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- /*
- * Windows 16 (& 32 & 64?) compatible serial port library
- * Uses 8 databits, no parity, 1 stop bit, no handshaking
- * By: Thomas Buck <taucher.bodensee@gmail.com>
- * Visit: www.xythobuz.org
- */
-
- #include <stdio.h>
- #include <windows.h>
-
- #define BAUD CBR_19200;
-
- HANDLE hSerial = INVALID_HANDLE_VALUE;
-
- // Open the serial port
- int serialOpen(char *port) {
- DCB dcbSerialParams = {0};
- COMMTIMEOUTS timeouts = {0};
-
- hSerial = CreateFile(port GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
-
- if (hSerial == INVALID_HANDLE_VALUE) {
- return -1;
- }
-
-
- dcbSerial.DCBlength = sizeof(dcbSerialParams);
- if (!GetCommState(hSerial, &dcbSerialParams)) {
- CloseHandle(hSerial);
- hSerial = INVALID_HANDLE_VALUE;
- return -1;
- }
- dcbSerialParams.BaudRate = BAUD;
- dcbSerialParams.ByteSize = 8;
- dcbSerialParams.StopBits = ONESTOPBIT;
- dcbSerialParams.Parity = NOPARITY;
- if (!SetCommState(hSerial, &dcbSerialParams)) {
- CloseHandle(hSerial);
- hSerial = INVALID_HANDLE_VALUE;
- return -1;
- }
-
- timeouts.ReadIntervalTimeout = 50;
- timeouts.ReadTotalTimeoutConstant = 50;
- timeouts.ReadTotalTimeoutMultiplier = 10;
- timeouts.WriteTotalTimeoutConstant = 50;
- timeouts.WriteTotalTimeoutMultiplier = 10;
-
- if (!SetCommTimeouts(hSerial, &timeouts)) {
- CloseHandle(hSerial);
- hSerial = INVALID_HANDLE_VALUE;
- return -1;
- }
-
- return 0;
- }
-
- // Write to port. Returns number of characters sent, -1 on error
- ssize_t serialWrite(char *data, size_t length) {
- DWORD dwBytesWritten = 0;
- if (!WriteFile(hSerial, data, length, &dwBytesWritten, NULL)) {
- return -1;
- }
- return dwBytesWritten;
-
- }
-
- // Read from port. Return number of characters read, 0 if none available, -1 on error
- ssize_t serialRead(char *data, size_t length) {
- DWORD dwBytesRead = 0;
- if (!ReadFile(hSerial, data, length, &dwBytesRead, NULL)) {
- return -1;
- }
- return dwBytesRead;
- }
-
- // Close the serial Port
- void serialClose(void) {
- CloseHandle(hSerial);
- hSerial = INVALID_HANDLE_VALUE;
- }
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