TMS320F28335 Port C operations

//###########################################################################
// Description
//! \addtogroup f2833x_example_list
//! <h1>Cpu Timer (cpu_timer)</h1>
//!
//! This example configures CPU Timer0, 1, and 2 and increments
//! a counter each time the timers asserts an interrupt.
//!
//! \b Watch \b Variables \n
//! - CputTimer0.InterruptCount
//! - CpuTimer1.InterruptCount
//! - CpuTimer2.InterruptCount
//
//###########################################################################
// $TI Release: F2833x/F2823x Header Files and Peripheral Examples V141 $
// $Release Date: November  6, 2015 $
// $Copyright: Copyright (C) 2007-2015 Texas Instruments Incorporated -
//             http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################

#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File

// Prototype statements for functions found within this file.
__interrupt void cpu_timer0_isr(void);
__interrupt void cpu_timer1_isr(void);
__interrupt void cpu_timer2_isr(void);

void delay_loop();
void LCDport_init();


void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.
   InitSysCtrl();

// Step 2. Initialize GPIO:
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example

// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
   DINT;

// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.
   InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
   IER = 0x0000;
   IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
   InitPieVectTable();

// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
   EALLOW;  // This is needed to write to EALLOW protected registers
   PieVectTable.TINT0 = &cpu_timer0_isr;
   PieVectTable.XINT13 = &cpu_timer1_isr;
   PieVectTable.TINT2 = &cpu_timer2_isr;
   EDIS;    // This is needed to disable write to EALLOW protected registers

// Step 4. Initialize the Device Peripheral. This function can be
//         found in DSP2833x_CpuTimers.c
   InitCpuTimers();   // For this example, only initialize the Cpu Timers

#if (CPU_FRQ_150MHZ)
// Configure CPU-Timer 0, 1, and 2 to interrupt every second:
// 150MHz CPU Freq, 1 second Period (in uSeconds)

   ConfigCpuTimer(&CpuTimer0, 150, 1000000);
   ConfigCpuTimer(&CpuTimer1, 150, 1000000);
   ConfigCpuTimer(&CpuTimer2, 150, 1000000);
#endif

#if (CPU_FRQ_100MHZ)
// Configure CPU-Timer 0, 1, and 2 to interrupt every second:
// 100MHz CPU Freq, 1 second Period (in uSeconds)

   ConfigCpuTimer(&CpuTimer0, 100, 1000000);
   ConfigCpuTimer(&CpuTimer1, 100, 1000000);
   ConfigCpuTimer(&CpuTimer2, 100, 1000000);
#endif
// To ensure precise timing, use write-only instructions to write to the entire register. Therefore, if any
// of the configuration bits are changed in ConfigCpuTimer and InitCpuTimers (in DSP2833x_CpuTimers.h), the
// below settings must also be updated.

   CpuTimer0Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0
   CpuTimer1Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0
   CpuTimer2Regs.TCR.all = 0x4000; // Use write-only instruction to set TSS bit = 0


/*** for debug ***/

   LCDport_init();

 /*** end debug ***/


// Step 5. User specific code, enable interrupts:

// Enable CPU int1 which is connected to CPU-Timer 0, CPU int13
// which is connected to CPU-Timer 1, and CPU int 14, which is connected
// to CPU-Timer 2:
   IER |= M_INT1;
   IER |= M_INT13;
   IER |= M_INT14;

// Enable TINT0 in the PIE: Group 1 interrupt 7
   PieCtrlRegs.PIEIER1.bit.INTx7 = 1;

// 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(;;);
}

__interrupt void cpu_timer0_isr(void)
{
   CpuTimer0.InterruptCount++;

   // Acknowledge this interrupt to receive more interrupts from group 1
   PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}

__interrupt void cpu_timer1_isr(void)
{
   CpuTimer1.InterruptCount++;
   // The CPU acknowledges the interrupt.
   EDIS;
}

__interrupt void cpu_timer2_isr(void)
{  EALLOW;
   CpuTimer2.InterruptCount++;
   // The CPU acknowledges the interrupt.
   EDIS;
}

/*** debug below this line ***/

void delay_loop()
{
    long i;
    for (i = 0; i < 1000000; i++) {}
}


void LCDport_init()
{
	int x = 54;;

    // Set LCD Data pins (D0-D7), LCD R/S pin (D10), LCD R/W pin (D11) and LCD E pin(D12)
    //GpioCtrlRegs.GPCDIR.all = 0x00001CFF;   //
    EALLOW;
    GpioCtrlRegs.GPCMUX2.all = 0x00000000;  // All GPIO
        GpioCtrlRegs.GPCMUX1.all = 0x00000000;  // All GPIO
    GpioCtrlRegs.GPCDIR.all = 0xFFFFFFFF;   //
    EDIS;
    for(;;)
   {

       GpioDataRegs.GPCSET.all = 0xFFFFFFFF;
       //GpioDataRegs.GPCCLEAR.all = 0x55555555;

       delay_loop();

       GpioDataRegs.GPCCLEAR.all = 0xFFFFFFFF;
       //GpioDataRegs.GPCSET.all   = 0x55555555;

       delay_loop();

    }


}


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