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| author | Andrew Hannam <andrewh@inmarket.com.au> | 2012-11-26 18:45:26 +1000 |
|---|---|---|
| committer | Andrew Hannam <andrewh@inmarket.com.au> | 2012-11-26 18:45:26 +1000 |
| commit | 8275c8820f230342939a2410dd0b24c0f26a14e5 (patch) | |
| tree | fcb202fb077e7d78e1381e5ef531bbf96dcca3cf /drivers/ginput/touch/ADS7843/ginput_lld_mouse.c | |
| parent | 6cc2bc280cc7dc4cb546d94219210d65c15df2e1 (diff) | |
| download | uGFX-8275c8820f230342939a2410dd0b24c0f26a14e5.tar.gz uGFX-8275c8820f230342939a2410dd0b24c0f26a14e5.tar.bz2 uGFX-8275c8820f230342939a2410dd0b24c0f26a14e5.zip | |
Ginput and structure changes
GINPUT Touch including drivers
GTIMER fixes
GEVENT fixes
GWIN button completion
Structure changes to better seperate sections of a sub-system
Diffstat (limited to 'drivers/ginput/touch/ADS7843/ginput_lld_mouse.c')
| -rw-r--r-- | drivers/ginput/touch/ADS7843/ginput_lld_mouse.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/drivers/ginput/touch/ADS7843/ginput_lld_mouse.c b/drivers/ginput/touch/ADS7843/ginput_lld_mouse.c new file mode 100644 index 00000000..de32c493 --- /dev/null +++ b/drivers/ginput/touch/ADS7843/ginput_lld_mouse.c @@ -0,0 +1,139 @@ +/*
+ ChibiOS/RT - 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/ginput/touch/ADS7843/ginput_lld_mouse.c
+ * @brief GINPUT Touch low level driver source for the ADS7843.
+ *
+ * @addtogroup GINPUT_MOUSE
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if (GFX_USE_GINPUT && GINPUT_NEED_MOUSE) /*|| defined(__DOXYGEN__)*/
+
+#include "lld/ginput/mouse.h"
+
+#if defined(GINPUT_MOUSE_USE_CUSTOM_BOARD) && GINPUT_MOUSE_USE_CUSTOM_BOARD
+ /* Include the user supplied board definitions */
+ #include "ginput_lld_mouse_board.h"
+//#elif defined(BOARD_OLIMEX_SAM7_EX256)
+// #include "ginput_lld_mouse_board_olimexsam7ex256.h"
+#else
+ #include "ginput_lld_mouse_board.h"
+#endif
+
+static uint16_t sampleBuf[7];
+static coord_t lastx, lasty;
+
+/**
+ * @brief 7-point median filtering code for touch samples
+ *
+ * @note This is an internally used routine only.
+ *
+ * @notapi
+ */
+static void filter(void) {
+ uint16_t temp;
+ int i,j;
+
+ for(i = 0; i < 4; i++) {
+ for(j = i; j < 7; j++) {
+ if(sampleBuf[i] > sampleBuf[j]) {
+ /* Swap the values */
+ temp = sampleBuf[i];
+ sampleBuf[i] = sampleBuf[j];
+ sampleBuf[j] = temp;
+ }
+ }
+ }
+}
+
+/**
+ * @brief Initialise the mouse/touch.
+ *
+ * @notapi
+ */
+void ginput_lld_mouse_init(void) {
+ init_board();
+}
+
+/**
+ * @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) {
+ // If touch-off return the previous results
+ if (!getpin_pressed()) {
+ pt->x = lastx;
+ pt->y = lasty;
+ pt->z = 0;
+ pt->buttons = 0;
+ return;
+ }
+
+ // Read the port to get the touch settings
+ aquire_bus();
+
+ /* Get the X value
+ * Discard the first conversion - very noisy and keep the ADC on hereafter
+ * till we are done with the sampling. Note that PENIRQ is disabled while reading.
+ * Finally switch on PENIRQ once again - perform a dummy read.
+ * Once we have the readings, find the medium using our filter function
+ */
+ read_value(0xD1);
+ for(i = 0; i < 7; i++)
+ sampleBuf[i] = read_value(0xD1);
+ read_value(0xD0);
+ filter();
+ lastx = (coord_t)sampleBuf[3];
+
+ /* Get the Y value using the same process as above */
+ read_value(0x91);
+ for(i = 0; i < 7; i++)
+ sampleBuf[i] = read_value(0x91);
+ read_value(0x90);
+ filter();
+ lasty = (coord_t)sampleBuf[3];
+
+ // Release the bus
+ release_bus();
+
+ // Return the results
+ pt->x = lastx;
+ pt->y = lasty;
+ pt->z = 100;
+ pt->buttons = GINPUT_TOUCH_PRESSED;
+}
+
+#endif /* GFX_USE_GINPUT && GINPUT_NEED_MOUSE */
+/** @} */
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