我正在尝试在 PC 和 PC MCU PIC 之间进行 RS-232 通信。所以我首先用C++开始制作PC程序,它是没有错误的,根据cout
我制作的输出它应该工作的状态,但我想确定一下。所以我下载了超级终端并将 Tx 连接到串行 com 端口中的 Rx 引脚,但是每当我尝试连接超级终端时,它都会出错,说access denied (error 5)
当我尝试运行我的 C++ 程序时。我不明白问题出在哪里。这是完整的代码,如果问题是代码的问题,只是为了确保:
主.c:
#include <windows.h>
#include <winbase.h>
#include <iostream>
PDWORD sent;
char buf;
int main(){
DCB serial;
HANDLE hserial = CreateFile("\\\\.\\COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
serial.DCBlength = sizeof(DCB);
serial.BaudRate = CBR_9600;
serial.fBinary = true;
serial.fParity = false;
serial.ByteSize = 8;
serial.Parity = NOPARITY;
serial.StopBits = ONESTOPBIT;
char result = BuildCommDCB("baud=9600 parity=N data=8 stop=1", &serial);
if(result != 0){
std::cout << "DCB Structure Successfully Created!" << std::endl;
}else{
std::cout << "DCB Structure Creation Failed!" << std::endl;
}
if(hserial != INVALID_HANDLE_VALUE){
std::cout << "COM Port Handle Successfully Created!" << std::endl;
}else{
std::cout << "COM Port Handle Creation Failed!" << std::endl;
std::cout << GetLastError() << std::endl;
}
char res = WriteFile(hserial, "0xFF", 1, sent, NULL);
if(res != 0){
std::cout << "Writing to COM Port Successfull!" << std::endl;
}else{
std::cout << "Writing to COM Port Failed!" << std::endl;
std::cout << GetLastError() << std::endl;
}
CloseHandle(&hserial);
return 0;
}