added MCU driver dummy - not implemented yet

drivers/touchscreen/MCU/readme.txt

@@ -0,0 +1,8 @@
+To use this driver:
+
+1. Add in your halconf.h:
+	a) #define GFX_USE_TOUCHSCREEN		TRUE
+
+2. To your makefile add the following lines:
+	include $(GFXLIB)/drivers/touchscreen/MCU/touchscreen_lld.mk
+

drivers/touchscreen/MCU/touchscreen_lld.c

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+/*
+    ChibiOS/GFX - Copyright (C) 2012
+                 Joel Bodenmann aka Tectu <joel@unormal.org>
+
+    This file is part of ChibiOS/GFX.
+
+    ChibiOS/GFX is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file    drivers/touchscreen/MCU/touchscreen_lld.c
+ * @brief   Touchscreen Driver subsystem low level driver source.
+ *
+ * @addtogroup TOUCHSCREEN
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "touchscreen.h"
+
+#if GFX_USE_TOUCHSCREEN /*|| defined(__DOXYGEN__)*/
+
+
+/*===========================================================================*/
+/* Driver local variables.                                                   */
+/*===========================================================================*/
+
+#if !defined(__DOXYGEN__)
+    /* Local copy of the current touchpad driver */
+    static const TouchscreenDriver *tsDriver;
+
+#endif
+
+/**
+ * @brief   Low level Touchscreen driver initialization.
+ *
+ * @param[in] ts	The touchscreen driver struct
+ *
+ * @notapi
+ */
+void ts_lld_init(const TouchscreenDriver *ts) {
+	tsDriver = ts;
+
+	/* set pins to analog input */
+	palSetPadMode(ts->ts_yd_port, ts->ts_yd_pin, PAL_MODE_INPUT_ANALOG);
+	palSetPadMode(ts->ts_yu_port, ts->ts_yu_pin, PAL_MODE_INPUT_ANALOG);
+	palSetPadMode(ts->ts_xl_port, ts->ts_yl_pin, PAL_MODE_INPUT_ANALOG);
+	palSetPadMode(ts->ts_xr_port, ts->ts_xr_pin, PAL_MODE_INPUT_ANALOG);
+}
+
+
+/**
+ * @brief   Reads a conversion from the touchscreen
+ *
+ * @param[in] cmd    The command bits to send to the touchscreen
+ *
+ * @return  The read value 12-bit right-justified
+ *
+ * @note    This function only reads data, it is assumed that the pins are
+ *          configured properly and the bus has been acquired beforehand
+ *
+ * @notapi
+ */
+uint16_t ts_lld_read_value(uint8_t cmd) {
+	return 0;
+}
+
+/**
+ * @brief   7-point median filtering code for touchscreen samples
+ *
+ * @note    This is an internally used routine only.
+ *
+ * @notapi
+ */
+static void ts_lld_filter(void) {
+	return 0;
+}
+
+/**
+ * @brief   Reads out the X direction.
+ *
+ * @note    The samples are median filtered for greater noise reduction
+ *
+ * @notapi
+ */
+uint16_t ts_lld_read_x(void) {
+	return 0;
+}
+
+/**
+ * @brief	Reads out the Y direction.
+ *
+ * @notapi
+ */
+uint16_t ts_lld_read_y(void) {
+	return 0;
+}
+
+/*
+ * @brief	Checks if touchscreen is pressed or not.
+ *
+ * @return	1 if pressed, 0 otherwise
+ *
+ * @notapi
+ */
+uint8_t ts_lld_pressed(void) {
+	return 0;
+}
+
+
+#endif /* GFX_USE_TOUCHSCREEN */
+/** @} */
+

drivers/touchscreen/MCU/touchscreen_lld.mk

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+# List the required driver.
+GFXSRC += $(GFXLIB)/drivers/touchscreen/MCU/touchscreen_lld.c
+
+# Required include directories
+GFXINC += $(GFXLIB)/drivers/touchscreen/MCU
+

drivers/touchscreen/MCU/touchscreen_lld_config.h

@@ -0,0 +1,56 @@
+/*
+    ChibiOS/GFX - Copyright (C) 2012
+                 Joel Bodenmann aka Tectu <joel@unormal.org>
+
+    This file is part of ChibiOS/GFX.
+
+    ChibiOS/GFX is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file	drivers/touchscreen/MCU/touchscreen_lld_config.h
+ * @brief   Touchscreen Driver subsystem low level driver.
+ *
+ * @addtogroup TOUCHSCREEN
+ * @{
+ */
+
+#ifndef TOUCHSCREEN_LLD_CONFIG_H
+#define TOUCHSCREEN_LLD_CONFIG_H
+
+#if GFX_USE_TOUCHSCREEN /*|| defined(__DOXYGEN__)*/
+
+/*===========================================================================*/
+/* Driver hardware support.                                                  */
+/*===========================================================================*/
+
+#define TOUCHSCREEN_HAS_PRESSED				TRUE
+#define TOUCHSCREEN_HAS_PRESSURE			FALSE
+
+struct TouchscreenDriver {
+	ioportid_t 		ts_yd_port;
+	ioportmask_t	ts_yd_pin;
+	ioportid_t 		ts_yu_port;
+	ioportmask_t	ts_yu_pin;
+	ioportid_t 		ts_xl_port;
+	ioportmask_t	ts_xl_pin;
+	ioportid_t 		ts_xr_port;
+	ioportmask_t	ts_xr_pin;
+};
+
+#endif	/* GFX_USE_TOUCHSCREEN */
+
+#endif	/* TOUCHSCREEN_LLD_CONFIG_H */
+/** @} */
+