问题描述
我试图通过从C＃应用程序我建立串行端口与收银机进行交流，我必须从制造商提供了一个小工具，它给了我有关设备，如固件版本等一些信息。
I am trying to communicate with a cash register through the serial port from a C# app I am building and I have a small utility provided from the manufacturer which gives me some info about the device like firmware version etc.
在协议规范它指出通信始于ENQASCII控制（0x05h）code在发送端，对此，对方必须回应ACK（0x06h）。然后，它包含的命令等的请求数据包可以发送
In the protocol specification it states that communication begins with the "ENQ" ASCII control (0x05h) code on the sender end, to which the receiver must respond "ACK"(0x06h). Then a request packet can be sent that contains a command etc.
连接设置：
- Baud rate: 9600 baud
- Parity: none
- Data: 8
- Stop: 1
- Flow control: none
传动方式：
Sender Receiver
Idle
Idle
Enquire
Acknowledge
Packet
Acknowledge
的分组结构如下（STX = 0x02h，ETX = 0x03h）：
The packet structure is the following (STX = 0x02h , ETX = 0x03h):
+-----+--------- - - -+-----+
| STX | Data | ETX |
+-----+--------- - - -+-----+
字段中的数据段之间用/：
Fields in data section are separated with '/':
+--------++---------+---------+---------+- - - +---------++----------+
| Header || Field 1 / Field 2 / .... / Field N || Checksum |
+--------++---------+---------+---------+- - - +---------++-
发送/接收规定：
Sender/Receiver states:
Sender Receiver
---------------------------------------------------
IDLE IDLE
ENQUIRE --------------------->
<--------------------- ACKNOWLEDGE
PACKET ---------------------> (verify error)
<--------------------- NOT ACKNOWLEDGE
PACKET ---------------------> (verify error)
<--------------------- NOT ACKNOWLEDGE
PACKET ---------------------> (verify success)
<--------------------- ACKNOWLEDGE
.
.
(Rest of packet exchange)
---------------------------------------------------
于是我试着沟通，我什么也没有回来。我下载了一个串行端口嗅探器，运行商工具和pressed获取设备版本按钮。我：
So I try to communicate and I get nothing back. I downloaded a serial port sniffer, run the manufacturers utility and pressed the "get device version" button. I got:
# Time Port Data ASCII
000001 20:03:06.484 COM2 << 18 18 18 05 ....
000002 20:03:06.500 COM2 >> 06 06 ..
000003 20:03:06.500 COM2 << 02 76 2F 36 35 03 .v/65.
000004 20:03:06.515 COM2 >> 02 30 30 2F 30 30 2F 30 32 2F 31 2E 30 31 2F 31 .00/00/02/1.01/1
000005 2E 30 31 2F 20 35 38 2F 35 30 30 30 2F 31 34 30 .01/ 58/5000/140
000006 2F 32 30 2F 31 30 2F 31 30 2F 20 36 2F 20 35 2F /20/10/10/ 6/ 5/
000007 33 30 2F 37 37 03 30/77.
000008 20:03:06.515 COM2 << 06 .
000009 20:03:07.015 COM2 >> 06 .
000010 20:03:07.015 COM2 << 18 18 18 05 02 61 2F 34 34 03 .....a/44.
000011 20:03:07.015 COM2 >> 06 02 30 30 2F 30 30 2F 30 32 2F 30 37 30 30 33 ..00/00/02/07003
000012 36 34 35 2F 31 2F CD D0 20 2F 44 4C 38 30 4C 49 645/1/ΞΞ /DL80LI
000013 56 31 52 31 35 20 20 20 20 20 2F 39 34 03 V1R15 /94.
000014 20:03:07.015 COM2 << 06 .
000015 20:03:07.515 COM2 >> 06 06 02 30 30 2F 30 30 2F 30 32 2F 31 38 31 31 ...00/00/02/1811
000016 31 31 11
000017 20:03:07.515 COM2 << 18 18 18 05 02 74 2F 36 33 03 .....t/63.
000018 20:03:07.531 COM2 >> 2F 31 39 32 30 30 39 2F 31 31 03 /192009/11.
000019 20:03:07.531 COM2 << 06 .
的**的 * 的**的 * 的**** （ENQ = 05，ACK = 06， STX = 02，ETX = 03，CAN = 18，'/'= 2F）
**********(ENQ = 05, ACK = 06, STX = 02 , ETX = 03, CAN = 18, '/' = 2F)
在code：
public partial class Form1 : Form
{
// Add this variable
string RxString;
public Form1()
{
InitializeComponent();
}
private void buttonStart_Click(object sender, EventArgs e)
{
serialPort1.PortName = "COM2";
serialPort1.BaudRate = 9600;
serialPort1.DataBits = 8;
serialPort1.Parity = System.IO.Ports.Parity.None;
serialPort1.StopBits = System.IO.Ports.StopBits.One;
serialPort1.DtrEnable = true;
serialPort1.RtsEnable = true;
try
{
serialPort1.Open();
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
if (serialPort1.IsOpen)
{
buttonStart.Enabled = false;
buttonStop.Enabled = true;
textBox1.ReadOnly = false;
}
}
private void buttonStop_Click(object sender, EventArgs e)
{
if (serialPort1.IsOpen)
{
serialPort1.Close();
buttonStart.Enabled = true;
buttonStop.Enabled = false;
textBox1.ReadOnly = true;
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (serialPort1.IsOpen) serialPort1.Close();
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// If the port is closed, don't try to send a character.
if (!serialPort1.IsOpen) return;
// If the port is Open, declare a char[] array with one element.
char[] buff = new char[1];
// Load element 0 with the key character.
buff[0] = e.KeyChar;
// Send the one character buffer.
serialPort1.Write(buff, 0, 1);
// Set the KeyPress event as handled so the character won't
// display locally. If you want it to display, omit the next line.
e.Handled = true;
}
private void DisplayText(object sender, EventArgs e)
{
textBox1.AppendText(RxString);
}
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
RxString = serialPort1.ReadExisting();
this.Invoke(new EventHandler(DisplayText));
}
private void buttonENQ_Click(object sender, EventArgs e)
{
// If the port is closed, don't try to send a character.
if (!serialPort1.IsOpen) return;
byte[] Buff = new byte[4];
Buff[0] = 0x18;
Buff[1] = 0x18;
Buff[2] = 0x18;
Buff[3] = 0x05;
serialPort1.Write(Buff, 0, 4);
}
}
我设法从我的应用程序发送的命令和记录的通信（18 18 18 05被发送），但我没有得到任何回应，在所有的寄存器。一切我送似乎是正确的。有任何想法吗？我失去了一些愚蠢的事？
I managed to send the commands from my app and logged the communication (18 18 18 05 is being sent) but I get no response at all from the register.Everything I send seems correct. Any ideas? Am I missing something stupid?
推荐答案
好吧我已经知道了。我找到了通信协议，其中它说的是旧版本： - 波特率：一十一万五千二百分之九千六百波特。所以我改变了波特率为115200和它的工作。这是愚蠢的。
Ok I 've got it. I found an older version of the communication protocol where it says: - Baud rate: 9600/115200 baud . So I changed the baudrate to 115200 and it worked. This is stupid.
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