SX032QVGA008.h

00001 /* mbed library for aitendo SX032QVGA08 TFT module with resistive touch panel.
00002  * 
00003  * Original library is "SpeedStudioTFT" by 2014 Copyright (c) Seeed Technology Inc.
00004  * I made by it to the reference.
00005  *
00006  * (1) Because there was some mistake in the source, I was corrected.
00007  * (2) Also, I changed to the source you have to assume FRDM
00008  * (3) I changed BackLight is PWM controlled.
00009  */
00010 
00011 #ifndef SX032QVGA008_H
00012 #define SX032QVGA008_H
00013 
00014 #include "mbed.h"
00015 #include "SPI_TFT_ILI9341ext.h"
00016 #ifdef USE_SDCARD
00017 #include "SDFileSystem.h" // import the SDFileSystem library 
00018 #endif
00019 
00020 struct point {
00021     int x;
00022     int y;
00023 };
00024 
00025 class SX032QVGA008 : public  
00026 #ifdef USE_SDCARD
00027     SDFileSystem,
00028 #endif
00029     SPI_TFT_ILI9341ext
00030 {
00031 public:
00032     /** create a TFT with touch object connected to the pins:
00033      *
00034      * @param pin xp resistiv touch x+
00035      * @param pin xm resistiv touch x-
00036      * @param pin yp resistiv touch y+
00037      * @param pin ym resistiv touch y-
00038      * @param mosi,miso,sclk SPI connection to TFT
00039      * @param cs pin connected to CS of display
00040      * @param rs pin connected to RS(DC) of display
00041      * @param reset pin connected to RESET of display
00042      * @param backlight pin connected to bkl of display 
00043      *  ( You must drive N-MOSFET.pin is connected to NMOS gate terminal.)
00044      * @param sdcard_cs pin connected to CS of sdcard
00045      * based on my SPI_TFT lib
00046      */
00047     SX032QVGA008(PinName xp, PinName xm, PinName yp, PinName ym,
00048                      PinName mosi, PinName miso, PinName sclk,
00049                      PinName csTft, PinName dcTft, PinName resTft, PinName blTft,
00050                      PinName csSd);
00051 
00052     /** Backlight PWM controll
00053      *
00054      * @param duty is PWM duty (0 - 1.0)
00055      * period is 0.01 fixed.
00056      */
00057     void setBacklight(float duty);
00058     
00059     /** calibrate the touch display
00060      *
00061      * User is asked to touch on two points on the screen
00062      */
00063     void calibrate(void);
00064 
00065     /** read x and y coord on screen
00066      *
00067      * @returns point(x,y)
00068      */
00069     bool
00070     getPixel(point& p);
00071 
00072     /** calculate coord on screen
00073     *
00074     * @param a_point point(analog x, analog y)
00075     * @returns point(pixel x, pixel y)
00076     *
00077     */
00078     point toPixel(point p);
00079 
00080 protected:
00081     PinName _xm;
00082     PinName _ym;
00083     PinName _xp;
00084     PinName _yp;
00085     PwmOut bl;
00086 
00087     typedef enum { YES, MAYBE, NO } TOUCH;
00088     TOUCH getTouch(point& p);
00089     int readTouch(PinName p, PinName m, PinName a, PinName i);
00090 
00091     int x_off,y_off;
00092     int pp_tx,pp_ty;
00093 };
00094 
00095 #endif