New example files

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diff --git a/boards/ek-lm4f120xl/freertos_demo/freertos_demo.c b/boards/ek-lm4f120xl/freertos_demo/freertos_demo.c
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+//*****************************************************************************

+//

+// freertos_demo.c - Simple FreeRTOS example.

+//

+// Copyright (c) 2012 Texas Instruments Incorporated.  All rights reserved.

+// Software License Agreement

+// 

+// Texas Instruments (TI) is supplying this software for use solely and

+// exclusively on TI's microcontroller products. The software is owned by

+// TI and/or its suppliers, and is protected under applicable copyright

+// laws. You may not combine this software with "viral" open-source

+// software in order to form a larger program.

+// 

+// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.

+// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT

+// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

+// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY

+// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL

+// DAMAGES, FOR ANY REASON WHATSOEVER.

+// 

+// This is part of revision 9453 of the EK-LM4F120XL Firmware Package.

+//

+//*****************************************************************************

+

+#include "inc/hw_memmap.h"

+#include "inc/hw_types.h"

+#include "driverlib/gpio.h"

+#include "driverlib/pin_map.h"

+#include "driverlib/rom.h"

+#include "driverlib/sysctl.h"

+#include "driverlib/uart.h"

+#include "utils/uartstdio.h"

+#include "led_task.h"

+#include "switch_task.h"

+#include "FreeRTOS.h"

+#include "task.h"

+#include "queue.h"

+#include "semphr.h"

+

+//*****************************************************************************

+//

+//! \addtogroup example_list

+//! <h1>FreeRTOS Example (freertos_demo)</h1>

+//!

+//! This application demonstrates the use of FreeRTOS on Launchpad.

+//!

+//! The application blinks the user-selected LED at a user-selected frequency. 

+//! To select the LED press the left button and to select the frequency press

+//! the right button.  The UART outputs the application status at 115,200 baud,

+//! 8-n-1 mode.

+//!

+//! This application utilizes FreeRTOS to perform the tasks in a concurrent

+//! fashion.  The following tasks are created:

+//!

+//! - An LED task, which blinks the user-selected on-board LED at a

+//!   user-selected rate (changed via the buttons).

+//!

+//! - A Switch task, which monitors the buttons pressed and passes the

+//!   information to LED task.

+//!

+//! In addition to the tasks, this application also uses the following FreeRTOS

+//! resources:

+//!

+//! - A Queue to enable information transfer between tasks.

+//!

+//! - A Semaphore to guard the resource, UART, from access by multiple tasks at

+//!   the same time.

+//!

+//! - A non-blocking FreeRTOS Delay to put the tasks in blocked state when they

+//!   have nothing to do.

+//!

+//! For additional details on FreeRTOS, refer to the FreeRTOS web page at:

+//! http://www.freertos.org/

+//

+//*****************************************************************************

+

+

+//*****************************************************************************

+//

+// The mutex that protects concurrent access of UART from multiple tasks.

+//

+//*****************************************************************************

+xSemaphoreHandle g_pUARTSemaphore;

+

+//*****************************************************************************

+//

+// The error routine that is called if the driver library encounters an error.

+//

+//*****************************************************************************

+#ifdef DEBUG

+void

+__error__(char *pcFilename, unsigned long ulLine)

+{

+}

+

+#endif

+

+//*****************************************************************************

+//

+// This hook is called by FreeRTOS when an stack overflow error is detected.

+//

+//*****************************************************************************

+void

+vApplicationStackOverflowHook(xTaskHandle *pxTask, signed char *pcTaskName)

+{

+    //

+    // This function can not return, so loop forever.  Interrupts are disabled

+    // on entry to this function, so no processor interrupts will interrupt

+    // this loop.

+    //

+    while(1)

+    {

+    }

+}

+

+//*****************************************************************************

+//

+// Initialize FreeRTOS and start the initial set of tasks.

+//

+//*****************************************************************************

+int

+main(void)

+{

+    //

+    // Set the clocking to run at 50 MHz from the PLL.

+    //

+    ROM_SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ |

+                       SYSCTL_OSC_MAIN);

+

+    //

+    // Initialize the UART and configure it for 115,200, 8-N-1 operation.

+    //

+    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);

+    ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);

+    GPIOPinConfigure(GPIO_PA0_U0RX);

+    GPIOPinConfigure(GPIO_PA1_U0TX);

+    ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);

+    UARTStdioInit(0);

+

+    //

+    // Print demo introduction.

+    //

+    UARTprintf("\n\nWelcome to the Stellaris EK-LM4F120 FreeRTOS Demo!\n");

+

+    //

+    // Create a mutex to guard the UART.

+    //

+    g_pUARTSemaphore = xSemaphoreCreateMutex();

+

+    //

+    // Create the LED task.

+    //

+    if(LEDTaskInit() != 0)

+    {

+        

+        while(1)

+        {

+        }

+    }

+

+    //

+    // Create the switch task.

+    //

+    if(SwitchTaskInit() != 0)

+    {

+        

+        while(1)

+        {

+        }

+    }

+

+    //

+    // Start the scheduler.  This should not return.

+    //

+    vTaskStartScheduler();

+

+    //

+    // In case the scheduler returns for some reason, print an error and loop

+    // forever.

+    //

+

+    while(1)

+    {

+    }

+}