121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
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* @brief GINPUT Touch low level driver source for the STMPE811.
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*
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* @defgroup Mouse Mouse
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* @ingroup GINPUT
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* @{
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*/
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#include "ch.h"
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#include "hal.h"
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#include "gfx.h"
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#include "ft5x06.h"
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#if (GFX_USE_GINPUT && GINPUT_NEED_MOUSE) /*|| defined(__DOXYGEN__)*/
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#include "ginput/lld/mouse.h"
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// include board abstraction
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#include "ginput_lld_mouse_board.h"
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static coord_t x, y, z;
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static uint8_t touched;
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/**
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* @brief Initialise the mouse/touch.
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*
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* @notapi
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*/
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void ginput_lld_mouse_init(void) {
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init_board();
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// Init default values. (From NHD-3.5-320240MF-ATXL-CTP-1 datasheet)
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// Valid touching detect threshold
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write_reg(FT5x06_ID_G_THGROUP, 1, 0x16);
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// valid touching peak detect threshold
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write_reg(FT5x06_ID_G_THPEAK, 1, 0x3C);
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// Touch focus threshold
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write_reg(FT5x06_ID_G_THCAL, 1, 0xE9);
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// threshold when there is surface water
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write_reg(FT5x06_ID_G_THWATER, 1, 0x01);
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// threshold of temperature compensation
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write_reg(FT5x06_ID_G_THTEMP, 1, 0x01);
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// Touch difference threshold
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write_reg(FT5x06_ID_G_THDIFF, 1, 0xA0);
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// Delay to enter 'Monitor' status (s)
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write_reg(FT5x06_ID_G_TIME_ENTER_MONITOR, 1, 0x0A);
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// Period of 'Active' status (ms)
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write_reg(FT5x06_ID_G_PERIODACTIVE, 1, 0x06);
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// Timer to enter ÔidleÕ when in 'Monitor' (ms)
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write_reg(FT5x06_ID_G_PERIODMONITOR, 1, 0x28);
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}
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/**
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* @brief Read the mouse/touch position.
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*
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* @param[in] pt A pointer to the structure to fill
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*
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* @note For drivers that don't support returning a position
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* when the touch is up (most touch devices), it should
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* return the previous position with the new Z value.
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* The z value is the pressure for those touch devices
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* that support it (-100 to 100 where > 0 is touched)
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* or, 0 or 100 for those drivers that don't.
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*
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* @notapi
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*/
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void ginput_lld_mouse_get_reading(MouseReading *pt) {
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// Poll to get the touched status
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uint8_t last_touched;
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last_touched = touched;
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touched = (uint8_t)read_reg(FT5x06_TOUCH_POINTS, 1) & 0x07;
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// If not touched, return the previous results
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if (touched == 0) {
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pt->x = x;
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pt->y = y;
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pt->z = 0;
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pt->buttons = 0;
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return;
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}
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/* Get the X, Y, Z values */
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x = (coord_t)(read_reg(FT5x06_TOUCH1_XH, 2) & 0x0fff);
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y = (coord_t)read_reg(FT5x06_TOUCH1_YH, 2);
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z = 100;
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// Rescale X,Y,Z - X & Y don't need scaling when you are using calibration!
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#if !GINPUT_MOUSE_NEED_CALIBRATION
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x = gdispGetWidth() - x / (4096/gdispGetWidth());
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y = y / (4096/gdispGetHeight());
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#endif
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// Return the results. ADC gives values from 0 to 2^12 (4096)
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pt->x = x;
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pt->y = y;
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pt->z = z;
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pt->buttons = GINPUT_TOUCH_PRESSED;
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}
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#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
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/** @} */
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