LCM Module:LCM KeyPad under Linux

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Contents

The Sample code source you can download from

Source file: LCM_Keypad_SDK_v1.0L_Src

About source code.

1.We suggest using Code::Blocks as an IDE in Linux.

2.Or you can just use "make" to compile the source code in the LCMctlv22LSrc/ folder or LCMctlv22LSrc/src/ folder.
  And you can excute "lcmctlv22l" file in the LCMctlv22LSrc/src/ folder
 
 $cd LCM_Keypad_SDK_v1.0L_src
 $./configure
 $cd src
 $make
 $./lcm_keypad_sdk_v1.0L

Binary file: lcm_keypad_sdk_v1.0L_Bin

KeyPad Define

Image:KeyPad.jpg

key    recrived value
---------------------
key1       50
key2       52
key3       53
key4       55
key5       65
key6       67

How to use the DEMO application

Image:lcm_keypad_ap.jpg

  1. COM Port selection
  2. Setting the text which you want to print to LCM from key1~key6
  3. Setting that print the text to upline or lowline by check the checkbox
  4. After setting , click OK
  5. Press the key on the keypad , the text you set will print to LCM

Sample code Introduction

flow chart

Image:lcm_keypad_flowchart.jpg

Set for /dev/tty

char *get_ptty(pportinfo_t pportinfo)
{
	char *ptty;

	switch(pportinfo->tty){
		case '0':{
			ptty = TTY_DEV"0";
		}break;
		case '1':{
			ptty = TTY_DEV"1";
		}break;
		case '2':{
			ptty = TTY_DEV"2";
		}break;
		case '3':{
			ptty = TTY_DEV"3";
		}break;
		case '4':{
			ptty = TTY_DEV"4";
		}break;
		case '5':{
			ptty = TTY_DEV"5";
		}break;
	}
	return(ptty);
} 

Setup COM

int PortSet(int fdcom, const pportinfo_t pportinfo)
{ 
	struct termios termios_old, termios_new;
	int 	tmp;
	char	databit, stopbit, parity, fctl;

	bzero(&termios_old, sizeof(termios_old));
	bzero(&termios_new, sizeof(termios_new));
	cfmakeraw(&termios_new);
	tcgetattr(fdcom, &termios_old);	 //get the serial port attributions
	cfsetispeed(&termios_new, baudrate);
	cfsetospeed(&termios_new, baudrate);
	termios_new.c_cflag |= CLOCAL;
	termios_new.c_cflag |= CREAD;
	termios_new.c_cflag &= ~CRTSCTS;
	termios_new.c_cflag &= ~CSIZE;
	termios_new.c_cflag |= CS8;
	termios_new.c_cflag &= ~PARENB;
	termios_new.c_cflag &= ~CSTOPB;	//1 stop bits
	termios_new.c_oflag &= ~OPOST;
	termios_new.c_cc[VMIN]  = 1;
	termios_new.c_cc[VTIME] = 1;

	tcflush(fdcom, TCIFLUSH);
	tmp = tcsetattr(fdcom, TCSANOW, &termios_new); 
	return(tmp);
} 

Open serial port

int PortOpen(pportinfo_t pportinfo)
{
	int fdcom;
	char *ptty;

	ptty = get_ptty(pportinfo);
	fdcom = open(ptty, O_RDWR | O_NOCTTY | O_NONBLOCK);

	return (fdcom);
} 

Close serial port

void PortClose(int fdcom)
{
	close(fdcom);
} 

send data

int PortSend(int fdcom, char *data, int datalen)
{
	int len = 0;

	len = write(fdcom, data, datalen);
	if(len == datalen){
		return (len);
	}
	else{
		tcflush(fdcom, TCOFLUSH);
		return -1;
	}
} 

receive data

int PortRecv(int fdcom, char *data, int datalen)
{
	int readlen, fs_sel = 0;
	fd_set	fs_read;
	struct timeval tv_timeout;

	FD_ZERO(&fs_read);
	FD_SET(fdcom, &fs_read);
	tv_timeout.tv_sec = TIMEOUT_SEC(datalen, baudrate);
	tv_timeout.tv_usec = TIMEOUT_USEC;

	fs_sel = select(fdcom+1, &fs_read, NULL, NULL, &tv_timeout);
	if(fs_sel){
		readlen = read(fdcom, data, datalen);
		return(readlen);
	}
	else{
		return(-1);
	}
	return (readlen);
} 

Set COM Port Device(COM1~COM6)

portinfo_t portinfo ={ '0' , '0' };
portinfo_t portinfo ={ '0' , '1' };
portinfo_t portinfo ={ '0' , '2' };
portinfo_t portinfo ={ '0' , '3' };
portinfo_t portinfo ={ '0' , '4' };
portinfo_t portinfo ={ '0' , '5' };
//Default tty:COM2

Use thread to receive the value of key

 	if( counter == 1 )
	{
		g_thread_create(signal_thread, NULL, TRUE, NULL);
	}

	counter++;

receive the data from keypad in thread

	for(;;)
	{
		PortRecv(fdcom, RecvBuf, 10);  //the received data:RevBuf[0]
		if ( RecvBuf[0] == 50)         //received data:key 1
		{
		}
		if ( RecvBuf[0] == 52)         //received data:key 2
		{
		}
		if ( RecvBuf[0] == 53)         //received data:key 3
		{
		}
		if ( RecvBuf[0] == 55)         //received data:key 4
		{
		}
		if ( RecvBuf[0] == 65)         //received data:key 5
		{
		}
		if ( RecvBuf[0] == 67)         //received data:key 6
		{
		}
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