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TMS320F2812 Watchdog范例程序

FILE: Example_28xWatchdog.c

//

// TITLE: DSP28 Watchdog interrupt test program.

//

// ASSUMPTIONS:

//

// This program requires the DSP28 header files. To compile the

// program as is, it should reside in the DSP28/examples/watchdog

// sub-directory.

//

// As supplied, this project is configured for "boot to H0" operation.

//

// DESCRIPTION:

// This program exercises the watchdog on the F2812/F2810 parts.

//

// First the watchdog is connected to the WAKEINT interrupt of the

// PIE block. The code is then put into an infinite loop.

//

// The user can select to feed the watchdog key register or not

// by commenting one line of code in the infinite loop.

//

// If the watchdog key register is fed by the KickDog function

// then the WAKEINT interrupt is not taken. If the key register

// is not fed by the KickDog function then WAKEINT will be taken.

//

// Watch Variables:

// LoopCount for the number of times through the infinite loop

// WakeCount for the number of times through WAKEINT

//

//###########################################################################

//

// Ver | dd mmm yyyy | Who | Description of changes

// =====|=============|======|=============================================== // 0.57| 29 May 2002 | L.H. | Initial Release

//###########################################################################

// Step 0. Include required header files

// DSP28_Device.h: device specific definitions #include statements for

// all of the peripheral .h definition files.

// DSP28_Example.h is specific for the given example.

#include "DSP28_Device.h"

// Prototype statements for functions found within this file.

interrupt void wakeint_isr(void);

// Global variable for this example

Uint32 WakeCount;

Uint32 LoopCount;

void main(void)

{

// Step 1. Initialize System Control registers, PLL, WatchDog, Clocks to default state: // For this example, this function is found in Example_WatchdogSysCtrl.c

InitSysCtrl();

// Step 2. Select GPIO for the device or for the specific application: // This function is found in the DSP28_Gpio.c file.

// InitGpio(); // Not required for this example

// Step 3. Initialize PIE vector table:

// The PIE vector table is initialized with pointers to shell Interrupt // Service Routines (ISR). The shell routines are found in DSP28_DefaultIsr.c.

// Insert user specific ISR code in the appropriate shell ISR routine in // the DSP28_DefaultIsr.c file.

// Disable and clear all CPU interrupts:

DINT;

IER = 0x0000;

IFR = 0x0000;

// Initialize Pie Control Registers To Default State:

// This function is found in the DSP28_PieCtrl.c file.

InitPieCtrl();

// Initialize the PIE Vector Table To a Known State:

// This function is found in DSP28_PieVect.c.

// This function populates the PIE vector table with pointers

// to the shell ISR functions found in DSP28_DefaultIsr.c.

InitPieVectTable();

// Step 4. Initialize all the Device Peripherals to a known state:

// This function is found in DSP28_InitPeripherals.c

// InitPeripherals(); // Not required for this example.

// Step 5. User specific functions, Reassign vectors (optional), Enable Interrupts: