[proxmark3-svn] / client / uart.c

/*
 * Generic uart / rs232/ serial port library
 *
 * Copyright (c) 2013, Roel Verdult
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @file uart.c
 * @brief
 *
 */

#include "uart.h"

// Test if we are dealing with unix operating systems
#ifndef _WIN32

#include <termios.h>
typedef struct termios term_info;
typedef struct {
  int fd;           // Serial port file descriptor
  term_info tiOld;  // Terminal info before using the port
  term_info tiNew;  // Terminal info during the transaction
} serial_port_unix;

// Set time-out on 30 miliseconds
const struct timeval timeout = {
  .tv_sec  =     0, // 0 second
  .tv_usec = 30000  // 30000 micro seconds
};

serial_port uart_open(const char* pcPortName)
{
  serial_port_unix* sp = malloc(sizeof(serial_port_unix));
  if (sp == 0) return INVALID_SERIAL_PORT;
  
  sp->fd = open(pcPortName, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK);
  if(sp->fd == -1) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }

  // Finally figured out a way to claim a serial port interface under unix
  // We just try to set a (advisory) lock on the file descriptor
  struct flock fl;
  fl.l_type   = F_WRLCK;
  fl.l_whence = SEEK_SET;
  fl.l_start  = 0;
  fl.l_len    = 0;
  fl.l_pid    = getpid();
  
  // Does the system allows us to place a lock on this file descriptor
  if (fcntl(sp->fd, F_SETLK, &fl) == -1) {
    // A conflicting lock is held by another process
    free(sp);
    return CLAIMED_SERIAL_PORT;
  }

  // Try to retrieve the old (current) terminal info struct
  if(tcgetattr(sp->fd,&sp->tiOld) == -1) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }
  
  // Duplicate the (old) terminal info struct
  sp->tiNew = sp->tiOld;
  
  // Configure the serial port
  sp->tiNew.c_cflag = CS8 | CLOCAL | CREAD;
  sp->tiNew.c_iflag = IGNPAR;
  sp->tiNew.c_oflag = 0;
  sp->tiNew.c_lflag = 0;
    
  // Block until n bytes are received
  sp->tiNew.c_cc[VMIN] = 0;
  // Block until a timer expires (n * 100 mSec.)
  sp->tiNew.c_cc[VTIME] = 0;
  
  // Try to set the new terminal info struct
  if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }
  
  // Flush all lingering data that may exist
  tcflush(sp->fd, TCIOFLUSH);

  return sp;
}

void uart_close(const serial_port sp) {
  serial_port_unix* spu = (serial_port_unix*)sp;
  tcflush(spu->fd,TCIOFLUSH);
  tcsetattr(spu->fd,TCSANOW,&(spu->tiOld));
  struct flock fl;
  fl.l_type   = F_UNLCK;
  fl.l_whence = SEEK_SET;
  fl.l_start  = 0;
  fl.l_len    = 0;
  fl.l_pid    = getpid();

  // Does the system allows us to place a lock on this file descriptor
  int err = fcntl(spu->fd, F_SETLK, &fl);
  if ( err == -1) {
     //perror("fcntl");
  }  
  close(spu->fd);
  free(sp);
}

bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
  const serial_port_unix* spu = (serial_port_unix*)sp;
  speed_t stPortSpeed;
  switch (uiPortSpeed) {
    case 0: stPortSpeed = B0; break;
    case 50: stPortSpeed = B50; break;
    case 75: stPortSpeed = B75; break;
    case 110: stPortSpeed = B110; break;
    case 134: stPortSpeed = B134; break;
    case 150: stPortSpeed = B150; break;
    case 300: stPortSpeed = B300; break;
    case 600: stPortSpeed = B600; break;
    case 1200: stPortSpeed = B1200; break;
    case 1800: stPortSpeed = B1800; break;
    case 2400: stPortSpeed = B2400; break;
    case 4800: stPortSpeed = B4800; break;
    case 9600: stPortSpeed = B9600; break;
    case 19200: stPortSpeed = B19200; break;
    case 38400: stPortSpeed = B38400; break;
#  ifdef B57600
    case 57600: stPortSpeed = B57600; break;
#  endif
#  ifdef B115200
    case 115200: stPortSpeed = B115200; break;
#  endif
#  ifdef B230400
    case 230400: stPortSpeed = B230400; break;
#  endif
#  ifdef B460800
    case 460800: stPortSpeed = B460800; break;
#  endif
#  ifdef B921600
    case 921600: stPortSpeed = B921600; break;
#  endif
    default: return false;
  };
  struct termios ti;
  if (tcgetattr(spu->fd,&ti) == -1) return false;
  // Set port speed (Input and Output)
  cfsetispeed(&ti,stPortSpeed);
  cfsetospeed(&ti,stPortSpeed);
  return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
}

uint32_t uart_get_speed(const serial_port sp) {
  struct termios ti;
  uint32_t uiPortSpeed;
  const serial_port_unix* spu = (serial_port_unix*)sp;
  if (tcgetattr(spu->fd,&ti) == -1) return 0;
  // Set port speed (Input)
  speed_t stPortSpeed = cfgetispeed(&ti);
  switch (stPortSpeed) {
    case B0: uiPortSpeed = 0; break;
    case B50: uiPortSpeed = 50; break;
    case B75: uiPortSpeed = 75; break;
    case B110: uiPortSpeed = 110; break;
    case B134: uiPortSpeed = 134; break;
    case B150: uiPortSpeed = 150; break;
    case B300: uiPortSpeed = 300; break;
    case B600: uiPortSpeed = 600; break;
    case B1200: uiPortSpeed = 1200; break;
    case B1800: uiPortSpeed = 1800; break;
    case B2400: uiPortSpeed = 2400; break;
    case B4800: uiPortSpeed = 4800; break;
    case B9600: uiPortSpeed = 9600; break;
    case B19200: uiPortSpeed = 19200; break;
    case B38400: uiPortSpeed = 38400; break;
#  ifdef B57600
    case B57600: uiPortSpeed = 57600; break;
#  endif
#  ifdef B115200
    case B115200: uiPortSpeed = 115200; break;
#  endif
#  ifdef B230400
    case B230400: uiPortSpeed = 230400; break;
#  endif
#  ifdef B460800
    case B460800: uiPortSpeed = 460800; break;
#  endif
#  ifdef B921600
    case B921600: uiPortSpeed = 921600; break;
#  endif
    default: return 0;
  };
  return uiPortSpeed;
}

bool uart_set_parity(serial_port sp, serial_port_parity spp) {
  struct termios ti;
  const serial_port_unix* spu = (serial_port_unix*)sp;
  if (tcgetattr(spu->fd,&ti) == -1) return false;
  switch(spp) {
    case SP_INVALID: return false;
    case SP_NONE: ti.c_cflag &= ~(PARENB | PARODD); break;
    case SP_EVEN: ti.c_cflag |= PARENB; ti.c_cflag &= ~(PARODD); break;
    case SP_ODD: ti.c_cflag |= PARENB | PARODD; break;
  }
  return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
}

serial_port_parity uart_get_parity(const serial_port sp) {
  struct termios ti;
  const serial_port_unix* spu = (serial_port_unix*)sp;
  if (tcgetattr(spu->fd,&ti) == -1) return SP_INVALID;
  
  if (ti.c_cflag & PARENB) {
    if (ti.c_cflag & PARODD) {
      return SP_ODD;
    } else {
      return SP_EVEN;
    }
  } else {
    return SP_NONE;
  }
}

bool uart_cts(const serial_port sp) {
  char status;
  if (ioctl(((serial_port_unix*)sp)->fd,TIOCMGET,&status) < 0) return false;
  return (status & TIOCM_CTS);
}

bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {

  int res;
  int byteCount;
  fd_set rfds;
  struct timeval tv;
  
  // Reset the output count
  *pszRxLen = 0;
  
  do {
    // Reset file descriptor
    FD_ZERO(&rfds);
    FD_SET(((serial_port_unix*)sp)->fd,&rfds);
    tv = timeout;
    res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv);
    
    // Read error
    if (res < 0) {
      return false;
    }
 
    // Read time-out
    if (res == 0) {
      if (*pszRxLen == 0) {
        // Error, we received no data
        return false;
      } else {
        // We received some data, but nothing more is available
        return true;
      }
    }
 
    // Retrieve the count of the incoming bytes
    res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
    if (res < 0) return false;

    // There is something available, read the data
    res = read(((serial_port_unix*)sp)->fd,pbtRx+(*pszRxLen),byteCount);

    // Stop if the OS has some troubles reading the data
    if (res <= 0) return false;
 
    *pszRxLen += res;

    if(res==byteCount)
        return true;
    
  } while (byteCount);

  return true;
}

bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
  int32_t res;
  size_t szPos = 0;
  fd_set rfds;
  struct timeval tv;
  
  while (szPos < szTxLen) {
    // Reset file descriptor
    FD_ZERO(&rfds);
    FD_SET(((serial_port_unix*)sp)->fd,&rfds);
    tv = timeout;
    res = select(((serial_port_unix*)sp)->fd+1, NULL, &rfds, NULL, &tv);
    
    // Write error
    if (res < 0) {
		printf("write error\n");
		return false;
    }
    
    // Write time-out
    if (res == 0) {
		printf("write time-out\n");
		return false;
    }
    
    // Send away the bytes
    res = write(((serial_port_unix*)sp)->fd,pbtTx+szPos,szTxLen-szPos);
    
    // Stop if the OS has some troubles sending the data
    if (res <= 0) {
		printf("os troubles\n");
		return false;
	}
    
    szPos += res;
  }
  return true;
}

#else
// The windows serial port implementation

typedef struct {
  HANDLE hPort;     // Serial port handle
  DCB dcb;          // Device control settings
  COMMTIMEOUTS ct;  // Serial port time-out configuration
} serial_port_windows;

void upcase(char *p) {
  while(*p != '\0') {
    if(*p >= 97 && *p <= 122) {
      *p -= 32;
    }
    ++p;
  }
}

serial_port uart_open(const char* pcPortName) {
  char acPortName[255];
  serial_port_windows* sp = malloc(sizeof(serial_port_windows));
  
  // Copy the input "com?" to "\\.\COM?" format
  sprintf(acPortName,"\\\\.\\%s",pcPortName);
  upcase(acPortName);
  
  // Try to open the serial port
  sp->hPort = CreateFileA(acPortName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
  if (sp->hPort == INVALID_HANDLE_VALUE) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }
  
  // Prepare the device control
  memset(&sp->dcb, 0, sizeof(DCB));
  sp->dcb.DCBlength = sizeof(DCB);
  if(!BuildCommDCBA("baud=115200 parity=N data=8 stop=1",&sp->dcb)) {
		uart_close(sp);
		return INVALID_SERIAL_PORT;
	}
  
  // Update the active serial port
  if(!SetCommState(sp->hPort,&sp->dcb)) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }
  
  sp->ct.ReadIntervalTimeout         = 1;
  sp->ct.ReadTotalTimeoutMultiplier  = 1;
  sp->ct.ReadTotalTimeoutConstant    = 30;
  sp->ct.WriteTotalTimeoutMultiplier = 1;
  sp->ct.WriteTotalTimeoutConstant   = 30;
  
  if(!SetCommTimeouts(sp->hPort,&sp->ct)) {
    uart_close(sp);
    return INVALID_SERIAL_PORT;
  }
  
  PurgeComm(sp->hPort, PURGE_RXABORT | PURGE_RXCLEAR);
  
  return sp;
}

void uart_close(const serial_port sp) {
  CloseHandle(((serial_port_windows*)sp)->hPort);
  free(sp);
}

bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
  serial_port_windows* spw;
  spw = (serial_port_windows*)sp;
  spw->dcb.BaudRate = uiPortSpeed;
  return SetCommState(spw->hPort, &spw->dcb);
}

uint32_t uart_get_speed(const serial_port sp) {
  const serial_port_windows* spw = (serial_port_windows*)sp;
  if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
    return spw->dcb.BaudRate;
  }
  return 0;
}

bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
  ReadFile(((serial_port_windows*)sp)->hPort,pbtRx,*pszRxLen,(LPDWORD)pszRxLen,NULL);
  return (*pszRxLen != 0);
}

bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
  DWORD dwTxLen = 0;
  return WriteFile(((serial_port_windows*)sp)->hPort, pbtTx, szTxLen, &dwTxLen, NULL);
  return (dwTxLen != 0);
}

#endif
Commit	Line	Data
5bcc76c4	1	/*
13dbdd6b	2	* Generic uart / rs232/ serial port library
5bcc76c4	3	*
13dbdd6b	4	* Copyright (c) 2013, Roel Verdult
5bcc76c4	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	* 3. Neither the name of the copyright holders nor the
	15	* names of its contributors may be used to endorse or promote products
	16	* derived from this software without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
	19	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	20	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	21	* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
	22	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	23	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	24	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	25	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	27	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	28	*
	29	* @file uart.c
	30	* @brief
	31	*
5bcc76c4	32	*/
	33
	34	#include "uart.h"
5bcc76c4	35
	36	// Test if we are dealing with unix operating systems
	37	#ifndef _WIN32
	38
	39	#include <termios.h>
	40	typedef struct termios term_info;
	41	typedef struct {
	42	int fd; // Serial port file descriptor
	43	term_info tiOld; // Terminal info before using the port
	44	term_info tiNew; // Terminal info during the transaction
	45	} serial_port_unix;
	46
	47	// Set time-out on 30 miliseconds
13dbdd6b	48	const struct timeval timeout = {
5bcc76c4	49	.tv_sec = 0, // 0 second
	50	.tv_usec = 30000 // 30000 micro seconds
	51	};
	52
5bcc76c4	53	serial_port uart_open(const char* pcPortName)
	54	{
	55	serial_port_unix* sp = malloc(sizeof(serial_port_unix));
5bcc76c4	56	if (sp == 0) return INVALID_SERIAL_PORT;
13dbdd6b	57
5bcc76c4	58	sp->fd = open(pcPortName, O_RDWR \| O_NOCTTY \| O_NDELAY \| O_NONBLOCK);
62ee4fed	59	if(sp->fd == -1) {
5bcc76c4	60	uart_close(sp);
	61	return INVALID_SERIAL_PORT;
	62	}
62ee4fed	63
	64	// Finally figured out a way to claim a serial port interface under unix
	65	// We just try to set a (advisory) lock on the file descriptor
	66	struct flock fl;
	67	fl.l_type = F_WRLCK;
	68	fl.l_whence = SEEK_SET;
	69	fl.l_start = 0;
	70	fl.l_len = 0;
	71	fl.l_pid = getpid();
13dbdd6b	72
62ee4fed	73	// Does the system allows us to place a lock on this file descriptor
	74	if (fcntl(sp->fd, F_SETLK, &fl) == -1) {
	75	// A conflicting lock is held by another process
1b492a97	76	free(sp);
62ee4fed	77	return CLAIMED_SERIAL_PORT;
5bcc76c4	78	}
62ee4fed	79
	80	// Try to retrieve the old (current) terminal info struct
	81	if(tcgetattr(sp->fd,&sp->tiOld) == -1) {
5bcc76c4	82	uart_close(sp);
62ee4fed	83	return INVALID_SERIAL_PORT;
5bcc76c4	84	}
13dbdd6b	85
62ee4fed	86	// Duplicate the (old) terminal info struct
5bcc76c4	87	sp->tiNew = sp->tiOld;
13dbdd6b	88
62ee4fed	89	// Configure the serial port
5bcc76c4	90	sp->tiNew.c_cflag = CS8 \| CLOCAL \| CREAD;
62ee4fed	91	sp->tiNew.c_iflag = IGNPAR;
5bcc76c4	92	sp->tiNew.c_oflag = 0;
5bcc76c4	93	sp->tiNew.c_lflag = 0;
62ee4fed	94
	95	// Block until n bytes are received
	96	sp->tiNew.c_cc[VMIN] = 0;
	97	// Block until a timer expires (n * 100 mSec.)
	98	sp->tiNew.c_cc[VTIME] = 0;
0a24369c	99
62ee4fed	100	// Try to set the new terminal info struct
62ee4fed	101	if(tcsetattr(sp->fd,TCSANOW,&sp->tiNew) == -1) {
5bcc76c4	102	uart_close(sp);
	103	return INVALID_SERIAL_PORT;
	104	}
13dbdd6b	105
62ee4fed	106	// Flush all lingering data that may exist
0a24369c	107	tcflush(sp->fd, TCIOFLUSH);
62ee4fed	108
5bcc76c4	109	return sp;
	110	}
	111
62ee4fed	112	void uart_close(const serial_port sp) {
	113	serial_port_unix* spu = (serial_port_unix*)sp;
	114	tcflush(spu->fd,TCIOFLUSH);
	115	tcsetattr(spu->fd,TCSANOW,&(spu->tiOld));
	116	struct flock fl;
	117	fl.l_type = F_UNLCK;
	118	fl.l_whence = SEEK_SET;
	119	fl.l_start = 0;
	120	fl.l_len = 0;
	121	fl.l_pid = getpid();
b85385a0	122
b85385a0	123	// Does the system allows us to place a lock on this file descriptor
9965e0d1	124	int err = fcntl(spu->fd, F_SETLK, &fl);
b85385a0	125	if ( err == -1) {
04da5cd9	126	//perror("fcntl");
b85385a0	127	}
62ee4fed	128	close(spu->fd);
	129	free(sp);
	130	}
	131
13dbdd6b	132	bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
5bcc76c4	133	const serial_port_unix* spu = (serial_port_unix*)sp;
62ee4fed	134	speed_t stPortSpeed;
	135	switch (uiPortSpeed) {
	136	case 0: stPortSpeed = B0; break;
	137	case 50: stPortSpeed = B50; break;
	138	case 75: stPortSpeed = B75; break;
	139	case 110: stPortSpeed = B110; break;
	140	case 134: stPortSpeed = B134; break;
	141	case 150: stPortSpeed = B150; break;
	142	case 300: stPortSpeed = B300; break;
	143	case 600: stPortSpeed = B600; break;
	144	case 1200: stPortSpeed = B1200; break;
	145	case 1800: stPortSpeed = B1800; break;
	146	case 2400: stPortSpeed = B2400; break;
	147	case 4800: stPortSpeed = B4800; break;
	148	case 9600: stPortSpeed = B9600; break;
	149	case 19200: stPortSpeed = B19200; break;
	150	case 38400: stPortSpeed = B38400; break;
	151	# ifdef B57600
	152	case 57600: stPortSpeed = B57600; break;
	153	# endif
	154	# ifdef B115200
	155	case 115200: stPortSpeed = B115200; break;
	156	# endif
	157	# ifdef B230400
	158	case 230400: stPortSpeed = B230400; break;
	159	# endif
	160	# ifdef B460800
	161	case 460800: stPortSpeed = B460800; break;
	162	# endif
	163	# ifdef B921600
	164	case 921600: stPortSpeed = B921600; break;
	165	# endif
	166	default: return false;
	167	};
	168	struct termios ti;
	169	if (tcgetattr(spu->fd,&ti) == -1) return false;
	170	// Set port speed (Input and Output)
	171	cfsetispeed(&ti,stPortSpeed);
	172	cfsetospeed(&ti,stPortSpeed);
	173	return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
5bcc76c4	174	}
5bcc76c4	175
13dbdd6b	176	uint32_t uart_get_speed(const serial_port sp) {
62ee4fed	177	struct termios ti;
62ee4fed	178	uint32_t uiPortSpeed;
5bcc76c4	179	const serial_port_unix* spu = (serial_port_unix*)sp;
62ee4fed	180	if (tcgetattr(spu->fd,&ti) == -1) return 0;
	181	// Set port speed (Input)
	182	speed_t stPortSpeed = cfgetispeed(&ti);
	183	switch (stPortSpeed) {
	184	case B0: uiPortSpeed = 0; break;
	185	case B50: uiPortSpeed = 50; break;
	186	case B75: uiPortSpeed = 75; break;
	187	case B110: uiPortSpeed = 110; break;
	188	case B134: uiPortSpeed = 134; break;
	189	case B150: uiPortSpeed = 150; break;
	190	case B300: uiPortSpeed = 300; break;
	191	case B600: uiPortSpeed = 600; break;
	192	case B1200: uiPortSpeed = 1200; break;
	193	case B1800: uiPortSpeed = 1800; break;
	194	case B2400: uiPortSpeed = 2400; break;
	195	case B4800: uiPortSpeed = 4800; break;
	196	case B9600: uiPortSpeed = 9600; break;
	197	case B19200: uiPortSpeed = 19200; break;
	198	case B38400: uiPortSpeed = 38400; break;
	199	# ifdef B57600
	200	case B57600: uiPortSpeed = 57600; break;
	201	# endif
	202	# ifdef B115200
	203	case B115200: uiPortSpeed = 115200; break;
	204	# endif
	205	# ifdef B230400
	206	case B230400: uiPortSpeed = 230400; break;
	207	# endif
	208	# ifdef B460800
	209	case B460800: uiPortSpeed = 460800; break;
	210	# endif
	211	# ifdef B921600
	212	case B921600: uiPortSpeed = 921600; break;
	213	# endif
	214	default: return 0;
	215	};
5bcc76c4	216	return uiPortSpeed;
	217	}
	218
62ee4fed	219	bool uart_set_parity(serial_port sp, serial_port_parity spp) {
	220	struct termios ti;
	221	const serial_port_unix* spu = (serial_port_unix*)sp;
	222	if (tcgetattr(spu->fd,&ti) == -1) return false;
	223	switch(spp) {
	224	case SP_INVALID: return false;
	225	case SP_NONE: ti.c_cflag &= ~(PARENB \| PARODD); break;
	226	case SP_EVEN: ti.c_cflag \|= PARENB; ti.c_cflag &= ~(PARODD); break;
	227	case SP_ODD: ti.c_cflag \|= PARENB \| PARODD; break;
	228	}
	229	return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
	230	}
	231
	232	serial_port_parity uart_get_parity(const serial_port sp) {
	233	struct termios ti;
	234	const serial_port_unix* spu = (serial_port_unix*)sp;
	235	if (tcgetattr(spu->fd,&ti) == -1) return SP_INVALID;
	236
	237	if (ti.c_cflag & PARENB) {
	238	if (ti.c_cflag & PARODD) {
	239	return SP_ODD;
	240	} else {
	241	return SP_EVEN;
	242	}
	243	} else {
	244	return SP_NONE;
	245	}
5bcc76c4	246	}
5bcc76c4	247
13dbdd6b	248	bool uart_cts(const serial_port sp) {
5bcc76c4	249	char status;
	250	if (ioctl(((serial_port_unix*)sp)->fd,TIOCMGET,&status) < 0) return false;
	251	return (status & TIOCM_CTS);
	252	}
	253
13dbdd6b	254	bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
62ee4fed	255
5bcc76c4	256	int res;
	257	int byteCount;
	258	fd_set rfds;
	259	struct timeval tv;
13dbdd6b	260
13dbdd6b	261	// Reset the output count
5bcc76c4	262	*pszRxLen = 0;
13dbdd6b	263
5bcc76c4	264	do {
	265	// Reset file descriptor
	266	FD_ZERO(&rfds);
	267	FD_SET(((serial_port_unix*)sp)->fd,&rfds);
	268	tv = timeout;
	269	res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv);
13dbdd6b	270
5bcc76c4	271	// Read error
5bcc76c4	272	if (res < 0) {
5bcc76c4	273	return false;
5bcc76c4	274	}
babfcaa0	275
5bcc76c4	276	// Read time-out
	277	if (res == 0) {
	278	if (*pszRxLen == 0) {
	279	// Error, we received no data
5bcc76c4	280	return false;
	281	} else {
	282	// We received some data, but nothing more is available
	283	return true;
	284	}
	285	}
babfcaa0	286
5bcc76c4	287	// Retrieve the count of the incoming bytes
	288	res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
	289	if (res < 0) return false;
babfcaa0	290
5bcc76c4	291	// There is something available, read the data
5bcc76c4	292	res = read(((serial_port_unix)sp)->fd,pbtRx+(pszRxLen),byteCount);
babfcaa0	293
5bcc76c4	294	// Stop if the OS has some troubles reading the data
5bcc76c4	295	if (res <= 0) return false;
babfcaa0	296
5bcc76c4	297	*pszRxLen += res;
babfcaa0	298
	299	if(res==byteCount)
	300	return true;
13dbdd6b	301
5bcc76c4	302	} while (byteCount);
babfcaa0	303
5bcc76c4	304	return true;
	305	}
	306
13dbdd6b	307	bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
5bcc76c4	308	int32_t res;
	309	size_t szPos = 0;
	310	fd_set rfds;
	311	struct timeval tv;
13dbdd6b	312
62ee4fed	313	while (szPos < szTxLen) {
5bcc76c4	314	// Reset file descriptor
	315	FD_ZERO(&rfds);
	316	FD_SET(((serial_port_unix*)sp)->fd,&rfds);
	317	tv = timeout;
	318	res = select(((serial_port_unix*)sp)->fd+1, NULL, &rfds, NULL, &tv);
13dbdd6b	319
5bcc76c4	320	// Write error
5bcc76c4	321	if (res < 0) {
e772774b	322	printf("write error\n");
e772774b	323	return false;
5bcc76c4	324	}
13dbdd6b	325
5bcc76c4	326	// Write time-out
5bcc76c4	327	if (res == 0) {
e772774b	328	printf("write time-out\n");
e772774b	329	return false;
5bcc76c4	330	}
13dbdd6b	331
5bcc76c4	332	// Send away the bytes
	333	res = write(((serial_port_unix*)sp)->fd,pbtTx+szPos,szTxLen-szPos);
	334
	335	// Stop if the OS has some troubles sending the data
e772774b	336	if (res <= 0) {
	337	printf("os troubles\n");
	338	return false;
	339	}
13dbdd6b	340
5bcc76c4	341	szPos += res;
	342	}
	343	return true;
	344	}
	345
	346	#else
	347	// The windows serial port implementation
	348
13dbdd6b	349	typedef struct {
5bcc76c4	350	HANDLE hPort; // Serial port handle
	351	DCB dcb; // Device control settings
	352	COMMTIMEOUTS ct; // Serial port time-out configuration
	353	} serial_port_windows;
	354
a0bbdb76	355	void upcase(char *p) {
62ee4fed	356	while(*p != '\0') {
	357	if(p >= 97 && p <= 122) {
	358	*p -= 32;
a0bbdb76	359	}
62ee4fed	360	++p;
62ee4fed	361	}
a0bbdb76	362	}
a0bbdb76	363
13dbdd6b	364	serial_port uart_open(const char* pcPortName) {
5bcc76c4	365	char acPortName[255];
5bcc76c4	366	serial_port_windows* sp = malloc(sizeof(serial_port_windows));
13dbdd6b	367
5bcc76c4	368	// Copy the input "com?" to "\\.\COM?" format
5bcc76c4	369	sprintf(acPortName,"\\\\.\\%s",pcPortName);
a0bbdb76	370	upcase(acPortName);
13dbdd6b	371
5bcc76c4	372	// Try to open the serial port
5bcc76c4	373	sp->hPort = CreateFileA(acPortName,GENERIC_READ\|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
62ee4fed	374	if (sp->hPort == INVALID_HANDLE_VALUE) {
5bcc76c4	375	uart_close(sp);
	376	return INVALID_SERIAL_PORT;
	377	}
13dbdd6b	378
5bcc76c4	379	// Prepare the device control
	380	memset(&sp->dcb, 0, sizeof(DCB));
	381	sp->dcb.DCBlength = sizeof(DCB);
0fcfad0e	382	if(!BuildCommDCBA("baud=115200 parity=N data=8 stop=1",&sp->dcb)) {
f62b5e12	383	uart_close(sp);
	384	return INVALID_SERIAL_PORT;
	385	}
13dbdd6b	386
5bcc76c4	387	// Update the active serial port
62ee4fed	388	if(!SetCommState(sp->hPort,&sp->dcb)) {
5bcc76c4	389	uart_close(sp);
	390	return INVALID_SERIAL_PORT;
	391	}
13dbdd6b	392
d1e197e9	393	sp->ct.ReadIntervalTimeout = 1;
d1e197e9	394	sp->ct.ReadTotalTimeoutMultiplier = 1;
5bcc76c4	395	sp->ct.ReadTotalTimeoutConstant = 30;
d1e197e9	396	sp->ct.WriteTotalTimeoutMultiplier = 1;
5bcc76c4	397	sp->ct.WriteTotalTimeoutConstant = 30;
13dbdd6b	398
62ee4fed	399	if(!SetCommTimeouts(sp->hPort,&sp->ct)) {
5bcc76c4	400	uart_close(sp);
	401	return INVALID_SERIAL_PORT;
	402	}
13dbdd6b	403
5bcc76c4	404	PurgeComm(sp->hPort, PURGE_RXABORT \| PURGE_RXCLEAR);
13dbdd6b	405
5bcc76c4	406	return sp;
	407	}
	408
13dbdd6b	409	void uart_close(const serial_port sp) {
5bcc76c4	410	CloseHandle(((serial_port_windows*)sp)->hPort);
	411	free(sp);
	412	}
	413
13dbdd6b	414	bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
5bcc76c4	415	serial_port_windows* spw;
5bcc76c4	416	spw = (serial_port_windows*)sp;
5bcc76c4	417	spw->dcb.BaudRate = uiPortSpeed;
13dbdd6b	418	return SetCommState(spw->hPort, &spw->dcb);
5bcc76c4	419	}
5bcc76c4	420
13dbdd6b	421	uint32_t uart_get_speed(const serial_port sp) {
5bcc76c4	422	const serial_port_windows* spw = (serial_port_windows*)sp;
13dbdd6b	423	if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
5bcc76c4	424	return spw->dcb.BaudRate;
13dbdd6b	425	}
5bcc76c4	426	return 0;
	427	}
	428
13dbdd6b	429	bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
5bcc76c4	430	ReadFile(((serial_port_windows)sp)->hPort,pbtRx,pszRxLen,(LPDWORD)pszRxLen,NULL);
	431	return (*pszRxLen != 0);
	432	}
	433
13dbdd6b	434	bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
5bcc76c4	435	DWORD dwTxLen = 0;
e772774b	436	return WriteFile(((serial_port_windows*)sp)->hPort, pbtTx, szTxLen, &dwTxLen, NULL);
5bcc76c4	437	return (dwTxLen != 0);
	438	}
	439
	440	#endif