allow to set a read only mode for config items, output compiler messages for overwritten configs, add m5 gps unit defs

lib/config/GWConfig.cpp

@@ -1,3 +1,4 @@
+#define CFG_MESSAGES
 #include "GWConfig.h"
 #include <ArduinoJson.h>
 #include <string.h>
@@ -159,20 +160,20 @@ void GwConfigHandler::toHex(unsigned long v, char *buffer, size_t bsize)
         buffer[2 * i] = 0;
 }
 
-std::vector<String> GwConfigHandler::getHidden() const{
+std::vector<String> GwConfigHandler::getSpecial() const{
     std::vector<String> rt;
-    rt.reserve(numHidden());
+    rt.reserve(numSpecial());
     for (int i=0L;i<getNumConfig();i++){
-        if (configs[i]->isHidden()){
+        if (configs[i]->getType() != GwConfigInterface::NORMAL){
             rt.push_back(configs[i]->getName());
         };
     }
     return rt;
 }
-int GwConfigHandler::numHidden() const{
+int GwConfigHandler::numSpecial() const{
     int rt=0;
     for (int i=0L;i<getNumConfig();i++){
-        if (configs[i]->isHidden()) rt++;
+        if (configs[i]->getType() != GwConfigInterface::NORMAL) rt++;
     }
     return rt;
 }

lib/config/GWConfig.h

@@ -30,8 +30,8 @@ class GwConfigHandler: public GwConfigDefinitions{
         int getInt(const String name,int defaultv=0) const;
         GwConfigInterface * getConfigItem(const String name, bool dummy=false) const;
         bool checkPass(String hash);
-        std::vector<String> getHidden() const;
-        int numHidden() const;
+        std::vector<String> getSpecial() const;
+        int numSpecial() const;
         /**
          * change the value of a config item
          * will become a noop after stopChanges has been called 

lib/config/GwConfigItem.h

@@ -5,19 +5,25 @@
 
 class GwConfigHandler;
 class GwConfigInterface{
+    public:
+        typedef enum {
+            NORMAL=0,
+            HIDDEN=1,
+            READONLY=2
+        } ConfigType;
     private:
         String name;
         const char * initialValue;
         String value;
         bool secret=false;
-        bool hidden=false;
+        ConfigType type=NORMAL;
     public:
-        GwConfigInterface(const String &name, const char * initialValue, bool secret=false, bool hidden=false){
+        GwConfigInterface(const String &name, const char * initialValue, bool secret=false,ConfigType type=NORMAL){
             this->name=name;
             this->initialValue=initialValue;
             this->value=initialValue;
             this->secret=secret;
-            this->hidden=hidden;
+            this->type=type;
         }
         virtual String asString() const{
             return value;
@@ -43,8 +49,8 @@ class GwConfigInterface{
         String getDefault() const {
             return initialValue;
         }
-        bool isHidden() const {
-            return hidden;
+        ConfigType getType() const {
+            return type;
         }
         friend class GwConfigHandler;
 };
@@ -67,5 +73,7 @@ class GwNmeaFilter{
         String toString();    
 };
 
-
+#define __XSTR(x) __STR(x)
+#define __STR(x) #x
+#define __MSG(x) _Pragma (__STR(message (x)))
 #endif

lib/hardware/GwHardware.h

@@ -17,7 +17,7 @@
 #define GWSERIAL_TYPE_BI 2
 #define GWSERIAL_TYPE_RX 3
 #define GWSERIAL_TYPE_TX 4
-
+#include <GwConfigItem.h>
 #include <HardwareSerial.h>
 #include "GwUserTasks.h"
 
@@ -148,8 +148,8 @@
 #ifdef M5_GPS_KIT 
   #define GWSERIAL_RX BOARD_LEFT1
   #define GWSERIAL_TYPE GWSERIAL_TYPE_RX
-  #define CFGGDEFAULT_serialBaud "9600"
-  #define CFGHIDE_serialBaud
+  #define CFGDEFAULT_serialBaud "9600"
+  #define CFGMODE_serialBaud GwConfigInterface::READONLY
 #endif
 
 //below we define the final device config based on the above
@@ -181,6 +181,21 @@
   #endif
 #endif
 
+//http://docs.m5stack.com/en/unit/gps
+#ifdef M5_GPS_UNIT
+  #ifdef GWSERIAL_TYPE
+    #define GWSERIAL2_RX GROOVE_PIN_2
+    #define GWSERIAL2_TYPE GWSERIAL_TYPE_RX
+    #define CFGDEFAULT_serialBaud "9600"
+    #define CFGMODE_serialBaud GwConfigInterface::READONLY
+  #else
+    #define GWSERIAL_RX GROOVE_PIN_2
+    #define GWSERIAL_TYPE GWSERIAL_TYPE_RX
+    #define CFGDEFAULT_serial2Baud "9600"
+    #define CFGMODE_serial2Baud GwConfigInterface::READONLY
+  #endif 
+#endif
+
 //can kit for M5 Atom
 #ifdef M5_CAN_KIT
   #define ESP32_CAN_TX_PIN BOARD_LEFT1