【文章內(nèi)容簡介】 =0110。when 51=toneindex2=0111。when 52=toneindex2=1001。when 53=toneindex2=1001。when 54=toneindex2=0101。when 55=toneindex2=0110。when 56=toneindex2=0101。when 57=toneindex2=0100。when 58=toneindex2=0011。when 59=toneindex2=0011。when 60=toneindex2=0000。when 61=toneindex2=0000。when 62=toneindex2=0101。when 63=toneindex2=0110。when 64=toneindex2=0101。when 65=toneindex2=0101。when 66=toneindex2=1011。when 67=toneindex2=1011。when 68=toneindex2=1001。when 69=toneindex2=1001。when 70=toneindex2=0101。when 71=toneindex2=0110。when 72=toneindex2=0101。when 73=toneindex2=0101。when 74=toneindex2=1011。when 75=toneindex2=1011。when 76=toneindex2=1001。when 77=toneindex2=1001。when 78=toneindex2=0101。when 79=toneindex2=0110。when 80=toneindex2=0111。when 81=toneindex2=0111。when 82=toneindex2=0111。when 83=toneindex2=0111。when 84=toneindex2=1001。when 85=toneindex2=1010。when 86=toneindex2=1011。when 87=toneindex2=1011。when 88=toneindex2=1100。when 89=toneindex2=1011。when 90=toneindex2=1010。when 91=toneindex2=1010。when 92=toneindex2=0000。when 93=toneindex2=0000。when 94=toneindex2=0010。when 95=toneindex2=0011。when 96=toneindex2=0100。when 97=toneindex2=0100。when 98=toneindex2=1010。when 99=toneindex2=1010。when 100=toneindex2=0111。when 101=toneindex2=0111。when 102=toneindex2=0010。when 103=toneindex2=0011。when 104=toneindex2=0100。when 105=toneindex2=0100。when 106=toneindex2=1010。when 107=toneindex2=1010。when 108=toneindex2=0111。when 109=toneindex2=0111。when 110=toneindex2=0111。when 111=toneindex2=0110。when 112=toneindex2=0101。when 113=toneindex2=0101。when 114=toneindex2=0101。when 115=toneindex2=0101。when 116=toneindex2=0110。when 117=toneindex2=0110。when 118=toneindex2=0111。when 119=toneindex2=0111。when 120=toneindex2=1010。when 121=toneindex2=1010。when 122=toneindex2=1010。when 123=toneindex2=1010。when 124=toneindex2=1010。when 125=toneindex2=1010。when 126=toneindex2=0101。when 127=toneindex2=0101。when 128=toneindex2=1001。when 129=toneindex2=1001。when 130=toneindex2=0000。when 131=toneindex2=0000。when 132=toneindex2=0000。when 133=toneindex2=0000。when 134=toneindex2=0000。when 135=toneindex2=0000。when 136=toneindex2=0000。when 137=toneindex2=0000。when 138=toneindex2=0000。when others=null。end case。end process。end one。library ieee。use 。entity tone isport(key:in std_logic_vector(6 downto 0)。toneindex1:out std_logic_vector(3 downto 0))。end。architecture one of tone isbeginsearch:process(key)begin case key iswhen0000001=toneindex1=0001。when0000010=toneindex1=0010。when0000100=toneindex1=0011。when0001000=toneindex1=0100。when0010000=toneindex1=0101。when0100000=toneindex1=0110。