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LaosDisplay.cpp
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LaosDisplay.cpp
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/**
* LaosDisplay.cpp
* User interface class, for
* => 2x16 display and keypad
* => serial connection
*
* Copyright (c) 2011 Peter Brier and Jaap Vermaas
*
* This file is part of the LaOS project (see: http://wiki.laoslaser.org/)
*
* LaOS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* LaOS is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LaOS. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "LaosDisplay.h"
#include "mbed.h"
// Serial
#if !MRI_ENABLE
Serial serial(USBTX, USBRX);
#define _SERIAL_BAUD 115200
#endif
// I2C
I2C i2c(p9, p10); // sda, scl
#define _I2C_ADDRESS 0x04
#define _I2C_HOME 0xFE
#define _I2C_CLS 0xFF
#define _I2C_BAUD 9600
// Make new config file object
LaosDisplay::LaosDisplay()
{
int i2cBaud = _I2C_BAUD;
i2c.frequency(i2cBaud );
#if !MRI_ENABLE
int serialBaud = _SERIAL_BAUD;
serial.baud(serialBaud);
#endif
char key;
// test I2C, if we cannot read, display is not attached, enable simulation
// wait 1 second to make sure that I2C has time to power on!
wait(3);
sim = i2c.read(_I2C_ADDRESS ,&key, 1) != 0;
if (sim) {
printf("LaosDisplay()\n");
printf("Display() Simulation=ON, I2C Baudrate=%d\n", i2cBaud );
}
}
// Test I2C again when config file is read
void LaosDisplay::testI2C() {
char key;
sim = i2c.read(_I2C_ADDRESS ,&key, 1) != 0;
if (sim) mbed_reset();
}
// Write string
void LaosDisplay::write(char *s)
{
if ( sim )
{
while (*s)
#if !MRI_ENABLE
serial.putc(*s++);
#else
putc(*s++, stdout);
#endif
return;
} else {
while (*s)
i2c.write(_I2C_ADDRESS, s++, 1);
}
}
// Clear screen
void LaosDisplay::cls()
{
char s[2];
s[0] = _I2C_HOME;
s[1] = 0;
write(s);
}
// Read Key
int LaosDisplay::read()
{
char key = 0;
if (sim)
{
#if !MRI_ENABLE
if ( serial.readable() )
key = serial.getc();
else
#endif
key = 0;
}
else
i2c.read(_I2C_ADDRESS ,&key, 1);
if ((key < '1') || (key > '9'))
key = 0;
return key;
}
/**
*** Screens are defined with:
*** name, line[2], int* i[4], char *s;
***
*** in the lines, the following replacements are made:
*** $$$$$$ : "$" chars are replaced with the string argument for this screen (left alligned), if argument is NULL, spaces are inserted
*** +9876543210: "+" and numbers are replaced with decimal digits from the integer arguments (the "+" sign is replaced with '-' if the argument is negative
***
***
**/
inline char digit(int i, int n)
{
int d=1;
char c;
if ( i<0 ) i *= -1;
while(n--) d *= 10;
c = '0' + ((i/d) % 10);
return c;
}
void LaosDisplay::ShowScreen(const char *l, int *arg, char *s)
{
char c, next=0,surpress=1;
char str[128],*p;
p = str;
*p++ = _I2C_HOME;
while ( *l )
{
c=*l;
switch ( c )
{
case '$':
if (s != NULL && *s)
c = *s++;
else
c = ' ';
break;
case '+':
if (arg != NULL && *arg < 0)
c = '-';
else
c = '+';
break;
case '0': next=1; surpress=0;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
char d = ' ';
if (arg != NULL )
{
d = digit(*arg, *l-'0');
if ( d == '0' && surpress ) // supress leading zeros
d = ' ';
else
surpress = 0;
if ( next && arg != NULL ) // take next numeric argument
{
arg++;
next=0;
surpress=1;
}
}
c = d;
break;
}
*p++ = c;
l++;
}
*p=0;
write(str);
}
// EOF