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https://github.com/digistump/DigistumpArduino.git
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Initial import of support files for all Digistump boards - Digispark, Pro, DigiX - including libraries, examples, tools, and other support files for the Arduino IDE
This commit is contained in:
Erik Tylek Kettenburg
223
hardware/digistump/sam/libraries/UTouch/UTouch.cpp
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223
hardware/digistump/sam/libraries/UTouch/UTouch.cpp
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/*
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UTouch.cpp - Arduino/chipKit library support for Color TFT LCD Touch screens
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Copyright (C)2010-2013 Henning Karlsen. All right reserved
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Basic functionality of this library are based on the demo-code provided by
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ITead studio. You can find the latest version of the library at
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http://www.henningkarlsen.com/electronics
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If you make any modifications or improvements to the code, I would appreciate
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that you share the code with me so that I might include it in the next release.
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I can be contacted through http://www.henningkarlsen.com/electronics/contact.php
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This library is free software; you can redistribute it and/or
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modify it under the terms of the CC BY-NC-SA 3.0 license.
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Please see the included documents for further information.
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*/
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#include "UTouch.h"
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#include "UTouchCD.h"
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UTouch::UTouch(byte tclk, byte tcs, byte din, byte dout, byte irq)
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{
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T_CLK = tclk;
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T_CS = tcs;
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T_DIN = din;
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T_DOUT = dout;
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T_IRQ = irq;
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}
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void UTouch::InitTouch(byte orientation)
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{
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orient = orientation;
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_default_orientation = CAL_S>>31;
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touch_x_left = (CAL_X>>14) & 0x3FFF;
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touch_x_right = CAL_X & 0x3FFF;
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touch_y_top = (CAL_Y>>14) & 0x3FFF;
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touch_y_bottom = CAL_Y & 0x3FFF;
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disp_x_size = (CAL_S>>12) & 0x0FFF;
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disp_y_size = CAL_S & 0x0FFF;
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prec = 10;
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pinMode(T_CLK, OUTPUT);
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pinMode(T_CS, OUTPUT);
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pinMode(T_DIN, OUTPUT);
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pinMode(T_DOUT, INPUT);
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pinMode(T_IRQ, OUTPUT);
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digitalWrite(T_CS, HIGH);
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digitalWrite(T_CLK, HIGH);
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digitalWrite(T_DIN, HIGH);
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digitalWrite(T_CLK, HIGH);
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}
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void UTouch::touch_WriteData(byte data)
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{
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byte temp;
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byte nop;
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temp=data;
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digitalWrite(T_CLK,LOW);
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for(byte count=0; count<8; count++)
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{
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if(temp & 0x80)
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digitalWrite(T_DIN, HIGH);
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else
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digitalWrite(T_DIN, LOW);
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temp = temp << 1;
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digitalWrite(T_CLK, LOW);
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nop++;
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digitalWrite(T_CLK, HIGH);
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nop++;
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}
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}
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word UTouch::touch_ReadData()
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{
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byte nop;
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word data = 0;
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for(byte count=0; count<12; count++)
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{
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data <<= 1;
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digitalWrite(T_CLK, HIGH);
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nop++;
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digitalWrite(T_CLK, LOW);
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nop++;
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if (digitalRead(T_DOUT))
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data++;
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}
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return(data);
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}
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void UTouch::read()
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{
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unsigned long tx=0, temp_x=0;
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unsigned long ty=0, temp_y=0;
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int datacount=0;
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digitalWrite(T_CS,LOW);
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for (int i=0; i<prec; i++)
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{
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touch_WriteData(0x90);
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digitalWrite(T_CLK,HIGH);
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digitalWrite(T_CLK,LOW);
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temp_x=touch_ReadData();
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touch_WriteData(0xD0);
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digitalWrite(T_CLK,HIGH);
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digitalWrite(T_CLK,LOW);
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temp_y=touch_ReadData();
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if (!((temp_x>max(touch_x_left, touch_x_right)) or (temp_x==0) or (temp_y>max(touch_y_top, touch_y_bottom)) or (temp_y==0)))
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{
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ty+=temp_x;
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tx+=temp_y;
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datacount++;
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}
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}
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digitalWrite(T_CS,HIGH);
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if (datacount>0)
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{
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if (orient == _default_orientation)
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{
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TP_X=tx/datacount;
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TP_Y=ty/datacount;
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}
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else
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{
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TP_X=ty/datacount;
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TP_Y=tx/datacount;
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}
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}
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else
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{
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TP_X=-1;
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TP_Y=-1;
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}
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}
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bool UTouch::dataAvailable()
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{
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bool avail;
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pinMode(T_IRQ, INPUT);
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avail = !digitalRead(T_IRQ);
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pinMode(T_IRQ, OUTPUT);
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return avail;
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}
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int UTouch::getX()
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{
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long c;
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if (orient == _default_orientation)
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{
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c = long(long(TP_X - touch_x_left) * (disp_x_size)) / long(touch_x_right - touch_x_left);
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if (c<0)
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c = 0;
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if (c>disp_x_size)
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c = disp_x_size;
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}
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else
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{
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if (_default_orientation == PORTRAIT)
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c = long(long(TP_X - touch_y_top) * (-disp_y_size)) / long(touch_y_bottom - touch_y_top) + long(disp_y_size);
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else
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c = long(long(TP_X - touch_y_top) * (disp_y_size)) / long(touch_y_bottom - touch_y_top);
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if (c<0)
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c = 0;
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if (c>disp_y_size)
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c = disp_y_size;
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}
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return c;
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}
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int UTouch::getY()
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{
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int c;
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if (orient == _default_orientation)
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{
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c = long(long(TP_Y - touch_y_top) * (disp_y_size)) / long(touch_y_bottom - touch_y_top);
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if (c<0)
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c = 0;
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if (c>disp_y_size)
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c = disp_y_size;
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}
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else
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{
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if (_default_orientation == PORTRAIT)
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c = long(long(TP_Y - touch_x_left) * (disp_x_size)) / long(touch_x_right - touch_x_left);
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else
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c = long(long(TP_Y - touch_x_left) * (-disp_x_size)) / long(touch_x_right - touch_x_left) + long(disp_x_size);
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if (c<0)
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c = 0;
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if (c>disp_x_size)
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c = disp_x_size;
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}
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return c;
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}
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void UTouch::setPrecision(byte precision)
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{
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switch (precision)
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{
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case PREC_LOW:
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prec=1;
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break;
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case PREC_MEDIUM:
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prec=10;
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break;
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case PREC_HI:
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prec=25;
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break;
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case PREC_EXTREME:
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prec=100;
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break;
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default:
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prec=10;
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break;
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}
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}
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