CH341_I2C IIC调试助手源码
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admin
at 2025-04-16 • 0人收藏 • 618人看过
有个项目用到了CH341A的IIC读写功能,直接和iic接口的设备通信
用到了[数据流函数] 可以一次多数据写入,
, 网上找了些资料和软件, 下面是源码
如果对iic不熟悉的可能会踩坑, 特此记录下:
iic从机地址需要左移一位, 比如大多数设备是:0x50 , 那么函数参数的地址就需要0x50<<1 , 即为 0xA0 才行
通信的波特率不要设置太大, 虽然ch341支持400K和750K , 但是建议还是用20K或者100K的, 要不然数据可能会失真
CH341StreamI2C 函数是读写函数, 都用它, 写入的话, 地址就是A0 , 读取需要在A0地址的最后位变更为1, 变成A1 , 这才代表读取.
using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace CH341T_I2C
{
// Token: 0x02000003 RID: 3
public partial class CH341_I2C : Form
{
// Token: 0x06000001 RID: 1
[DllImport("CH341DLL.DLL")]
public static extern int CH341OpenDevice(int iIndex);
// Token: 0x06000002 RID: 2
[DllImport("CH341DLL.DLL")]
public static extern bool CH341ResetDevice(int iIndex);
// Token: 0x06000003 RID: 3
[DllImport("CH341DLL.DLL")]
public static extern bool CH341SetDelaymS(int iIndex, int iDelay);
// Token: 0x06000004 RID: 4
[DllImport("CH341DLL.DLL")]
public unsafe static extern bool CH341ReadI2C(int iIndex, byte iDevice, byte iAddr, byte* oByte);
// Token: 0x06000005 RID: 5
[DllImport("CH341DLL.DLL")]
public static extern bool CH341WriteI2C(int iIndex, byte iDevice, byte iAddr, byte oByte);
// Token: 0x06000006 RID: 6
[DllImport("CH341DLL.DLL")]
public unsafe static extern bool CH341StreamI2C(int iIndex, int iWriteLength, byte* iWriteBuffer, int iReadLength, byte* oReadBuffer);
// Token: 0x06000007 RID: 7
[DllImport("CH341DLL.DLL")]
public static extern bool CH341SetStream(int iIndex, int iMode);
// Token: 0x06000008 RID: 8 RVA: 0x00002050 File Offset: 0x00000250
public CH341_I2C()
{
this.InitializeComponent();
Control.CheckForIllegalCrossThreadCalls = false;
}
// Token: 0x06000009 RID: 9 RVA: 0x0000206C File Offset: 0x0000026C
public void Connect_check_Handler()
{
for (;;)
{
Thread.Sleep(500);
if (CH341_I2C.CH341OpenDevice(this.CH341_driver_num) == -1)
{
CH341_I2C.CH341ResetDevice(0);
if (CH341_I2C.CH341OpenDevice(this.CH341_driver_num) == -1)
{
this.connect_Box.ForeColor = Color.Red;
this.connect_Box.Text = "未连接";
}
else
{
this.connect_Box.ForeColor = Color.Blue;
this.connect_Box.Text = "已连接";
}
}
else
{
this.connect_Box.ForeColor = Color.Blue;
this.connect_Box.Text = "已连接";
}
}
}
// Token: 0x0600000A RID: 10 RVA: 0x00002110 File Offset: 0x00000310
public void monitor_Handler()
{
for (;;)
{
if (this.read_data_str.do_ch341streami2c_mark)
{
this.read_data_str.do_ch341streami2c_time = this.read_data_str.do_ch341streami2c_time + 1;
if (this.read_data_str.do_ch341streami2c_time >= this.do_ch341streami2c_overtime)
{
CH341_I2C.CH341ResetDevice(this.read_data_str.iIndex);
this.read_data_str.do_ch341streami2c_time = 0;
}
}
Thread.Sleep(10);
}
}
// Token: 0x0600000B RID: 11 RVA: 0x00002174 File Offset: 0x00000374
private void Form1_Load(object sender, EventArgs e)
{
this.read_data_str.iIndex = 0;
this.connect_check_thread = new Thread(new ThreadStart(this.Connect_check_Handler));
this.connect_check_thread.IsBackground = true;
this.connect_check_thread.Start();
this.monitor_thread = new Thread(new ThreadStart(this.monitor_Handler));
this.monitor_thread.IsBackground = true;
this.monitor_thread.Start();
}
// Token: 0x0600000C RID: 12 RVA: 0x000021EC File Offset: 0x000003EC
public byte str_to_byte(string str)
{
byte[] bytes = Encoding.Default.GetBytes(str);
byte[] array = new byte[bytes.Length / 2];
for (int i = 0; i < bytes.Length; i++)
{
if (bytes[i] >= 97 && bytes[i] <= 102)
{
bytes[i] = (byte)(bytes[i] - 97 + 58);
}
else if (bytes[i] >= 65 && bytes[i] <= 70)
{
bytes[i] = (byte)(bytes[i] - 65 + 58);
}
}
for (int j = 0; j < bytes.Length / 2; j++)
{
array[j] = (byte)((int)(bytes[j * 2] - 48) << 4 | (int)(bytes[j * 2 + 1] - 48));
}
return array[0];
}
// Token: 0x0600000D RID: 13 RVA: 0x00002282 File Offset: 0x00000482
private void void_CH341StreamI2C_start()
{
this.read_data_str.do_ch341streami2c_mark = true;
this.read_data_str.do_ch341streami2c_time = 0;
}
// Token: 0x0600000E RID: 14 RVA: 0x0000229C File Offset: 0x0000049C
private void void_CH341StreamI2C_end()
{
this.read_data_str.do_ch341streami2c_mark = false;
this.read_data_str.do_ch341streami2c_time = 0;
}
// Token: 0x0600000F RID: 15 RVA: 0x000022B8 File Offset: 0x000004B8
private unsafe void write_button_Click(object sender, EventArgs e)
{
if (!this.WriteButtonClickErrorCheck())
{
return;
}
string text = this.send_Box.Text.Replace(" ", "");
if (text.Length < 2)
{
MessageBox.Show("写入的数据长度错误");
return;
}
byte[] bytes = Encoding.Default.GetBytes(text);
byte[] array = new byte[bytes.Length / 2];
for (int i = 0; i < bytes.Length; i++)
{
if (bytes[i] >= 97 && bytes[i] <= 102)
{
bytes[i] = (byte)(bytes[i] - 97 + 58);
}
else if (bytes[i] >= 65 && bytes[i] <= 70)
{
bytes[i] = (byte)(bytes[i] - 65 + 58);
}
}
for (int j = 0; j < bytes.Length / 2; j++)
{
array[j] = (byte)((int)(bytes[j * 2] - 48) << 4 | (int)(bytes[j * 2 + 1] - 48));
}
this.send_data_len_Box.Text = (bytes.Length / 2).ToString();
byte* oReadBuffer = stackalloc byte[(int)(UIntPtr)1];
byte* ptr = stackalloc byte[(int)(UIntPtr)(3 + bytes.Length / 2)];
*ptr = this.str_to_byte(this.addr_Box.Text);
if (this.register_Box.Text.Length == 2)
{
this.read_data_str.register_l = this.str_to_byte(this.register_Box.Text);
ptr[1] = this.read_data_str.register_l;
for (int k = 0; k < bytes.Length / 2; k++)
{
ptr[k + 2] = array[k];
}
CH341_I2C.CH341StreamI2C(this.read_data_str.iIndex, 2 + bytes.Length / 2, ptr, 0, oReadBuffer);
return;
}
if (this.register_Box.Text.Length == 4)
{
this.read_data_str.register_l = this.str_to_byte(this.register_Box.Text.Substring(2, 2));
this.read_data_str.register_h = this.str_to_byte(this.register_Box.Text.Substring(0, 2));
ptr[1] = this.read_data_str.register_h;
ptr[2] = this.read_data_str.register_l;
for (int l = 0; l < bytes.Length / 2; l++)
{
ptr[l + 3] = array[l];
}
CH341_I2C.CH341StreamI2C(this.read_data_str.iIndex, 3 + bytes.Length / 2, ptr, 0, oReadBuffer);
}
}
// Token: 0x06000010 RID: 16 RVA: 0x00002500 File Offset: 0x00000700
private bool ReadButtonClickErrorCheck()
{
if (this.read_data_len_Box.Text == "")
{
MessageBox.Show("读取长度为空");
return false;
}
if (this.addr_Box.Text.Length != 2)
{
MessageBox.Show("地址长度错误");
return false;
}
if (this.register_Box.Text.Length != 2 && this.register_Box.Text.Length != 4)
{
MessageBox.Show("寄存器长度错误，8位/16位");
return false;
}
return !(this.connect_Box.Text == "未连接");
}
// Token: 0x06000011 RID: 17 RVA: 0x000025A0 File Offset: 0x000007A0
private bool WriteButtonClickErrorCheck()
{
if (this.send_Box.Text == "")
{
MessageBox.Show("发送的数据为空");
return false;
}
if (this.addr_Box.Text.Length != 2)
{
MessageBox.Show("地址长度错误");
return false;
}
if (this.register_Box.Text.Length != 2 && this.register_Box.Text.Length != 4)
{
MessageBox.Show("寄存器长度错误，8位/16位");
return false;
}
return !(this.connect_Box.Text == "未连接");
}
// Token: 0x06000012 RID: 18 RVA: 0x00002640 File Offset: 0x00000840
private unsafe void read_button_Click(object sender, EventArgs e)
{
if (!this.ReadButtonClickErrorCheck())
{
return;
}
this.read_data_str.addr = (byte)(this.str_to_byte(this.addr_Box.Text) >> 1);
if (this.register_Box.Text.Length == 2)
{
this.read_data_str.register_l = this.str_to_byte(this.register_Box.Text.Substring(0, 2));
}
if (this.register_Box.Text.Length == 4)
{
this.read_data_str.register_l = this.str_to_byte(this.register_Box.Text.Substring(2, 2));
this.read_data_str.register_h = this.str_to_byte(this.register_Box.Text.Substring(0, 2));
}
this.read_data_str.read_data_len = int.Parse(this.read_data_len_Box.Text);
byte* ptr = stackalloc byte[(int)(UIntPtr)this.read_data_str.read_data_len];
byte* ptr2 = stackalloc byte[(int)(UIntPtr)3];
*ptr2 = this.str_to_byte(this.addr_Box.Text);
if (this.register_Box.Text.Length == 2)
{
ptr2[1] = this.read_data_str.register_l;
CH341_I2C.CH341StreamI2C(this.read_data_str.iIndex, 2, ptr2, 0, ptr);
}
else
{
ptr2[1] = this.read_data_str.register_h;
ptr2[2] = this.read_data_str.register_l;
CH341_I2C.CH341StreamI2C(this.read_data_str.iIndex, 3, ptr2, 0, ptr);
}
*ptr2 = ((byte)(this.str_to_byte(this.addr_Box.Text) | 1));
this.void_CH341StreamI2C_start();
if (!CH341_I2C.CH341StreamI2C(this.read_data_str.iIndex, 1, ptr2, this.read_data_str.read_data_len, ptr))
{
if (this.read_data_str.do_ch341streami2c_time < this.do_ch341streami2c_overtime)
{
CH341_I2C.CH341ResetDevice(this.read_data_str.iIndex);
}
Thread.Sleep(200);
return;
}
this.void_CH341StreamI2C_end();
for (int i = 0; i < this.read_data_str.read_data_len; i++)
{
this.receive_Box.AppendText(ptr[i].ToString("x2") + " ");
}
this.receive_Box.AppendText("\r\n");
}
// Token: 0x06000013 RID: 19 RVA: 0x0000286B File Offset: 0x00000A6B
private void read_data_len_Box_TextChanged(object sender, EventArgs e)
{
}
// Token: 0x06000014 RID: 20 RVA: 0x0000286D File Offset: 0x00000A6D
private void read_data_len_Box_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar < '0' || e.KeyChar > '9') && e.KeyChar != '\b')
{
e.Handled = true;
}
}
// Token: 0x06000015 RID: 21 RVA: 0x0000286D File Offset: 0x00000A6D
private void auto_send_time_Box_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar < '0' || e.KeyChar > '9') && e.KeyChar != '\b')
{
e.Handled = true;
}
}
// Token: 0x06000016 RID: 22 RVA: 0x00002893 File Offset: 0x00000A93
private void button3_Click(object sender, EventArgs e)
{
this.receive_Box.Text = "";
}
// Token: 0x06000017 RID: 23 RVA: 0x000028A5 File Offset: 0x00000AA5
private void Auto_read_Handler()
{
for (;;)
{
Thread.Sleep(this.auto_read_time);
this.read_button_Click(null, null);
}
}
// Token: 0x06000018 RID: 24 RVA: 0x000028BC File Offset: 0x00000ABC
private void auto_read_checkBox_CheckedChanged(object sender, EventArgs e)
{
if (this.auto_send_time_Box.Text == "")
{
if (this.auto_read_checkBox.Checked)
{
this.auto_read_checkBox.Checked = false;
}
return;
}
this.auto_read_time = int.Parse(this.auto_send_time_Box.Text);
if (this.auto_read_checkBox.Checked)
{
this.auto_read_thread = new Thread(new ThreadStart(this.Auto_read_Handler));
this.auto_read_thread.IsBackground = true;
this.auto_read_thread.Start();
return;
}
this.auto_read_thread.Abort();
}
// Token: 0x06000019 RID: 25 RVA: 0x0000286B File Offset: 0x00000A6B
private void auto_send_time_Box_TextChanged(object sender, EventArgs e)
{
}
// Token: 0x06000021 RID: 33 RVA: 0x0000286B File Offset: 0x00000A6B
private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
}
// Token: 0x06000022 RID: 34 RVA: 0x00002998 File Offset: 0x00000B98
private void CH341_I2C_FormClosing(object sender, FormClosingEventArgs e)
{
Environment.Exit(0);
}
// Token: 0x06000023 RID: 35 RVA: 0x000029A0 File Offset: 0x00000BA0
private void send_Box_KeyPress(object sender, KeyPressEventArgs e)
{
if ((e.KeyChar < '0' || e.KeyChar > '9') && (e.KeyChar < 'a' || e.KeyChar > 'f') && (e.KeyChar < 'A' || e.KeyChar > 'F') && e.KeyChar != ' ' && e.KeyChar != '\b')
{
e.Handled = true;
}
}
// Token: 0x06000024 RID: 36 RVA: 0x00002A03 File Offset: 0x00000C03
private void KToolStripMenuItem_Click(object sender, EventArgs e)
{
if (CH341_I2C.CH341SetStream(this.CH341_driver_num, 0))
{
MessageBox.Show("设置成功，20K速率");
return;
}
MessageBox.Show("设置失败");
}
// Token: 0x06000025 RID: 37 RVA: 0x00002A2A File Offset: 0x00000C2A
private void KToolStripMenuItem1_Click(object sender, EventArgs e)
{
if (CH341_I2C.CH341SetStream(this.CH341_driver_num, 1))
{
MessageBox.Show("设置成功，100K速率");
return;
}
MessageBox.Show("设置失败");
}
// Token: 0x06000026 RID: 38 RVA: 0x00002A51 File Offset: 0x00000C51
private void KToolStripMenuItem2_Click(object sender, EventArgs e)
{
if (CH341_I2C.CH341SetStream(this.CH341_driver_num, 2))
{
MessageBox.Show("设置成功，400K速率");
return;
}
MessageBox.Show("设置失败");
}
// Token: 0x06000027 RID: 39 RVA: 0x00002A78 File Offset: 0x00000C78
private void KToolStripMenuItem3_Click(object sender, EventArgs e)
{
if (CH341_I2C.CH341SetStream(this.CH341_driver_num, 3))
{
MessageBox.Show("设置成功，750K速率");
return;
}
MessageBox.Show("设置失败");
}
// Token: 0x06000028 RID: 40 RVA: 0x0000286B File Offset: 0x00000A6B
private void receive_Box_TextChanged(object sender, EventArgs e)
{
}
// Token: 0x06000029 RID: 41 RVA: 0x0000286B File Offset: 0x00000A6B
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
}
// Token: 0x04000008 RID: 8
private Thread connect_check_thread;
// Token: 0x04000009 RID: 9
private Thread auto_read_thread;
// Token: 0x0400000A RID: 10
private Thread monitor_thread;
// Token: 0x0400000B RID: 11
private int CH341_driver_num;
// Token: 0x0400000C RID: 12
private int do_ch341streami2c_overtime = 50;
// Token: 0x0400000D RID: 13
private int auto_read_time;
// Token: 0x0400000E RID: 14
private READ_DATA_STR read_data_str;
}
}
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