基于visual dsp++开发环境

				#include "system.h"
				
				/********************************************************************************/
				/***** InitPPI_Timer()														*****/
				/***** Configure PPI for output, and DMA channel zero for Writes 			*****/
				/********************************************************************************/
				void InitPPI_Timer(void)
				{
					
					// configure Timer 1 for PPI 1FS GP output mode
					// Frequency is such that 1 half of the DAC output buffer is transmitted between pulses. 
					// Pulse width is 1 PPI clock cycle
					// No interrupts assigned to timer.
				
				
					*pTIMER_DISABLE = TIMDIS1;		// disable timer 1
					*pTIMER1_PERIOD = Number_of_DAC_channels * Number_of_Samples ;
					*pTIMER1_WIDTH   = 0x001;
					*pTIMER1_CONFIG   = PWM_OUT | PULSE_HI | PERIOD_CNT | CLK_SEL | EMU_RUN;	// will need to be written again after PPI is initialised and enabled.
					asm("ssync;");
				
				}