added f4 disovery file for ADS7843

drivers/ginput/touch/ADS7843/ginput_lld_mouse_board_st_stm32f4_discovery.h

@@ -0,0 +1,90 @@
+/*
+ * This file is subject to the terms of the GFX License, v1.0. 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/ADS7843/ginput_lld_mouse_board_olimex_stm32_e407.h
+ * @brief   GINPUT Touch low level driver source for the ADS7843 on an Olimex STM32E407.
+ *
+ * @defgroup Mouse Mouse
+ * @ingroup GINPUT
+ * @{
+ */
+
+#ifndef _GINPUT_LLD_MOUSE_BOARD_H
+#define _GINPUT_LLD_MOUSE_BOARD_H
+
+static const SPIConfig spicfg = { 
+    NULL,
+	GPIOC,
+    4,
+    /* SPI_CR1_BR_2 |*/ SPI_CR1_BR_1 | SPI_CR1_BR_0,
+};
+
+/**
+ * @brief   Initialise the board for the touch.
+ *
+ * @notapi
+ */
+static inline void init_board(void) {
+	spiStart(&SPID2, &spicfg);
+}
+
+/**
+ * @brief   Check whether the surface is currently touched
+ * @return	TRUE if the surface is currently touched
+ *
+ * @notapi
+ */
+static inline bool_t getpin_pressed(void) {
+	return (!palReadPad(GPIOC, 5));
+}
+/**
+ * @brief   Aquire the bus ready for readings
+ *
+ * @notapi
+ */
+static inline void aquire_bus(void) {
+	spiAcquireBus(&SPID2);
+    //TOUCHSCREEN_SPI_PROLOGUE();
+    palClearPad(GPIOC, 4);
+}
+
+/**
+ * @brief   Release the bus after readings
+ *
+ * @notapi
+ */
+static inline void release_bus(void) {
+	palSetPad(GPIOC, 4);
+	spiReleaseBus(&SPID2);
+    //TOUCHSCREEN_SPI_EPILOGUE();
+}
+
+/**
+ * @brief   Read a value from touch controller
+ * @return	The value read from the controller
+ *
+ * params[in] port	The controller port to read.
+ *
+ * @notapi
+ */
+static inline uint16_t read_value(uint16_t port) {
+    static uint8_t txbuf[3] = {0};
+    static uint8_t rxbuf[3] = {0};
+    uint16_t ret;
+
+    txbuf[0] = port;
+
+    spiExchange(&SPID2, 3, txbuf, rxbuf);
+
+    ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3); 
+    
+	return ret;
+}
+
+#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
+/** @} */