81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
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//
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// File: win32_serial.h
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// Author: Peter Slattery
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// Creation Date: 2020-10-01
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//
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#ifndef WIN32_SERIAL_H
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DCB
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Win32SerialPort_GetState(HANDLE ComPortHandle)
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{
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DCB ControlSettings = {0};
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ZeroStruct(&ControlSettings);
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ControlSettings.DCBlength = sizeof(ControlSettings);
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bool Success = GetCommState(ComPortHandle, &ControlSettings);
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Assert(Success);
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return ControlSettings;
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}
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void
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Win32SerialPort_SetState(HANDLE ComPortHandle, u32 BaudRate, u8 ByteSize, u8 Parity, u8 StopBits)
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{
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DCB ControlSettings = Win32SerialPort_GetState(ComPortHandle);
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//PrintCommState(ControlSettings);
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// TODO(pjs): Validate BaudRate - There's only certain rates that are valid right?
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ControlSettings.BaudRate = BaudRate;
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ControlSettings.ByteSize = ByteSize;
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ControlSettings.Parity = Parity;
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ControlSettings.StopBits = StopBits;
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bool Success = SetCommState(ComPortHandle, &ControlSettings);
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}
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HANDLE
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Win32SerialPort_Open(char* PortName)
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{
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HANDLE ComPortHandle = CreateFile(PortName,
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GENERIC_READ | GENERIC_WRITE,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL, // Default Security Attr
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OPEN_EXISTING,
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0, // Not overlapped I/O
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NULL);
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if (ComPortHandle == INVALID_HANDLE_VALUE)
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{
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// Error
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s32 Error = GetLastError();
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InvalidCodePath;
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}
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return ComPortHandle;
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}
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void
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Win32SerialPort_Close(HANDLE PortHandle)
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{
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CloseHandle(PortHandle);
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}
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void
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Win32SerialPort_Write(HANDLE PortHandle, gs_data Buffer)
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{
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DWORD BytesWritten = 0;
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if (WriteFile(PortHandle, Buffer.Memory, Buffer.Size, &BytesWritten, NULL))
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{
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if (BytesWritten != Buffer.Size)
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{
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OutputDebugString("Error: Entire buffer not written.\n");
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}
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}
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else
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{
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OutputDebugStringA("Error: Unable to write to port\n");
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}
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}
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#define WIN32_SERIAL_H
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#endif // WIN32_SERIAL_H
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