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 exampleUint32 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.cInitSysCtrl();// 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:// Reassign the PIE vector for WAKEINT to point to a different ISR then// the shell routine found in DSP28_DefaultIsr.c.// This is done if the user does not want to use the shell ISR routine// but instead wants to use their own ISR. This step is optional:EALLOW; // This is needed to write to EALLOW protected registersPieVectTable.WAKEINT = &wakeint_isr;EDIS; // This is needed to disable write to EALLOW protected registers// Include application specific functions. This is for this example:// Enable INT1 which is connected to WAKEINT:IER |= M_INT1;// Enable WAKEINT in the PIE: Group 1 interrupt 8PieCtrlRegs.PIEIER1.bit.INTx8 = 1;// Connect the watchdog to the WAKEINT interrupt of the PIE// Write to the whole SCSR register to avoid clearing WDOVERRIDE bitEALLOW;SysCtrlRegs.SCSR.all = BIT1; //#define BIT1 0x0002该位为1时，看门狗输出复位信号无效，看门狗中断输出信号有效；若为0，则输出复位信号有效，中断输出信号无效。

EDIS;// Clear the countersWakeCount = 0; // Count interruptsLoopCount = 0; // Count times through idle loop// Enable global Interrupts and higher priority real-time debug events:EINT; // Enable Global interrupt INTMERTM; // Enable Global realtime interrupt DBGM// Step 6. IDLE loop. Just sit and loop forever (optional):for(;;){LoopCount++;// Uncomment(不受约束的) KickDog to just loop here// Comment KickDog to take the WAKEINT instead// KickDog();}// Step 7. Insert all local Interrupt Service Routines (ISRs) and functions here:// If local ISRs are used, reassign vector addresses in vector table as// shown in Step 5interrupt void wakeint_isr(void){WakeCount++;// Acknowledge this interrupt to get more from group 1PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;}//=========================================================================== // No more.//===========================================================================。