time.c

来自「瑞泰2812的9个例程C源代码」· C语言 代码 · 共 206 行

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

// Prototype statements for functions found within this file.
interrupt void cpu_timer0_isr(void);
void Gpio_select(void);
void Gpio_PortA(void);
void Gpio_PortB(void);

#define T46uS		0x0d40
#define SCANCODE_0 0x70
#define SCANCODE_1 0x69
#define SCANCODE_2 0x72
#define SCANCODE_3 0x7A
#define SCANCODE_4 0x6B
#define SCANCODE_5 0x73
#define SCANCODE_6 0x74
#define SCANCODE_7 0x6C
#define SCANCODE_8 0x75
#define SCANCODE_9 0x7D
#define SCANCODE_Del 0x49
#define SCANCODE_Enter 0x5A
#define SCANCODE_Plus 0x79
#define SCANCODE_Minus 0x7B
#define SCANCODE_Mult 0x7C
#define SCANCODE_Divid 0x4A
#define SCANCODE_Num 0x77
#define CTRGR *(int *)0x108000
#define CTRLCDCMDR *(int *)0x108001
#define CTRKEY *(int *)0x108001
#define CTRLCDCR *(int *)0x108002
#define CTRCLKEY *(int *)0x108002
#define CTRLCDLCR  *(int *)0x108003
#define CTRLCDRCR *(int *)0x108004
#define CTRLA *(int *)0x108005
#define CTRLR *(int *)0x108007

Uint16 var1 = 0;
Uint16 var2 = 0;
Uint16 var3 = 0;
Uint16 test_count = 0;
Uint16 Test_flag = 0;
Uint16 Test_var  = 0;
Uint16 Test_status[32];
void Gpio_PortB(void)
{    

// GPIO Test #2: 
// Configure Upper 8 bits of Port as inputs and lower 8 bits as outputs    
// Loop back bits [7:0] to bits [15:8]
// Don't set any input qualifier
 
    var1= 0x0000;       // sets GPIO Muxs as I/Os
    var2= 0x00FF;       // sets GPIO 15-8 DIR as inputs, 7-0 DIR as outputs
    var3= 0x0000;       // Don't set any input qualifier
    
    Gpio_select();    
    
    test_count = 0;
    Test_status[Test_var] = 0x0002;
    Test_var++;
    
    Test_status[Test_var] = 0xD0BE;      // Set the default value of status 
                                         // to "PASSED"
    GpioDataRegs.GPBCLEAR.all = 0x00FF;  // Test Clear
    asm(" RPT #5 ||NOP");                             
    GpioDataRegs.GPBSET.bit.GPIOB5=1;
 
}

void Gpio_select(void)
{
     EALLOW;
     
    GpioMuxRegs.GPAMUX.all=var1;   // Configure MUXs as digital I/Os or
    GpioMuxRegs.GPBMUX.all=var1;   // peripheral I/Os
    GpioMuxRegs.GPDMUX.all=var1;
    GpioMuxRegs.GPFMUX.all=var1;         
    GpioMuxRegs.GPEMUX.all=var1; 
    GpioMuxRegs.GPGMUX.all=var1;
                                        
    GpioMuxRegs.GPADIR.all=var2;   // GPIO PORTs  as output
    GpioMuxRegs.GPBDIR.all=var2;   // GPIO DIR select GPIOs as output 
    GpioMuxRegs.GPDDIR.all=var2;
    GpioMuxRegs.GPEDIR.all=var2;        
    GpioMuxRegs.GPFDIR.all=var2; 
    GpioMuxRegs.GPGDIR.all=var2;

    GpioMuxRegs.GPAQUAL.all=var3;  // Set GPIO input qualifier values
    GpioMuxRegs.GPBQUAL.all=var3;   
    GpioMuxRegs.GPDQUAL.all=var3;
    GpioMuxRegs.GPEQUAL.all=var3;
 
    EDIS;
}
     

#define LEDS *(int *)0xc0000
#define CTRGR *(int *)0x108000
#define CTRLCDCMDR *(int *)0x108001
#define CTRKEY *(int *)0x108001
#define CTRLCDCR *(int *)0x108002
#define CTRCLKEY *(int *)0x108002
#define CTRLCDLCR  *(int *)0x108003
#define CTRLCDRCR *(int *)0x108004
#define CTRLA *(int *)0x108005
#define CTRLR *(int *)0x108007

int i=0,nCount=0;
unsigned int uLBD;

void main(void)
{   
	
	unsigned int uPort8000;

   InitSysCtrl();//初始化cpu

   DINT;//关中断

   InitPieCtrl();//初始化pie寄存器
   

   IER = 0x0000;//禁止所有的中断
   IFR = 0x0000;


   InitPieVectTable();//初始化pie中断向量表


   EALLOW;  // This is needed to write to EALLOW protected registers
   PieVectTable.TINT0 = &cpu_timer0_isr;//指定中断服务子程序
   EDIS;    // This is needed to disable write to EALLOW protected registers

   	CpuTimer0.RegsAddr = &CpuTimer0Regs;
	// Initialize timer period to maximum:	
	CpuTimer0Regs.PRD.all  = 0xffff;
	// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):	
	CpuTimer0Regs.TPR.all  = 0;
	CpuTimer0Regs.TIM.all  = 0;
	CpuTimer0Regs.TPRH.all = 0;
	// Make sure timer is stopped:
	CpuTimer0Regs.TCR.bit.TSS = 1;
	CpuTimer0Regs.TCR.bit.SOFT = 1;
	CpuTimer0Regs.TCR.bit.FREE = 1;
	// Reload all counter register with period value:
	CpuTimer0Regs.TCR.bit.TRB = 1;
	CpuTimer0Regs.TCR.bit.TIE = 1;
	// Reset interrupt counters:
	CpuTimer0.InterruptCount = 0;	         


   StartCpuTimer0();//启动定时器0

// 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
   CTRGR=0;		// 初始化ICETEK-CTR
   CTRGR=0x80;
   CTRGR=0;
   CTRLR=0;			// 关闭东西方向的交通灯
   CTRLR=0x40;	// 关闭南北方向的交通灯
  uPort8000=CTRCLKEY;
   GpioDataRegs.GPBDAT.bit.GPIOB5=1;
     while ( 1 )
	{
		
	}

} 


interrupt void cpu_timer0_isr(void)
{ int j,k; 
   //CpuTimer0.InterruptCount++;

   // Acknowledge this interrupt to receive more interrupts from group 1
   PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
   CpuTimer0Regs.TCR.bit.TIF = 1;
   CpuTimer0Regs.TCR.bit.TRB = 1;
   nCount++; 
   if ( nCount==0 )   
   {   
        LEDS=uLBD;   
        uLBD++; uLBD%=16;   
   }   
   nCount++; nCount%=194;//取余运算    
   
}   

   




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