1)產(chǎn)生三角波

   用EaSy HDL腳本編寫一NCP3985SN30T1G個(gè)模擬三角波信號(hào)源，如圖7-41所示（配套電子資源實(shí)例為chap7中的Triangle Wave. pdsprj）。

   圖7-41  Easy HDL腳本實(shí)現(xiàn)三角波信號(hào)源

   Easy HDL腳本如下：

   REM TRIANGLE WAVE GENERATOR

   REM Define the Waveform Parameters

   FLOAT FREQ=100, AMP=2, SLOPE-1

   FLOAT PERIOD=1/FREQ,OFFSET=O

   REM Repeating event for positive slope

   ON TIMER AT PERIOD EVERY PERIOD

   OFFSET--EVTTIME

   SLOPE=1

   ENDON

   REM Repeating event for negative slope

   ON TIMER AT PERIOD/2 EVERY PERIOD

   OFFSET=EVTTIME

    SLOPE= - 1

   ENDON

   REM Set the output as a function of both time

   REM and the current waveform slope

   OUT=AMP* SLOPE*(4*(REALTIME- OFFSET) /PERIOD-1)