//
//      TMDX ALPHA RELEASE
//      Intended for product evaluation purposes
//
//###########################################################################
//
// 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:
 
    // 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 registers
 PieVectTable.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 8
 PieCtrlRegs.PIEIER1.bit.INTx8 = 1;
 
 // Connect the watchdog to the WAKEINT interrupt of the PIE
 // Write to the whole SCSR register to avoid clearing WDOVERRIDE bit
 EALLOW;
 SysCtrlRegs.SCSR.all = BIT1;
    EDIS;
   
    // Clear the counters
    WakeCount = 0; // Count interrupts
    LoopCount = 0; // Count times through idle loop

    // Enable global Interrupts and higher priority real-time debug events:
 
 EINT;   // Enable Global interrupt INTM
 ERTM; // Enable Global realtime interrupt DBGM

// Step 6. IDLE loop. Just sit and loop forever (optional): 
 for(;;)
 {
     LoopCount++;
    
        // Uncomment 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 5

interrupt void wakeint_isr(void)
{
 WakeCount++;
 
 // Acknowledge this interrupt to get more from group 1
 PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

//===========================================================================
// No more.
//===========================================================================