[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();
  fcntl(spu->fd, F_SETLK, &fl);
  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) {
      return false;
    }
    
    // Write time-out
    if (res == 0) {
      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) 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=9600 data=8 parity=N 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         = 0;
  sp->ct.ReadTotalTimeoutMultiplier  = 0;
  sp->ct.ReadTotalTimeoutConstant    = 30;
  sp->ct.WriteTotalTimeoutMultiplier = 0;
  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
ca4714cd	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();
	122	fcntl(spu->fd, F_SETLK, &fl);
	123	close(spu->fd);
	124	free(sp);
	125	}
	126
13dbdd6b	127	bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
5bcc76c4	128	const serial_port_unix* spu = (serial_port_unix*)sp;
62ee4fed	129	speed_t stPortSpeed;
	130	switch (uiPortSpeed) {
	131	case 0: stPortSpeed = B0; break;
	132	case 50: stPortSpeed = B50; break;
	133	case 75: stPortSpeed = B75; break;
	134	case 110: stPortSpeed = B110; break;
	135	case 134: stPortSpeed = B134; break;
	136	case 150: stPortSpeed = B150; break;
	137	case 300: stPortSpeed = B300; break;
	138	case 600: stPortSpeed = B600; break;
	139	case 1200: stPortSpeed = B1200; break;
	140	case 1800: stPortSpeed = B1800; break;
	141	case 2400: stPortSpeed = B2400; break;
	142	case 4800: stPortSpeed = B4800; break;
	143	case 9600: stPortSpeed = B9600; break;
	144	case 19200: stPortSpeed = B19200; break;
	145	case 38400: stPortSpeed = B38400; break;
	146	# ifdef B57600
	147	case 57600: stPortSpeed = B57600; break;
	148	# endif
	149	# ifdef B115200
	150	case 115200: stPortSpeed = B115200; break;
	151	# endif
	152	# ifdef B230400
	153	case 230400: stPortSpeed = B230400; break;
	154	# endif
	155	# ifdef B460800
	156	case 460800: stPortSpeed = B460800; break;
	157	# endif
	158	# ifdef B921600
	159	case 921600: stPortSpeed = B921600; break;
	160	# endif
	161	default: return false;
	162	};
	163	struct termios ti;
	164	if (tcgetattr(spu->fd,&ti) == -1) return false;
	165	// Set port speed (Input and Output)
	166	cfsetispeed(&ti,stPortSpeed);
	167	cfsetospeed(&ti,stPortSpeed);
	168	return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
5bcc76c4	169	}
5bcc76c4	170
13dbdd6b	171	uint32_t uart_get_speed(const serial_port sp) {
62ee4fed	172	struct termios ti;
62ee4fed	173	uint32_t uiPortSpeed;
5bcc76c4	174	const serial_port_unix* spu = (serial_port_unix*)sp;
62ee4fed	175	if (tcgetattr(spu->fd,&ti) == -1) return 0;
	176	// Set port speed (Input)
	177	speed_t stPortSpeed = cfgetispeed(&ti);
	178	switch (stPortSpeed) {
	179	case B0: uiPortSpeed = 0; break;
	180	case B50: uiPortSpeed = 50; break;
	181	case B75: uiPortSpeed = 75; break;
	182	case B110: uiPortSpeed = 110; break;
	183	case B134: uiPortSpeed = 134; break;
	184	case B150: uiPortSpeed = 150; break;
	185	case B300: uiPortSpeed = 300; break;
	186	case B600: uiPortSpeed = 600; break;
	187	case B1200: uiPortSpeed = 1200; break;
	188	case B1800: uiPortSpeed = 1800; break;
	189	case B2400: uiPortSpeed = 2400; break;
	190	case B4800: uiPortSpeed = 4800; break;
	191	case B9600: uiPortSpeed = 9600; break;
	192	case B19200: uiPortSpeed = 19200; break;
	193	case B38400: uiPortSpeed = 38400; break;
	194	# ifdef B57600
	195	case B57600: uiPortSpeed = 57600; break;
	196	# endif
	197	# ifdef B115200
	198	case B115200: uiPortSpeed = 115200; break;
	199	# endif
	200	# ifdef B230400
	201	case B230400: uiPortSpeed = 230400; break;
	202	# endif
	203	# ifdef B460800
	204	case B460800: uiPortSpeed = 460800; break;
	205	# endif
	206	# ifdef B921600
	207	case B921600: uiPortSpeed = 921600; break;
	208	# endif
	209	default: return 0;
	210	};
5bcc76c4	211	return uiPortSpeed;
	212	}
	213
62ee4fed	214	bool uart_set_parity(serial_port sp, serial_port_parity spp) {
	215	struct termios ti;
	216	const serial_port_unix* spu = (serial_port_unix*)sp;
	217	if (tcgetattr(spu->fd,&ti) == -1) return false;
	218	switch(spp) {
	219	case SP_INVALID: return false;
	220	case SP_NONE: ti.c_cflag &= ~(PARENB \| PARODD); break;
	221	case SP_EVEN: ti.c_cflag \|= PARENB; ti.c_cflag &= ~(PARODD); break;
	222	case SP_ODD: ti.c_cflag \|= PARENB \| PARODD; break;
	223	}
	224	return (tcsetattr(spu->fd,TCSANOW,&ti) != -1);
	225	}
	226
	227	serial_port_parity uart_get_parity(const serial_port sp) {
	228	struct termios ti;
	229	const serial_port_unix* spu = (serial_port_unix*)sp;
	230	if (tcgetattr(spu->fd,&ti) == -1) return SP_INVALID;
	231
	232	if (ti.c_cflag & PARENB) {
	233	if (ti.c_cflag & PARODD) {
	234	return SP_ODD;
	235	} else {
	236	return SP_EVEN;
	237	}
	238	} else {
	239	return SP_NONE;
	240	}
5bcc76c4	241	}
5bcc76c4	242
13dbdd6b	243	bool uart_cts(const serial_port sp) {
5bcc76c4	244	char status;
	245	if (ioctl(((serial_port_unix*)sp)->fd,TIOCMGET,&status) < 0) return false;
	246	return (status & TIOCM_CTS);
	247	}
	248
13dbdd6b	249	bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
62ee4fed	250
5bcc76c4	251	int res;
	252	int byteCount;
	253	fd_set rfds;
	254	struct timeval tv;
13dbdd6b	255
13dbdd6b	256	// Reset the output count
5bcc76c4	257	*pszRxLen = 0;
13dbdd6b	258
5bcc76c4	259	do {
	260	// Reset file descriptor
	261	FD_ZERO(&rfds);
	262	FD_SET(((serial_port_unix*)sp)->fd,&rfds);
	263	tv = timeout;
	264	res = select(((serial_port_unix*)sp)->fd+1, &rfds, NULL, NULL, &tv);
13dbdd6b	265
5bcc76c4	266	// Read error
5bcc76c4	267	if (res < 0) {
5bcc76c4	268	return false;
5bcc76c4	269	}
babfcaa0	270
5bcc76c4	271	// Read time-out
	272	if (res == 0) {
	273	if (*pszRxLen == 0) {
	274	// Error, we received no data
5bcc76c4	275	return false;
	276	} else {
	277	// We received some data, but nothing more is available
	278	return true;
	279	}
	280	}
babfcaa0	281
5bcc76c4	282	// Retrieve the count of the incoming bytes
	283	res = ioctl(((serial_port_unix*)sp)->fd, FIONREAD, &byteCount);
	284	if (res < 0) return false;
babfcaa0	285
5bcc76c4	286	// There is something available, read the data
5bcc76c4	287	res = read(((serial_port_unix)sp)->fd,pbtRx+(pszRxLen),byteCount);
babfcaa0	288
5bcc76c4	289	// Stop if the OS has some troubles reading the data
5bcc76c4	290	if (res <= 0) return false;
babfcaa0	291
5bcc76c4	292	*pszRxLen += res;
babfcaa0	293
	294	if(res==byteCount)
	295	return true;
13dbdd6b	296
5bcc76c4	297	} while (byteCount);
babfcaa0	298
5bcc76c4	299	return true;
	300	}
	301
13dbdd6b	302	bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
5bcc76c4	303	int32_t res;
	304	size_t szPos = 0;
	305	fd_set rfds;
	306	struct timeval tv;
13dbdd6b	307
62ee4fed	308	while (szPos < szTxLen) {
5bcc76c4	309	// Reset file descriptor
	310	FD_ZERO(&rfds);
	311	FD_SET(((serial_port_unix*)sp)->fd,&rfds);
	312	tv = timeout;
	313	res = select(((serial_port_unix*)sp)->fd+1, NULL, &rfds, NULL, &tv);
13dbdd6b	314
5bcc76c4	315	// Write error
5bcc76c4	316	if (res < 0) {
5bcc76c4	317	return false;
5bcc76c4	318	}
13dbdd6b	319
5bcc76c4	320	// Write time-out
5bcc76c4	321	if (res == 0) {
5bcc76c4	322	return false;
5bcc76c4	323	}
13dbdd6b	324
5bcc76c4	325	// Send away the bytes
	326	res = write(((serial_port_unix*)sp)->fd,pbtTx+szPos,szTxLen-szPos);
	327
	328	// Stop if the OS has some troubles sending the data
	329	if (res <= 0) return false;
13dbdd6b	330
5bcc76c4	331	szPos += res;
	332	}
	333	return true;
	334	}
	335
	336	#else
	337	// The windows serial port implementation
	338
13dbdd6b	339	typedef struct {
5bcc76c4	340	HANDLE hPort; // Serial port handle
	341	DCB dcb; // Device control settings
	342	COMMTIMEOUTS ct; // Serial port time-out configuration
	343	} serial_port_windows;
	344
a0bbdb76	345	void upcase(char *p) {
62ee4fed	346	while(*p != '\0') {
	347	if(p >= 97 && p <= 122) {
	348	*p -= 32;
a0bbdb76	349	}
62ee4fed	350	++p;
62ee4fed	351	}
a0bbdb76	352	}
a0bbdb76	353
13dbdd6b	354	serial_port uart_open(const char* pcPortName) {
5bcc76c4	355	char acPortName[255];
5bcc76c4	356	serial_port_windows* sp = malloc(sizeof(serial_port_windows));
13dbdd6b	357
5bcc76c4	358	// Copy the input "com?" to "\\.\COM?" format
5bcc76c4	359	sprintf(acPortName,"\\\\.\\%s",pcPortName);
a0bbdb76	360	upcase(acPortName);
13dbdd6b	361
5bcc76c4	362	// Try to open the serial port
5bcc76c4	363	sp->hPort = CreateFileA(acPortName,GENERIC_READ\|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
62ee4fed	364	if (sp->hPort == INVALID_HANDLE_VALUE) {
5bcc76c4	365	uart_close(sp);
	366	return INVALID_SERIAL_PORT;
	367	}
13dbdd6b	368
5bcc76c4	369	// Prepare the device control
	370	memset(&sp->dcb, 0, sizeof(DCB));
	371	sp->dcb.DCBlength = sizeof(DCB);
62ee4fed	372	if(!BuildCommDCBA("baud=9600 data=8 parity=N stop=1",&sp->dcb)) {
5bcc76c4	373	uart_close(sp);
	374	return INVALID_SERIAL_PORT;
	375	}
13dbdd6b	376
5bcc76c4	377	// Update the active serial port
62ee4fed	378	if(!SetCommState(sp->hPort,&sp->dcb)) {
5bcc76c4	379	uart_close(sp);
	380	return INVALID_SERIAL_PORT;
	381	}
13dbdd6b	382
5bcc76c4	383	sp->ct.ReadIntervalTimeout = 0;
	384	sp->ct.ReadTotalTimeoutMultiplier = 0;
	385	sp->ct.ReadTotalTimeoutConstant = 30;
	386	sp->ct.WriteTotalTimeoutMultiplier = 0;
	387	sp->ct.WriteTotalTimeoutConstant = 30;
13dbdd6b	388
62ee4fed	389	if(!SetCommTimeouts(sp->hPort,&sp->ct)) {
5bcc76c4	390	uart_close(sp);
	391	return INVALID_SERIAL_PORT;
	392	}
13dbdd6b	393
5bcc76c4	394	PurgeComm(sp->hPort, PURGE_RXABORT \| PURGE_RXCLEAR);
13dbdd6b	395
5bcc76c4	396	return sp;
	397	}
	398
13dbdd6b	399	void uart_close(const serial_port sp) {
5bcc76c4	400	CloseHandle(((serial_port_windows*)sp)->hPort);
	401	free(sp);
	402	}
	403
13dbdd6b	404	bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed) {
5bcc76c4	405	serial_port_windows* spw;
5bcc76c4	406	spw = (serial_port_windows*)sp;
5bcc76c4	407	spw->dcb.BaudRate = uiPortSpeed;
13dbdd6b	408	return SetCommState(spw->hPort, &spw->dcb);
5bcc76c4	409	}
5bcc76c4	410
13dbdd6b	411	uint32_t uart_get_speed(const serial_port sp) {
5bcc76c4	412	const serial_port_windows* spw = (serial_port_windows*)sp;
13dbdd6b	413	if (!GetCommState(spw->hPort, (serial_port)&spw->dcb)) {
5bcc76c4	414	return spw->dcb.BaudRate;
13dbdd6b	415	}
5bcc76c4	416	return 0;
	417	}
	418
13dbdd6b	419	bool uart_receive(const serial_port sp, byte_t* pbtRx, size_t* pszRxLen) {
5bcc76c4	420	ReadFile(((serial_port_windows)sp)->hPort,pbtRx,pszRxLen,(LPDWORD)pszRxLen,NULL);
	421	return (*pszRxLen != 0);
	422	}
	423
13dbdd6b	424	bool uart_send(const serial_port sp, const byte_t* pbtTx, const size_t szTxLen) {
5bcc76c4	425	DWORD dwTxLen = 0;
	426	return WriteFile(((serial_port_windows*)sp)->hPort,pbtTx,szTxLen,&dwTxLen,NULL);
	427	return (dwTxLen != 0);
	428	}
	429
	430	#endif