CH341T支持I2C主机模式，可以用来与各种I2C设备通信。以下是使用CH341T进行I2C通信的步骤和示例：
1. 初始化CH341T设备： 首先需要打开CH341T设备并进行初始化。这个步骤取决于您使用的具体API或库。
2. 配置I2C模式： CH341T需要被配置为I2C模式。通常通过发送特定的命令来完成。
3. I2C通信基本流程： - 发送开始信号 - 发送设备地址（包括读/写位） - 发送寄存器地址（如果需要） - 发送/接收数据 - 发送停止信号
4. 示例代码（使用CH341DLL）：
```cpp #include "ch341_dll.h" #include
#pragma comment(lib, "ch341_dll.lib")
bool I2C_ReadRegister(HANDLE device, UCHAR deviceAddr, UCHAR regAddr, UCHAR* data) { UCHAR buffer[3]; ULONG ioLength;
// 发送开始信号、设备地址和寄存器地址 buffer[0] = CH341A_CMD_I2C_STREAM; buffer[1] = CH341A_CMD_I2C_STM_STA; // 开始信号 buffer[2] = deviceAddr & 0xFE; // 写地址 ioLength = 3; if (!CH341WriteI2C(device, ioLength, buffer)) return false;
buffer[0] = CH341A_CMD_I2C_STREAM; buffer[1] = regAddr; // 寄存器地址 buffer[2] = CH341A_CMD_I2C_STM_STO; // 停止信号 ioLength = 3; if (!CH341WriteI2C(device, ioLength, buffer)) return false;
// 发送重复开始信号和读取命令 buffer[0] = CH341A_CMD_I2C_STREAM; buffer[1] = CH341A_CMD_I2C_STM_STA; // 重复开始信号 buffer[2] = deviceAddr | 0x01; // 读地址 ioLength = 3; if (!CH341WriteI2C(device, ioLength, buffer)) return false;
// 读取数据 buffer[0] = CH341A_CMD_I2C_STREAM; buffer[1] = CH341A_CMD_I2C_STM_IN; // 读入一个字节 buffer[2] = CH341A_CMD_I2C_STM_NAK; // 发送NAK buffer[3] = CH341A_CMD_I2C_STM_STO; // 停止信号 ioLength = 4; if (!CH341WriteI2C(device, ioLength, buffer)) return false;
ioLength = 1; if (!CH341ReadI2C(device, &ioLength, data)) return false;
return true; }
bool I2C_WriteRegister(HANDLE device, UCHAR deviceAddr, UCHAR regAddr, UCHAR data) { UCHAR buffer[5]; ULONG ioLength;
buffer[0] = CH341A_CMD_I2C_STREAM; buffer[1] = CH341A_CMD_I2C_STM_STA; // 开始信号 buffer[2] = deviceAddr & 0xFE; // 写地址 buffer[3] = regAddr; // 寄存器地址 buffer[4] = data; // 数据 ioLength = 5; if (!CH341WriteI2C(device, ioLength, buffer)) return false;
buffer[0] = CH341A_CMD_I2C_STREAM; buffer[1] = CH341A_CMD_I2C_STM_STO; // 停止信号 ioLength = 2; return CH341WriteI2C(device, ioLength, buffer); }
int main() { HANDLE h341 = CH341OpenDevice(0); if (h341 == INVALID_HANDLE_VALUE) { std::cout