mirror of https://github.com/saitohirga/WSJT-X.git
23 lines
398 B
Fortran
23 lines
398 B
Fortran
subroutine get_crc14(mc,ncrc)
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character c14*14
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integer*1 mc(68),r(15),p(15)
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integer ncrc
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! polynomial for 14-bit CRC 0x6757
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data p/1,1,0,0,1,1,1,0,1,0,1,0,1,1,1/
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! divide by polynomial
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r=mc(1:15)
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do i=0,53
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r(15)=mc(i+15)
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r=mod(r+r(1)*p,2)
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r=cshift(r,1)
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enddo
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write(c14,'(14b1)') r(1:14)
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read(c14,'(b14.14)') ncrc
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! mc(55:68)=r(1:14)
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end subroutine get_crc14
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