CodeForge.com

DSP28_CpuTimers.c in gpio.rar

			
//
//      TMDX ALPHA RELEASE
//      Intended for product evaluation purposes
//
//###########################################################################
//
// FILE:	DSP28_CpuTimers.c
//
// TITLE:	DSP28 CPU 32-bit Timers Initialization & Support Functions.
//
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  0.55| 06 May 2002 | L.H. | EzDSP Alpha Release
//  0.56| 20 May 2002 | L.H. | No change
//  0.57| 27 May 2002 | L.H. | No change
//###########################################################################

#include "DSP28_Device.h"

struct CPUTIMER_VARS CpuTimer0;
struct CPUTIMER_VARS CpuTimer1;
struct CPUTIMER_VARS CpuTimer2;

//---------------------------------------------------------------------------
// InitCpuTimers: 
//---------------------------------------------------------------------------
// This function initializes all three CPU timers to a known state.
//
void InitCpuTimers(void)
{
	// Initialize address pointers to respective timer registers:
	CpuTimer0.RegsAddr = &CpuTimer0Regs;
	CpuTimer1.RegsAddr = &CpuTimer1Regs;
	CpuTimer2.RegsAddr = &CpuTimer2Regs;

	// Initialize timer period to maximum:	
	CpuTimer0Regs.PRD.all  = 0xFFFFFFFF;
	CpuTimer1Regs.PRD.all  = 0xFFFFFFFF;
	CpuTimer2Regs.PRD.all  = 0xFFFFFFFF;

	// Initialize pre-scale counter to divide by 1 (SYSCLKOUT):	
	CpuTimer0Regs.TPR.all  = 0;
	CpuTimer0Regs.TPRH.all = 0;
	
	// Make sure timers are stopped:
	CpuTimer0Regs.TCR.bit.TSS = 1;             
	CpuTimer1Regs.TCR.bit.TSS = 1;             
	CpuTimer2Regs.TCR.bit.TSS = 1;             

	// Reload all counter registers with period values:
	CpuTimer0Regs.TCR.bit.TRB = 1;             
	CpuTimer1Regs.TCR.bit.TRB = 1;          			

			...
			...
			... to be continued.

  This is a preview. To get the complete source file, 
  please click here to download the whole source code package.