drivers/lcd/tft/touchscreen.h

   1 /**************************************************************************/
   2 /*!
   3     @file     touchscreen.h
   4     @author   K. Townsend (microBuilder.eu)
   5
   6     @section LICENSE
   7
   8     Software License Agreement (BSD License)
   9
  10     Copyright (c) 2010, microBuilder SARL
  11     All rights reserved.
  12
  13     Redistribution and use in source and binary forms, with or without
  14     modification, are permitted provided that the following conditions are met:
  15     1. Redistributions of source code must retain the above copyright
  16     notice, this list of conditions and the following disclaimer.
  17     2. Redistributions in binary form must reproduce the above copyright
  18     notice, this list of conditions and the following disclaimer in the
  19     documentation and/or other materials provided with the distribution.
  20     3. Neither the name of the copyright holders nor the
  21     names of its contributors may be used to endorse or promote products
  22     derived from this software without specific prior written permission.
  23
  24     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  25     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  26     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  27     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  28     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  29     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  30     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  31     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  32     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34 */
  35 /**************************************************************************/
  36 #ifndef __TOUCHSCREEN_H__
  37 #define __TOUCHSCREEN_H__
  38
  39 #include "projectconfig.h"
  40
  41 #define TS_XP_PORT        (1)
  42 #define TS_XP_PIN         (0)
  43 #define TS_XP_FUNC_GPIO   do {IOCON_JTAG_TMS_PIO1_0 &= ~(IOCON_JTAG_TMS_PIO1_0_FUNC_MASK | IOCON_JTAG_TMS_PIO1_0_ADMODE_MASK); IOCON_JTAG_TMS_PIO1_0 |= IOCON_JTAG_TMS_PIO1_0_FUNC_GPIO;} while (0)
  44 #define TS_XP_FUNC_ADC    do {IOCON_JTAG_TMS_PIO1_0 &= ~(IOCON_JTAG_TMS_PIO1_0_FUNC_MASK | IOCON_JTAG_TMS_PIO1_0_ADMODE_MASK); IOCON_JTAG_TMS_PIO1_0 |= IOCON_JTAG_TMS_PIO1_0_FUNC_AD1;} while (0)
  45
  46 #define TS_XM_PORT        (1)
  47 #define TS_XM_PIN         (1)
  48 #define TS_XM_FUNC_GPIO   do {IOCON_JTAG_TDO_PIO1_1 &= ~(IOCON_JTAG_TDO_PIO1_1_FUNC_MASK | IOCON_JTAG_TDO_PIO1_1_ADMODE_MASK); IOCON_JTAG_TDO_PIO1_1 |= IOCON_JTAG_TDO_PIO1_1_FUNC_GPIO;} while (0)
  49 #define TS_XM_FUNC_ADC    do {IOCON_JTAG_TDO_PIO1_1 &= ~(IOCON_JTAG_TDO_PIO1_1_FUNC_MASK | IOCON_JTAG_TDO_PIO1_1_ADMODE_MASK); IOCON_JTAG_TDO_PIO1_1 |= IOCON_JTAG_TDO_PIO1_1_FUNC_AD2;} while (0)
  50
  51 #define TS_YP_PORT        (0)
  52 #define TS_YP_PIN         (11)
  53 #define TS_YP_FUNC_GPIO   do {IOCON_JTAG_TDI_PIO0_11 &= ~(IOCON_JTAG_TDI_PIO0_11_FUNC_MASK | IOCON_JTAG_TDI_PIO0_11_ADMODE_MASK); IOCON_JTAG_TDI_PIO0_11 |= IOCON_JTAG_TDI_PIO0_11_FUNC_GPIO;} while (0)
  54 #define TS_YP_FUNC_ADC    do {IOCON_JTAG_TDI_PIO0_11 &= ~(IOCON_JTAG_TDI_PIO0_11_FUNC_MASK | IOCON_JTAG_TDI_PIO0_11_ADMODE_MASK); IOCON_JTAG_TDI_PIO0_11 |= IOCON_JTAG_TDI_PIO0_11_FUNC_AD0;} while (0)
  55
  56 #define TS_YM_PORT        (1)
  57 #define TS_YM_PIN         (2)
  58 #define TS_YM_FUNC_GPIO   do {IOCON_JTAG_nTRST_PIO1_2 &= ~(IOCON_JTAG_nTRST_PIO1_2_FUNC_MASK | IOCON_JTAG_nTRST_PIO1_2_ADMODE_MASK); IOCON_JTAG_nTRST_PIO1_2 |= IOCON_JTAG_nTRST_PIO1_2_FUNC_GPIO;} while (0)
  59 #define TS_YM_FUNC_ADC    do {IOCON_JTAG_nTRST_PIO1_2 &= ~(IOCON_JTAG_nTRST_PIO1_2_FUNC_MASK | IOCON_JTAG_nTRST_PIO1_2_ADMODE_MASK); IOCON_JTAG_nTRST_PIO1_2 |= IOCON_JTAG_nTRST_PIO1_2_FUNC_AD3;} while (0)
  60
  61 #define TS_YP_ADC_CHANNEL   (0)   // ADC0.0
  62 #define TS_XP_ADC_CHANNEL   (1)   // ADC0.1
  63 #define TS_XM_ADC_CHANNEL   (2)   // ADC0.2
  64 #define TS_YM_ADC_CHANNEL   (3)   // ADC0.3
  65
  66 typedef struct Point
  67 {
  68   int32_t x;
  69   int32_t y;
  70 } tsPoint_t;
  71
  72 typedef struct Matrix
  73 {
  74   int32_t An,
  75           Bn,
  76           Cn,
  77           Dn,
  78           En,
  79           Fn,
  80           Divider ;
  81 } tsMatrix_t;
  82
  83 typedef struct
  84 {
  85   uint32_t xraw;  // Touch screen x
  86   uint32_t yraw;  // Touch screen Y
  87   uint16_t xlcd;  // LCD co-ordinate X
  88   uint16_t ylcd;  // LCD co-ordinate Y
  89   uint32_t z1;
  90   uint32_t z2;
  91   bool valid;     // Whether this is a valid reading or not
  92 } tsTouchData_t;
  93
  94 typedef enum
  95 {
  96   TS_ERROR_NONE         = 0,
  97   TS_ERROR_TIMEOUT      = -1,   // Timeout occured before a valid reading
  98   TS_ERROR_XYMISMATCH   = -2    // Unable to get a stable X/Y value
  99 } tsTouchError_t;
 100
 101 // Method Prototypes
 102 void           tsInit ( void );
 103 tsTouchError_t tsRead(tsTouchData_t* data);
 104 void           tsCalibrate ( void );
 105 tsTouchError_t tsWaitForEvent(tsTouchData_t* data, uint32_t timeoutMS);
 106 int            tsSetThreshhold(uint8_t value);
 107 uint8_t        tsGetThreshhold(void);
 108
 109 #endif