126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
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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/touchscreen/MCU/touchscreen_lld.c
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* @brief Touchscreen Driver subsystem low level driver source.
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*
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* @addtogroup TOUCHSCREEN
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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 "touchscreen.h"
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#if GFX_USE_TOUCHSCREEN /*|| defined(__DOXYGEN__)*/
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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#if !defined(__DOXYGEN__)
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/* Local copy of the current touchpad driver */
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static const TouchscreenDriver *tsDriver;
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#endif
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/**
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* @brief Low level Touchscreen driver initialization.
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*
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* @param[in] ts The touchscreen driver struct
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*
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* @notapi
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*/
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void ts_lld_init(const TouchscreenDriver *ts) {
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tsDriver = ts;
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/* set pins to analog input */
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palSetPadMode(ts->ts_yd_port, ts->ts_yd_pin, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(ts->ts_yu_port, ts->ts_yu_pin, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(ts->ts_xl_port, ts->ts_yl_pin, PAL_MODE_INPUT_ANALOG);
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palSetPadMode(ts->ts_xr_port, ts->ts_xr_pin, PAL_MODE_INPUT_ANALOG);
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}
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/**
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* @brief Reads a conversion from the touchscreen
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*
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* @param[in] cmd The command bits to send to the touchscreen
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*
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* @return The read value 12-bit right-justified
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*
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* @note This function only reads data, it is assumed that the pins are
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* configured properly and the bus has been acquired beforehand
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*
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* @notapi
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*/
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uint16_t ts_lld_read_value(uint8_t cmd) {
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return 0;
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}
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/**
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* @brief 7-point median filtering code for touchscreen 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 ts_lld_filter(void) {
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return 0;
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}
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/**
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* @brief Reads out the X direction.
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*
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* @note The samples are median filtered for greater noise reduction
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*
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* @notapi
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*/
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uint16_t ts_lld_read_x(void) {
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return 0;
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}
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/**
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* @brief Reads out the Y direction.
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*
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* @notapi
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*/
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uint16_t ts_lld_read_y(void) {
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return 0;
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}
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/*
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* @brief Checks if touchscreen is pressed or not.
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*
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* @return 1 if pressed, 0 otherwise
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*
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* @notapi
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*/
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uint8_t ts_lld_pressed(void) {
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return 0;
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}
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#endif /* GFX_USE_TOUCHSCREEN */
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/** @} */
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