Fixed most compilation warnings and a delay issue

* Fixed most compilation warnings (Compiler warning level: All)
* Fixed a delay issue in enc_read function.

ubitx_20/cat_libs.ino

@@ -398,7 +398,7 @@ void ReadEEPRom_FT817(byte fromType)
 
 void WriteEEPRom_FT817(byte fromType)
 {
-  byte temp0 = CAT_BUFF[0];
+  //byte temp0 = CAT_BUFF[0];
   byte temp1 = CAT_BUFF[1];
 
   CAT_BUFF[0] = 0;

ubitx_20/cw_autokey.ino

@@ -208,10 +208,14 @@ void sendCWChar(char cwKeyChar)
         charLength = ((tmpChar >> 6) & 0x03) + 3;
         
         for (j = 0; j < charLength; j++)
-          sendBuff[j] = (tmpChar << j + 2) & 0x80;
+          sendBuff[j] = (tmpChar << (j + 2)) & 0x80;
 
         break;
       }
+      else
+      {
+        charLength = 0;
+      }
     }
   }
 
@@ -257,7 +261,7 @@ unsigned long scrollDispayTime = 0;
 #define scrollSpeed 500
 byte displayScrolStep = 0;
 
-int controlAutoCW(){
+void controlAutoCW(){
     int knob = 0;
     byte i;
 

ubitx_20/ubitx_20.ino

@@ -211,7 +211,7 @@ unsigned long vfoA=7150000L, vfoB=14200000L, sideTone=800, usbCarrier;
 unsigned long vfoA_eeprom, vfoB_eeprom; //for protect eeprom life
 unsigned long frequency, ritRxFrequency, ritTxFrequency;  //frequency is the current frequency on the dial
 
-int cwSpeed = 100; //this is actuall the dot period in milliseconds
+unsigned int cwSpeed = 100; //this is actuall the dot period in milliseconds
 extern int32_t calibration;
 
 //for store the mode in eeprom
@@ -320,8 +320,8 @@ void setNextHamBandFreq(unsigned long f, char moveDirection)
   loadMode = (byte)(resultFreq >> 30);
   resultFreq = resultFreq & 0x3FFFFFFF;
   
-  if ((resultFreq / 1000) < hamBandRange[findedIndex][0] || (resultFreq / 1000) > hamBandRange[findedIndex][1])
-    resultFreq = (unsigned long)(hamBandRange[findedIndex][0]) * 1000;
+  if ((resultFreq / 1000) < hamBandRange[(unsigned char)findedIndex][0] || (resultFreq / 1000) > hamBandRange[(unsigned char)findedIndex][1])
+    resultFreq = (unsigned long)(hamBandRange[(unsigned char)findedIndex][0]) * 1000;
 
   setFrequency(resultFreq);
   byteWithFreqToMode(loadMode);
@@ -422,8 +422,6 @@ void setTXFilters(unsigned long freq){
  */
  
 void setFrequency(unsigned long f){
-  uint64_t osc_f;
-
   //1 digits discarded
   f = (f / 50) * 50;
   
@@ -448,8 +446,6 @@ void setFrequency(unsigned long f){
  */
  
 void startTx(byte txMode, byte isDisplayUpdate){
-  unsigned long tx_freq = 0;
-
   //Check Hamband only TX //Not found Hamband index by now frequency
   if (tuneTXType >= 100 && getIndexHambanBbyFreq(ritOn ? ritTxFrequency :  frequency) == -1) {
     //no message
@@ -545,8 +541,6 @@ void checkPTT(){
 }
 
 void checkButton(){
-  int i, t1, t2, knob, new_knob;
-
   //only if the button is pressed
   if (!btnDown())
     return;
@@ -575,7 +569,7 @@ void checkButton(){
 void doTuning(){
   int s = 0;
   unsigned long prev_freq;
-  int incdecValue = 0;
+  long incdecValue = 0;
 
   if ((vfoActive == VFO_A && ((isDialLock & 0x01) == 0x01)) ||
     (vfoActive == VFO_B && ((isDialLock & 0x02) == 0x02)))
@@ -610,7 +604,7 @@ void doTuning(){
 
     if (incdecValue > 0 && frequency + incdecValue > HIGHEST_FREQ_DIAL)
         frequency = HIGHEST_FREQ_DIAL;      
-    else if (incdecValue < 0 && frequency < -incdecValue + LOWEST_FREQ_DIAL)  //for compute and compare based integer type.
+    else if (incdecValue < 0 && frequency < (unsigned long)(-incdecValue + LOWEST_FREQ_DIAL))  //for compute and compare based integer type.
       frequency = LOWEST_FREQ_DIAL;
     else
       frequency += incdecValue;
@@ -630,8 +624,6 @@ void doTuning(){
  * RIT only steps back and forth by 100 hz at a time
  */
 void doRIT(){
-  unsigned long newFreq;
- 
   int knob = enc_read();
   unsigned long old_freq = frequency;
 

ubitx_20/ubitx_menu.ino

@@ -13,7 +13,7 @@
 #define printLineF1(x) (printLineF(1, x))
 #define printLineF2(x) (printLineF(0, x))
 
-int menuBand(int btn){
+void menuBand(int btn){
   int knob = 0;
   int stepChangeCount = 0;
   byte btnPressCount = 0;
@@ -301,7 +301,7 @@ void menuExit(int btn){
   }
 }
 
-int menuCWSpeed(int btn){
+void menuCWSpeed(int btn){
     int knob = 0;
     int wpm;
 
@@ -356,7 +356,7 @@ int menuCWSpeed(int btn){
     menuOn = 0;
 }
 
-int menuCWAutoKey(int btn){
+void menuCWAutoKey(int btn){
     if (!btn){
      printLineF2(F("CW AutoKey Mode?"));
      return;
@@ -379,7 +379,7 @@ int menuCWAutoKey(int btn){
     menuOn = 0;
 }
 
-int menuSetupCwDelay(int btn){
+void menuSetupCwDelay(int btn){
     int knob = 0;
     int tmpCWDelay = cwDelayTime * 10;
      
@@ -427,7 +427,7 @@ int menuSetupCwDelay(int btn){
     menuOn = 0;
 }
 
-int menuSetupTXCWInterval(int btn){
+void menuSetupTXCWInterval(int btn){
     int knob = 0;
     int tmpTXCWInterval = delayBeforeCWStartTime * 2;
      
@@ -490,10 +490,8 @@ int menuSetupTXCWInterval(int btn){
 extern int32_t calibration;
 extern uint32_t si5351bx_vcoa;
 
-int factoryCalibration(int btn){
+void factoryCalibration(int btn){
   int knob = 0;
-  int32_t prev_calibration;
-
 
   //keep clear of any previous button press
   while (btnDown())
@@ -502,10 +500,9 @@ int factoryCalibration(int btn){
    
   if (!btn){
     printLineF2(F("Set Calibration?"));
-    return 0;
+    return;
   }
 
-  prev_calibration = calibration;
   calibration = 0;
 
   isUSB = true;
@@ -560,13 +557,13 @@ int factoryCalibration(int btn){
   delay(100);
 }
 
-int menuSetupCalibration(int btn){
+void menuSetupCalibration(int btn){
   int knob = 0;
   int32_t prev_calibration;
    
   if (!btn){
     printLineF2(F("Set Calibration?"));
-    return 0;
+    return;
   }
 
   printLineF1(F("Set to Zero-beat,"));

ubitx_20/ubitx_si5351.ino

@@ -62,7 +62,7 @@ void i2cWriten(uint8_t reg, uint8_t *vals, uint8_t vcnt) {  // write array
 
 
 void si5351bx_init() {                  // Call once at power-up, start PLLA
-  uint8_t reg;  uint32_t msxp1;
+  uint32_t msxp1;
   Wire.begin();
   i2cWrite(149, 0);                     // SpreadSpectrum off
   i2cWrite(3, si5351bx_clken);          // Disable all CLK output drivers

ubitx_20/ubitx_ui.ino

@@ -115,7 +115,7 @@ void drawMeter(int8_t needle){
 */
 
 // The generic routine to display one line on the LCD 
-void printLine(char linenmbr, char *c) {
+void printLine(unsigned char linenmbr, const char *c) {
   if (strcmp(c, printBuff[linenmbr])) {     // only refresh the display when there was a change
     lcd.setCursor(0, linenmbr);             // place the cursor at the beginning of the selected line
     lcd.print(c);
@@ -160,11 +160,11 @@ void printLineFromEEPRom(char linenmbr, char lcdColumn, byte eepromStartIndex, b
 }
 
 //  short cut to print to the first line
-void printLine1(char *c){
+void printLine1(const char *c){
   printLine(1,c);
 }
 //  short cut to print to the first line
-void printLine2(char *c){
+void printLine2(const char *c){
   printLine(0,c);
 }
 
@@ -312,9 +312,9 @@ int enc_read(void) {
   byte newState;
   int enc_speed = 0;
   
-  long stop_by = millis() + 50;
+  unsigned long start_at = millis();
   
-  while (millis() < stop_by) { // check if the previous state was stable
+  while (millis() - start_at < 50) { // check if the previous state was stable
     newState = enc_state(); // Get current state  
     
     if (newState != enc_prev_state)