Diff: poll.h

Revision:

10:9d9b3b9b28b8

Child:

11:1da15361a35b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/poll.h	Wed May 24 11:21:37 2017 +0000
@@ -0,0 +1,107 @@
+#include "stdio.h"
+
+#include "SPI_TFT_ILI9341.h"
+
+
+
+
+
+
+// example to test the TFT Display from Mikroelectronika
+
+
+
+// the display has a backlight switch on board
+//DigitalOut LCD_LED(PTA4);   // may not be needed on mikroelectronika board
+//DigitalOut pwr(PTD7); // ditto
+
+// the TFT is connected to SPI pin 5-7
+//SPI_TFT_ILI9341 TFT(p5, p6, p7, p8, p9, p10,"TFT"); // mosi, miso, sclk, cs, reset, dc for lpc1768
+SPI_TFT_ILI9341 TFT(PTD6, PTD7, PTD5, PTD2, PTD4, PTA13, "TFT"); // mosi, miso, sclk, cs, reset, dc for frdmkl25z
+//NB better combination to use a coherent 2x4 block for lcd
+//   SPI_TFT_ILI9341 TFT(PTD2, PTD3, PTD1, PTA16, PTA17, PTC16,"TFT"); // mosi, miso, sclk, cs, reset, dc for frdmkl25z
+//   DigitalOut LCD_LED(PTC17);
+int touching = 0;
+
+// Subroutine to read the x location of the touch point
+// need to set x+ to 3V and ground x- then read analogue voltage on ym
+//nb need to add a check for actual touch as opposed to random crap
+
+
+
+
+
+int readX()
+{
+    int delta = 0, xv1 = 0, xv2 = 0, k = 0;
+    int temp1 = 0, temp2 = 0;
+
+    AnalogIn yp(PTB3);
+    AnalogIn ym(PTB2);
+    DigitalOut xp(PTB0);
+    DigitalOut xm(PTB1);
+
+    xp = 1; // set positive sdie of x high
+    xm = 0;
+    // dont need to do anyhting to set low side as it should be fine.
+    // but do need to disconnect yp
+    //yp.PinMode(PullNone)
+    delta = 0;
+    for(k = 0; k < 10; k++) { // make 10 readings to average
+        temp1 = (int)ym.read_u16();
+        temp2 = (int)yp.read_u16();
+        xv1 += temp1;  // get value
+        xv2 += temp2; // get other value
+        delta += abs(temp1 - temp2) / 10; //gets individual differences
+       // pc.printf("val1 = %d - val2 = %d-diff = %d\n\r",temp1,temp2,temp1-temp2);
+        //observing behaviour when touching / nt touching
+        
+    }
+    //delta=abs(xv2-xv1)/10;
+    if(delta < 300) touching = 1;
+    else touching = 0;
+    pc.printf("delta=%d \t %d\n\r",delta,touching);
+    xp = 0;
+    xm = 0;
+    return (240 - (240 * ((xv2) / 1 / 10 - 5800)) / 51200); //returns the average of both
+    //return(xv2/10); //maybe better to return the average of both....
+}
+// subroutine to read y values - has different pin functions ..
+int readY()
+{
+    DigitalOut yp(PTB3);
+    DigitalOut ym(PTB2);
+    AnalogIn xp(PTB0);
+    AnalogIn xm(PTB1);
+    int delta = 0, yv1 = 0, yv2 = 0, k = 0;
+    int temp1 = 0, temp2 = 0;
+    yp = 1; // set positive sdie of x high
+    ym = 0;
+    // dont need to do anyhting to set low side as it should be fine.
+    // but do need to disconnect yp
+    //yp.PinMode(PullNone)
+    delta = 0;
+    for(k = 0; k < 10; k++) { // make 10 readings to average
+        temp1 = (int)xm.read_u16();
+        temp2 = (int)xp.read_u16();
+        yv1 += temp1;  // get value
+        yv2 += temp2; // get other value
+        delta += abs(temp1 - temp2) / 10;
+        //pc.printf("val1 = %d - val2 = %d-diff = %d\n\r",temp1,temp2,temp1-temp2);
+    }
+    //int yval=(int)xm.read_u16();  // get value
+    //pc.printf("yval=%d",yval);
+    yp = 0;
+    ym = 0;
+    return (320 - (320 * ((yv2) / 1 / 10 - 3000)) / 58300);   // returns Y
+//    return(yval);
+
+}
+
+
+
+void poll(){
+    int xp,yp = 0;
+    xp=readX();
+    yp=readY();
+}
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