ginput/touch/MCU Olimex PIC32 LCD board file

drivers/ginput/touch/MCU/ginput_lld_mouse.c

@@ -40,6 +40,8 @@
 	#include "ginput_lld_mouse_board.h"
 #elif defined(BOARD_OLIMEX_STM32_LCD)
 	#include "ginput_lld_mouse_board_olimex_stm32_lcd.h"
+#elif defined(BOARD_OLIMEX_PIC32MX_LCD)
+	#include "ginput_lld_mouse_board_olimex_pic32mx_lcd.h"
 #else
 	#include "ginput_lld_mouse_board.h"
 #endif

drivers/ginput/touch/MCU/ginput_lld_mouse_board_olimex_pic32mx_lcd.h

@@ -0,0 +1,164 @@
+/*
+    ChibiOS/GFX - Copyright (C) 2013
+                 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/MCU/ginput_lld_mouse_board_olimex_stm32_lcd.h
+ * @brief   GINPUT Touch low level driver source for the MCU on the example board.
+ *
+ * @defgroup Mouse Mouse
+ * @ingroup GINPUT
+ *
+ * @{
+ */
+
+#ifndef _GINPUT_LLD_MOUSE_BOARD_H
+#define _GINPUT_LLD_MOUSE_BOARD_H
+
+static const ADCConfig ADCC = {
+  .vref = ADC_VREF_CFG_AVDD_AVSS,
+  .stime = 15,
+  .irq = EIC_IRQ_ADC,
+  .base = _ADC10_BASE_ADDRESS,
+};
+static struct ADCDriver ADCD;
+
+#define YNEG 13 // U
+#define XNEG 15 // R
+#define XPOS 12 // L
+#define YPOS 11 // D
+
+#define ADC_MAX 1023
+
+#define TOUCH_THRESHOULD 50
+
+static const ADCConversionGroup ADC_X_CG = {
+  .circular = FALSE,
+  .num_channels = 1,
+  .channels = 1 << XNEG,
+};
+
+static const ADCConversionGroup ADC_Y_CG = {
+  .circular = FALSE,
+  .num_channels = 1,
+  .channels = 1 << YPOS,
+};
+
+/**
+ * @brief   Initialise the board for the touch.
+ *
+ * @notapi
+ */
+static inline void init_board(void) {
+  adcObjectInit(&ADCD);
+  adcStart(&ADCD, &ADCC);
+}
+
+/**
+ * @brief   Check whether the surface is currently touched
+ * @return	TRUE if the surface is currently touched
+ *
+ * @notapi
+ */
+static inline bool_t getpin_pressed(void) {
+  adcsample_t samples[2] = {0, };
+
+  // Set X+ to ground
+  palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
+  palClearPad(IOPORTB, XPOS);
+
+  // Set Y- to VCC
+  palSetPadMode(IOPORTB, YNEG, PAL_MODE_OUTPUT);
+  palSetPad(IOPORTB, YNEG);
+
+  palSetPadMode(IOPORTB, XNEG, PAL_MODE_INPUT_ANALOG);
+  palSetPadMode(IOPORTB, YPOS, PAL_MODE_INPUT_ANALOG);
+
+  adcConvert(&ADCD, &ADC_X_CG, &samples[0], 1);
+  adcConvert(&ADCD, &ADC_Y_CG, &samples[1], 1);
+
+  return (ADC_MAX - (samples[1] - samples[0])) > TOUCH_THRESHOULD;
+}
+
+/**
+ * @brief   Aquire the bus ready for readings
+ *
+ * @notapi
+ */
+static inline void aquire_bus(void) {
+}
+
+/**
+ * @brief   Release the bus after readings
+ *
+ * @notapi
+ */
+static inline void release_bus(void) {
+}
+
+/**
+ * @brief   Read an x value from touch controller
+ * @return	The value read from the controller
+ *
+ * @notapi
+ */
+static inline uint16_t read_x_value(void) {
+  adcsample_t sample;
+
+  palSetPadMode(IOPORTB, XPOS, PAL_MODE_OUTPUT);
+  palSetPad(IOPORTB, XPOS);
+
+  palSetPadMode(IOPORTB, XNEG, PAL_MODE_OUTPUT);
+  palClearPad(IOPORTB, XNEG);
+
+  palSetPadMode(IOPORTB, YNEG, PAL_MODE_INPUT);
+
+  palSetPadMode(IOPORTB, YPOS, PAL_MODE_INPUT_ANALOG);
+
+  adcConvert(&ADCD, &ADC_Y_CG, &sample, 1);
+
+  return ADC_MAX - sample;
+}
+
+/**
+ * @brief   Read an y value from touch controller
+ * @return	The value read from the controller
+ *
+ * @notapi
+ */
+static inline uint16_t read_y_value(void) {
+  adcsample_t sample;
+
+  palSetPadMode(IOPORTB, YNEG, PAL_MODE_OUTPUT);
+  palClearPad(IOPORTB, YNEG);
+
+  palSetPadMode(IOPORTB, YPOS, PAL_MODE_OUTPUT);
+  palSetPad(IOPORTB, YPOS);
+
+  palSetPadMode(IOPORTB, XPOS, PAL_MODE_INPUT);
+
+  palSetPadMode(IOPORTB, XNEG, PAL_MODE_INPUT_ANALOG);
+
+  adcConvert(&ADCD, &ADC_X_CG, &sample, 1);
+
+  return ADC_MAX - sample;
+}
+
+#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
+/** @} */