Added sleep mode for VS1053, HTTP server, tar upload, JSON status, RFID card removal debouncing, ...

include/config.h

@@ -21,6 +21,12 @@
 #define TX 1
 
 #define SHOW_DEBUG
+//#define SHOW_TRACE
+
+#define WIFI_SSID "Schlenz"
+#define WIFI_PASS "1410WischlingenPanda"
+
+#define VS1053_SLEEP_DELAY 5000
 
 
 #define PIN_SD_CS            D4
@@ -56,3 +62,9 @@
 #else
 	#define DEBUG(x, ...) while(0) {}
 #endif
+
+#ifdef SHOW_TRACE
+	#define TRACE(x, ...) Serial.printf(x, ##__VA_ARGS__)
+#else
+	#define TRACE(x, ...) while(0) {}
+#endif

include/controller.h

@@ -16,6 +16,7 @@ private:
 	void _check_buttons();
 	uint32_t _get_rfid_card_uid();
 	uint32_t _last_rfid_card_uid = 0;
+	uint8_t _no_rfid_card_count = 0;
 	Player* _player;
 	unsigned long _last_rfid_scan_at = 0;
 	String _serial_buffer = String();
@@ -26,5 +27,6 @@ private:
 	bool _check_button(uint8_t btn);
 public:
 	Controller(Player* p, MCP* m);
+	String rfid_uid() { return String(_last_rfid_card_uid, HEX); }
 	void loop();
 };

include/http_server.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <ESP8266WebServer.h>
+#include "spi_master.h"
+#include "player.h"
+#include "controller.h"
+#include <SD.h>
+#include <WiFiClient.h>
+#include <ESP8266WiFi.h>
+#include <ESP8266mDNS.h>
+
+class HTTPServer {
+private:
+	ESP8266WebServer* _http_server;
+	void _handle_upload();
+	uint16_t _chunk_length;
+	uint8_t* _chunk;
+	uint32_t _file_size;
+	uint32_t _file_size_done;
+	bool _need_header;
+	uint32_t _upload_position;
+	void _handle_index();
+	void _handle_status();
+	Player* _player;
+	Controller* _controller;
+public:
+	HTTPServer(Player* p, Controller* c);
+	void loop();
+};

include/player.h

@@ -10,6 +10,7 @@
 #define SCI_STATUS 0x01
 #define SCI_CLOCKF 0x03
 #define SCI_DECODE_TIME 0x04
+#define SCI_AUDATA 0x05
 #define SCI_VOL 0x0B
 #define SCI_WRAMADDR 0x07
 #define SCI_WRAM 0x06
@@ -30,7 +31,8 @@
 class Player {
 private:
 	enum state { uninitialized, idle, playing, stopping,
-		system_sound_while_playing, system_sound_while_stopped };
+		system_sound_while_playing, system_sound_while_stopped,
+		sleeping };
 	struct album_state {
 		uint8_t index;
 		uint32_t position;
@@ -51,12 +53,15 @@ private:
 	void _flush(uint count, int8_t fill_byte);
 	void _set_last_track(const char* album, uint8_t track, uint32_t position);
 	std::map<String, album_state> _last_tracks;
+	String _random_album();
 	void _play_file(String filename, uint32_t offset);
 	uint32_t _id3_tag_offset(File f);
 	void _finish_playing();
 	void _finish_stopping();
 	void _mute();
 	void _unmute();
+	void _sleep();
+	void _wakeup();
 
 	SPISettings _spi_settings_slow = SPISettings(250000, MSBFIRST, SPI_MODE0);
 	SPISettings _spi_settings_fast = SPISettings(4000000, MSBFIRST, SPI_MODE0);
@@ -75,18 +80,25 @@ private:
 	uint16_t _stop_delay;
 	uint32_t _skip_to;
 	MCP* _mcp;
+	unsigned long _stopped_at;
 public:
 	Player(MCP* m);
 	void vol_up();
 	void vol_down();
 	void track_next();
 	void track_prev();
+	bool is_playing();
 
 	bool play_album(String album);
+	void play_random_album();
 	bool play_song(String album, uint8_t song_index, uint32_t offset=0);
 	void play_system_sound(String filename);
 	void stop();
 	bool loop();
 	void set_volume(uint8_t vol, bool save = true);
-	std::list<String> ls(String path);
+	std::list<String> ls(String path, bool withFiles=true, bool withDirs=true, bool withHidden=false);
+	String album() { return _playing_album; }
+	uint8_t track() { return _playing_index; }
+	uint32_t position() { return _current_play_position; }
+	uint8_t volume() { return _volume; }
 };

src/controller.cpp

@@ -53,12 +53,18 @@ void Controller::_check_rfid() {
 	uint32_t uid = _get_rfid_card_uid();
 	if (uid != _last_rfid_card_uid) {
 		if (uid > 0) {
+			_no_rfid_card_count = 0;
 			INFO("New RFID card uid: %08x\n", uid);
 			String s_uid = String(uid, HEX);
 			_player->play_album(s_uid);
 		} else {
+			if (_no_rfid_card_count >= 1) {
 				INFO("No more RFID card.");
 				_player->stop();
+			} else {
+				_no_rfid_card_count++;
+				return;
+			}
 		}
 		_last_rfid_card_uid = uid;
 	}
@@ -80,12 +86,14 @@ void Controller::_check_serial() {
 }
 
 void Controller::_execute_serial_command(String cmd) {
-	DEBUG("Executing command: %s", cmd.c_str());
+	DEBUG("Executing command: %s\n", cmd.c_str());
 
 	if (cmd.equals("ls")) {
 		_execute_command_ls("/");
 	} else if (cmd.startsWith("ls ")) {
 		_execute_command_ls(cmd.substring(3));
+	} else if (cmd.equals("play")) {
+		_player->play_random_album();
 	} else if (cmd.startsWith("play ")) {
 		_player->play_album(cmd.substring(5));
 	} else if (cmd.startsWith("sys ")) {

src/http_server.cpp

@@ -0,0 +1,154 @@
+#include "http_server.h"
+
+HTTPServer::HTTPServer(Player* p, Controller* c) {
+	_player = p;
+	_controller = c;
+	_http_server = new ESP8266WebServer(80);
+	DEBUG("Connecting to wifi \"%s\"...\n", WIFI_SSID);
+	WiFi.mode(WIFI_AP_STA);
+	WiFi.begin(WIFI_SSID, WIFI_PASS);
+	if (WiFi.waitForConnectResult() != WL_CONNECTED) {
+		ERROR("Could not connect to Wifi. Rebooting.");
+		delay(1000);
+		ESP.restart();
+	}
+	INFO("WiFi connected.\n");
+	MDNS.begin("esmp3");
+	//_http_server->onFileUpload([&]() { _handle_upload(); yield();});
+	_http_server->on("/upload", HTTP_POST, [&]() {
+		_http_server->sendHeader("Connection", "close");
+		_http_server->send(200, "text/plain", "OK");
+	}, [&]() {
+		_handle_upload();
+		yield();
+	});
+	_http_server->on("/", HTTP_GET, [&](){ _handle_index(); });
+	_http_server->on("/status", HTTP_GET, [&](){ _handle_status(); });
+	_http_server->begin();
+	MDNS.addService("http", "tcp", 80);
+}
+
+void HTTPServer::_handle_upload() {
+	// https://www.gnu.org/software/tar/manual/html_node/Standard.html
+	// https://www.mkssoftware.com/docs/man4/tar.4.asp
+	HTTPUpload* upload = &_http_server->upload();
+	DEBUG("_handle_upload Status: %d, length: %d\n", upload->status, upload->currentSize);
+	
+	if (upload->status == UPLOAD_FILE_START) {
+		_chunk = new uint8_t[512];
+		_chunk_length = 0;
+		_upload_position = 0;
+		_file_size = 0;
+		_file_size_done = 0;
+		_need_header = true;
+	}
+	
+	if (upload->status == UPLOAD_FILE_END || upload->status == UPLOAD_FILE_ABORTED) {
+		// Close the file
+		delete _chunk;
+		return;
+	}
+	
+	uint32_t upload_offset = 0;
+	while (upload_offset < upload->currentSize) {
+		// Load a chunk
+		if (_chunk_length < 512 && upload->currentSize > upload_offset) {
+			uint16_t needed = 512 - _chunk_length;
+			if (needed > upload->currentSize - upload_offset) needed = upload->currentSize - upload_offset;
+			memcpy(_chunk + _chunk_length, upload->buf + upload_offset, needed);
+			_chunk_length += needed;
+			upload_offset += needed;
+			_upload_position += needed;
+		
+			if (_chunk_length == 512) {
+				// Process chunk
+				DEBUG("Chunk.\n");
+				if (_need_header) {
+					if (_chunk[257]=='u'&&_chunk[258]=='s'&&_chunk[259]=='t'&&_chunk[260]=='a'&&_chunk[261]=='r') {
+						DEBUG("It is a valid header, starting at 0x%X!\n", _upload_position-512);
+						char filename[200];
+						strncpy(filename, (char*)_chunk, 100);
+						DEBUG("filename: %s\n", filename);
+						_file_size = 0;
+						_file_size_done = 0;
+						for (int i=0; i<11; i++) {
+							//Serial.print(_header_buffer[124 + i]);
+							_file_size = (_file_size<<3) + (_chunk[124 + i] - '0');
+						}
+						DEBUG("filesize: %d\n", _file_size);
+						uint8_t type = _chunk[156] - '0';
+						if (type==0) {
+							DEBUG("Is a file.\n");
+						} else if (type==5) {
+							DEBUG("Is a directory.\n");
+						} else {
+							ERROR("Unknown file type %d\n", type);
+						}
+						_need_header = (type==5 || _file_size==0); // No chunks needed for directories.
+					} else {
+						bool byte_found = false;
+						for (int i=0; i<512; i++) byte_found = byte_found || _chunk[i]>0;
+						if (!byte_found) {
+							DEBUG("Empty chunk while looking for header -> ignoring.\n");
+						} else {
+							ERROR("Invalid tar header: %c %c %c %c %c. Looking at header start offset 0x%X.\n", _chunk[257], _chunk[258], _chunk[259], _chunk[260], _chunk[261], _upload_position-512);
+						}
+					}
+				} else {
+					uint16_t bytes_to_write = _file_size - _file_size_done;
+					if (bytes_to_write > 512) bytes_to_write=512;
+					// Write bytes...
+					_file_size_done += bytes_to_write;
+					if (_file_size_done >= _file_size) _need_header = true;
+				}
+				
+				_chunk_length = 0;
+			}
+		}
+		
+	}
+}
+
+void HTTPServer::_handle_index() {
+	String response = String("<html><head><title>ESMP3</title><script>function play_album(e) {}</script></head><body>");
+	response.concat("Albums on SD card:<table>");
+	std::list<String> files = _player->ls("/", false, true, false);
+	for(std::list<String>::iterator it=files.begin(); it!=files.end(); it++) {
+		response.concat("<tr><td>");
+		response.concat(*it);
+		response.concat("</td><td><a href='#' onclick='play_album();'>Play</a></td></tr>\n");
+	}
+	response.concat("</table></body></html>");
+	_http_server->send(200, "text/html", response);
+}
+
+void HTTPServer::_handle_status() {
+	String response = String("{");
+	response.concat("\"state\": \"");
+	response.concat(_player->is_playing() ? "playing" : "idle");
+	response.concat("\", ");
+	if (_player->is_playing()) {
+		response.concat("\"album\": \"");
+		response.concat(_player->album());
+		response.concat("\", \"track\": ");
+		response.concat(_player->track());
+		response.concat(", \"position\": ");
+		response.concat(_player->position());
+		response.concat(", ");
+	}
+	response.concat("\"volume\": ");
+	response.concat(_player->volume());
+	response.concat(", \"volume_max\": ");
+	response.concat(VOLUME_MAX);
+	response.concat(", \"volume_min\": ");
+	response.concat(VOLUME_MIN);
+	response.concat(", \"rfid_uid\": ");
+	response.concat(_controller->rfid_uid());
+	response.concat("}");
+	_http_server->send(200, "application/json", response);
+}
+
+void HTTPServer::loop() {
+	_http_server->handleClient();
+	MDNS.update();
+}

src/main.cpp

@@ -6,10 +6,12 @@
 #include "controller.h"
 #include "player.h"
 #include "spi_master.h"
+#include "http_server.h"
 
 Controller* controller;
 Player* player;
 MCP* mcp;
+HTTPServer* http_server;
 
 void setup() {
 	delay(500);
@@ -17,6 +19,8 @@ void setup() {
 	INFO("Starting.\n");
 	INFO("Initializing...\n");
 	
+	
+
 	DEBUG("Setting up SPI...\n");
 	SPI.begin();
 	SPIMaster::init();
@@ -35,8 +39,14 @@ void setup() {
 		ERROR("Could not initialize SD card. Halting.\n");
 		while(1);
 	}
+	
+	DEBUG("Initializing Player and Controller...\n");
 	player = new Player(mcp);
     controller = new Controller(player, mcp);
+    INFO("Player and controller initialized.\n");
+    
+    DEBUG("Setting up WiFi and web server...\n");
+	http_server = new HTTPServer(player, controller);
 
     INFO("Initialization completed.\n");
 }
@@ -46,4 +56,5 @@ void loop() {
 	if (more_data_needed) return;
 
 	controller->loop();
+	http_server->loop();
 }

src/player.cpp

@@ -72,6 +72,27 @@ void Player::_init() {
 	_state = idle;
 }
 
+void Player::_sleep() {
+	DEBUG("VS1053 going to sleep.\n");
+	_write_control_register(SCI_CLOCKF, 0x0000);
+	_spi_settings = &_spi_settings_slow;
+	_write_control_register(SCI_AUDATA, 0x0010);
+	set_volume(0, false);
+	_state = sleeping;
+}
+
+void Player::_wakeup() {
+	if (_state != sleeping) return;
+	_stopped_at = millis();
+	DEBUG("Waking VS1053...\n");
+	set_volume(_volume, false);
+	_write_control_register(SCI_AUDATA, 0x0000);
+	_write_control_register(SCI_CLOCKF, 0x6000);
+	delay(10);
+	_spi_settings = &_spi_settings_fast;
+	_state = idle;
+}
+
 void Player::_check_system_sound(String filename) {
 	String path = String("/system/") + filename;
 	if (!SD.exists(path)) {
@@ -159,7 +180,6 @@ void Player::set_volume(uint8_t vol, bool save) {
 	}
 	INFO("Setting volume to %d\n", vol);
 	vol = 0xFF - vol;
-	if (vol==0xFF) vol=0xFE;
 	uint16_t value = (vol<<8)|vol;
 	DEBUG("Setting volume register to 0x%04X\n", value);
 	_write_control_register(SCI_VOL, value);
@@ -178,12 +198,12 @@ void Player::vol_down() {
 }
 
 void Player::_mute() {
-	INFO("Muting.");
+	INFO("Muting.\n");
-	set_volume(0, false);
+	set_volume(1, false);
 }
 
 void Player::_unmute() {
-	INFO("Unmuting.");
+	INFO("Unmuting.\n");
 	set_volume(_volume, false);
 }
 
@@ -212,21 +232,30 @@ void Player::track_prev() {
 	}
 }
 
-std::list<String> Player::ls(String path) {
+bool Player::is_playing() {
+	return _state == playing;
+}
+
+std::list<String> Player::ls(String path, bool withFiles, bool withDirs, bool withHidden) {
 	SPIMaster::enable(PIN_SD_CS);
 	std::list<String> result;
 	if (!SD.exists(path)) return result;
 	File dir = SD.open(path);
 	File entry;
 	while (entry = dir.openNextFile()) {
+		if (!withDirs && entry.isDirectory()) continue;
+		if (!withFiles && !entry.isDirectory()) continue;
 		String filename = entry.name();
+		if (!withHidden && filename.startsWith(".")) continue;
 		if (entry.isDirectory()) filename.concat("/");
 		result.push_back(filename);
 	}
+	result.sort();
 	return result;
 }
 
 String Player::_find_album_dir(String id) {
+	if (id.endsWith("/")) id = id.substring(0, id.length() - 1);
 	String id_with_divider = id + " - ";
 	File root = SD.open("/");
 	File entry;
@@ -259,10 +288,10 @@ std::list<String> Player::_files_in_dir(String path) {
 		      filename.endsWith(".wma") ||
 		      filename.endsWith(".mp4") ||
 		      filename.endsWith(".mpa"))) {
-			DEBUG("    Adding entry %s\n", filename.c_str());
+			TRACE("    Adding entry %s\n", filename.c_str());
 			result.push_back(path + filename);
 		} else {
-			DEBUG("  Ignoring entry %s\n", filename.c_str());
+			TRACE("  Ignoring entry %s\n", filename.c_str());
 		}
 		entry.close();
 	}
@@ -272,14 +301,26 @@ std::list<String> Player::_files_in_dir(String path) {
 	return result;
 }
 
+String Player::_random_album() {
+	std::list<String> albums = ls("/", false, true, false);
+	uint8_t rnd = random(albums.size());
+	std::list<String>::iterator it = albums.begin();
+	for (int i=0; i<rnd; i++) { it++; }
+	return *it;
+}
+
+void Player::play_random_album() {
+	play_album(_random_album());
+}
+
 bool Player::play_album(String album) {
-	//if (_state==playing) stop();
 	album_state s = _last_tracks[album.c_str()];
 	DEBUG("Last index for album %s was %d,%d\n", album.c_str(), s.index, s.position);
 	return play_song(album, s.index, s.position);
 }
 
 bool Player::play_song(String album, uint8_t index, uint32_t skip_to) {
+	if (_state == sleeping) _wakeup();
 	if (_state != idle) return false;
 	DEBUG("Trying to play song at index %d, offset %d of album %s\n", index, skip_to, album.c_str());
 	String path = _find_album_dir(album);
@@ -420,6 +461,7 @@ void Player::stop() {
 
 void Player::_finish_stopping() {
 	_state = idle;
+	_stopped_at = millis();
 	if (_file) {
 		_file.close();
 	}
@@ -483,6 +525,10 @@ bool Player::loop() {
 		_refill();
 		return true;
 	}
+	
+	if (_state == idle && _stopped_at < millis() - VS1053_SLEEP_DELAY) {
+		_sleep();
+	}
 	return false;
 }