diff options
Diffstat (limited to 'host/lib')
| -rw-r--r-- | host/lib/rfnoc/siggen_block_control.cpp | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/host/lib/rfnoc/siggen_block_control.cpp b/host/lib/rfnoc/siggen_block_control.cpp index 7fbe79337..2628d66ab 100644 --- a/host/lib/rfnoc/siggen_block_control.cpp +++ b/host/lib/rfnoc/siggen_block_control.cpp @@ -307,16 +307,16 @@ private: // The rotator that rotates the phasor to generate the sinusoidal // data has an initial phase offset which is impossible to predict. // Thus, the Cartesian parameter is largely immaterial, as long as - // the phasor's amplitude matchines with the client has specified. + // the phasor's amplitude matches what the client has specified. // For simplicity, the Cartesian parameter is chosen to have a real - // (X) component of 0.0 and an imaginary (Y) component of the desired - // amplitude. - const int16_t cartesian_i_fp = clamp<int16_t>(amplitude * 32767.0); - - // Bits 31:16 represent the imaginary component (the pre-scaled - // fixed point amplitude), while bits 15:0 represents the real - // component (which are zeroed). - const uint32_t cartesian_reg_value = (uint32_t(cartesian_i_fp) << 16); + // (X) component of the desired amplitude and an imaginary (Y) + // component of 0.0. + const int16_t cartesian_x_fp = clamp<int16_t>(amplitude * 32767.0); + + // Bits 31:16 represent the real component (the pre-scaled fixed-point + // amplitude), while bits 15:0 represent the imaginary component (which + // is zeroed). + const uint32_t cartesian_reg_value = (uint32_t(cartesian_x_fp) << 16); _siggen_reg_iface.poke32(REG_CARTESIAN_OFFSET, cartesian_reg_value, port); } |