added ESP32 platform (#30)

* added ESP32 platform

* fixed typo in comments

examples/knx-demo/knx-demo.ino

@@ -84,7 +84,7 @@ void setup()
         SerialDBG.println(knx.paramByte(4));
     }
 
-    // pin or GPIO the programming led is connected to. Default is LED_BUILDIN
+    // pin or GPIO the programming led is connected to. Default is LED_BUILTIN
     // knx.ledPin(LED_BUILTIN);
     // is the led active on HIGH or low? Default is LOW
     // knx.ledPinActiveOn(HIGH);

src/esp32_platform.cpp

@@ -0,0 +1,331 @@
+#include "esp32_platform.h"
+
+#ifdef ARDUINO_ARCH_ESP32
+#include <Arduino.h>
+#include <EEPROM.h>
+
+#include "knx/bits.h"
+
+#define SerialDBG Serial
+
+Esp32Platform::Esp32Platform()
+{
+}
+
+uint32_t Esp32Platform::currentIpAddress()
+{
+    return WiFi.localIP();
+}
+
+uint32_t Esp32Platform::currentSubnetMask()
+{
+    return WiFi.subnetMask();
+}
+
+uint32_t Esp32Platform::currentDefaultGateway()
+{
+    return WiFi.gatewayIP();
+}
+
+void Esp32Platform::macAddress(uint8_t * addr)
+{
+    esp_wifi_get_mac(WIFI_IF_STA, addr);
+}
+
+void Esp32Platform::restart()
+{
+    Serial.println("restart");
+    ESP.restart();
+}
+
+void Esp32Platform::fatalError()
+{
+    Serial.println("GURU MEDITATION - fatal error!");
+    const int period = 200;
+    while (true)
+    {
+#ifdef LED_BUILTIN
+        if ((millis() % period) > (period / 2))
+            digitalWrite(LED_BUILTIN, HIGH);
+        else
+            digitalWrite(LED_BUILTIN, LOW);
+#endif
+    }
+}
+
+void Esp32Platform::setupMultiCast(uint32_t addr, uint16_t port)
+{
+    _mulitcastAddr = htonl(addr);
+    _mulitcastPort = port;
+    IPAddress mcastaddr(_mulitcastAddr);
+    
+    Serial.printf("setup multicast addr: %s port: %d ip: %s\n", mcastaddr.toString().c_str(), port,
+        WiFi.localIP().toString().c_str());
+    uint8_t result = _udp.beginMulticast(mcastaddr, port);
+    Serial.printf("result %d\n", result);
+}
+
+void Esp32Platform::closeMultiCast()
+{
+    _udp.stop();
+}
+
+bool Esp32Platform::sendBytes(uint8_t * buffer, uint16_t len)
+{
+    //printHex("<- ",buffer, len);
+    int result = 0;
+    result = _udp.beginMulticastPacket();
+    result = _udp.write(buffer, len);
+    result = _udp.endPacket();
+    return true;
+}
+
+int Esp32Platform::readBytes(uint8_t * buffer, uint16_t maxLen)
+{
+    int len = _udp.parsePacket();
+    if (len == 0)
+        return 0;
+    
+    if (len > maxLen)
+    {
+        Serial.printf("udp buffer to small. was %d, needed %d\n", maxLen, len);
+        fatalError();
+    }
+
+    _udp.read(buffer, len);
+    //printHex("-> ", buffer, len);
+    return len;
+}
+
+uint8_t * Esp32Platform::getEepromBuffer(uint16_t size)
+{
+    EEPROM.begin(size);
+    return EEPROM.getDataPtr();
+}
+
+void Esp32Platform::commitToEeprom()
+{
+    EEPROM.commit();
+}
+
+void Esp32Platform::setupUart()
+{
+    Serial.begin(19200, SERIAL_8E1);
+    while (!Serial) ;
+}
+
+
+void Esp32Platform::closeUart()
+{
+    Serial.end();
+}
+
+
+int Esp32Platform::uartAvailable()
+{
+    return Serial.available();
+}
+
+
+size_t Esp32Platform::writeUart(const uint8_t data)
+{
+    printHex("<p", &data, 1);
+    return Serial.write(data);
+}
+
+
+size_t Esp32Platform::writeUart(const uint8_t *buffer, size_t size)
+{
+    printHex("<p", buffer, size);
+    return Serial.write(buffer, size);
+}
+
+
+int Esp32Platform::readUart()
+{
+    int val = Serial.read();
+    if (val > 0)
+        printHex("p>", (uint8_t*)&val, 1);
+    return val;
+}
+
+
+size_t Esp32Platform::readBytesUart(uint8_t *buffer, size_t length)
+{
+    size_t toRead = length;
+    uint8_t* pos = buffer;
+    while (toRead > 0)
+    {
+        size_t val = Serial.readBytes(pos, toRead);
+        pos += val;
+        toRead -= val;
+    }
+    
+    
+    printHex("p>", buffer, length);
+    return length;
+}
+
+void print(const char* s)
+{
+    Serial.printf("%s", s);
+}
+void print(char c)
+{
+    Serial.printf("%c", c);
+}
+
+void print(unsigned char num)
+{
+    print(num, DEC);
+}
+
+void print(unsigned char num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%X", num);
+    else
+        Serial.printf("%d", num);
+}
+
+void print(int num)
+{
+    print(num, DEC);
+}
+
+void print(int num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%X", num);
+    else
+        Serial.printf("%d", num);
+}
+
+void print(unsigned int num)
+{
+    print(num, DEC);
+}
+
+void print(unsigned int num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%X", num);
+    else
+        Serial.printf("%d", num);
+}
+
+void print(long num)
+{
+    print(num, DEC);
+}
+
+void print(long num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%lX", num);
+    else
+        Serial.printf("%ld", num);
+}
+
+void print(unsigned long num)
+{
+    print(num, DEC);
+}
+
+void print(unsigned long num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%lX", num);
+    else
+        Serial.printf("%ld", num);
+}
+
+void print(double num)
+{
+    Serial.printf("%f", num);
+}
+
+void println(const char* s)
+{
+    Serial.printf("%s\n", s);
+}
+void println(char c)
+{
+    Serial.printf("%c\n", c);
+}
+
+void println(unsigned char num)
+{
+    println(num, DEC);
+}
+
+void println(unsigned char num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%X\n", num);
+    else
+        Serial.printf("%d\n", num);
+}
+
+void println(int num)
+{
+    println(num, DEC);
+}
+
+void println(int num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%X\n", num);
+    else
+        Serial.printf("%d\n", num);
+}
+
+void println(unsigned int num)
+{
+    println(num, DEC);
+}
+
+void println(unsigned int num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%X\n", num);
+    else
+        Serial.printf("%d\n", num);
+}
+
+void println(long num)
+{
+    println(num, DEC);
+}
+
+void println(long num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%lX\n", num);
+    else
+        Serial.printf("%ld\n", num);
+}
+
+void println(unsigned long num)
+{
+    println(num, DEC);
+}
+
+void println(unsigned long num, int base)
+{
+    if (base == HEX)
+        Serial.printf("%lX\n", num);
+    else
+        Serial.printf("%ld\n", num);
+}
+
+void println(double num)
+{
+    Serial.printf("%f\n", num);
+}
+
+void println(void)
+{
+    Serial.printf("\n");
+}
+#endif

src/esp32_platform.h

@@ -0,0 +1,48 @@
+#ifdef ARDUINO_ARCH_ESP32
+#include "knx/platform.h"
+#include "knx/platform.h"
+#include <WiFi.h>
+#include <WiFiUdp.h>
+
+#define SerialDBG Serial
+
+class Esp32Platform : public Platform
+{
+public:
+    Esp32Platform();
+
+    // ip stuff
+    uint32_t currentIpAddress();
+    uint32_t currentSubnetMask();
+    uint32_t currentDefaultGateway();
+    void macAddress(uint8_t* addr);
+
+    // basic stuff
+    void restart();
+    void fatalError();
+
+    //multicast
+    void setupMultiCast(uint32_t addr, uint16_t port);
+    void closeMultiCast();
+    bool sendBytes(uint8_t* buffer, uint16_t len);
+    int readBytes(uint8_t* buffer, uint16_t maxLen);
+
+    //uart
+    void setupUart();
+    void closeUart();
+    int uartAvailable();
+    size_t writeUart(const uint8_t data);
+    size_t writeUart(const uint8_t *buffer, size_t size);
+    int readUart();
+    size_t readBytesUart(uint8_t *buffer, size_t length);
+    
+    //memory
+    uint8_t* getEepromBuffer(uint16_t size);
+    void commitToEeprom();
+private:
+    uint32_t _mulitcastAddr;
+    uint16_t _mulitcastPort;
+    WiFiUDP _udp;
+};
+
+#endif

src/knx/bits.h

@@ -44,6 +44,9 @@ void attachInterrupt(uint32_t pin, voidFuncPtr callback, uint32_t mode);
 #elif ARDUINO_ARCH_ESP8266
 #include <Arduino.h>
 #include <user_interface.h>
+#elif ARDUINO_ARCH_ESP32
+#include <Arduino.h>
+#include <esp_wifi.h>
 #endif
 
 void print(const char[]);

src/knx_facade.cpp

@@ -7,6 +7,8 @@ KnxFacade<SamdPlatform, Bau07B0> knx;
 #define ICACHE_RAM_ATTR
 #elif ARDUINO_ARCH_ESP8266
 KnxFacade<EspPlatform, Bau57B0> knx;
+#elif ARDUINO_ARCH_ESP32
+KnxFacade<Esp32Platform, Bau57B0> knx;
 #elif __linux__
 #define ICACHE_RAM_ATTR
 #endif

src/knx_facade.h

@@ -8,6 +8,10 @@
 #elif ARDUINO_ARCH_ESP8266
 #include "esp_platform.h"
 #include "knx/bau57B0.h"
+#elif ARDUINO_ARCH_ESP32
+#define LED_BUILTIN 13
+#include "esp32_platform.h"
+#include "knx/bau57B0.h"
 #else
 #include "linux_platform.h"
 #include "knx/bau57B0.h"
@@ -274,6 +278,8 @@ template <class P, class B> class KnxFacade : private SaveRestore
 extern KnxFacade<SamdPlatform, Bau07B0> knx;
 #elif ARDUINO_ARCH_ESP8266
 extern KnxFacade<EspPlatform, Bau57B0> knx;
+#elif ARDUINO_ARCH_ESP32
+extern KnxFacade<Esp32Platform, Bau57B0> knx;
 #elif __linux__
 // no predefined global instance
 #endif