Add FreeRTOS-Plus directory.

FreeRTOS/Demo/Common/drivers/Atmel/at91lib/utility/led.c

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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
+ * ----------------------------------------------------------------------------
+ */
+
+/*
+    Title: LED implementation
+
+    About: Purpose
+        Implementation of LED-related functionalities.
+*/
+
+//------------------------------------------------------------------------------
+//         Headers
+//------------------------------------------------------------------------------
+
+#include "led.h"
+#include <board.h>
+#include <pio/pio.h>
+
+//------------------------------------------------------------------------------
+//         Internal variables
+//------------------------------------------------------------------------------
+
+#ifdef PINS_LEDS
+static const Pin pinsLeds[] = {PINS_LEDS};
+static const unsigned int numLeds = PIO_LISTSIZE(pinsLeds);
+#endif
+
+//------------------------------------------------------------------------------
+//         Exported functions
+//------------------------------------------------------------------------------
+/*
+    Function: LED_Configure
+        Configures the pin associated with the given LED number.
+
+    Parameters:
+        led - Number of the LED to configure.
+
+    Returns:
+        1 if the LED exists and has been configured; otherwise 0.
+*/
+unsigned char LED_Configure(unsigned int led)
+{
+#ifdef PINS_LEDS
+    // Check that LED exists
+    if (led >= numLeds) {
+
+        return 0;
+    }
+
+    // Configure LED
+    return (PIO_Configure(&pinsLeds[led], 1));
+#else
+    return 0;
+#endif
+}
+
+/*
+    Function: LED_Set
+        Turns a LED on.
+
+    Parameters:
+        led - Number of the LED to turn on.
+
+    Returns:
+        1 if the LED has been turned on; 0 otherwise.
+*/
+unsigned char LED_Set(unsigned int led)
+{
+#ifdef PINS_LEDS
+    // Check if LED exists
+    if (led >= numLeds) {
+
+        return 0;
+    }
+
+    // Turn LED on
+    if (pinsLeds[led].type == PIO_OUTPUT_0) {
+
+        PIO_Set(&pinsLeds[led]);
+    }
+    else {
+
+        PIO_Clear(&pinsLeds[led]);
+    }
+
+    return 1;
+#else
+    return 0;
+#endif
+}
+
+/*
+    Function: LED_Clear
+        Turns a LED off.
+
+    Parameters:
+        led - Number of the LED to turn off.
+
+    Returns:
+        1 if the LED has been turned off; 0 otherwise.
+*/
+unsigned char LED_Clear(unsigned int led)
+{
+#ifdef PINS_LEDS
+    // Check if LED exists
+    if (led >= numLeds) {
+
+        return 0;
+    }
+
+    // Turn LED off
+    if (pinsLeds[led].type == PIO_OUTPUT_0) {
+
+        PIO_Clear(&pinsLeds[led]);
+    }
+    else {
+
+        PIO_Set(&pinsLeds[led]);
+    }
+
+    return 1;
+#else
+    return 0;
+#endif
+}
+
+/*
+    Function: LED_Toggle
+        Toggles the current state of a LED.
+
+    Parameters:
+        led - Number of the LED to toggle.
+
+    Returns:
+        1 if the LED has been toggled; otherwise 0.
+*/
+unsigned char LED_Toggle(unsigned int led)
+{
+#ifdef PINS_LEDS
+    // Check if LED exists
+    if (led >= numLeds) {
+
+        return 0;
+    }
+
+    // Toggle LED
+    if (PIO_GetOutputDataStatus(&pinsLeds[led])) {
+
+        PIO_Clear(&pinsLeds[led]);
+    }
+    else {
+
+        PIO_Set(&pinsLeds[led]);
+    }
+
+    return 1;
+#else
+    return 0;
+#endif
+}
+