commit e57004d0c3cae8ca5db3ca3eb2bcc7b9bc1d2534
author Thomas Tsou <tom@tsou.cc> Tue Aug 20 18:55:33 2013 -0400
committer Thomas Tsou <tom@tsou.cc> Fri Oct 18 13:10:17 2013 -0400
tree d904599229b143a6393be59a6bcf1a3a773a7601
parent 6aa1f18f41dd681c47b1fef3d590c40326a563d5

Transceiver52M: Generate RACH correlation sequence at initialization

There is no temporal dependency on when the RACH sequence is generated,
so there is no need for transceiver to create it in response to a
command from GSM core. If we power on the transceiver, we will need
the RACH sequence, so just allocate it during initialization.

Signed-off-by: Thomas Tsou <tom@tsou.cc>

Transceiver52M/Transceiver.cpp

diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp
index a7c629e..f09f036 100644
--- a/Transceiver52M/Transceiver.cpp
+++ b/Transceiver52M/Transceiver.cpp
@@ -501,7 +501,6 @@
         // Prepare for thread start
         mPower = -20;
         mRadioInterface->start();
-        generateRACHSequence(mSPS);
 
         // Start radio interface threads.
         mFIFOServiceLoopThread->start((void * (*)(void*))FIFOServiceLoopAdapter,(void*) this);

Transceiver52M/runTransceiver.cpp

diff --git a/Transceiver52M/runTransceiver.cpp b/Transceiver52M/runTransceiver.cpp
index dc2ebc6..f268752 100644
--- a/Transceiver52M/runTransceiver.cpp
+++ b/Transceiver52M/runTransceiver.cpp
@@ -160,6 +160,9 @@
 
   Transceiver *trx = new Transceiver(trxPort, trxAddr.c_str(),
                                      SAMPSPERSYM, GSM::Time(3,0), radio);
+  if (!trx->init()) {
+    LOG(ALERT) << "Failed to initialize transceiver";
+  }
   trx->receiveFIFO(radio->receiveFIFO());
   trx->start();
 

Transceiver52M/sigProcLib.cpp

diff --git a/Transceiver52M/sigProcLib.cpp b/Transceiver52M/sigProcLib.cpp
index 9ad149f..2ccc714 100644
--- a/Transceiver52M/sigProcLib.cpp
+++ b/Transceiver52M/sigProcLib.cpp
@@ -244,11 +244,21 @@
   }
 }
 
-void sigProcLibSetup(int sps)
+bool sigProcLibSetup(int sps)
 {
+  if ((sps != 0) && (sps != 2) && (sps != 4))
+    return false;
+
   initTrigTables();
   initGMSKRotationTables(sps);
   generateGSMPulse(sps, 2);
+
+  if (!generateRACHSequence(sps)) {
+    sigProcLibDestroy();
+    return false;
+  }
+
+  return true;
 }
 
 void GMSKRotate(signalVector &x) {

Transceiver52M/sigProcLib.h

diff --git a/Transceiver52M/sigProcLib.h b/Transceiver52M/sigProcLib.h
index a9fabb0..ee152d5 100644
--- a/Transceiver52M/sigProcLib.h
+++ b/Transceiver52M/sigProcLib.h
@@ -100,7 +100,7 @@
 float vectorPower(const signalVector &x);
 
 /** Setup the signal processing library */
-void sigProcLibSetup(int sps);
+bool sigProcLibSetup(int sps);
 
 /** Destroy the signal processing library */
 void sigProcLibDestroy(void);