sandbox/iirdes_test: improving help file
@@ -17,17 +17,17 @@ void usage()
{
printf("iirdes_example -- infinite impulse response filter design\n");
printf("options (default values in []):\n");
- printf(" u/h : print usage/help\n");
- printf(" t : filter type: [butter], cheby1, cheby2, ellip, bessel\n");
- printf(" b : filter transformation: [LP], HP, BP, BS\n");
- printf(" n : filter order, n > 0 [5]\n");
- printf(" r : passband ripple in dB (cheby1, ellip), r > 0 [1.0]\n");
- printf(" s : stopband attenuation in dB (cheby2, ellip), s > 0 [60.0]\n");
- printf(" f : passband cut-off, 0 < f < 0.5 [0.2]\n");
- printf(" c : center frequency (BP, BS cases), 0 < c < 0.5 [0.25]\n");
- printf(" o : format [sos], tf\n");
- printf(" sos : second-order sections form\n");
- printf(" tf : regular transfer function form (potentially\n");
+ printf(" -h : print usage/help\n");
+ printf(" -t <type> : filter type: [butter], cheby1, cheby2, ellip, bessel\n");
+ printf(" -b <type> : filter transformation: [LP], HP, BP, BS\n");
+ printf(" -n <order> : filter order, n > 0 [5]\n");
+ printf(" -r <ripple> : passband ripple in dB (cheby1, ellip), r > 0 [1.0]\n");
+ printf(" -s <atten> : stopband attenuation in dB (cheby2, ellip), s > 0 [60.0]\n");
+ printf(" -f <freq> : passband cut-off, 0 < f < 0.5 [0.2]\n");
+ printf(" -c <freq> : center frequency (BP, BS cases), 0 < c < 0.5 [0.25]\n");
+ printf(" -o <format> : format [sos], tf\n");
+ printf(" sos - second-order sections form\n");
+ printf(" tf - regular transfer function form (potentially\n");
printf(" unstable for large orders\n");
}
