add gpio and rtc function

NexGpio.cpp

@@ -0,0 +1,105 @@
+/**
+ * @file NexGpio.cpp
+ *
+ * The implementation of class NexGpio. 
+ *
+ * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
+ * @date    2015/8/13
+ * @copyright 
+ * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+#include "NexGpio.h"
+
+bool NexGpio::pin_mode(uint32_t port,uint32_t mode,uint32_t control_id)
+{
+    char buf;
+    String cmd;
+    
+    cmd += "cfgpio ";
+    buf = port + '0';
+    cmd += buf;
+    cmd += ',';
+    buf = mode + '0';
+    cmd += buf;
+    cmd += ',';
+    buf = control_id = '0';
+    cmd += buf;
+
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();
+    
+}
+
+bool NexGpio::digital_write(uint32_t port,uint32_t value)
+{
+    String cmd;
+    char buf;
+    
+    cmd += "pio";
+    buf = port + '0';
+    cmd += buf;
+    cmd += '=';
+    buf = value + '0';
+    cmd += buf;
+    
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();
+}
+
+uint32_t NexGpio::digital_read(uint32_t port)
+{
+    uint32_t number;
+    char buf;
+    
+    String cmd = String("get ");
+    cmd += "pio";
+    buf = port + '0';
+    cmd += buf;
+    
+    sendCommand(cmd.c_str());
+    recvRetNumber(&number);
+    return number;
+}
+
+bool NexGpio::analog_write(uint32_t port,uint32_t value)
+{
+    char buf[10] = {0};
+    char c;
+    String cmd;
+    
+    utoa(value, buf, 10);
+    cmd += "pwm";
+    c = port + '0';
+    cmd += c;
+    cmd += '=';
+    cmd += buf;
+    
+    Serial.print(cmd);
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();   
+}
+
+bool NexGpio::set_pwmfreq(uint32_t value)
+{
+    char buf[10] = {0};
+    String cmd;
+    
+    utoa(value, buf, 10);
+    cmd += "pwmf";
+    cmd += '=';
+    cmd += buf;
+    
+    sendCommand(cmd.c_str());
+    return recvRetCommandFinished();   
+}
+
+uint32_t NexGpio::get_pwmfreq(uint32_t *number)
+{
+    String cmd = String("get pwmf");
+    sendCommand(cmd.c_str());
+    return recvRetNumber(number);
+}