csu3_am335x/EVSE/GPL/plc-utils.LNX.2.1.20/source/serial/weeder.c

/*====================================================================*
*
*   Copyright (c) 2013 Qualcomm Atheros, Inc.
*
*   All rights reserved.
*
*====================================================================*/

/*====================================================================*
 *
 *   weeder.c - Weeder Solid State Relay Module Controller;
 *
 *   Contributor(s):
 *	Charles Maier <cmaier@qca.qualcomm.com>
 *	Nathaniel Houghton <nhoughto@qca.qualcomm.com>
 *	Mathieu Olivari <mathieu@qca.qualcomm.com>
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *   system header files;
 *--------------------------------------------------------------------*/

#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#if defined (__linux__)
#	include <termios.h>
#elif defined (__APPLE__)
#	include <termios.h>
#elif defined (__OpenBSD__)
#	include <termios.h>
#elif defined (WIN32)
#	include <windows.h>
#else
#error "Unknown Environment"
#endif

/*====================================================================*
 *   custom header files;
 *--------------------------------------------------------------------*/

#include "../tools/getoptv.h"
#include "../tools/putoptv.h"
#include "../tools/version.h"
#include "../tools/number.h"
#include "../tools/symbol.h"
#include "../tools/timer.h"
#include "../tools/files.h"
#include "../tools/flags.h"
#include "../tools/error.h"

/*====================================================================*
 *   custom source files;
 *--------------------------------------------------------------------*/

#ifndef MAKEFILE
#include "../tools/getoptv.c"
#include "../tools/putoptv.c"
#include "../tools/version.c"
#include "../tools/uintspec.c"
#include "../tools/synonym.c"
#include "../tools/todigit.c"
#include "../tools/error.c"
#endif

/*====================================================================*
 *   program constants;
 *--------------------------------------------------------------------*/

#define WEEDER_UNITS "BA"
#define WEEDER_LEDS 5
#define WEEDER_BITS 7
#define WEEDER_WAIT 25 
#define WEEDER_ECHO 0
#define WEEDER_MODE 1

#define WEEDER_BUFFER_LENGTH 10
#define WEEDER_STRING_LENGTH 15

#ifdef WIN32
#	define WEEDER_PORT "com1:"
#else
#	define WEEDER_PORT "/dev/ttyS0"
#endif

#define WEEDER_SILENCE (1 << 0)
#define WEEDER_VERBOSE (1 << 1)
#define WEEDER_DISPLAY (1 << 2)
#define WEEDER_NEWLINE (1 << 2)

/*====================================================================*
 *   program variables;
 *--------------------------------------------------------------------*/

static struct _term_ const modes [] = 

{ 
	{ 
		"off", 
		"0"
	}, 
	{ 
		"on", 
		"1"
	} 
}; 

static char buffer [WEEDER_BUFFER_LENGTH]; 
static char string [WEEDER_STRING_LENGTH]; 
static signed length = 0; 
static signed offset = 0; 

/*====================================================================*
 *
 *   void function1 (struct _file_ * port, char const * units, unsigned wait, unsigned echo);
 *
 *   send echo command to Weeder Solid State Relay modules B then A;
 *   Standard Atheros relay modules were wired in reverse order for 
 *   some reason;
 *
 *--------------------------------------------------------------------*/

static void function1 (struct _file_ * port, char const * units, unsigned wait, unsigned echo) 

{ 
	extern char buffer []; 
	extern signed length; 
	while (* units) 
	{ 
		length = 0; 
		buffer [length++] = * units++; 
		buffer [length++] = 'X'; 
		buffer [length++] = '0' +  (echo & 1); 
		buffer [length++] = '\r'; 
		if (write (port->file, buffer, length) != length) 
		{ 
			error (1, errno, FILE_CANTSAVE, port->name); 
		} 
		SLEEP (wait); 
	} 
	return; 
} 

/*====================================================================*
 *
 *   void function2 (struct _file_ * port, char const * units, unsigned wait, unsigned mode, unsigned data);
 *
 *   send write command to Weeder Solid State Relay modules B then A
 *   because Qualcomm Atheros relay modules are wired in reverse order 
 *   for some reason;
 *
 *--------------------------------------------------------------------*/

static void function2 (struct _file_ * port, char const * units, unsigned wait, unsigned mode, unsigned data) 

{ 
	extern char buffer [WEEDER_BUFFER_LENGTH]; 
	extern signed length; 
	length = 0; 
	buffer [length++] = * units++; 
	buffer [length++] = 'W'; 
	buffer [length++] = '0' +  (mode & 1); 
	buffer [length++] = '0'; 
	buffer [length++] = '0'; 
	while (length < WEEDER_BITS) 
	{ 
		buffer [length++] = '0' +  (data & 1); 
		data >>= 1; 
	} 
	buffer [length++] = '\r'; 
	if (write (port->file, buffer, length) != length) 
	{ 
		error (1, errno, FILE_CANTSAVE, port->name); 
	} 
	SLEEP (wait); 
	length = 0; 
	buffer [length++] = * units++; 
	buffer [length++] = 'W'; 
	while (length < WEEDER_BITS) 
	{ 
		buffer [length++] = '0' +  (data & 1); 
		data >>= 1; 
	} 
	buffer [length++] = '\r'; 
	if (write (port->file, buffer, length) != length) 
	{ 
		error (1, errno, FILE_CANTSAVE, port->name); 
	} 
	SLEEP (wait); 
	return; 
} 

/*====================================================================*
 *
 *   void function3 (struct _file_ * port, char const * units, unsigned wait);
 *
 *   read weeder solid state controller and display settings on the
 *   console as attenuation;
 *
 *--------------------------------------------------------------------*/

static void function3 (struct _file_ * port, char const * units, unsigned wait) 

{ 
	extern char buffer [WEEDER_BUFFER_LENGTH]; 
	extern char string [WEEDER_STRING_LENGTH]; 
	extern signed length; 
	extern signed offset; 
	unsigned number = 0; 
	memset (string, 0, sizeof (string)); 
	for (offset = 0; * units; offset += WEEDER_LEDS) 
	{ 
		length = 0; 
		buffer [length++] = * units++; 
		buffer [length++] = 'R'; 
		buffer [length++] = '\r'; 
		if (write (port->file, buffer, length) != length) 
		{ 
			error (1, errno, FILE_CANTSAVE, port->name); 
		} 
		SLEEP (wait); 
		memset (buffer, 0, sizeof (buffer)); 
		if (read (port->file, buffer, WEEDER_LEDS +  2) == - 1) 
		{ 
			error (1, errno, FILE_CANTREAD, port->name); 
		} 
		SLEEP (wait); 
		memcpy (& string [offset], & buffer [1], WEEDER_LEDS); 
	} 
	while (offset-- > 3) 
	{ 
		number <<= 1; 
		number |= string [offset] - '0'; 
	} 
	printf ("%d\n", number); 
	return; 
} 

/*====================================================================*
 *
 *   int main (int argc, char const * argv []);
 *
 *--------------------------------------------------------------------*/

int main (int argc, char const * argv []) 

{ 
	static char const * optv [] = 
	{ 
		"e:m:o:p:iqrvw:", 
		"", 
		"Weeder Solid State Relay Module Controller", 
		"e n\techo is (n) [" LITERAL (WEEDER_ECHO) "]", 
		"m n\tmode is (n) [" LITERAL (WEEDER_MODE) "]", 
		"o s\tunit order is (s) [" WEEDER_UNITS "]", 
		"p f\tport is (f) [" WEEDER_PORT "]", 
		"q\tquiet mode", 
		"r\tread attenuator value", 
		"v\tverbose mode", 
		"w n\twait (n) millseconds [" LITERAL (WEEDER_WAIT) "]", 
		(char const *) (0)
	}; 
	struct _file_ port = 
	{ 
		- 1, 
		WEEDER_PORT
	}; 

#if defined (WIN32)

	HANDLE hSerial; 
	DCB dcbSerial = 
	{ 
		0
	}; 

#else

	struct termios termios; 

#endif

	char const * units = WEEDER_UNITS; 
	unsigned wait = WEEDER_WAIT; 
	unsigned echo = WEEDER_ECHO; 
	unsigned mode = WEEDER_MODE; 
	unsigned data = 0; 
	flag_t flags = (flag_t) (0); 
	signed c; 
	optind = 1; 
	if (getenv ("WEEDER")) 
	{ 
		port.name = strdup (getenv ("WEEDER")); 
	} 
	while (~ (c = getoptv (argc, argv, optv))) 
	{ 
		switch (c) 
		{ 
		case 'e': 
			echo = (unsigned) (uintspec (synonym (optarg, modes, SIZEOF (modes)), 0, 1)); 
			break; 
		case 'm': 
			mode = (unsigned) (uintspec (synonym (optarg, modes, SIZEOF (modes)), 0, 1)); 
			break; 
		case 'n': 
			_setbits (flags, WEEDER_NEWLINE); 
			break; 
		case 'o': 
			units = optarg; 
			break; 
		case 'p': 
			port.name = optarg; 
			break; 
		case 'w': 
			wait = (unsigned) (uintspec (optarg, 5, 100)); 
			break; 
		case 'q': 
			_setbits (flags, WEEDER_SILENCE); 
			break; 
		case 'r': 
			_setbits (flags, WEEDER_DISPLAY); 
			break; 
		case 'v': 
			_setbits (flags, WEEDER_VERBOSE); 
			break; 
		default: 
			break; 
		} 
	} 
	argc -= optind; 
	argv += optind; 
	if ((argc) && (* argv)) 
	{ 
		data = (unsigned) (uintspec (* argv, 0, 0x7F)); 
	} 

#if defined (WIN32)

	hSerial = CreateFile (port.name, GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); 
	if (hSerial == INVALID_HANDLE_VALUE) 
	{ 
		error (1, errno, FILE_CANTOPEN, port.name); 
	} 
	dcbSerial.DCBlength = sizeof (dcbSerial); 
	if (! GetCommState (hSerial, & dcbSerial)) 
	{ 
		error (1, 0, FILE_CANTREAD " state", port.name); 
	} 
	dcbSerial.BaudRate = CBR_9600; 
	dcbSerial.ByteSize = 8; 
	dcbSerial.StopBits = ONESTOPBIT; 
	dcbSerial.Parity = NOPARITY; 
	if (! SetCommState (hSerial, & dcbSerial)) 
	{ 
		error (1, 0, FILE_CANTSAVE, port.name); 
	} 
	CloseHandle (hSerial); 
	if ((port.file = open (port.name, O_BINARY | O_RDWR)) == - 1) 
	{ 
		error (1, errno, FILE_CANTOPEN " state", port.name); 
	} 

#else

	if ((port.file = open (port.name, O_RDWR | O_NOCTTY | O_NDELAY)) == - 1) 
	{ 
		error (1, 0, FILE_CANTOPEN, port.name); 
	} 
	tcgetattr (port.file, & termios); 
	termios.c_cflag = CS8; 
	cfsetospeed (& termios, B9600); 
	tcsetattr (port.file, TCSANOW, & termios); 

#endif

	function1 (& port, units, wait, echo); 
	if ((argc) && (* argv)) 
	{ 
		function2 (& port, units, wait, mode, data); 
	} 
	if (_anyset (flags, WEEDER_DISPLAY)) 
	{ 
		function3 (& port, units, wait); 
	} 
	close (port.file); 
	exit (0); 
}