Diff: ESP8266/ESP8266.cpp

Revision:

13:41098c907200

Parent:

12:c5f0eac67a8a

Child:

14:4d1128f72e00

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.cpp	Sun Nov 30 21:14:09 2014 +0000
@@ -0,0 +1,299 @@
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "mbed.h"
+#include "ESP8266.h"
+#include <string>
+#include <algorithm>
+
+//Debug is disabled by default
+#if (defined(DEBUG))
+#define DBG(x, ...) std::printf("[ESP8266 : DBG]"x"\r\n", ##__VA_ARGS__);
+#define WARN(x, ...) std::printf("[ESP8266 : WARN]"x"\r\n", ##__VA_ARGS__);
+#define ERR(x, ...) std::printf("[ESP8266 : ERR]"x"\r\n", ##__VA_ARGS__);
+#else
+#define DBG(x, ...)
+#define WARN(x, ...)
+#define ERR(x, ...)
+#endif
+
+#if defined(DEBUG)
+#define INFO(x, ...) printf("[ESP8266 : INFO]"x"\r\n", ##__VA_ARGS__);
+#else
+#define INFO(x, ...)
+#endif
+
+#define MAX_TRY_JOIN 3
+
+extern Serial pc;
+
+ESP8266 * ESP8266::inst;
+
+ESP8266::ESP8266(   PinName tx, PinName rx, PinName _reset, const char * ssid, const char * phrase ):
+    wifi(tx, rx), reset_pin(_reset), buf_ESP8266(256)
+{
+    memset(&state, 0, sizeof(state));
+
+    // change all ' ' in '$' in the ssid and the passphrase
+    strcpy(this->ssid, ssid);
+    for (int i = 0; i < strlen(ssid); i++) {
+        if (this->ssid[i] == ' ')
+            this->ssid[i] = '$';
+    }
+    strcpy(this->phrase, phrase);
+    for (int i = 0; i < strlen(phrase); i++) {
+        if (this->phrase[i] == ' ')
+            this->phrase[i] = '$';
+    }
+
+    inst = this;
+    attach_rx(false);
+}
+
+bool ESP8266::join()
+{
+
+    for (int i= 0; i < MAX_TRY_JOIN; i++) {
+
+        //join the network
+        state.associated = true;
+        INFO("\r\nssid: %s\r\nphrase: %s\r\nsecurity: %s\r\n\r\n", this->ssid, this->phrase);
+        return true;
+    }
+    return false;
+}
+
+bool ESP8266::connect()
+{
+    return join();
+}
+
+bool ESP8266::gethostbyname(const char * host, char * ip)
+{
+    string h = host;
+    int nb_digits = 0;
+
+    // no dns needed
+    int pos = h.find(".");
+    if (pos != string::npos) {
+        string sub = h.substr(0, h.find("."));
+        nb_digits = atoi(sub.c_str());
+    }
+    //printf("substrL %s\r\n", sub.c_str());
+    if (count(h.begin(), h.end(), '.') == 3 && nb_digits > 0) {
+        strcpy(ip, host);
+        return true;
+    }
+    else {
+        // dns needed, not currently available
+        return false;
+    }
+}
+
+void ESP8266::flush()
+{
+    buf_ESP8266.flush();
+}
+
+bool ESP8266::sendCommand(const char * cmd, const char * ack, char * res, int timeout)
+{
+    return true;
+}
+
+bool ESP8266::close()
+{
+    return true;
+}
+
+bool ESP8266::disconnect()
+{
+    // if already disconnected, return
+    if (!state.associated)
+        return true;
+    // send command to quit AP
+    //    
+    state.associated = false;
+    return true;
+
+}
+
+bool ESP8266::is_connected()
+{
+    return true;
+}
+
+
+void ESP8266::reset()
+{
+    reset_pin = 0;
+    wait(0.2);
+    reset_pin = 1;
+    wait(0.2);
+}
+
+bool ESP8266::reboot()
+{
+    return true;
+}
+
+int ESP8266::putc(char c)
+{
+    while (!wifi.writeable());
+    return wifi.putc(c);
+}
+
+int ESP8266::readable()
+{
+    return buf_ESP8266.available();
+}
+
+int ESP8266::writeable()
+{
+    return wifi.writeable();
+}
+
+char ESP8266::getc()
+{
+    char c;
+    while (!buf_ESP8266.available());
+    buf_ESP8266.dequeue(&c);
+    return c;
+}
+
+void ESP8266::handler_rx(void)
+{
+    //read characters
+    while (wifi.readable())
+        buf_ESP8266.queue(wifi.getc());
+}
+
+void ESP8266::attach_rx(bool callback)
+{
+    if (!callback)
+        wifi.attach(NULL);
+    else
+        wifi.attach(this, &ESP8266::handler_rx);
+}
+
+
+int ESP8266::send(const char * str, int len, const char * ACK, char * res, int timeout)
+{
+    char read;
+    size_t found = string::npos;
+    string checking;
+    Timer tmr;
+    int result = 0;
+
+    DBG("will send: %s\r\n",str);
+
+    attach_rx(false);
+
+    //We flush the buffer
+    while (wifi.readable())
+        wifi.getc();
+
+    if (!ACK || !strcmp(ACK, "NO")) {
+        for (int i = 0; i < len; i++)
+            result = (putc(str[i]) == str[i]) ? result + 1 : result;
+    } else {
+        //We flush the buffer
+        while (wifi.readable())
+            wifi.getc();
+
+        tmr.start();
+        for (int i = 0; i < len; i++)
+            result = (putc(str[i]) == str[i]) ? result + 1 : result;
+
+        while (1) {
+            if (tmr.read_ms() > timeout) {
+                //We flush the buffer
+                while (wifi.readable())
+                    wifi.getc();
+
+                DBG("check: %s\r\n", checking.c_str());
+
+                attach_rx(true);
+                return -1;
+            } else if (wifi.readable()) {
+                read = wifi.getc();
+                if ( read != '\r' && read != '\n') {
+                    checking += read;
+                    found = checking.find(ACK);
+                    if (found != string::npos) {
+                        wait(0.01);
+
+                        //We flush the buffer
+                        while (wifi.readable())
+                            wifi.getc();
+
+                        break;
+                    }
+                }
+            }
+        }
+        DBG("check: %s\r\n", checking.c_str());
+
+        attach_rx(true);
+        return result;
+    }
+
+    //the user wants the result from the command (ACK == NULL, res != NULL)
+    if ( res != NULL) {
+        int i = 0;
+        Timer timeout;
+        timeout.start();
+        tmr.reset();
+        while (1) {
+            if (timeout.read() > 2) {
+                if (i == 0) {
+                    res = NULL;
+                    break;
+                }
+                res[i] = '\0';
+                DBG("user str 1: %s\r\n", res);
+
+                break;
+            } else {
+                if (tmr.read_ms() > 300) {
+                    res[i] = '\0';
+                    DBG("user str: %s\r\n", res);
+
+                    break;
+                }
+                if (wifi.readable()) {
+                    tmr.start();
+                    read = wifi.getc();
+
+                    // we drop \r and \n
+                    if ( read != '\r' && read != '\n') {
+                        res[i++] = read;
+                    }
+                }
+            }
+        }
+        DBG("user str: %s\r\n", res);
+    }
+
+    //We flush the buffer
+    while (wifi.readable())
+        wifi.getc();
+
+    attach_rx(true);
+    DBG("result: %d\r\n", result)
+    return result;
+}
\ No newline at end of file