Move log output to second core

Outputting the log over serial was taking too long and usually
two packets were missed.

Moving it to the second core free the first core to capture all
packets.

There could be a race condition with the logging between the two cores,
a mutex has been added but hasn't been used.

src/sniffer/lib/QuokkADB/include/log_cache.h

@@ -104,5 +104,5 @@ inline void dbgmsg(Params... params)
         log_raw("\r\n");
     }
 }
-
+void log_init();
 void log_poll();

src/sniffer/lib/QuokkADB/src/log_cache.cpp

@@ -2,7 +2,9 @@
 #include "log_cache.h"
 #include <stdarg.h>
 #include <pico/stdio.h>
+#include <pico/mutex.h>
 
+static mutex log_mutex;
 // This memory buffer can be read by debugger and is also saved to zululog.txt
 #define LOGBUFMASK (LOGBUFSIZE - 1)
 
@@ -117,6 +119,11 @@ void log_raw(bytearray array)
     }
 }
 
+void log_init()
+{
+    mutex_init(&log_mutex);
+}
+
 uint32_t log_get_buffer_len()
 {
     return g_logpos;

src/sniffer/lib/QuokkADB/src/quokkadb.cpp

@@ -69,6 +69,12 @@ ADBKbdRptParser KeyboardPrs;
 ADBMouseRptParser MousePrs(KeyboardPrs);
 FlashSettings setting_storage;
 
+void initVariant() 
+{
+  log_init();
+  logmsg("---- Cache Logging Initialized ----");
+}
+
 /*------------ Core0 setup ------------*/
 void setup()
 {
@@ -104,7 +110,6 @@ void loop()
     usb_reset = true;
     Logmsg.println("ALL: Resetting devices");
   } 
-  log_poll();
 }
 
 
@@ -118,5 +123,5 @@ void setup1()
 /*------------ Core1 main loop ------------*/
 void loop1()
 {
-
+   log_poll();
 }

src/sniffer/lib/adb/include/adb.h

@@ -30,7 +30,7 @@
 #include <log_cache.h>
 
 #ifndef ADB_START_BIT_DELAY
-#define ADB_START_BIT_DELAY 100000
+#define ADB_START_BIT_DELAY 20000
 #endif
 
 #define KBD_DEFAULT_ADDR 0x02
@@ -205,11 +205,16 @@ inline int32_t AdbInterface::Snoop16bitRegister(void)
 
   // stop bit
   low_time = wait_data_hi(130);
-  if (!low_time || low_time > 70)
-  {  
+  if (!low_time || low_time < 40 )
+  { 
+    logmsg("---- Error: No stop bit. Low time (us): ", low_time); 
     return -4;
   }
-
+  else if(low_time < 70)
+  {
+    logmsg("---- Stop bit");
+  }
+  logmsg("---- End 16 bit snoop");
   return data;
 out:
   return -5;