C# 怎样设置RTS和DTR

C# 怎样设置RTS和DTR

设置波特率用这个函数
BOOL SetCommState(
HANDLE hFile, // handle to communications device
LPDCB lpDCB // device-control block
);
Parameters
hFile
[in] Handle to the communications device. The CreateFile function returns this handle.
lpDCB
[in] Pointer to a DCB structure that contains the configuration information for the specified communications device.

DCB的定义如下：

typedef struct _DCB {
DWORD DCBlength;
DWORD BaudRate;
DWORD fBinary: 1;
DWORD fParity: 1;
DWORD fOutxCtsFlow:1;
DWORD fOutxDsrFlow:1;
DWORD fDtrControl:2;
DWORD fDsrSensitivity:1;
DWORD fTXContinueOnXoff:1;
DWORD fOutX: 1;
DWORD fInX: 1;
DWORD fErrorChar: 1;
DWORD fNull: 1;
DWORD fRtsControl:2;
DWORD fAbortOnError:1;
DWORD fDummy2:17;
WORD wReserved;
WORD XonLim;
WORD XoffLim;
BYTE ByteSize;
BYTE Parity;
BYTE StopBits;
char XonChar;
char XoffChar;
char ErrorChar;
char EofChar;
char EvtChar;
WORD wReserved1;
} DCB;

看一下windows api 里面的setcommstate函数 pc与单片机的通讯一般都是3线制的,即rxd txd gnd, dsr与dtr没有连接,理论上没什么影响 一般的通讯设置都是 波特率,校验位,长度,停止位 常用的都是 9600,0,8,1 等,看看你的校验位,长度,停止位pc上设置的是否与单片机相符