dsp281x_cputimers.c

基于2812的触摸屏的程序,能够显示基本图形.

//###########################################################################
//
// FILE:	DSP281x_CpuTimers.c
//
// TITLE:	DSP281x CPU 32-bit Timers Initialization & Support Functions.
//
// NOTES:   CpuTimer1 and CpuTimer2 are reserved for use with DSP BIOS and
//          other realtime operating systems.  
//
//          Do not use these two timers in your application if you ever plan
//          on integrating DSP-BIOS or another realtime OS. 
//
//          For this reason, the code to manipulate these two timers is
//          commented out and not used in these examples.
//           
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  1.00| 11 Sep 2003 | L.H  | Changes since previous version (v.58 Alpha)
//      |             |      | Removed some incorrect parameters in the timer
//      |             |      | setup that are not available on this device
//###########################################################################

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

struct CPUTIMER_VARS CpuTimer0;

// CpuTimer 1 and CpuTimer2 are reserved for DSP BIOS & other RTOS
//struct CPUTIMER_VARS CpuTimer1;
//struct CPUTIMER_VARS CpuTimer2;

//---------------------------------------------------------------------------
// InitCpuTimers: 
//---------------------------------------------------------------------------
// This function initializes all three CPU timers to a known state.
//
void InitCpuTimers(void)
{
    // CPU Timer 0
	// Initialize address pointers to respective timer registers:
	CpuTimer0.RegsAddr = &CpuTimer0Regs;
	// Initialize timer period to maximum:	
	CpuTimer0Regs.PRD.all  = 0xFFFFFFFF;
	// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):	
	CpuTimer0Regs.TPR.all  = 0x0077;		// sysclkout/120/119
	CpuTimer0Regs.TPRH.all = 0;
	//disable interrupt
	CpuTimer0Regs.TCR.bit.TIE = 0;
	// Reload all counter register with period value:
	CpuTimer0Regs.TCR.bit.TRB = 1;
	// start timer0
	CpuTimer0Regs.TCR.bit.TSS = 0;
	// Reset interrupt counters:
	//CpuTimer0.InterruptCount = 0;	             	
}	


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// No more.
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