NAME

       weighted_sum - convert a group of bits to an integer

SYNOPSIS

       loadrt weighted_sum wsum_sizes=size[,size,...]

       Creates weighted sum groups each with the given number of input bits (size).

DESCRIPTION

       The  weighted_sum converts a group of bits to an integer. The conversion is the sum of the weights of the
       bits that are on plus any offset. The weight of the m-th bit is 2^m. This is similar to  a  binary  coded
       decimal  but  with  more  options.  The  hold  bit stops processing the input changes so the sum will not
       change.

       The default value for each weight is 2^m where m is the bit number. This results in a binary to  unsigned
       conversion.

       There is a limit of 8 weighted summers and each may have up to 16 input bits.

FUNCTIONS

       process_wsums (requires a floating point thread)
              Read all input values and update all output values.

PINS

       wsum.N.bit.M.in bit in
              The m'th input of weighted summer n.

       wsum.N.hold bit in
              When  TRUE,  the  sum  output  does  not change.  When FALSE, the sum output tracks the bit inputs
              according to the weights and offset.

       wsum.N.sum signed out
              The output of the weighted summer

       wsum.N.bit.M.weight signed rw
              The weight of the m'th input of weighted summer n.  The default value is 2^m.

       wsum.N.offset signed rw
              The offset is added to the weights corresponding to all TRUE inputs to give the final sum.

SEE ALSO

       scaled_s32_sums(9), sum2(9).

LinuxCNC Documentation                             2007-01-16                                    WEIGHTED_SUM(9)