id: rylr998_css_mod
label: RYLR998 CSS Modulator
category: '[RYLR998]/Modulation'
flags: [python, cpp]

documentation: |-
  CSS (Chirp Spread Spectrum) modulator for LoRa signals.

  Generates chirp signals from integer bin values. Each bin value
  (0 to 2^SF - 1) encodes SF bits into the starting frequency of an upchirp.

  Input: Integer bin values
  Output: Complex IQ samples at the specified sample rate

templates:
  imports: from rylr998 import css_mod
  make: rylr998.css_mod(sf=${sf}, sample_rate=${sample_rate})

parameters:
  - id: sf
    label: Spreading Factor
    dtype: int
    default: 9
    options: [7, 8, 9, 10, 11, 12]
    option_labels: ['SF7', 'SF8', 'SF9', 'SF10', 'SF11', 'SF12']

  - id: sample_rate
    label: Sample Rate (Hz)
    dtype: real
    default: 125e3

  - id: bw
    label: Bandwidth (Hz)
    dtype: real
    default: 125e3

inputs:
  - label: in
    domain: message
    dtype: int

outputs:
  - label: out
    domain: stream
    dtype: complex

file_format: 1