main.cpp

00001 // example to test the TFT Display from Mikroelectronika
00002 
00003 #include "stdio.h"
00004 #include "mbed.h"
00005 #include "SPI_TFT_ILI9341.h"
00006 #include "string"
00007 #include "Arial12x12.h"
00008 #include "Arial24x23.h"
00009 #include "Arial28x28.h"
00010 #include "font_big.h"
00011 
00012 
00013 Serial pc (USBTX,USBRX);
00014 
00015 
00016 
00017 
00018 // the display has a backlight switch on board
00019 DigitalOut LCD_LED(PTA13);   // may not be needed on mikroelectronika board
00020 DigitalOut pwr(PTD7); // ditto
00021 
00022 // the TFT is connected to SPI pin 5-7
00023 //SPI_TFT_ILI9341 TFT(p5, p6, p7, p8, p9, p10,"TFT"); // mosi, miso, sclk, cs, reset, dc for lpc1768
00024 SPI_TFT_ILI9341 TFT(PTD2, PTD3, PTD1, PTD5, PTD0, PTA13,"TFT"); // mosi, miso, sclk, cs, reset, dc for frdmkl25z
00025 //NB better combination to use a coherent 2x4 block for lcd
00026 //   SPI_TFT_ILI9341 TFT(PTD2, PTD3, PTD1, PTA16, PTA17, PTC16,"TFT"); // mosi, miso, sclk, cs, reset, dc for frdmkl25z
00027 //   DigitalOut LCD_LED(PTC17);
00028 
00029 
00030 // Subroutine to read the x location of the touch point
00031 // need to set x+ to 3V and ground x- then read analogue voltage on ym
00032 //nb need to add a check for actual touch as opposed to random crap
00033 int readX()
00034 {
00035     AnalogIn yp(PTB2);
00036     AnalogIn ym(PTB3);
00037     DigitalOut xp(PTB0);
00038     DigitalOut xm(PTB1);
00039 
00040     xp=1; // set positive sdie of x high
00041     xm=0;
00042     // dont need to do anyhting to set low side as it should be fine.
00043     // but do need to disconnect yp
00044     //yp.PinMode(PullNone)
00045     int xval=(int)ym.read_u16();  // get value
00046     return(xval);
00047 }
00048 // subroutine to read y values - has different pin functions ..
00049 int readY()
00050 {
00051     DigitalOut yp(PTB2);
00052     DigitalOut ym(PTB3);
00053     AnalogIn xp(PTB0);
00054     AnalogIn xm(PTB1);
00055 
00056     yp=1; // set positive sdie of x high
00057     ym=0;
00058     // dont need to do anyhting to set low side as it should be fine.
00059     // but do need to disconnect yp
00060     //yp.PinMode(PullNone)
00061     int yval=(int)xm.read_u16();  // get value
00062     return(yval);
00063 }
00064 
00065 
00066 
00067 int main()
00068 {
00069     pc.baud(115200);
00070 
00071     int xpos=0,ypos=0,xp=0,yp=0;
00072     pwr=1;
00073     wait(0.2);
00074 
00075     int i;
00076     LCD_LED = 1;            // backlight on
00077 
00078     TFT.claim(stdout);        // send stdout to the TFT display
00079     TFT.set_orientation(1);
00080     TFT.background(Black);    // set background to black
00081     TFT.foreground(White);    // set chars to white
00082     TFT.cls();                // clear the screen
00083 
00084     //first show the 4 directions
00085     TFT.set_orientation(0);
00086     TFT.background(Black);
00087     TFT.cls();
00088 
00089     TFT.set_font((unsigned char*) Arial12x12);
00090     TFT.locate(0,0);
00091     printf(" 0 Hello Mbed 0");
00092     TFT.set_orientation(1);
00093     TFT.locate(0,0);
00094     printf(" 1 Hello Mbed 1");
00095     TFT.set_orientation(2);
00096     TFT.locate(0,0);
00097     printf(" 2 Hello Mbed 2");
00098     TFT.set_orientation(3);
00099     TFT.locate(0,0);
00100     printf(" 3 Hello Mbed 3");
00101     TFT.set_orientation(3);
00102     TFT.set_font((unsigned char*) Arial24x23);
00103     TFT.locate(50,100);
00104     TFT.printf("TFT orientation 3");
00105     TFT.set_orientation(1);
00106     for(i=0; i<10; i++) {
00107         wait(1);        // wait one seconds
00108         TFT.locate(50,160);
00109         TFT.printf("count %d",i);
00110     }
00111     TFT.set_orientation(1);
00112     TFT.cls();
00113     //   LCD_LED = 1;
00114     TFT.circle(120,120,10,0xffff);
00115     while(1==1) {
00116 
00117         xpos=readX();
00118         ypos=readY();
00119         pc.printf("xpos=%d\t,\typo=%d",xpos,ypos);
00120         xp=(240*xpos)/60000;
00121         yp=(320*ypos)/60000;
00122         pc.printf("\txp=%d\t,\typo=%d\n\r",xp,yp);
00123         if(xp>5 && yp>5) TFT.circle(xp,yp,5,Yellow);
00124         wait(0.1);
00125 
00126     }
00127 
00128 }