Add peek and overflow

Author: nseidle

libraries/SoftwareSerial/src/SoftwareSerial.cpp

@@ -42,7 +42,7 @@ uint8_t gSoftwareSerialNumObjs = 0;
 SoftwareSerial *ap3_serial_handle = 0;
 
 //Uncomment to enable debug pulses and Serial.prints
-#define DEBUG
+//#define DEBUG
 
 #ifdef DEBUG
 #define SS_DEBUG_PIN 8
@@ -168,7 +168,7 @@ int SoftwareSerial::available()
   return (rxBufferHead + AP3_SS_BUFFER_SIZE - rxBufferTail) % AP3_SS_BUFFER_SIZE;
 }
 
-uint8_t SoftwareSerial::read()
+int SoftwareSerial::read()
 {
   if (available() == 0) return (-1);
 
@@ -177,6 +177,28 @@ uint8_t SoftwareSerial::read()
   return (rxBuffer[rxBufferTail]);
 }
 
+int SoftwareSerial::peek()
+{
+  if (available() == 0) return (-1);
+
+  uint8_t tempTail = rxBufferTail + 1;
+  tempTail %= AP3_SS_BUFFER_SIZE;
+  return (rxBuffer[tempTail]);
+}
+
+//Returns true if overflow flag is set
+//Clears flag when called
+bool SoftwareSerial::overflow()
+{
+  if (_rxBufferOverflow)
+  {
+    _rxBufferOverflow = false;
+    return (true);
+  }
+  return (false);
+
+}
+
 ap3_err_t SoftwareSerial::softwareserialSetConfig(HardwareSerial_Config_e SSconfig)
 {
   ap3_err_t retval = AP3_OK;

libraries/SoftwareSerial/src/SoftwareSerial.h

@@ -51,7 +51,10 @@ class SoftwareSerial
 
   ap3_err_t softwareserialSetConfig(HardwareSerial_Config_e SSconfig);
   int available();
-  uint8_t read();
+  int read();
+  int peek();
+  bool overflow();
+
 
   void rxBit(void);
   void endOfByte(void);