Diff: main.cpp

Revision:

0:3e4f610a0689

Child:

1:9458657e49ee

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Apr 14 15:32:06 2015 +0200
@@ -0,0 +1,165 @@
+/**
+ ******************************************************************************
+ * @file    main.cpp
+ * @author  AST / EST
+ * @version V0.0.1
+ * @date    14-April-2015
+ * @brief   Example application for using the X_NUCLEO_IKS01A1 
+ *          MEMS Inertial & Environmental Nucleo expansion board.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *   1. Redistributions of source code must retain the above copyright notice,
+ *      this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright notice,
+ *      this list of conditions and the following disclaimer in the documentation
+ *      and/or other materials provided with the distribution.
+ *   3. Neither the name of STMicroelectronics nor the names of its contributors
+ *      may be used to endorse or promote products derived from this software
+ *      without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+*/ 
+
+/**
+ * @mainpage X_NUCLEO_IKS01A1 MEMS Inertial & Environmental Nucleo Expansion Board firmware package
+ *
+ * <b>Introduction</b>
+ *
+ * This firmware package includes Components Device Drivers, Board Support Package
+ * and example application for STMicroelectronics X_NUCLEO_IKS01A1 MEMS Inertial & Environmental Nucleo
+ * Expansion Board
+ * 
+ * <b>Example Application</b>
+ *
+ */
+
+
+/*** Includes ----------------------------------------------------------------- ***/
+#include "mbed.h"
+#include "x_nucleo_iks01a1.h"
+
+#include <Ticker.h>
+
+
+/*** Constants ---------------------------------------------------------------- ***/
+namespace {
+	const int MS_INTERVALS = 1000;
+}
+
+
+/*** Macros ------------------------------------------------------------------- ***/
+#define APP_LOOP_PERIOD 2000 // in ms
+
+#if defined(TARGET_K64F)
+#define USER_BUTTON (SW2)
+#elif defined(TARGET_LPC11U68)
+#define USER_BUTTON (P0_16)
+#endif // !TARGET_MCU_K64F
+
+
+/*** Static variables --------------------------------------------------------- ***/
+#ifdef DBG_MCU
+/* betzw: enable debugging while using sleep modes */
+#include "DbgMCU.h"
+static DbgMCU enable_dbg;
+#endif // DBG_MCU
+
+static X_NUCLEO_IKS01A1 *iks01a1_expansion_board = X_NUCLEO_IKS01A1::Instance();
+
+static Ticker ticker;
+static InterruptIn button(USER_BUTTON);
+
+static volatile bool timer_irq_triggered = false;
+static volatile bool button_irq_triggered = false;
+
+
+/*** Helper Functions (1/2) ------------------------------------------------------------ ***/
+
+
+/*** Interrupt Handler Top-Halves ------------------------------------------------------ ***/
+/* Called in interrupt context, therefore just set a trigger variable */
+static void timer_irq(void) {
+	timer_irq_triggered = true;
+}
+
+/* Called in interrupt context, therefore just set a trigger variable */
+static void button_irq(void) {
+	button_irq_triggered = true;
+	button.disable_irq();
+}
+
+
+/*** Interrupt Handler Bottom-Halves ------------------------------------------------- ***/
+/* Handle button irq
+   (here we are in "normal" context, i.e. not in IRQ context)
+*/
+static void handle_button_irq(void) {
+	/* TODO */
+
+	/* Re-enable button irq */
+	button.enable_irq();
+}
+
+
+/*** Helper Functions (2/2) ------------------------------------------------------------ ***/
+/* Initialization function */
+static void init(void) {
+	/* Set mode & irq handler for button */
+	button.mode(PullNone);
+	button.fall(button_irq);
+
+	/* TODO */
+}
+
+
+/*** Main function ------------------------------------------------------------- ***/
+/* Generic main function/loop for enabling WFI in case of 
+   interrupt based cyclic execution
+*/
+int main()
+{
+	/* Start & initialize */
+	printf("\n--- Starting new run ---\n");
+	init();
+
+	/* Start timer irq */
+	ticker.attach_us(timer_irq, MS_INTERVALS * APP_LOOP_PERIOD);
+
+	while (true) {
+		__disable_irq();
+		if(timer_irq_triggered) {
+			timer_irq_triggered = false;
+			__enable_irq();
+			/* TODO */
+		} else if(button_irq_triggered) {
+			button_irq_triggered = false;
+			__enable_irq();
+			handle_button_irq();
+		} else if(0 /* TODO */) {
+			/* TODO */
+			__enable_irq();
+			/* TODO */
+		} else {
+			__WFI();
+			__enable_irq(); /* do NOT enable irqs before WFI to avoid 
+					   opening a window in which you can loose
+					   irq arrivals before going into WFI */
+		}
+	}
+}