## Initialize variables
OPTION_VERBOSE=""; OPTION_ENCRYPT=""; OPTION_COMPRESS=""; OPTION_TMPDIR="";
-errResetx10e3=0; BUFFER_TTL_ADJ_FLOAT="";
+errReset=0; BUFFER_TTL_ADJ_FLOAT="";
### PID Control factors
-K_P=10; # Gain for compensating buffer round lag
-T_I=2; # Consider this number of past buffer rounds to eliminate error
+K_P=1; # Gain for compensating buffer round lag
+T_I=1000; # Consider this number of past buffer rounds to eliminate error
T_D=1; # Predict value this number of buffer rounds into the future
#===BEGIN Declare local script functions===
# Calculate Error, errNS, in nanoseconds
## Get current time
- timeBufferStartNS="$(timeEpochNS)" && vbm "timeBufferStartNS:$timeBufferStartNS";
+ timeBufferStartNS="$(timeEpochNS)" && vbm "timeBufferStartNS :$timeBufferStartNS";
## Calculate expected time (from start time, current buffer round number, nominal BUFFER_TTL)
timeBufferStartNSExp="$(( (timeBufferFirstNS) + (BUFFER_TTL_NS * bufferRound) ))" && vbm "timeBufferStartNSExp:$timeBufferStartNSExp";
## Calculate error (diff between timeBufferStartNSExp and timeBufferStartNS; usually negative)
errNS="$(( timeBufferStartNSExp - timeBufferStartNS ))" && vbm "errNS:$errNS";
- errNSx10e3="$((errNS*10**3))" && vbm "errNSx10e3:$errNSx10e3";
+# errNSx10e3="$((errNS*10**3))" && vbm "errNSx10e3:$errNSx10e3";
# ## Append error to errorHistory
# errorHistory+=("errNS");
# ### Trim errorHistory array if over errorHistorySize
# for value in "${errorHistory[@]}"; do
# errReset=$(( errReset + ( value*BUFFER_TTL_NS ) ));
# done;
- errResetx10e3="$(( ( errResetx10e3 + ( errNSx10e3 * BUFFER_TTL_NS ) )*10**3 ))" && vbm "errResetx10e3:$errResetx10e3";
+ errReset="$(( (errReset + (errNS*BUFFER_TTL_NS)) ))" && vbm "errResetTerm:$errResetTerm";
+# errResetx10e3="$(( ( errResetx10e3 + ( errNSx10e3 * BUFFER_TTL_NS ) )*10**3 ))" && vbm "errResetx10e3:$errResetx10e3";
- # Calculate errRate in nanoseconds per 1000 nanoseconds
- errRatex10e3="$(( ( errNSx10e3 ) / BUFFER_TTL_NS ))" && vbm "errRatex10e3:$errRatex10e3";
+ # Calculate errRate in nanoseconds per nanosecond
+ errRate="$(( errNS / BUFFER_TTL_NS ))" && vbm "errRateTerm:$errRateTerm";
+# errRatex10e3="$(( ( errNSx10e3 ) / BUFFER_TTL_NS ))" && vbm "errRatex10e3:$errRatex10e3";
# Calculate PID control signal
## ADJ = K_P * (errNS + errReset/T_I + errRate*T_D)
- ADJ="$((K_P*(errNSx10e3 + (errResetx10e3/T_I) + (errRatex10e3*T_D) )/(10**3)))" && vbm "ADJ:$ADJ";
+ ADJ="$(( K_P*(errNS + errReset/T_I + errRate*T_D) ))" && vbm "ADJ:$ADJ";
+# ADJ="$((K_P*(errNSx10e3 + (errResetx10e3/T_I) + (errRatex10e3*T_D) )/(10**3)))" && vbm "ADJ:$ADJ";
# Calculate BUFFER_TTL_ADJ_FLOAT from ADJ (ns)
## Calculate BUFFER_TTL_ADJ in nanoseconds (BUFFER_TTL_ADJ_NS = BUFFER_TTL_NS + ADJ)