lcd_helper.cpp

00001 /**
00002  * Mostly just a wrapper around the LCD display.
00003  *
00004  * Author: Jacob Baungard Hansen
00005  */
00006 
00007 #include "lcd_helper.h"
00008 
00009 /**
00010  * Constructor setups the LCD Display
00011  * and writes initial values needed for this project.
00012  */
00013 LCDHelper::LCDHelper() {
00014 
00015   this->par_port = new MCP23017(p9, p10, 0x40); // initialise 16-bit I/O chip
00016   this->lcd = new WattBob_TextLCD(par_port); // initialise 2*26 char display 
00017   par_port->write_bit(1,BL_BIT); // turn LCD backlight ON 
00018   
00019     lcd->cls(); // clear display
00020     
00021     this->print("Fr     d1   d2  ", "a1   a2   e  ");
00022 
00023 }
00024 
00025 LCDHelper::~LCDHelper() {
00026     delete this->par_port;
00027     delete this->lcd;
00028 }
00029 
00030 /**
00031  * Clears the display and prints one line
00032  */
00033 void LCDHelper::print(std::string line1) {
00034     this->print(line1, std::string());
00035 }
00036 
00037 /**
00038  * Clears the display and prints two lines
00039  */
00040 void LCDHelper::print(std::string line1, std::string line2) {
00041     lcd->cls(); // clear display
00042     
00043   lcd->locate(0,0); // set cursor to location (0,0) - top left corner
00044   lcd->printf(line1.c_str()); 
00045     
00046     // only print line2 if it contains data
00047     if (!line2.empty()) {
00048     lcd->locate(1,0); // set cursor to location (1,0) - bottom left corner
00049     lcd->printf(line2.c_str()); 
00050     }
00051 }
00052 
00053 void LCDHelper::clear() {
00054     lcd->cls(); // clear display
00055 }
00056 
00057 /**
00058  *
00059  *
00060  * @Param   state       pointer to state object
00061  */
00062 void LCDHelper::print_state(State * state) {
00063     lcd->locate(0,3);
00064     lcd->printf("%d", state->get_freq());
00065     
00066     lcd->locate(0,10);
00067     lcd->printf("%d", state->get_digital_1());
00068     
00069     lcd->locate(0,15);
00070     lcd->printf("%d", state->get_digital_2());
00071     
00072     lcd->locate(1,3);
00073     // printf is very slow at converting from float to int
00074     int avg_analog_1 = (int) floor( state->get_avg_analog_1() + 0.5);
00075     lcd->printf("%d", avg_analog_1);
00076         
00077     lcd->locate(1,8);
00078     // printf is very slow at converting from float to int
00079     int avg_analog_2 = (int) floor( state->get_avg_analog_2() + 0.5);
00080   lcd->printf("%d", avg_analog_2);
00081     
00082     lcd->locate(1,12);
00083     lcd->printf("%d", state->get_error() );
00084     
00085 }