Add Serial library

include/SerialCmd.h

@@ -0,0 +1,16 @@
+#ifndef SERIALCMD_H
+#define SERIALCMD_H
+
+#include <stdint.h>
+
+int SerialCmd_readFromSerial (void);
+
+void SerialCmd_clearCmdArray (void);
+
+int SerialCmd_checkCmdArrayForPrefix (void);
+
+uint32_t SerialCmd_parseColor(int startOffset);
+
+char SerialCmd_type(void);
+
+#endif /* SERIALCMD_H */

src/SerialCmd.cpp

@@ -0,0 +1,114 @@
+
+#include "SerialCmd.h"
+#include "ColorUtil.h"
+#include <Arduino.h>
+
+
+// Serial fields
+#define CMD_MAX     128
+
+static char myCmd[CMD_MAX];
+
+/**
+ * @brief 
+ * number of read bytes
+ * @return int 
+ */
+int SerialCmd_readFromSerial (void)
+{
+  //read from the serial buffer and flush
+  int inputSize = Serial.available();
+  
+  //give serial a chance to receive all bytes
+  if(inputSize > 0){
+    delay(100);
+    inputSize = Serial.available();
+  }
+  
+  if(inputSize > 0 && inputSize < CMD_MAX)
+  {
+    Serial.print("inputSize: ");
+    Serial.print(inputSize);
+    for (int i = 0; i < inputSize; i++){
+      myCmd[i] = Serial.read();
+    }
+  }
+  else if(inputSize >= CMD_MAX)
+  {
+    Serial.flush();
+    Serial.print("too much data, flush");
+  }
+  return inputSize;
+}
+
+/**
+ * @brief 
+ * clear the cmd array
+ */
+void SerialCmd_clearCmdArray(void)
+{
+  for (int i = 0; i < CMD_MAX; i++)
+  {
+    myCmd[i] = '\0';
+  }
+}
+
+/**
+ * @brief 
+ * check if command has the required prefix
+ * @return int 
+ */
+int SerialCmd_checkCmdArrayForPrefix (void)
+{
+   if (myCmd[0] == 'o'
+     && myCmd[1] == 'l'
+     && myCmd[2] == 'l'
+     && myCmd[3] == 'p'
+     && myCmd[4] == 'e')
+    {
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+char SerialCmd_type(void)
+{
+    if (SerialCmd_checkCmdArrayForPrefix())
+    {
+        return myCmd[5];
+    }
+    else
+    {
+        return '\0';
+    }
+}
+
+uint32_t SerialCmd_parseColor(int startOffset)
+{
+  unsigned int colorParts[3]; /* 0: red, 1: green, 2: blue */
+  unsigned int colorSum = 0;
+
+  if (startOffset > (CMD_MAX - sizeof(colorParts)))
+  {
+    return 0;
+  }
+
+  for (int i=0; i < (2*3); i+= 2)
+  {
+    colorParts[i/2] = (myCmd[i+startOffset] <= '9') ? ((myCmd[i+startOffset]-'0') << 4) : (((myCmd[i+startOffset]-'A')+10) << 4);
+    if (colorParts[i/2] < 0)
+    {
+        Serial.print("calcErr:"); 
+        Serial.println(colorParts[i/2]);
+    }
+    colorParts[i/2] += ( (myCmd[i+startOffset+1] <= '9') ? (myCmd[i+startOffset+1]-'0') : (((myCmd[i+startOffset+1]-'A')+10)) );
+  }
+  int r = colorParts[0]; /* fill red */
+  int g = colorParts[1]; /* fill green */
+  int b = colorParts[2]; /* fill blue */
+
+  return Color(r, g, b);
+}