idsp

Function cossin

source 
pub fn cossin(phase: i32) -> (i32, i32)
Expand description

Compute the cosine and sine of an angle. This is ported from the MiSoC cossin core. https://github.com/m-labs/misoc/blob/master/misoc/cores/cossin.py

§Arguments

  • phase - 32-bit phase where i32::MIN is -π and i32::MAX is π

§Returns

The cos and sin values of the provided phase as a (i32, i32) tuple. With a 7-bit deep LUT there is 9e-6 max and 4e-6 RMS error in each quadrature over 20 bit phase.