added XPT2046 ginput driver
Joel Bodenmann
parent
a976c449a3
commit
ef13b27a79
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# List the required driver.
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GFXSRC += $(GFXLIB)/drivers/ginput/touch/XPT2046/ginput_lld_mouse.c
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# Required include directories
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GFXINC += $(GFXLIB)/drivers/ginput/touchXPT20466
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/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file drivers/ginput/touch/XPT2046/ginput_lld_mouse.c
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* @brief GINPUT Touch low level driver source for the XPT2046.
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*
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* @addtogroup GINPUT_MOUSE
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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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#if (GFX_USE_GINPUT && GINPUT_NEED_MOUSE) /*|| defined(__DOXYGEN__)*/
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#include "gdisp.h" /* for coord_t */
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#include "gevent.h"
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#include "ginput/ginput_mouse.h" /* for GINPUT_TOUCH_PRESSED */
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#include "lld/ginput/mouse.h"
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#if defined(GINPUT_MOUSE_USE_CUSTOM_BOARD) && GINPUT_MOUSE_USE_CUSTOM_BOARD
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#include "ginput_lld_mouse_board.h"
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#elif defined(BOARD_FIREBULL_STM32_F103)
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#include "ginput_lld_mouse_board_firebull_stm32f103.h"
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#else
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#include "ginput_lld_mouse_board_example.h"
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#endif
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static uint16_t sampleBuf[7];
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static coord_t lastx, lasty;
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/**
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* @brief 7-point median filtering code for touch samples
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*
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* @note This is an internally used routine only.
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*
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* @notapi
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*/
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static void filter(void) {
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uint16_t temp;
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int i,j;
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for(i = 0; i < 4; i++) {
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for(j = i; j < 7; j++) {
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if(sampleBuf[i] > sampleBuf[j]) {
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/* Swap the values */
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temp = sampleBuf[i];
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sampleBuf[i] = sampleBuf[j];
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sampleBuf[j] = temp;
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}
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}
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}
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}
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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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}
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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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uint16_t i;
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// If touch-off return the previous results
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if (!getpin_pressed()) {
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pt->x = lastx;
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pt->y = lasty;
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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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// Read the port to get the touch settings
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aquire_bus();
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/* Get the X value
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* Discard the first conversion - very noisy and keep the ADC on hereafter
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* till we are done with the sampling. Note that PENIRQ is disabled while reading.
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* Finally switch on PENIRQ once again - perform a dummy read.
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* Once we have the readings, find the medium using our filter function
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*/
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read_value(0xD1);
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for(i = 0; i < 7; i++)
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sampleBuf[i] = read_value(0xD1);
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read_value(0xD0);
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filter();
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lastx = (coord_t)sampleBuf[3];
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/* Get the Y value using the same process as above */
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read_value(0x91);
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for(i = 0; i < 7; i++)
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sampleBuf[i] = read_value(0x91);
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read_value(0x90);
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filter();
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lasty = (coord_t)sampleBuf[3];
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// Release the bus
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release_bus();
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// Return the results
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pt->x = lastx;
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pt->y = lasty;
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pt->z = 100;
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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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@ -0,0 +1,87 @@
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/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file drivers/ginput/touch/XPT2046/ginput_lld_mouse_board_example.h
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* @brief GINPUT Touch low level driver source for the XPT2046 on the example board.
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*
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* @addtogroup GINPUT_MOUSE
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* @{
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*/
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#ifndef _GINPUT_LLD_MOUSE_BOARD_H
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#define _GINPUT_LLD_MOUSE_BOARD_H
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/**
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* @brief Initialise the board for the touch.
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*
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* @notapi
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*/
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static __inline void init_board(void) {
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/* Code here */
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#error "ginputXPT2046: You must supply a definition for init_board for your board"
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}
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/**
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* @brief Check whether the surface is currently touched
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* @return TRUE if the surface is currently touched
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*
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* @notapi
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*/
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static __inline bool_t getpin_pressed(void) {
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/* Code here */
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#error "ginputXPT2046: You must supply a definition for getpin_pressed for your board"
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}
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/**
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* @brief Aquire the bus ready for readings
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*
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* @notapi
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*/
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static __inline void aquire_bus(void) {
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/* Code here */
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#error "ginputXPT2046: You must supply a definition for aquire_bus for your board"
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}
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/**
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* @brief Release the bus after readings
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*
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* @notapi
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*/
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static __inline void release_bus(void) {
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/* Code here */
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#error "ginputXPT2046: You must supply a definition for release_bus for your board"
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}
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/**
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* @brief Read a value from touch controller
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* @return The value read from the controller
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*
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* params[in] port The controller port to read.
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*
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* @notapi
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*/
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static __inline uint16_t read_value(uint16_t port) {
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/* Code here */
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#error "ginputXPT2046: You must supply a definition for read_value for your board"
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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/** @} */
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@ -0,0 +1,102 @@
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/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/GFX is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file drivers/ginput/touch/XPT2046/ginput_lld_mouse_board_example.h
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* @brief GINPUT Touch low level driver source for the XPT2046 on the example board.
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*
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* @addtogroup GINPUT_MOUSE
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* @{
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*/
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#ifndef _GINPUT_LLD_MOUSE_BOARD_H
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#define _GINPUT_LLD_MOUSE_BOARD_H
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static const SPIConfig spicfg = {
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NULL,
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GPIOC,
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6,
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/* SPI_CR1_BR_2 |*/ SPI_CR1_BR_1 | SPI_CR1_BR_0,
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};
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/**
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* @brief Initialise the board for the touch.
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*
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* @notapi
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*/
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static __inline void init_board(void) {
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spiStart(&SPID1, &spicfg);
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}
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/**
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* @brief Check whether the surface is currently touched
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* @return TRUE if the surface is currently touched
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*
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* @notapi
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*/
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static __inline bool_t getpin_pressed(void) {
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return (!palReadPad(GPIOC, 4));
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}
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/**
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* @brief Aquire the bus ready for readings
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*
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* @notapi
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*/
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static __inline void aquire_bus(void) {
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spiAcquireBus(&SPID1);
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//TOUCHSCREEN_SPI_PROLOGUE();
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palClearPad(GPIOC, 6);
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}
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/**
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* @brief Release the bus after readings
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*
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* @notapi
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*/
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static __inline void release_bus(void) {
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palSetPad(GPIOC, 6);
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spiReleaseBus(&SPID1);
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//TOUCHSCREEN_SPI_EPILOGUE();
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}
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/**
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* @brief Read a value from touch controller
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* @return The value read from the controller
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*
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* params[in] port The controller port to read.
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*
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* @notapi
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*/
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static __inline uint16_t read_value(uint16_t port) {
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static uint8_t txbuf[3] = {0};
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static uint8_t rxbuf[3] = {0};
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uint16_t ret;
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txbuf[0] = port;
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spiExchange(&SPID1, 3, txbuf, rxbuf);
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ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3);
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return ret;
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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/** @} */
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@ -0,0 +1,41 @@
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/*
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ChibiOS/GFX - Copyright (C) 2012
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Joel Bodenmann aka Tectu <joel@unormal.org>
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This file is part of ChibiOS/GFX.
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ChibiOS/GFX is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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||||
the Free Software Foundation; either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
ChibiOS/GFX is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
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||||
You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file drivers/ginput/touch/XPT2046/ginput_lld_mouse_config.h
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* @brief GINPUT LLD header file for mouse/touch driver.
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*
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* @addtogroup GINPUT_LLD_MOUSE
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* @{
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*/
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#ifndef _LLD_GINPUT_MOUSE_CONFIG_H
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#define _LLD_GINPUT_MOUSE_CONFIG_H
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#define GINPUT_MOUSE_EVENT_TYPE GEVENT_TOUCH
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#define GINPUT_MOUSE_NEED_CALIBRATION TRUE
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#define GINPUT_MOUSE_LLD_CALIBRATION_LOADSAVE FALSE
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#define GINPUT_MOUSE_MAX_CALIBRATION_ERROR 5
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#define GINPUT_MOUSE_READ_CYCLES 4
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#define GINPUT_MOUSE_POLL_PERIOD 25
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#define GINPUT_MOUSE_MAX_CLICK_JITTER 10
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#define GINPUT_MOUSE_MAX_MOVE_JITTER 2
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#define GINPUT_MOUSE_CLICK_TIME 500
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#endif /* _LLD_GINPUT_MOUSE_CONFIG_H */
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/** @} */
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@ -0,0 +1,9 @@
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To use this driver:
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1. Add in your halconf.h:
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a) #define GFX_USE_GINPUT TRUE
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b) #define GINPUT_NEED_MOUSE TRUE
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2. To your makefile add the following lines:
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include $(GFXLIB)/drivers/ginput/touch/XPT2046/ginput_lld.mk
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