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Fix frequency accumulation

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This commit is contained in:
Miroslav Lichvar 2010-04-21 10:29:04 +02:00
parent bc29c84610
commit 99d18abf59
2 changed files with 4 additions and 6 deletions
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8
local.c
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@ -378,7 +378,7 @@ LCL_SetAbsoluteFrequency(double afreq_ppm)
(*drv_set_freq)(afreq_ppm);
dfreq = 1.0e-6 * (afreq_ppm - current_freq_ppm) / (1.0 - 1.0e-6 * current_freq_ppm);
dfreq = (afreq_ppm - current_freq_ppm) / (1.0e6 + current_freq_ppm);
LCL_ReadRawTime(&raw);
LCL_CookTime(&raw, &cooked, NULL);
@ -404,8 +404,7 @@ LCL_AccumulateDeltaFrequency(double dfreq)
are handled in units of ppm, whereas the 'dfreq' argument is in
terms of the gradient of the (offset) v (local time) function. */
current_freq_ppm = (1.0 - dfreq) * current_freq_ppm +
(1.0e6 * dfreq);
current_freq_ppm = (1.0 + dfreq) * current_freq_ppm + 1.0e6 * dfreq;
/* Call the system-specific driver for setting the frequency */
(*drv_set_freq)(current_freq_ppm);
@ -485,8 +484,7 @@ LCL_AccumulateFrequencyAndOffset(double dfreq, double doffset)
/* Work out new absolute frequency. Note that absolute frequencies
are handled in units of ppm, whereas the 'dfreq' argument is in
terms of the gradient of the (offset) v (local time) function. */
current_freq_ppm = (1.0 - dfreq) * old_freq_ppm +
(1.0e6 * dfreq);
current_freq_ppm = (1.0 + dfreq) * old_freq_ppm + 1.0e6 * dfreq;
#ifdef TRACEON
LOG(LOGS_INFO, LOGF_Local, "old_freq=%.3fppm new_freq=%.3fppm offset=%.6fsec",

2
rtc_linux.c
View file

@ -314,7 +314,7 @@ slew_samples
double old_seconds_fast, old_gain_rate;
new_freq = 1.0e-6 * afreq_ppm;
old_freq = (new_freq - dfreq) / (1.0 - dfreq);
old_freq = (new_freq - dfreq) / (1.0 + dfreq);
for (i=0; i<n_samples; i++) {
UTI_DiffTimevalsToDouble(&elapsed, cooked, system_times + i);