Add JSON parser, vue.js SPA and pulse generator

gadgety.h

@@ -0,0 +1,8 @@
+#ifndef _GADGETY_H
+#define _GADGETY_H
+#include <ESP8266WebServer.h>
+
+void gadgety_static_init_server(ESP8266WebServer* server);
+
+#endif // _GADGETY_H
+

gadgety_esp8266_embedded_HTML.ino

@@ -1,15 +1,18 @@
+//#include <ESP8266WiFi.h>
+//#include <WiFiClient.h>
 #include <DNSServer.h>
-#include <ESP8266WiFi.h>
-#include <WiFiClient.h>
 #include <ESP8266WebServer.h>
-//#include <FS.h>
-#include "index_html.h"
+#include "gadgety.h"
+#include <ArduinoJson.h>
+
 #include <list>
 
 using namespace std;
 
 #define TIMESTEPS 80000 // 1 millisecond
-#define LINES_NUM 8
+#define LINES_NUM 4
+
+const unsigned LINE_PIN_MAP[] = { 2, 12, 13, 14 };
 
 typedef unsigned int line_time_t;
 
@@ -36,7 +39,6 @@ typedef struct {
   list<event_t>::iterator next_event;
 } line_t;
 
-// Todo: jsonify() and unjsonify()
 line_t lines[LINES_NUM];
 
 void sequencer_init(void)
@@ -46,8 +48,8 @@ unsigned i;
   for(i = 0; i < LINES_NUM; ++i) {
     lines[i].cursor = 0;
     lines[i].next_event = lines[i].events.begin();
+    pinMode(LINE_PIN_MAP[i], OUTPUT);
   }
-  pinMode(2, OUTPUT);
 }
 
 // Call every TIMESTEPS seconds
@@ -61,15 +63,22 @@ unsigned i;
   for(i = 0; i < LINES_NUM; ++i) {
     while(lines[i].next_event != lines[i].events.end() && lines[i].next_event->time == lines[i].cursor) {
       // Peform event: lines[i].next_event
-      // ...
+      switch(lines[i].next_event->type) {
+        case EVENT_NOTEON:
+          digitalWrite(LINE_PIN_MAP[i], 1);
+          break;
+        case EVENT_NOTEOFF:
+          digitalWrite(LINE_PIN_MAP[i], 0);
+          break;
+        // Todo: tone, jump, barrier, envelope
+      }
+      
       ++lines[i].next_event;
     }
 
     if(lines[i].next_event != lines[i].events.end())
       ++lines[i].cursor;
   }
-
-  digitalWrite(2, !digitalRead(2));
 }
 
 const byte DNS_PORT = 53;
@@ -77,21 +86,43 @@ ESP8266WebServer server(80); //Server on port 80
 IPAddress myIP = WiFi.softAPIP(); //Get IP address
 DNSServer dnsServer;
 
-void redirect_index()
+void serve_play(void)
 {
-  server.sendHeader("Location", "/");
-  server.send(301);
+unsigned lineno, t;
+event_t event;
+JsonArray::iterator it;
+const char *p;
+
+  if(server.args() != 1)
+    return;
+
+  StaticJsonBuffer<512> jsonbuf;
+  JsonObject &model = jsonbuf.parseObject(server.arg(0));
+  JsonArray &model_lines = model["lines"];
+  unsigned millis_per_slot = model["millis_per_slot"];
+
+  //
+  for(lineno = 0; lineno < LINES_NUM; ++lineno) {
+    lines[lineno].cursor = 0;
+    lines[lineno].events.clear();
   }
     
-void serve_index()
-{
-  server.sendHeader("Content-Encoding", "gzip");
-  server.send_P(200, "text/html", (const char*)index_html_gz, index_html_gz_len);
+  for(it = model_lines.begin(), lineno = 0; it != model_lines.end() && lineno < LINES_NUM; ++it, ++lineno) {
+    for(p = (const char*)(*it), t = 0; *p; ++p, ++t) {
+      if(*p != '0') {
+        event.type = EVENT_NOTEON;
+        event.time = t * millis_per_slot;
+        lines[lineno].events.push_back(event);
+        
+        event.type = EVENT_NOTEOFF;
+        event.time += millis_per_slot / 2;
+        lines[lineno].events.push_back(event);
+      }
+    }
   }
 
-void serve_random()
-{
-  server.send(200, "application/json", "{ \"val\": " + String(rand()) + " }");
+  for(lineno = 0; lineno < LINES_NUM; ++lineno)
+    lines[lineno].next_event = lines[lineno].events.begin();
 }
 
 void setup()
@@ -109,20 +140,14 @@ void setup()
   Serial.begin(115200);
   WiFi.mode(WIFI_AP);         //Only Access point
   WiFi.softAP("Gadgety", "gadgety123");  //Start HOTspot removing password will disable security
-  // server.on("/", handleRoot); //Which routine to handle at root location 
-  server.onNotFound([]() {
-  //   handleRoot();
-  });
-  server.begin();                  //Start server
-  //server.serveStatic("/", SPIFFS, "/index.html");
 
-  server.onNotFound(redirect_index);
-  server.on("/index.html", serve_index);
-  server.on("/", serve_index);
-  server.on("/random.ws", serve_random);
+  server.begin();
+  gadgety_static_init_server(&server); 
+  server.on("/play.ws", serve_play);
 
-  dnsServer.start(DNS_PORT, "www.gadgety.com", myIP);
+  dnsServer.start(DNS_PORT, "gadgety.com", myIP);
 }
+
 void loop() {
   dnsServer.processNextRequest();
   server.handleClient();          //Handle client requests