1 files changed, 141 insertions, 0 deletions
diff --git a/include/touchpad_lld.h b/include/touchpad_lld.h
new file mode 100644
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--- /dev/null
+++ b/include/touchpad_lld.h
@@ -0,0 +1,141 @@
+/*
+    ChibiOS-LCD-Driver/RT - Copyright (C) 2012
+                 Joel Bodenmann aka Tectu <joel@unormal.org>
+
+    This file is part of ChibiOS-LCD-Driver.
+
+    ChibiOS-LCD-Driver 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-LCD-Driver 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	touchpad_lld.h
+ * @brief	TOUCHPAD Driver subsystem low level driver header.
+ *
+ * @addgroup TOUCHPAD
+ * @{
+ */
+
+#ifndef _TOUCHPAD_LLD_H
+#define _TOUCHPAD_LLD_H
+
+#if HAL_USE_TOUCHPAD || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Include the low level driver configuration information                    */
+/*===========================================================================*/
+
+#include "touchpad_lld_config.h"
+
+/*===========================================================================*/
+/* Error checks.                                                             */
+/*===========================================================================*/
+
+#ifndef TOUCHPAD_HAS_IRQ
+	#define TOUCHPAD_HAS_IRQ	FALSE
+#endif
+
+#ifndef TOUCHPAD_HAS_PRESSURE
+	#define TOUCHPAD_HAS_PRESSURE	FALSE
+#endif
+
+#ifndef TOUCHPAD_SPI_PROLOGUE
+    #define TOUCHPAD_SPI_PROLOGUE()
+#endif
+
+#ifndef TOUCHPAD_SPI_EPILOGUE
+    #define TOUCHPAD_SPI_EPILOGUE()
+#endif
+
+/*===========================================================================*/
+/* Driver types.                                                             */
+/*===========================================================================*/
+
+typedef struct _TOUCHPADDriver TOUCHPADDriver;
+
+/**
+ * @brief	Structure representing a Touchpad driver.
+ */
+struct _TOUCHPADDriver {
+    /*
+     * @brief   Pointer to SPI driver.
+     * @note    SPI driver must be enabled in mcuconf.h and halconf.h
+     */
+    SPIDriver       *spip;
+
+    /*
+     * @brief   Pointer to the SPI configuration structure.
+     * @note    The lowest possible speed ~ 1-2MHz is to be used, otherwise
+     *          will result in a lot of noise
+     */
+    const SPIConfig  *spicfg;
+
+    /*
+     * @brief   Touchscreen controller TPIRQ pin GPIO port
+     */
+    ioportid_t      tpIRQPort;
+
+    /*
+     * @brief   Touchscreen controller TPIRQ GPIO pin
+     * @note    The interface is polled as of now, interrupt support is
+     *          to be implemented in the future.
+     */
+    ioportmask_t    tpIRQPin;
+
+    /*
+     * @brief   Initialize the SPI with the configuration struct given or not
+     *          If TRUE, spiStart is called by the init, otherwise not
+     * @note    This is provided in such a case when SPI port is being shared
+     *          across multiple peripherals, so not to disturb the SPI bus.
+     *          You can use TOUCHPAD_SPI_PROLOGUE() and TOUCHPAD_SPI_EPILOGUE()
+     *          macros to change the SPI configuration or speed before and
+     *          after using the touchpad. An example case would be sharing the
+     *          bus with a fast flash memory chip.
+     */
+    bool_t          direct_init;
+};
+
+
+/*===========================================================================*/
+/* External declarations.                                                    */
+/*===========================================================================*/
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+	/* Core functions */
+	void tp_lld_init(const TOUCHPADDriver *tp);
+
+	uint16_t tp_lld_read_value(uint8_t cmd);
+	uint16_t tp_lld_read_x(void);
+	uint16_t tp_lld_read_y(void);
+
+	#if TOUCHPAD_HAS_IRQ
+	uint8_t tp_lld_irq(void);
+	#endif
+
+	#if TOUCHPAD_HAS_PRESSURE
+	uint16_t tp_lld_read_z(void);
+	#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_TOUCHPAD */
+
+#endif /* _TOUCHPAD_LLD_H */
+/** @} */
+