18 lines
457 B
Plaintext
18 lines
457 B
Plaintext
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array dtmf-col 1209 freq>div , 1336 freq>div , 1477 freq>div ,
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array dtmf-row 697 freq>div , 770 freq>div , 852 freq>div , 941 freq>div ,
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( 0 1 2
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3 4 5
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6 7 8
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-3 -1 -2 )
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-2 const D*
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-1 const D#
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: dtmf ( digit -- f1 f2 ) 1-
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dup 0 < if abs 3 % 3 swap else 3 /mod then
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cells dtmf-col + @ swap cells dtmf-row + @ ;
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: dial ( digit -- ) dtmf 20 arp 7 sleep-csec ;
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: dialtone [ 350 freq>div lit 440 freq>div lit ] 200 arp ;
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