TI-RTOS HWI TIMER

Hi  all

MCU: TM4C1294NCPDT

TI-RTOS: v2.01.00.36

CCS: v6.0.1.0040

SYS/BIOS    6.4..02.27  GA  Release  Note

I would now like to main.C in TI-RTOS's project to add MCU TM4C1294NCPDT of TIMER2, I just want to use it to count, but do not want it in the TI-RTOS interrupt is generated (ie, do not want to add an interrupt handler). I .cfg configuration file in which CCS is as follows:

main.c

//---------------------------------------------------------------------------------
// 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
TimerIntDisable(TIMER2_BASE,TIMER_A);
}

//---------------------------------------------------------------------------
// 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

}

Should I how to modify it?

I look forward to your reply!

Thanks!