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Ehernet Protocol


SilentLee
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Hi,

We want to use RTX as host system. According to Ethernet Protocal, we write programs to communicate with clipper through sockets. If we send no-line commands, clipper would do Corresponding action such as "#2j+". But if we send single-line commands, the charcters responsed is null such as "I122". WHY? The programs are as follows:

 

main:

void main()

{

char Cmd_Clear = 18;

char Cmd1[10] = "I122=55";

char Cmd2[10] = "I122";

char *I122str = NULL;

 

 

Cmd[7] = 13; //Add at the end of sending command,

Cmd[4] = 13; //whether add or not ,the result is the same

 

InitPmacEthernet(); //Build connection

 

PmacSockPortSend(Cmd_Clear);

PmacSockSendLine("#2j+"); //Motor2 forward

 

PmacSockGetResponse(Cmd2,I122str);

printf("The original value of I122 is %s\n",I122str);

 

PmacSockGetResponse(Cmd2,I122str);

printf("Now, The value of I122 is %s\n",I122str);

 

Sleep(10000);

ClosePmacEthernet();

}

 

SUBfunction:

int InitPmacEthernet()

{

int Ret;

 

if ((Ret = WSAStartup(MAKEWORD(2,2), &wsaData)) != 0)

{

printf("WSAStartup failed with error %d\n", Ret);

return WSA_START_ERROR;

}

 

// Create a new socket to make a client connection.

if ((sock = socket(AF_INET, SOCK_STREAM, 0))

== INVALID_SOCKET)

{

printf("socket failed with error %d\n", WSAGetLastError());

WSACleanup();

return SOCKET_CREATE_ERROR;

}

 

PmacAddr.sin_family = AF_INET;

PmacAddr.sin_port = htons(PMACPORT);

PmacAddr.sin_addr.s_addr = inet_addr(PMACIP);

 

// Make a connection to the server with socket s.

 

printf("We are trying to connect to %s:%d...\n",

inet_ntoa(PmacAddr.sin_addr), htons(PmacAddr.sin_port));

 

if (connect(sock, (SOCKADDR *) &PmacAddr, sizeof(PmacAddr))

== SOCKET_ERROR)

{

printf("connect failed with error %d\n", WSAGetLastError());

closesocket(sock);

WSACleanup();

Sleep(3000);

return CONNECT_ERROR;

}

 

printf("Our connection succeeded.\n");

Sleep(2000);

return 0;

}

int CALLBACK PmacSockGetResponse(char *outstr, char *instr)

{

EthCmd.RequestType = VR_DOWNLOAD;

EthCmd.Request = VR_PMAC_GETRESPONSE;

EthCmd.wValue = 0;

EthCmd.wIndex = 0;

EthCmd.wLength = htons( (WORD)strlen(outstr));

strncpy((char *)&EthCmd.bData[0],outstr,(WORD)strlen(outstr));

 

send(sock,(char*)&EthCmd,ETHERNETCMDSIZE + strlen(outstr),0);

recv(sock,(char*)&instr,1400,0);

return 0;

}

int CALLBACK PmacSockSendLine(char *outstr)

{

EthCmd.RequestType = VR_DOWNLOAD;

EthCmd.Request = VR_PMAC_SENDLINE;

EthCmd.wValue = 0;

EthCmd.wIndex = 0;

EthCmd.wLength = htons( (WORD)strlen(outstr));

strncpy((char *)&EthCmd.bData[0],outstr,(WORD)strlen(outstr));

 

send(sock, (char *)&EthCmd, ETHERNETCMDSIZE + strlen(outstr),0);

recv(sock,(char *)&EthCmd,1,0);

 

return 0;

}

 

The result is:

1.jpg.4544999713c968e7b504cded471637ba.jpg

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I think you are moving the pointer around instead of just putting data into it.

Should

recv(sock,(char*)&instr,1400,0);

be

recv(sock,(char*)instr,1400,0);

?

 

 

Hi,

We want to use RTX as host system. According to Ethernet Protocal, we write programs to communicate with clipper through sockets. If we send no-line commands, clipper would do Corresponding action such as "#2j+". But if we send single-line commands, the charcters responsed is null such as "I122". WHY? The programs are as follows:

 

main:

void main()

{

char Cmd_Clear = 18;

char Cmd1[10] = "I122=55";

char Cmd2[10] = "I122";

char *I122str = NULL;

 

 

Cmd[7] = 13; //Add at the end of sending command,

Cmd[4] = 13; //whether add or not ,the result is the same

 

InitPmacEthernet(); //Build connection

 

PmacSockPortSend(Cmd_Clear);

PmacSockSendLine("#2j+"); //Motor2 forward

 

PmacSockGetResponse(Cmd2,I122str);

printf("The original value of I122 is %s\n",I122str);

 

PmacSockGetResponse(Cmd2,I122str);

printf("Now, The value of I122 is %s\n",I122str);

 

Sleep(10000);

ClosePmacEthernet();

}

 

SUBfunction:

int InitPmacEthernet()

{

int Ret;

 

if ((Ret = WSAStartup(MAKEWORD(2,2), &wsaData)) != 0)

{

printf("WSAStartup failed with error %d\n", Ret);

return WSA_START_ERROR;

}

 

// Create a new socket to make a client connection.

if ((sock = socket(AF_INET, SOCK_STREAM, 0))

== INVALID_SOCKET)

{

printf("socket failed with error %d\n", WSAGetLastError());

WSACleanup();

return SOCKET_CREATE_ERROR;

}

 

PmacAddr.sin_family = AF_INET;

PmacAddr.sin_port = htons(PMACPORT);

PmacAddr.sin_addr.s_addr = inet_addr(PMACIP);

 

// Make a connection to the server with socket s.

 

printf("We are trying to connect to %s:%d...\n",

inet_ntoa(PmacAddr.sin_addr), htons(PmacAddr.sin_port));

 

if (connect(sock, (SOCKADDR *) &PmacAddr, sizeof(PmacAddr))

== SOCKET_ERROR)

{

printf("connect failed with error %d\n", WSAGetLastError());

closesocket(sock);

WSACleanup();recv(sock,(char*)&instr,1400,0);

Sleep(3000);

return CONNECT_ERROR;

}

 

printf("Our connection succeeded.\n");

Sleep(2000);

return 0;

}

int CALLBACK PmacSockGetResponse(char *outstr, char *instr)

{

EthCmd.RequestType = VR_DOWNLOAD;

EthCmd.Request = VR_PMAC_GETRESPONSE;

EthCmd.wValue = 0;

EthCmd.wIndex = 0;

EthCmd.wLength = htons( (WORD)strlen(outstr));

strncpy((char *)&EthCmd.bData[0],outstr,(WORD)strlen(outstr));

 

send(sock,(char*)&EthCmd,ETHERNETCMDSIZE + strlen(outstr),0);

recv(sock,(char*)&instr,1400,0);

return 0;

}

int CALLBACK PmacSockSendLine(char *outstr)

{

EthCmd.RequestType = VR_DOWNLOAD;

EthCmd.Request = VR_PMAC_SENDLINE;

EthCmd.wValue = 0;

EthCmd.wIndex = 0;

EthCmd.wLength = htons( (WORD)strlen(outstr));

strncpy((char *)&EthCmd.bData[0],outstr,(WORD)strlen(outstr));

 

send(sock, (char *)&EthCmd, ETHERNETCMDSIZE + strlen(outstr),0);

recv(sock,(char *)&EthCmd,1,0);

 

return 0;

}

 

The result is:

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I have modificated programs as you advised, but it did not work. Here are the programs, could you help me to find problems?

The header file can't be attached, I have changed it to txt file. Just rename the file.Thanks!

 

I think you are moving the pointer around instead of just putting data into it.

Should

recv(sock,(char*)&instr,1400,0);

be

recv(sock,(char*)instr,1400,0);

?

main.c

pmacethernet1.c

pmacethernet1.txt

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I have modificated programs as you advised, but it did not work. Here are the programs, could you help me to find problems?

The header file can't be attached, I have changed it to txt file. Just rename the file.Thanks!

 

I think you are moving the pointer around instead of just putting data into it.

Should

recv(sock,(char*)&instr,1400,0);

be

recv(sock,(char*)instr,1400,0);

?

 

Go to this forum link.

 

http://forums.deltatau.com/showthread.php?tid=57

 

In the zip file in the pmaceth/src folder is a functioning getresponse.

 

Don't worry that the title is Linux Driver and Comm for Turbo PMAC.zip because ethernet socket communication is very portable.

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I has received the data with the help of wireshark. Thanks

I have modificated programs as you advised, but it did not work. Here are the programs, could you help me to find problems?

The header file can't be attached, I have changed it to txt file. Just rename the file.Thanks!

 

I think you are moving the pointer around instead of just putting data into it.

Should

recv(sock,(char*)&instr,1400,0);

be

recv(sock,(char*)instr,1400,0);

?

 

Go to this forum link.

 

http://forums.deltatau.com/showthread.php?tid=57

 

In the zip file in the pmaceth/src folder is a functioning getresponse.

 

Don't worry that the title is Linux Driver and Comm for Turbo PMAC.zip because ethernet socket communication is very portable.

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