main.cpp

00001 /**
00002  * main.cpp
00003  */
00004 #include "mbed.h"
00005 #include "ILI9341.h"
00006 #include "Arial28x28.h"
00007 #include "vt100.h"
00008 #include "meter.h"
00009 #include "main.h"
00010 
00011 #define ADC_MAX_VALUE 3.28
00012 
00013 vt100        *tty = 0 ;
00014 ILI9341      *tft = 0 ;
00015 meter        *tacho = 0 ;
00016 
00017 DigitalOut *backlight = 0 ;
00018 AnalogIn   *vin = 0 ;
00019 
00020 float min_value = 0.0 ;
00021 float max_value = 3.3 ;
00022 
00023 void initTFT(void)
00024 {
00025     //Configure the display driver
00026     tft->BusEnable(true) ;
00027     tft->FastWindow(true) ;
00028     tft->background(Black);
00029     tft->foreground(White);
00030     wait(0.01) ;
00031     tft->cls();
00032     tft->BusEnable(false) ;
00033     backlight = new DigitalOut(PIN_BL_TFT, 1) ;
00034 }
00035 
00036 void init_hardware(void)
00037 {
00038     tty = new vt100() ;
00039     tty->cls() ;
00040     tft = new ILI9341(SPI_8, 10000000, 
00041       PIN_MOSI, PIN_MISO,  PIN_SCLK, 
00042       PIN_CS_TFT, PIN_RESET_TFT, PIN_DC_TFT, "Adafruit2.8") ;
00043     initTFT() ;
00044     tft->set_font((unsigned char*) Arial28x28);
00045     tft->foreground(White) ;
00046     tacho = new meter(5, 5, 230, 230, 0.0, 3.3) ;
00047     vin = new AnalogIn(PIN_ADC_CH0) ;
00048     *backlight = 1 ;
00049 }
00050 
00051 double getRoundedValue(void)
00052 {
00053     double value = 0.0 ;
00054     int intvalue = 0 ;
00055     value = ADC_MAX_VALUE * vin->read() ;
00056     intvalue = (int)(1000.0 * value + 0.5) ;
00057     value = (double)intvalue / 1000.0 ;
00058     return( value ) ;
00059 }
00060 
00061 int main() {
00062     float value = 0.0 ;
00063     float prev_value = 0.0 ;
00064  
00065     init_hardware() ;
00066     tacho->draw(value) ;
00067     
00068     while(1) {
00069         value = getRoundedValue() ;
00070         printf("%.2f\n", value) ;
00071         if (value != prev_value) {
00072             tacho->update(value) ;
00073             prev_value = value ;
00074         }
00075         wait(0.1) ;
00076     }
00077 }