【正文】 =toneindex=9。when 12 =toneindex=6。 when 13 =toneindex=8。 when 14 =toneindex=5。 when 15 =toneindex=5。 when 16 =toneindex=12。 when 17 =toneindex=12。when 18 =toneindex=12。 when 19 =toneindex=15。 when 20 =toneindex=13。when 21 =toneindex=12。 when 22 =toneindex=10。 when 23 =toneindex=12。 when 24 =toneindex=9。when 25 =toneindex=9。when 26 =toneindex=9。when 27 =toneindex=9。when 28 =toneindex=9。when 29 =toneindex=9。when 30 =toneindex=9。when 31 =toneindex=9。when 32 =toneindex=9。when 33 =toneindex=9。when 34 =toneindex=9。when 35 =toneindex=10。when 36 =toneindex=7。when 37 =toneindex=7。when 38=toneindex=6。when 39 =toneindex=6。when 40 =toneindex=5。when 41 =toneindex=5。when 42 =toneindex=5。 when 43 =toneindex=6。when 44 =toneindex=8。when 45 =toneindex=8。when 46 =toneindex=9。when 47 =toneindex=9。when 48 =toneindex=3。when 49 =toneindex=3。when 50 =toneindex=8。when 51=toneindex=8。when 52 =toneindex=6。when 53=toneindex=5。when 54=toneindex=6。when 55=toneindex=8。when 56 =toneindex=5。when 57 =toneindex=5。when 58 =toneindex=5。when 59 =toneindex=5。when 60 =toneindex=5。when 61 =toneindex=5。when 62 =toneindex=5。when 63 =toneindex=5。when 64 =toneindex=10。when 65 =toneindex=10。 when 66 =toneindex=10。when 67 =toneindex=12。when 68 =toneindex=7。 when 69 =toneindex=7。when 70=toneindex=9。 when 71 =toneindex=9。when 72 =toneindex=6。when 73 =toneindex=8。when 74 =toneindex=5。when 75 =toneindex=5。when 76 =toneindex=5。when 77 =toneindex=5。when 78 =toneindex=5。when 79 =toneindex=5。when 80 =toneindex=3。when 81 =toneindex=5。when 82 =toneindex=3。when 83 =toneindex=3。when 84 =toneindex=5。when 85 =toneindex=6。when 86 =toneindex=7。when 87 =toneindex=9。when 88=toneindex=6。 when 89 =toneindex=6。when 90=toneindex=6。when 91 =toneindex=6。when 92 =toneindex=6。when 93 =toneindex=6。when 94 =toneindex=5。when 95 =toneindex=6。 when 96 =toneindex=8。 when 97 =toneindex=8。when 98=toneindex=8。 when 99 =toneindex=9。when 100 =toneindex=12。 when 101 =toneindex=12。when 102 =toneindex=10。 when 103 =toneindex=10。when 104 =toneindex=9。when 105 =toneindex=9。when 106 =toneindex=10。when 107 =toneindex=9。when 108 =toneindex=8。 when 109 =toneindex=8。when 110 =toneindex=6。 when 111 =toneindex=5。when 112 =toneindex=3。when 113 =toneindex=3。when 114 =toneindex=3。when 115 =toneindex=3。when 116 =toneindex=8。when 117 =toneindex=8。when 118 =toneindex=8。when 119 =toneindex=8。when 120 =toneindex=6。when 121 =toneindex=8。when 122 =toneindex=6。when 123 =toneindex=5。when 124 =toneindex=3。when 125=toneindex=6。when 126 =toneindex=8。when 127 =toneindex=5。when 128 =toneindex=5。when 129 =toneindex=5。when 130=toneindex=5。when 131 =toneindex=5。when 132 =toneindex=5。 when 133 =toneindex=5。when 134 =toneindex=5。when 135 =toneindex=5。when 136=toneindex=5。when 137 =toneindex=5。when 138 =toneindex=5。 WHEN OTHERS=NULL。 END CASE。 END PROCESS。END。三．系統(tǒng)以及各個模塊的仿真波形 表1 GW48CK開發(fā)系統(tǒng)工作模式：3接口名稱類型(輸入/輸出)引腳號說明Clk12mhz方波1分頻系統(tǒng)時鐘high高電平25高音顯示speakout方波3揚聲器輸出18 / 18