Duncan McIntyre
A simple program to be used to calibrate the TouchScreen library
Dependencies: TouchScreen UniGraphic mbed-rtos mbed
Revision 0:0df0b8e0dc55, committed 2016-03-19
- Comitter:
- duncanFrance
- Date:
- Sat Mar 19 15:42:31 2016 +0000
- Commit message:
- Initial import
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TouchScreen.lib Sat Mar 19 15:42:31 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/duncanFrance/code/TouchScreen/#3f0160100cc9
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/UniGraphic.lib Sat Mar 19 15:42:31 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/duncanFrance/code/UniGraphic/#4d15eb940be7
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sat Mar 19 15:42:31 2016 +0000
@@ -0,0 +1,136 @@
+#include "mbed.h"
+#include "rtos.h"
+
+#include "Arial12x12.h"
+#include "Arial24x23.h"
+#include "ILI932x.h"
+#include "TouchScreen.h"
+
+
+#define LCD_X_RES 240
+#define LCD_Y_RES 320
+
+#define LCD_CS PH_0
+#define LCD_RESET PH_1
+#define LCD_RS PA_0
+#define LCD_WR PA_1
+#define LCD_RD PA_4
+
+
+#define T_CLK PC_10
+#define T_DIN PC_12
+#define T_DOUT PC_11
+#define T_CS PC_8
+#define T_IRQ PB_9
+
+/**
+* My touch screen lies at a slight angle and hides some of the screen
+* Adjust this value as needed until the calibration dots are visible on your screen
+**/
+#define CAL_OFFSET 4
+
+/**
+* hand-crafted values for the touch-screen calibration
+**/
+#define TOUCH_X_MIN 540
+#define TOUCH_X_MAX 3700
+#define TOUCH_Y_MIN 340
+#define TOUCH_Y_MAX 3656
+
+unsigned short backgroundcolor=Black;
+unsigned short foregroundcolor=White;
+
+ILI932x* mySCREEN;
+TouchScreen* touchScreen;
+Serial *pc;
+
+volatile bool done;
+volatile int xt, yt;
+volatile int xmin = 9999;
+volatile int xmax = 0;
+volatile int ymin = 9999;
+volatile int ymax = 0;
+
+
+void touchStart(TouchPosition p) {
+ mySCREEN->fillcircle(p.screenX, p.screenY, 10, Blue) ;
+}
+
+void touchMove(TouchPosition p) {
+ mySCREEN->fillcircle(p.screenX+10, p.screenY, 10, Green) ;
+}
+
+void touchEnd(TouchPosition p) {
+ mySCREEN->fillcircle(p.screenX+20, p.screenY, 10, Red) ;
+ done = true;
+ xt = p.x;
+ yt = p.y;
+}
+
+void cal(int x, int y) {
+ done = false;
+ mySCREEN->fillcircle(x, y, 4, Red) ;
+ while(!done) {
+ // wait
+ }
+ pc->printf("X=%d, Y=%d\r\n", xt, yt);
+ if(xmin>xt) xmin=xt;
+ if(xmax<xt) xmax=xt;
+ if(ymin>yt) ymin=yt;
+ if(ymax<yt) ymax=yt;
+}
+
+void print_calibration() {
+ // We have max and min values corresponding to points inside the screen area
+ // Work out the scaling factor on each axis, and adjust the origin to account for the
+ // offset used during calibration
+ float xscale, yscale;
+ int axmin, axmax, aymin, aymax;
+ xscale = (xmax - xmin) / (LCD_X_RES - 2*CAL_OFFSET);
+ axmin = xmin - CAL_OFFSET * xscale;
+ axmax = xmax + CAL_OFFSET * xscale;
+
+ yscale = (ymax - ymin) / (LCD_Y_RES - 2*CAL_OFFSET);
+ aymin = ymin - CAL_OFFSET * yscale;
+ aymax = ymax + CAL_OFFSET * yscale;
+
+ pc->printf("#define TOUCH_X_MIN %u\r\n", axmin);
+ pc->printf("#define TOUCH_X_MAX %u\r\n", axmax);
+ pc->printf("#define TOUCH_Y_MIN %u\r\n", aymin);
+ pc->printf("#define TOUCH_Y_MAX %u\r\n", aymax);
+}
+
+int main()
+{
+ pc = new Serial(USBTX, USBRX);
+ pc->baud (9600);
+ pc->printf("\n\nSystem Core Clock = %.3f MHZ\r\n",(float)SystemCoreClock/1000000);
+
+ mySCREEN = new ILI932x(PAR_8, PortC, LCD_CS, LCD_RESET, LCD_RS, LCD_WR, LCD_RD,"myLCD");
+
+ pc->printf("Screen id %d\r\n", mySCREEN->tftID);
+
+ mySCREEN->set_orientation(0);
+ mySCREEN->cls(); // clear the screen
+ mySCREEN->locate(0,0);
+ mySCREEN->background(backgroundcolor); // set background to black
+ mySCREEN->foreground(foregroundcolor); // set chars to white
+ mySCREEN->set_font((unsigned char*) Arial24x23);
+
+ touchScreen = new TouchScreen(T_DIN, T_DOUT, T_CLK, T_CS, T_IRQ);
+ touchScreen->setTouchStartHandler(&touchStart);
+ touchScreen->setTouchMoveHandler(&touchMove);
+ touchScreen->setTouchEndHandler(&touchEnd);
+ touchScreen->setLCDGeometry(LCD_X_RES, LCD_Y_RES, TOUCHSCREEN_ORIENTATION_PORTRAIT | TOUCHSCREEN_ORIENTATION_ROTATED);
+ touchScreen->setCalibration(TOUCH_X_MIN, TOUCH_X_MAX, TOUCH_Y_MIN, TOUCH_Y_MAX);
+
+ while (1) {
+ pc->printf("Calibrate..\r\n");
+ cal(CAL_OFFSET, CAL_OFFSET);
+ cal(LCD_X_RES-CAL_OFFSET, CAL_OFFSET);
+ cal(CAL_OFFSET, LCD_Y_RES-CAL_OFFSET);
+ cal(LCD_X_RES-CAL_OFFSET, LCD_Y_RES-CAL_OFFSET);
+ print_calibration();
+ Thread::wait(1000);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-rtos.lib Sat Mar 19 15:42:31 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed-rtos/#bdd541595fc5
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sat Mar 19 15:42:31 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/c0f6e94411f5 \ No newline at end of file