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-rw-r--r--drivers/touchpad/ADS7843/touchpad_lld.c485
1 files changed, 248 insertions, 237 deletions
diff --git a/drivers/touchpad/ADS7843/touchpad_lld.c b/drivers/touchpad/ADS7843/touchpad_lld.c
index 77e42133..62a1f747 100644
--- a/drivers/touchpad/ADS7843/touchpad_lld.c
+++ b/drivers/touchpad/ADS7843/touchpad_lld.c
@@ -1,237 +1,248 @@
-/*
- 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. */
-/*===========================================================================*/
-
-#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. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local variables. */
-/*===========================================================================*/
-#if !defined(__DOXYGEN__)
- /* Local copy of the current touchpad driver */
- static const TOUCHPADDriver *tpDriver;
-
- static uint16_t sampleBuf[7];
-#endif
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/* ---- Required Routines ---- */
-
-/**
- * @brief Low level Touchpad driver initialization.
- *
- * @notapi
- */
-void tp_lld_init(const TOUCHPADDriver *tp) {
- tpDriver=tp;
-
- if (tpDriver->direct_init)
- spiStart(tpDriver->spip, tpDriver->spicfg);
-}
-
-
-/**
- * @brief Reads a conversion from the touchpad
- *
- * @param[in] cmd The command bits to send to the touchpad
- *
- * @return The read value 12-bit right-justified
- *
- * @note This function only reads data, it is assumed that the pins are
- * configured properly and the bus has been acquired beforehand
- *
- * @notapi
- */
-uint16_t tp_lld_read_value(uint8_t cmd) {
- static uint8_t txbuf[3]={0};
- static uint8_t rxbuf[3]={0};
- uint16_t ret;
-
- txbuf[0]=cmd;
-
- spiExchange(tpDriver->spip, 3, txbuf, rxbuf);
-
- ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3);
-
- return ret;
-}
-
-/**
- * @brief 7-point median filtering code for touchpad samples
- *
- * @note This is an internally used routine only.
- *
- * @notapi
- */
-static void tp_lld_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 Reads out the X direction.
- *
- * @note The samples are median filtered for greater noise reduction
- *
- * @notapi
- */
-uint16_t tp_lld_read_x(void) {
- int i;
-
-#if defined(SPI_USE_MUTUAL_EXCLUSION)
- spiAcquireBus(tpDriver->spip);
-#endif
-
- TOUCHPAD_SPI_PROLOGUE();
- palClearPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
-
- /* Discard the first conversion - very noisy and keep the ADC on hereafter
- * till we are done with the sampling. Note that PENIRQ is disabled.
- */
- tp_lld_read_value(0xD1);
-
- for (i=0;i<7;i++) {
- sampleBuf[i]=tp_lld_read_value(0xD1);
- }
-
- /* Switch on PENIRQ once again - perform a dummy read */
- tp_lld_read_value(0xD0);
-
- palSetPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
- TOUCHPAD_SPI_EPILOGUE();
-
-#if defined(SPI_USE_MUTUAL_EXCLUSION)
- spiReleaseBus(tpDriver->spip);
-#endif
-
- /* Find the median - use selection sort */
- tp_lld_filter();
-
- return sampleBuf[3];
-}
-
-/*
- * @brief Reads out the Y direction.
- *
- * @notapi
- */
-uint16_t tp_lld_read_y(void) {
- int i;
-
-#if defined(SPI_USE_MUTUAL_EXCLUSION)
- spiAcquireBus(tpDriver->spip);
-#endif
-
- TOUCHPAD_SPI_PROLOGUE();
- palClearPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
-
- /* Discard the first conversion - very noisy and keep the ADC on hereafter
- * till we are done with the sampling. Note that PENIRQ is disabled.
- */
- tp_lld_read_value(0x91);
-
- for (i=0;i<7;i++) {
- sampleBuf[i]=tp_lld_read_value(0x91);
- }
-
- /* Switch on PENIRQ once again - perform a dummy read */
- tp_lld_read_value(0x90);
-
- palSetPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
- TOUCHPAD_SPI_EPILOGUE();
-
-#ifdef SPI_USE_MUTUAL_EXCLUSION
- spiReleaseBus(tpDriver->spip);
-#endif
-
- /* Find the median - use selection sort */
- tp_lld_filter();
-
- return sampleBuf[3];
-}
-
-/* ---- 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
- *
- * @notapi
- */
- uint8_t tp_lld_irq(void) {
- return (!palReadPad(tpDriver->tpIRQPort, tpDriver->tpIRQPin));
- }
-#endif
-
-#endif /* HAL_USE_TOUCHPAD */
-/** @} */
-
+/*
+ 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 touchpadXPT2046/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. */
+/*===========================================================================*/
+
+#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. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+#if !defined(__DOXYGEN__)
+ /* Local copy of the current touchpad driver */
+ static const TOUCHPADDriver *tpDriver;
+
+ static uint16_t sampleBuf[7];
+#endif
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/* ---- Required Routines ---- */
+
+/**
+ * @brief Low level Touchpad driver initialization.
+ *
+ * @notapi
+ */
+void tp_lld_init(const TOUCHPADDriver *tp) {
+ tpDriver = tp;
+
+ if(tpDriver->direct_init)
+ spiStart(tpDriver->spip, tpDriver->spicfg);
+}
+
+
+/**
+ * @brief Reads a conversion from the touchpad
+ *
+ * @param[in] cmd The command bits to send to the touchpad
+ *
+ * @return The read value 12-bit right-justified
+ *
+ * @note This function only reads data, it is assumed that the pins are
+ * configured properly and the bus has been acquired beforehand
+ *
+ * @notapi
+ */
+uint16_t tp_lld_read_value(uint8_t cmd) {
+ static uint8_t txbuf[3] = {0};
+ static uint8_t rxbuf[3] = {0};
+ uint16_t ret;
+
+ txbuf[0] = cmd;
+
+ spiExchange(tpDriver->spip, 3, txbuf, rxbuf);
+
+ ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3);
+
+ return ret;
+}
+
+/**
+ * @brief 7-point median filtering code for touchpad samples
+ *
+ * @note This is an internally used routine only.
+ *
+ * @notapi
+ */
+static void tp_lld_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 Reads out the X direction.
+ *
+ * @note The samples are median filtered for greater noise reduction
+ *
+ * @notapi
+ */
+uint16_t tp_lld_read_x(void) {
+ int i;
+
+#if defined(SPI_USE_MUTUAL_EXCLUSION)
+ spiAcquireBus(tpDriver->spip);
+#endif
+
+ TOUCHPAD_SPI_PROLOGUE();
+ palClearPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
+
+ /* Discard the first conversion - very noisy and keep the ADC on hereafter
+ * till we are done with the sampling. Note that PENIRQ is disabled.
+ */
+ tp_lld_read_value(0xD1);
+
+ for(i = 0; i < 7; i++) {
+ sampleBuf[i]=tp_lld_read_value(0xD1);
+ }
+
+ /* Switch on PENIRQ once again - perform a dummy read */
+ tp_lld_read_value(0xD0);
+
+ palSetPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
+ TOUCHPAD_SPI_EPILOGUE();
+
+#if defined(SPI_USE_MUTUAL_EXCLUSION)
+ spiReleaseBus(tpDriver->spip);
+#endif
+
+ /* Find the median - use selection sort */
+ tp_lld_filter();
+
+ return sampleBuf[3];
+}
+
+/*
+ * @brief Reads out the Y direction.
+ *
+ * @notapi
+ */
+uint16_t tp_lld_read_y(void) {
+ int i;
+
+#if defined(SPI_USE_MUTUAL_EXCLUSION)
+ spiAcquireBus(tpDriver->spip);
+#endif
+
+ TOUCHPAD_SPI_PROLOGUE();
+ palClearPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
+
+ /* Discard the first conversion - very noisy and keep the ADC on hereafter
+ * till we are done with the sampling. Note that PENIRQ is disabled.
+ */
+ tp_lld_read_value(0x91);
+
+ for(i = 0; i < 7; i++) {
+ sampleBuf[i] = tp_lld_read_value(0x91);
+ }
+
+ /* Switch on PENIRQ once again - perform a dummy read */
+ tp_lld_read_value(0x90);
+
+ palSetPad(tpDriver->spicfg->ssport, tpDriver->spicfg->sspad);
+ TOUCHPAD_SPI_EPILOGUE();
+
+#ifdef SPI_USE_MUTUAL_EXCLUSION
+ spiReleaseBus(tpDriver->spip);
+#endif
+
+ /* Find the median - use selection sort */
+ tp_lld_filter();
+
+ return sampleBuf[3];
+}
+
+/* ---- 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
+ *
+ * @notapi
+ */
+ uint8_t tp_lld_irq(void) {
+ return (!palReadPad(tpDriver->tpIRQPort, tpDriver->tpIRQPin));
+ }
+#endif
+
+#if TOUCHPAD_HAS_PRESSURE || defined(__DOXYGEN__)
+ /*
+ * @brief Reads out the Z direction / pressure.
+ *
+ * @notapi
+ */
+ uint16_t tp_lld_read_z(void) {
+ /* ToDo */
+ return 42;
+ }
+#endif
+
+#endif /* HAL_USE_TOUCHPAD */
+/** @} */
+
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