From e27d04d002a40f3b514eeeb60d374df6a8a1280c Mon Sep 17 00:00:00 2001
From: Tectu <joel@unormal.org>
Date: Mon, 13 Aug 2012 04:12:42 +0200
Subject: restructure

---
 drivers/touchpad/touchpadADS7843/touchpad_lld.c | 146 ++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 drivers/touchpad/touchpadADS7843/touchpad_lld.c

(limited to 'drivers/touchpad/touchpadADS7843/touchpad_lld.c')

diff --git a/drivers/touchpad/touchpadADS7843/touchpad_lld.c b/drivers/touchpad/touchpadADS7843/touchpad_lld.c
new file mode 100644
index 00000000..a5265995
--- /dev/null
+++ b/drivers/touchpad/touchpadADS7843/touchpad_lld.c
@@ -0,0 +1,146 @@
+/*
+    ChibiOS-LCD-Driver - 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    touchpadADS7843/touchpad_lld.c
+ * @brief   Touchpad Driver subsystem low level driver source.
+ *
+ * @addtogroup TOUCHPAD
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "touchpad.h"
+
+#if HAL_USE_TOUCHPAD || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions.                                                 */
+/*===========================================================================*/
+
+#define TP_CS_HIGH      palSetPad(TP_CS_PORT, TP_CS)
+#define TP_CS_LOW       palClearPad(TP_CS_PORT, TP_CS)
+
+#ifdef UNUSED
+#elif defined(__GNUC__)
+# define UNUSED(x) UNUSED_ ## x __attribute__((unused))
+#elif defined(__LCLINT__)
+# define UNUSED(x) /*@unused@*/ x
+#else
+# define UNUSED(x) x
+#endif
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+#if !defined(__DOXYGEN__)
+	TOUCHPADDriver Touchpad;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables.                                                   */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/* ---- Required Routines ---- */
+
+/**
+ * @brief   Low level Touchpad driver initialization.
+ *
+ * @notapi
+ */
+void tp_lld_init(TOUCHPADDriver *tp) {
+	spiStart(tp->spid, tp->spicfg);
+}
+
+/**
+ * @brief   Reads out the X direction.
+ *
+ * @notapi
+ */
+uint16_t tp_lld_read_x(void) {
+    uint8_t txbuf[1];
+    uint8_t rxbuf[2];
+    uint16_t y;
+
+    txbuf[0] = 0xd0;
+    TP_CS_LOW;
+    spiSend(&SPID1, 1, txbuf);
+    spiReceive(&SPID1, 2, rxbuf);
+    TP_CS_HIGH;
+
+    y = rxbuf[0] << 4;
+    y |= rxbuf[1] >> 4;
+
+    return y;
+}
+
+/*
+ * @brief	Reads out the X direction.
+ *
+ * @notapi
+ */
+uint16_t tp_lld_read_y(void) {
+    uint8_t txbuf[1];
+    uint8_t rxbuf[2];
+    uint16_t y;
+
+    txbuf[0] = 0x90;
+    TP_CS_LOW;
+    spiSend(&SPID1, 1, txbuf);
+    spiReceive(&SPID1, 2, rxbuf);
+    TP_CS_HIGH;
+
+    y = rxbuf[0] << 4;
+    y |= rxbuf[1] >> 4;
+
+    return y;
+}
+
+/* ---- Optional Routines ---- */
+#if TOUCHPAD_HAS_IRQ || defined(__DOXYGEN__)
+	/*
+	 * @brief	for checking if touchpad is pressed or not.
+	 *
+	 * @return	1 if pressed / 0 if not pressed
+	 *
+	 * @noapi
+	 */
+	 uint8_t tp_lld_irq(void) {
+		return (!palReadPad(TP_IRQ_PORT, TP_IRQ));
+	}
+#endif
+
+#endif /* HAL_USE_TOUCHPAD */
+/** @} */
+
-- 
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