From 5a25b2b7fb257a95fb97502c330364c188242b6c Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@unormal.org>
Date: Sat, 22 Jun 2013 05:00:48 +0200
Subject: Added FT5x06 GINPUT driver

---
 drivers/ginput/touch/FT5x06/ginput_lld_mouse.c | 120 +++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 drivers/ginput/touch/FT5x06/ginput_lld_mouse.c

(limited to 'drivers/ginput/touch/FT5x06/ginput_lld_mouse.c')

diff --git a/drivers/ginput/touch/FT5x06/ginput_lld_mouse.c b/drivers/ginput/touch/FT5x06/ginput_lld_mouse.c
new file mode 100644
index 00000000..fd62e1e0
--- /dev/null
+++ b/drivers/ginput/touch/FT5x06/ginput_lld_mouse.c
@@ -0,0 +1,120 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://chibios-gfx.com/license.html
+ */
+
+/**
+ * @file    drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
+ * @brief   GINPUT Touch low level driver source for the STMPE811.
+ *
+ * @defgroup Mouse Mouse
+ * @ingroup GINPUT
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "gfx.h"
+
+#include "ft5x06.h"
+
+#if (GFX_USE_GINPUT && GINPUT_NEED_MOUSE) /*|| defined(__DOXYGEN__)*/
+
+#include "ginput/lld/mouse.h"
+
+// include board abstraction 
+#include "ginput_lld_mouse_board.h"
+
+static coord_t x, y, z;
+static uint8_t touched;
+
+/**
+ * @brief   Initialise the mouse/touch.
+ *
+ * @notapi
+ */
+void ginput_lld_mouse_init(void) {
+	init_board();
+
+	// Init default values. (From NHD-3.5-320240MF-ATXL-CTP-1 datasheet)
+	// Valid touching detect threshold
+	write_reg(FT5x06_ID_G_THGROUP, 1, 0x16);
+
+	// valid touching peak detect threshold
+	write_reg(FT5x06_ID_G_THPEAK, 1, 0x3C);
+
+	// Touch focus threshold
+	write_reg(FT5x06_ID_G_THCAL, 1, 0xE9);
+
+	// threshold when there is surface water
+	write_reg(FT5x06_ID_G_THWATER, 1, 0x01);
+
+	// threshold of temperature compensation
+	write_reg(FT5x06_ID_G_THTEMP, 1, 0x01);
+
+	// Touch difference threshold
+	write_reg(FT5x06_ID_G_THDIFF, 1, 0xA0);
+
+	// Delay to enter 'Monitor' status (s)
+	write_reg(FT5x06_ID_G_TIME_ENTER_MONITOR, 1, 0x0A);
+
+	// Period of 'Active' status (ms)
+	write_reg(FT5x06_ID_G_PERIODACTIVE, 1, 0x06);
+
+	// Timer to enter ÔidleÕ when in 'Monitor' (ms)
+	write_reg(FT5x06_ID_G_PERIODMONITOR, 1, 0x28);
+}
+
+/**
+ * @brief   Read the mouse/touch position.
+ *
+ * @param[in] pt	A pointer to the structure to fill
+ *
+ * @note			For drivers that don't support returning a position
+ *					when the touch is up (most touch devices), it should
+ *					return the previous position with the new Z value.
+ *					The z value is the pressure for those touch devices
+ *					that support it (-100 to 100 where > 0 is touched)
+ *					or, 0 or 100 for those drivers that don't.
+ *
+ * @notapi
+ */
+void ginput_lld_mouse_get_reading(MouseReading *pt) {
+	// Poll to get the touched status
+	uint8_t		last_touched;
+	
+	last_touched = touched;
+	touched = (uint8_t)read_reg(FT5x06_TOUCH_POINTS, 1) & 0x07;
+
+	// If not touched, return the previous results
+	if (touched == 0) {
+		pt->x = x;
+		pt->y = y;
+		pt->z = 0;
+		pt->buttons = 0;
+		return;
+	}
+
+	/* Get the X, Y, Z values */
+	x = (coord_t)(read_reg(FT5x06_TOUCH1_XH, 2) & 0x0fff);
+	y = (coord_t)read_reg(FT5x06_TOUCH1_YH, 2);
+	z = 100;
+
+	// Rescale X,Y,Z - X & Y don't need scaling when you are using calibration!
+#if !GINPUT_MOUSE_NEED_CALIBRATION
+	x = gdispGetWidth() - x / (4096/gdispGetWidth());
+	y = y / (4096/gdispGetHeight());
+#endif
+	
+	// Return the results. ADC gives values from 0 to 2^12 (4096)
+	pt->x = x;
+	pt->y = y;
+	pt->z = z;
+	pt->buttons = GINPUT_TOUCH_PRESSED;
+}
+
+#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
+/** @} */
+
-- 
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