zephyrSerial: Add one more print variant

This variant is capable of printing numbers and according to the base parameter.
For eg. Serial.print(78, DEC) will print the decimal equivalent of 78 and
Serial.print(78, HEX)  will print HEX and so on.

Signed-off-by: Dhruva Gole <[email protected]>

Author: DhruvaG2000

cores/arduino/zephyrSerial.cpp

@@ -24,6 +24,22 @@ size_t arduino::ZephyrSerial::print(char ch){
     return print_char(ch, false);
 }
 
+size_t arduino::ZephyrSerial::print(const int val, const int base) {
+    if (base == 2) {   /* Todo: print Binary */
+        printk("%d", val);
+    }   else if (base == 16) {  /* print Hex value */
+        printk("%x",val);
+    }   else if (base == 8) {   /* Todo: print octal value */
+        printk("%x", val);
+    }   else if (base == 10) {  /* print decimal value */
+        printk("%d", val);
+    }   else {
+        return EINVAL;
+    }
+
+    return 1;   /* Always return 1 byte */
+}
+
 size_t arduino::ZephyrSerial::println(char ch){
     return print_char(ch, true);
 }

cores/arduino/zephyrSerial.h

@@ -22,6 +22,8 @@ class ZephyrSerial {
 
     size_t print(const char c);
     size_t print(const char * ptr);
+    size_t print(const int val, const int base);
+
     size_t println(const char c);
     size_t println(const char* ptr);
     size_t println(void);