RTOS/EK-TM4C1294XL: TI-RTOS Hardware Interrupt

HI,

 I will suggest you reference the Lab5 solution. The only difference is that in the Lab5 the Hwi for the Timer2 is statically created instead of dynamically created via the Hwi_create(). Look at the code, not only the Timer2 interrupt needs to be enabled, the Timer2 needs to be properly configured (i.e the period of the timer). I don't see that in your code. I 'm not too sure why you have the heartBeatFxn task here.  I will suggest you focus on getting the Hwi working first. 

/---------------------------------------------------------------------------------
// Project: Blink TM4C BIOS Using Hwi (SOLUTION)
// Author: Eric Wilbur
// Date: June 2014
//
// Note: The function call TimerIntClear(TIMER2_BASE, TIMER_TIMA_TIMEOUT) HAS
//       to be in the ISR. This fxn clears the TIMER's interrupt flag coming
//       from the peripheral - it does NOT clear the CPU interrupt flag - that
//       is done by hardware. The author struggled figuring this part out - hence
//       the note. And, in the Swi lab, this fxn must be placed in the
//       Timer_ISR fxn because it will be the new ISR.
//
// Follow these steps to create this project in CCSv6.0:
// 1. Project -> New CCS Project
// 2. Select Template:
//    - TI-RTOS for Tiva-C -> Driver Examples -> EK-TM4C123 LP -> Example Projects ->
//      Empty Project
//    - Empty Project contains full instrumentation (UIA, RTOS Analyzer) and
//      paths set up for the TI-RTOS version of MSP430Ware
// 3. Delete the following files:
//    - Board.h, empty.c, EK_TM4C123GXL.c/h, empty_readme.txt
// 4. Add main.c from TI-RTOS Workshop Solution file for this lab
// 5. Edit empty.cfg as needed (to add/subtract) BIOS services, delete given Task
// 6. Build, load, run...
//----------------------------------------------------------------------------------


//----------------------------------------
// BIOS header files
//----------------------------------------
#include <xdc/std.h>  						//mandatory - have to include first, for BIOS types
#include <ti/sysbios/BIOS.h> 				//mandatory - if you call APIs like BIOS_start()
#include <xdc/runtime/Log.h>				//needed for any Log_info() call
#include <xdc/cfg/global.h> 				//header file for statically defined objects/handles


//------------------------------------------
// TivaWare Header Files
//------------------------------------------
#include <stdint.h>
#include <stdbool.h>

#include "inc/hw_types.h"
#include "inc/hw_memmap.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"
#include "inc/hw_ints.h"
#include "driverlib/interrupt.h"
#include "driverlib/timer.h"


//----------------------------------------
// Prototypes
//----------------------------------------
void hardware_init(void);
void ledToggle(void);


//---------------------------------------
// Globals
//---------------------------------------
volatile int16_t i16ToggleCount = 0;


//---------------------------------------------------------------------------
// main()
//---------------------------------------------------------------------------
void main(void)
{

   hardware_init();							// init hardware via Xware

   BIOS_start();

}


//---------------------------------------------------------------------------
// hardware_init()
//
// inits GPIO pins for toggling the LED
//---------------------------------------------------------------------------
void hardware_init(void)
{
	uint32_t ui32Period;

	//Set CPU Clock to 40MHz. 400MHz PLL/2 = 200 DIV 5 = 40MHz
	SysCtlClockSet(SYSCTL_SYSDIV_5|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);

	// ADD Tiva-C GPIO setup - enables port, sets pins 1-3 (RGB) pins for output
	SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
	GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);

	// Turn on the LED
	GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, 4);

	// Timer 2 setup code
	SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER2);			// enable Timer 2 periph clks
	TimerConfigure(TIMER2_BASE, TIMER_CFG_PERIODIC);		// cfg Timer 2 mode - periodic

	ui32Period = (SysCtlClockGet() /2);						// period = CPU clk div 2 (500ms)
	TimerLoadSet(TIMER2_BASE, TIMER_A, ui32Period);			// set Timer 2 period

	TimerIntEnable(TIMER2_BASE, TIMER_TIMA_TIMEOUT);		// enables Timer 2 to interrupt CPU

	TimerEnable(TIMER2_BASE, TIMER_A);						// enable Timer 2

}


//---------------------------------------------------------------------------
// ledToggle()
//
// toggles LED on Tiva-C LaunchPad
//---------------------------------------------------------------------------
void ledToggle(void)
{
    TimerIntClear(TIMER2_BASE, TIMER_TIMA_TIMEOUT);			// must clear timer flag FROM timer

	// LED values - 2=RED, 4=BLUE, 8=GREEN
	if(GPIOPinRead(GPIO_PORTF_BASE, GPIO_PIN_2))
	{
		GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, 0);
	}
	else
	{
		GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, 4);
	}

	i16ToggleCount += 1;									// keep track of #toggles

	Log_info1("LED TOGGLED [%u] TIMES",i16ToggleCount);		// send toggle count to UIA

}