TM4C1294KCPDT: TI-RTOS issue with BIOS crash

Dear Chester,

I am unable to understand this resolution , might it need efforts more from my side, meanwhile, if further steps by step solution for this you have then please share it., so we can move ahead in the project.

Regards

Khodidas 

Hi,

  In your code you plug interrupt vector yourself. By doing this, you corrupt the vector table that is managed by the BIOS. This is what the post Chester was referring to explain. You need to let BIOS handles all the HWI. 

//
// Setup the interrupts for the timer timeouts.
//
TimerIntRegister(TIMER0_BASE,TIMER_A,Timer0IntHandler);
IntRegister(INT_TIMER0A,Timer0IntHandler);
IntEnable(INT_TIMER0A);
TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
IntMasterEnable();

Below is an example for TM4C123 setting up timer 2. The BIOS registers the timer vector ledToggle using Timer_create(). You cannot use intRegister(). Please read Chester's reference post again. I think it explains everything.

Timer_create(2,(Timer_FuncPtr)ledToggle,&Timer2,NULL);

//----------------------------------------
// 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
#include <xdc/runtime/System.h>
#include <xdc/runtime/Error.h>
#include <ti/sysbios/hal/Hwi.h>
#include <ti/sysbios/hal/Timer.h>

//------------------------------------------
// 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)
{

    Timer_Params Timer2;
    Timer_Handle myTimer;

   hardware_init();							// init hardware via Xware

   Timer_Params_init(&Timer2);
   Timer2.arg=0;
   Timer2.period=100000;
   Timer2.periodType=Timer_PeriodType_MICROSECS;
   myTimer=Timer_create(2,(Timer_FuncPtr)ledToggle,&Timer2,NULL);
   Timer_start(myTimer);

   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

}

Hi, Charles,

Thank you for support, we will test it soon and update accordingly.

Regards

Khodidas