example_dps2812m_keyboard.c

合众达开发的2812板的测试历程

/* =================================================================================
File name:       	Example_DPS2812M_KEYBOARD.C                    
                    
Originator:				SEED R&D Group
		
Description: 
                  DPS2812M Device Digital to Analog test program. 
=====================================================================================
 History:
-------------------------------------------------------------------------------------
 10-20-2005		Release	Rev 1.0         Jijunhui                                          
------------------------------------------------------------------------------*/

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
#include "Example_DPS2812M_KEYBOARD.H"

const   long 	Tp = 7500;			//PeriodCounter=ControlPeriod*Freq(us*M);HISPCP  
const   long	CPUTime_T0 = 500;       	   //CPU定时时间
unsigned int KeyCode,a=0,k;
unsigned int  Save_keyvalue[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};

interrupt void cpu_timer0_isr(void);	
void KeyValuePro(unsigned int k);

void main(void)
{

// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP281x_SysCtrl.c file.
   InitSysCtrl();

// Step 2. Initalize GPIO: 
// This example function is found in the DSP281x_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 DSP281x_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 DSP281x_DefaultIsr.c.
// This function is found in DSP281x_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;
   EDIS;    // This is needed to disable write to EALLOW protected registers
   // Step 4. Initialize all the Device Peripherals:
// This function is found in DSP281x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
   InitCpuTimers();   // For this example, only initialize the Cpu Timers

// Configure CPU-Timer 0 to interrupt every second:
// 100MHz CPU Freq, 1 second Period (in uSeconds)
   ConfigCpuTimer(&CpuTimer0, 150, CPUTime_T0);   
   StartCpuTimer0();

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

// Enable CPU INT1 which is connected to CPU-Timer 0:
   IER |= M_INT1;

// 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)
{
  int i;
  *KeyScan=8;
  for(i=0;i<6000;i++);
	KeyValuePro(1);
	
  *KeyScan=4;
  for(i=0;i<6000;i++);
	KeyValuePro(2);
		
  *KeyScan=2;
  for(i=0;i<6000;i++);
	KeyValuePro(3);
	
  *KeyScan=1;
  for(i=0;i<6000;i++);
	KeyValuePro(4);
	
	PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
	EINT;

}

void KeyValuePro(unsigned int k)	
{	
	unsigned int KeyCode;
	KeyCode=(*KeyValue)&0x0f;
    if(KeyCode!=1 )
	{	
		Save_keyvalue[k-1] = 0; 	
	}
	else
	{
		if(Save_keyvalue[k-1] == 0)
		{
			a++;
			Save_keyvalue[k-1] = 1;
		}
	}
	
	if(KeyCode!=2)		
	{	
		Save_keyvalue[k+3] = 0; 	
	}
	else
	{
		if(Save_keyvalue[k+3] == 0)
		{
			a++;
			Save_keyvalue[k+3] = 1;
		}
	}
	
	if(KeyCode!=4)		
	{	
		Save_keyvalue[k+7] = 0; 	
	}
	else
	{
		if(Save_keyvalue[k+7] == 0)
		{
			a++;
			Save_keyvalue[k+7] = 1;
		}
	}
	
	if(KeyCode!=8)		
	{	
		Save_keyvalue[k+11] = 0; 	
	}
	else
	{
		if(Save_keyvalue[k+11] == 0)
		{
			a++;
			Save_keyvalue[k+11] = 1;
		}
	}
  	//KeyCode=0x0f;
  	//KeyCode=(*KeyValue)&0x0f;
}


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