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Code cleanup.

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This commit is contained in:
Joe Taylor 2019-01-30 11:20:29 -05:00
parent e57df307dd
commit 2888c05eff
1 changed files with 17 additions and 12 deletions
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29
lib/ft4/genft4.f90
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@ -1,6 +1,5 @@
subroutine genft4(msg0,ichk,msgsent,i4tone) subroutine genft4(msg0,ichk,msgsent,i4tone)
! s16 + 87symbols + 2 ramp up/down = 105 channel symbols 4.48s message duration
! s4+58symb+s4+58symb+s4+58sym+s4
! Encode an FT4 message ! Encode an FT4 message
! Input: ! Input:
! - msg0 requested message to be transmitted ! - msg0 requested message to be transmitted
@ -8,7 +7,13 @@ subroutine genft4(msg0,ichk,msgsent,i4tone)
! - msgsent message as it will be decoded ! - msgsent message as it will be decoded
! - i4tone array of audio tone values, {0,1,2,3} ! - i4tone array of audio tone values, {0,1,2,3}
! use iso_c_binding, only: c_loc,c_size_t ! Frame structure:
! s16 + 87symbols + 2 ramp up/down = 105 total channel symbols
! r1 + s4 + d29 + s4 + d29 + s4 + d29 + s4 + r1
! Message duration: TxT = 105*512/12000 = 4.48 s
! use iso_c_binding, only: c_loc,c_size_t
use packjt77 use packjt77
include 'ft4_params.f90' include 'ft4_params.f90'
@ -20,9 +25,8 @@ subroutine genft4(msg0,ichk,msgsent,i4tone)
integer*1 codeword(2*ND) integer*1 codeword(2*ND)
integer*1 msgbits(77) integer*1 msgbits(77)
integer icos4(4) integer icos4(4)
data icos4/0,1,3,2/
logical unpk77_success logical unpk77_success
data icos4/0,1,3,2/
message=msg0 message=msg0
@ -60,12 +64,13 @@ subroutine genft4(msg0,ichk,msgsent,i4tone)
if(is.eq.3) itmp(i)=2 if(is.eq.3) itmp(i)=2
enddo enddo
i4tone(1:4)=icos4 i4tone(1:4)=icos4
i4tone(5:33)=itmp(1:29) i4tone(5:33)=itmp(1:29)
i4tone(34:37)=icos4 i4tone(34:37)=icos4
i4tone(38:66)=itmp(30:58) i4tone(38:66)=itmp(30:58)
i4tone(67:70)=icos4 i4tone(67:70)=icos4
i4tone(71:99)=itmp(59:87) i4tone(71:99)=itmp(59:87)
i4tone(100:103)=icos4 i4tone(100:103)=icos4
999 return 999 return
end subroutine genft4 end subroutine genft4