[参考译文] TM4C1230E6PM：跟踪分析

您好、Dominic：

 请查看以下示例。 在此、使用 Hwi 模块通过矢量39管理 Timer2A 中断。 如果您有一个 ADC0序列0中断、您将使用矢量30并插入 ISR 函数。  

//----------------------------------------
// 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>

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

Hwi_Params hwiParams;
Hwi_Handle myHwi;
Error_Block eb;
/* Initialize error block and hwiParams to default values */
Error_init(&eb);
Hwi_Params_init(&hwiParams);
hwiParams.enableInt = FALSE;
myHwi = Hwi_create(39, (Hwi_FuncPtr)ledToggle, &hwiParams, &eb);
if (myHwi == NULL) {
System_abort("Hwi create failed");
}
Hwi_enableInterrupt(39);

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

}