev_data );
}
/* 設(shè)置CH37X的工作模式 */
void set_usb_mode( unsigned char mode )
{
unsigned char i;
unsigned char RD_Data;
CH375_WR_CMD_PORT( CMD_SET_USB_MODE );
CH375_WR_DAT_PORT( mode );
for( i=100; i!=0; i-- ) /* 等待設(shè)置模式操作完成,不超過30uS */
{
RD_Data=CH375_RD_DAT_PORT();
if( RD_Data == CMD_RET_SUCCESS )
return; /* 成功 */
}
while(1)
{
flash_led(); /* CH375出錯(cuò) */
}
}
/* CH375初始化子程序 */
void CH375_Init( void )
{
unsigned char i, k;
unsigned char RD_Data;
CH375_DATA_PORT = 0xFF;
CH375_INT_WIRE = 1;
CH375_WR = 1;
CH375_RD = 1;
CH375_CMD_DAT = 0;
/* 測(cè)試CH375是否正常工作 */
for( k=100; k!=0; k-- )
{
CH375_WR_CMD_PORT( CMD_CHECK_EXIST ); /* 測(cè)試CH375是否正常工作 */
i = 0x5A;
CH375_WR_DAT_PORT( i ); /* 寫入測(cè)試數(shù)據(jù) */
i = ~i; /* 返回?cái)?shù)據(jù)應(yīng)該是測(cè)試數(shù)據(jù)取反 */
RD_Data = CH375_RD_DAT_PORT();
if ( RD_Data != i ) /* CH375不正常 */
{
for ( i=5; i!=0; i-- )
{
CH375_WR_CMD_PORT( CMD_RESET_ALL ); /* 多次重復(fù)發(fā)命令,執(zhí)行硬件復(fù)位 */
}
delay50ms(); /* 延時(shí)50ms */
}
else
break;
}
if( k==0 )
{
while(1)
{
flash_led(); /* CH375出錯(cuò) */
}
}
/*
#ifdef MY_USB_VENDOR_ID
#ifdef MY_USB_DEVICE_ID
// 設(shè)置外部自定義的USB設(shè)備VID和PID,可選操作,不執(zhí)行該命令則使用默認(rèn)的VID和PID,
// 如果設(shè)置使用自定義的ID,那么計(jì)算機(jī)端驅(qū)動(dòng)程序INF安裝文件中的"USB\VID_4348&PID_5537"需要進(jìn)行類似修改
CH375_WR_CMD_PORT( CMD_SET_USB_ID ); // 設(shè)置外部自定義的USB設(shè)備VID和PID,可選操作
CH375_WR_DAT_PORT( (unsigned char)MY_USB_VENDOR_ID ); // 寫入廠商ID的低字節(jié)
CH375_WR_DAT_PORT( (unsigned char)(MY_USB_VENDOR_ID>>8) ); // 寫入廠商ID的高字節(jié)
CH375_WR_DAT_PORT( (unsigned char)MY_USB_DEVICE_ID ); // 寫入設(shè)備ID的低字節(jié)
CH375_WR_DAT_PORT( (unsigned char)(MY_USB_DEVICE_ID>>8) ); // 寫入設(shè)備ID的高字節(jié)
#endif
#endif
*/
/* 設(shè)置USB工作模式, 必要操作 */
// set_usb_mode( 1 ); //外部固件模式
set_usb_mode( 2 ); //內(nèi)部固件模式
}
/* 串行口通訊子程序 */
/* 串行口初始化 */
void ComInit(void)
{
TMOD = 0x20; /*T1為方式2 */
TH1 = 0xFE; /*計(jì)數(shù)常數(shù)0xFE,波特率：14400 晶振:11.0592MHz */
TL1 = 0xFE;
PCON = PCON & 0x7f; /* SMOD=0 */
SCON = 0x50; /* 串行口工作在方式3 */
TR1 = 1;
}
/* 發(fā)送數(shù)據(jù) */
void SendChar(unsigned char buff)
{
SBUF = buff;
while( !TI );
TI=0;
}
//端點(diǎn)0數(shù)據(jù)上傳
void mCh375Ep0Up(void)
{
unsigned char i,len;
if( mVarSetupLength ) //長(zhǎng)度不為0傳輸具體長(zhǎng)度的數(shù)據(jù)
{
if( mVarSetupLength<=8 )
{
len=mVarSetupLength;
mVarSetupLength=0;
} //長(zhǎng)度小于8則傳輸要求的長(zhǎng)度
else
{
len=8;
mVarSetupLength-=8;
} //長(zhǎng)度大于8則傳輸8個(gè)，切總長(zhǎng)度減8
CH375_WR_CMD_PORT( CMD_WR_USB_DATA3 ); //發(fā)出寫端點(diǎn)0的命令
CH375_WR_DAT_PORT( len ); //寫入長(zhǎng)度
for( i=0;i!=len;i++ )
CH375_WR_DAT_PORT( request.buffer ); //循環(huán)寫入數(shù)據(jù)
}
else
{
CH375_WR_CMD_PORT( CMD_WR_USB_DATA3 ); //發(fā)出寫端點(diǎn)0的命令
CH375_WR_DAT_PORT( 0 ); //上傳0長(zhǎng)度數(shù)據(jù)，這是一個(gè)狀態(tài)階段
}
}
//復(fù)制描述符以便上傳
void mCh375DesUp(void)
{
unsigned char k;
for (k=0; k!=8; k++ )
{
request.buffer[k]=*VarSetupDescr; //依次復(fù)制8個(gè)描述符，
VarSetupDescr++;
}
}
/* CH375數(shù)據(jù)接收程序 */
void mCh375Interrupt(void)
{
unsigned char InterruptStatus;
unsigned char length, len;
CH375_WR_CMD_PORT(CMD_GET_STATUS); /* 獲取中斷狀態(tài)并取消中斷請(qǐng)求 */
InterruptStatus = CH375_RD_DAT_PORT(); /* 獲取中斷狀態(tài) */
RECV_LEN=0;
switch( InterruptStatus ) // 分析中斷狀態(tài)
{
case USB_INT_EP2_OUT: // 批量端點(diǎn)下傳成功
CH375_WR_CMD_PORT( CMD_RD_USB_DATA ); /* 從當(dāng)前USB中斷的端點(diǎn)緩沖區(qū)讀取數(shù)據(jù)塊,并釋放緩沖區(qū) */
length = CH375_RD_DAT_PORT(); /* 首先讀取后續(xù)數(shù)據(jù)長(zhǎng)度 */
if ( length != 0 ) /* 如果長(zhǎng)度為0則不處理 */
{
RECV_LEN = length; /* 命令包的數(shù)據(jù)長(zhǎng)度 */
ret_buf = RECV_BUFFER; /* 接收緩沖區(qū) */
while ( length -- )
{
*ret_buf = CH375_RD_DAT_PORT();
ret_buf++;
}
}
break;
case USB_INT_EP2_IN: //批量端點(diǎn)上傳成功,未處理
break;
case USB_INT_EP1_IN: //中斷端點(diǎn)上傳成功，未處理
break;
case USB_INT_EP1_OUT: //中斷端點(diǎn)下傳成功，未處理
break;
case USB_INT_EP0_SETUP: //控制端點(diǎn)建立成功
CH375_WR_CMD_PORT( CMD_RD_USB_DATA );
length=CH375_RD_DAT_PORT();
for( len=0;len!=length;len++ )
request.buffer[len] = CH375_RD_DAT_PORT(); // 取出數(shù)據(jù)
if( length==0x08 )
{
mVarSetupLength=request.buffer[6]&0x7f; //控制傳輸數(shù)據(jù)長(zhǎng)度最大設(shè)置為128
// if((c1=request.r.bmReuestType)&0x40 ) //廠商請(qǐng)求，未處理
// {}
// if((c1=request.r.bmReuestType)&0x20) //類請(qǐng)求，未處理
// {}
if( !(request.r.bmReuestType&0x60) ) //標(biāo)準(zhǔn)請(qǐng)求
{
mVarSetupRequest=request.r.bRequest; //暫存標(biāo)準(zhǔn)請(qǐng)求碼
switch( request.r.bRequest ) // 分析標(biāo)準(zhǔn)請(qǐng)求
{
case DEF_USB_CLR_FEATURE: //清除特性
if((request.r.bmReuestType&0x1F)==0x02) //不是端點(diǎn)不支持
{
switch( request.buffer[4] )
{
case 0x82:
CH375_WR_CMD_PORT( CMD_SET_ENDP7 ); //清除端點(diǎn)2上傳
CH375_WR_DAT_PORT( 0x8E ); //發(fā)命令清除端點(diǎn)
break;
case 0x02:
CH375_WR_CMD_PORT( CMD_SET_ENDP6 );
CH375_WR_DAT_PORT( 0x80 ); //清除端點(diǎn)2下傳
break;
case 0x81:
CH375_WR_CMD_PORT( CMD_SET_ENDP5 ); //清除端點(diǎn)1上傳
CH375_WR_DAT_PORT( 0x8E );
break;
case 0x01:
CH375_WR_CMD_PORT( CMD_SET_ENDP4 ); //清除端點(diǎn)1下傳
CH375_WR_DAT_PORT( 0x80 );
break;
default:
break;
}
}
else
{
CH375FLAGERR=1; //不支持的清除特性，置錯(cuò)誤標(biāo)志
}
break;
case DEF_USB_GET_STATUS: //獲得狀態(tài)
request.buffer[0]=0;
request.buffer[1]=0; //上傳狀態(tài)
break;
case DEF_USB_SET_ADDRESS: //設(shè)置地址
VarUsbAddress=request.buffer[2]; //暫存USB主機(jī)發(fā)來的地址
break;
case DEF_USB_GET_DESCR: //獲得描述符
if( request.buffer[3]==1 ) //設(shè)備描述符上傳
VarSetupDescr=DevDes;
else
if( request.buffer[3]==2 ) //配置描述符上傳
VarSetupDescr=ConDes;
else
if( request.buffer[3]==3 )
{
if( request.buffer[2]== 0 )
VarSetupDescr=LangDes;
else
VarSetupDescr=SerDes; //做字符串處理
}
mCh375DesUp(); //其余描述符不支持
break;
case DEF_USB_GET_CONFIG: //獲得配置
request.buffer[0]=0; //沒有配置則傳0
if( CH375CONFLAG )
request.buffer[0]=1; //已經(jīng)配置則傳1；這是在描述符里規(guī)定的
break;
case DEF_USB_SET_CONFIG: //設(shè)置配置
CH375CONFLAG=0;
if( request.buffer[2] != 0 )
{
CH375CONFLAG=1; //設(shè)置配置標(biāo)志
}
break;
case DEF_USB_GET_INTERF: //得到接口
request.buffer[0]=1; //上傳接口數(shù)，本事例只支持一個(gè)接口
break;
default :
CH375FLAGERR=1; //不支持的標(biāo)準(zhǔn)請(qǐng)求
break;
}
}
}
else //不支持的控制傳輸，不是8字節(jié)的控制傳輸
{
CH375FLAGERR=1;
}
if( !CH375FLAGERR )
mCh375Ep0Up(); //沒有錯(cuò)誤/調(diào)用數(shù)據(jù)上傳，長(zhǎng)度為0上傳為狀態(tài)
else
{
CH375_WR_CMD_PORT( CMD_SET_ENDP3 ); //設(shè)置端點(diǎn)1為STALL，指示一個(gè)錯(cuò)誤
CH375_WR_DAT_PORT( 0x0F );
flash_led();
}
break;
case USB_INT_EP0_IN: //控制端點(diǎn)上串成功
if( mVarSetupRequest==DEF_USB_GET_DESCR ) //描述符上傳
{
mCh375DesUp();
mCh375Ep0Up();
}
else
if( mVarSetupRequest==DEF_USB_SET_ADDRESS ) //設(shè)置地址
{
CH375_WR_CMD_PORT( CMD_SET_USB_ADDR );
CH375_WR_DAT_PORT( VarUsbAddress ); //設(shè)置USB地址,設(shè)置下次事務(wù)的USB地址
}
break;
case USB_INT_EP0_OUT: //控制端點(diǎn)下傳成功
CH375_WR_CMD_PORT( CMD_RD_USB_DATA ); //發(fā)出讀數(shù)據(jù)命令
length=CH375_RD_DAT_PORT();
if( length>0 ) //長(zhǎng)度為0跳出
{
for( len=0;len!=length;len++ )
CH375_RD_DAT_PORT(); //取出下傳數(shù)據(jù)
}
break;
default:
if( InterruptStatus&0x03 ) //總線復(fù)位
{
CH375FLAGERR=0; //錯(cuò)誤清0
CH375CONFLAG=0; //配置清0
mVarSetupLength=0;
}
else
{ //命令不支持
flash_led();
}
break;
}
CH375_WR_CMD_PORT( CMD_UNLOCK_USB ); //釋放緩沖區(qū)
led=0;
}
/*串行數(shù)據(jù)接收程序*/
void receive(void)
{
unsigned int count;
unsigned char buf;
RECV_LEN=0;
cmd_buf = RECV_BUFFER; /* 接收緩沖區(qū) */
while( 1 )
{
RI=0;
*cmd_buf = SBUF;
cmd_buf++;
RECV_LEN++;
if( RECV_LEN == 64 )
{
while( 1 )
{
count=10000;
while( RI==0 )
{
count--;
if( count==0 )
return;
}
RI=0;
buf=SBUF;
}
}
count=10000;
while( RI==0 )
{
count--;
if( count==0 )
return;
}
}
}
void main(void)
{
unsigned char length;
delay1s(); /* 延時(shí)等待CH375初始化完成,如果單片機(jī)由CH375提供復(fù)位信號(hào)則不必延時(shí) */
CH375_Init( ); /* 初始化CH375 */
ComInit();
led = 0;
while ( 1 )
{
if( RI==1 ) /* 從串口接收到的數(shù)據(jù) */
{
led=1;
receive();
led=0;
/* 將從串口接收到的數(shù)據(jù)發(fā)送到USB設(shè)備 */
ret_buf = RECV_BUFFER; /* 接收緩沖區(qū) */
length = RECV_LEN; /* 剛接收到的數(shù)據(jù)長(zhǎng)度 */
if( length!=0 )
{
CH375_WR_CMD_PORT( CMD_WR_USB_DATA7 ); /* 向USB端點(diǎn)2的發(fā)送緩沖區(qū)寫入數(shù)據(jù)塊 */
CH375_WR_DAT_PORT( length ); /* 首先寫入后續(xù)數(shù)據(jù)長(zhǎng)度 */
while( length-- )
{
CH375_WR_DAT_PORT( *ret_buf ); /* 數(shù)據(jù) */
ret_buf++;
}
}
}
CH375_INT_WIRE=1;
if( CH375_INT_WIRE==0 ) /* 從USB設(shè)備接收到數(shù)據(jù) */
{
mCh375Interrupt();
/* 將從USB設(shè)備接收到的數(shù)據(jù)發(fā)送到串口 */
ret_buf = RECV_BUFFER; /* 接收緩沖區(qū) */
length = RECV_LEN; /* 剛接收到的數(shù)據(jù)長(zhǎng)度 */
while( length-- )
{
SendChar( *ret_buf );
ret_buf++;
}
}
}
}
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66821730(技術(shù)支持)
