port for Raspberry PI

examples/raspi/Makefile

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+# Makefile
+# Caution: requires bcm2835 library to be already installed
+# http://www.airspayce.com/mikem/bcm2835/
+BCM2835 = 1.59
+
+all: /usr/local/lib/libbcm2835.a arduino-lmic.a
+
+include Makefile.env
+
+arduino-lmic.a: raspi.o radio.o oslmic.o lmic.o hal.o aes.o \
+		lmic_as923.o lmic_au921.o lmic_eu868.o lmic_in866.o lmic_us915.o \
+		lmic_us_like.o lmic_eu_like.o
+	$(AR) rcs $@ $^
+
+raspi.o: $(LMICBASE)/raspi/raspi.cpp
+	$(CXX) $(CFLAGS) -c $^ $(INCLUDE)
+
+radio.o: $(LMICBASE)/lmic/radio.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+oslmic.o: $(LMICBASE)/lmic/oslmic.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic.o: $(LMICBASE)/lmic/lmic.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+hal.o: $(LMICBASE)/hal/hal.cpp
+	$(CXX) $(CFLAGS) -c $^ $(INCLUDE)
+
+aes.o: $(LMICBASE)/aes/lmic.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE) -o aes.o
+
+lmic_as923.o: $(LMICBASE)/lmic/lmic_as923.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic_au921.o: $(LMICBASE)/lmic/lmic_au921.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic_eu868.o: $(LMICBASE)/lmic/lmic_eu868.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic_in866.o: $(LMICBASE)/lmic/lmic_in866.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic_us915.o: $(LMICBASE)/lmic/lmic_us915.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic_us_like.o: $(LMICBASE)/lmic/lmic_us_like.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+lmic_eu_like.o: $(LMICBASE)/lmic/lmic_eu_like.c
+	$(CC) $(CFLAGS) -c $^ $(INCLUDE)
+
+/usr/local/lib/libbcm2835.a:
+	[ -f bcm2835-$(BCM2835).tar.gz ] || wget http://www.airspayce.com/mikem/bcm2835/bcm2835-$(BCM2835).tar.gz
+	if [ ! -f $@ ]; then \
+		set -e; \
+		tar xvfz bcm2835-$(BCM2835).tar.gz; \
+		cd bcm2835-$(BCM2835); \
+		./configure && make && sudo make install; \
+	fi

examples/raspi/Makefile.env

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+# Makefile
+# Caution: requires bcm2835 library to be already installed
+# http://www.airspayce.com/mikem/bcm2835/
+
+CC       = gcc -std=c99
+CXX      = g++ -std=c++11
+CFLAGS   = -DRASPBERRY_PI -DBCM2835_NO_DELAY_COMPATIBILITY -D__BASEFILE__=\"$*\" -D_GNU_SOURCE
+LIBS     = -lbcm2835
+LMICBASE = $(LIBDIR)../../src
+INCLUDE  = -I$(LMICBASE)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $(INCLUDE) $<
+
+%.o: %.cpp
+	$(CXX) $(CFLAGS) -c $(INCLUDE) $<
+
+%: %.o $(LIBDIR)arduino-lmic.a
+	$(CXX) $^ $(LIBS) -o $@
+
+clean:
+	rm -rf *.o *.a $(BIN)
+
+.SUFFIXES: # no implicit rules

examples/raspi/README.txt

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+
+raspberry pi examples
+origin: https://github.com/hallard/arduino-lmic/tree/rpi/examples/raspi

examples/raspi/get_deveui/Makefile

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+# Sample for ttn-abp example on Raspberry Pi
+# Caution: requires bcm2835 library to be already installed
+# http://www.airspayce.com/mikem/bcm2835/
+
+BIN=get_deveui
+
+LIBDIR=../
+all: $(BIN)
+include ../Makefile.env

examples/raspi/get_deveui/get_deveui.c

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+// get_deveui.c
+//
+// Example program to get LoraWAN device EUI from MAC Address
+// Use the Makefile in this directory:
+// cd example/raspi/get_deveui
+// make
+// sudo ./get_deveui
+//
+// written  by Charles-Henri Hallard (hallard.me)
+
+#include <stdio.h>
+#include <ifaddrs.h>
+#include <netpacket/packet.h>
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <string.h>
+#include <sys/stat.h> 
+#include <fcntl.h>
+#include <unistd.h>
+#include <strings.h>
+
+int main (int argc, const char * argv[])
+{
+  struct ifaddrs *ifaddr=NULL;
+  struct ifaddrs *ifa = NULL;
+  int family = 0;
+  int i = 0;
+  int all=0;
+
+  if (argc==2 && !strncasecmp(argv[1],"all", 3) ) {
+    all=1;
+  } else {
+    fprintf(stdout, "Use \"%s all\" to see all interfaces and details\n", __BASEFILE__ );
+  }
+
+  // get linked list of the network interfaces
+  if (getifaddrs(&ifaddr) == -1) {
+    perror("getifaddrs");
+
+  } else {
+    // Loop thru interfaces list
+    for ( ifa=ifaddr; ifa!=NULL; ifa=ifa->ifa_next) {
+      // Ethernet
+      if ( (ifa->ifa_addr) && (ifa->ifa_addr->sa_family==AF_PACKET) ) {
+        // Not loopback interface
+        if (! (ifa->ifa_flags & IFF_LOOPBACK)) {
+          char fname[128];
+          int fd;
+          int up=0;
+          struct sockaddr_ll *s = (struct sockaddr_ll*)ifa->ifa_addr;
+
+          // Get interface status 
+          // Interface can be up with no cable connected and to be sure
+          // It's up, active and connected we need to get operstate
+          // 
+          // if up + cable    if up + NO cable    if down + cable
+          // =============    ==========          ==================
+          // carrier:1        carrier:0           carrier:Invalid
+          // dormant:0        dormant:0           dormant:Invalid
+          // operstate:up     operstate:down      operstate :own
+          sprintf(fname, "/sys/class/net/%s/operstate", ifa->ifa_name);
+
+          if ( (fd = open( fname, O_RDONLY)) > 0 ){
+            char buf[2];
+            if ( read(fd, buf, 2) > 0 ) {
+              if ( buf[0]=='u' && buf[1]=='p' ) {
+                up=1;
+              }
+              close(fd);
+            } else {
+              perror("read()");
+            }
+          } else {
+            perror(fname);
+          }
+
+          //active interface or all wanted
+          if (all || up) {
+            char deveui[8];
+            char *p = deveui;
+            // deveui is LSB to we reverse it so TTN display 
+            // will remain the same as MAC address
+            // MAC is 6 bytes, devEUI 8, set first 2 ones 
+            // with an arbitrary value
+            *p++ = 0x00;
+            *p++ = 0x04;
+            // Then next 6 bytes are mac address still reversed
+            for ( i=0; i<6 ; i++) {
+              *p++ = s->sll_addr[5-i];
+            }
+
+            // Device Info
+            fprintf(stdout, "// %s %s %s ", ifa->ifa_name, ifa->ifa_flags&IFF_UP?"Up":"Down", up?"Linked":"No Link");
+            // Raw format for ttnctl
+            p = deveui+8;
+            fprintf(stdout, "TTN Dashboard DEVEUI format ");
+            for ( i=0 ; i<8 ; i++) {
+              fprintf( stdout, "%02X", *--p);
+            }
+
+            p = deveui;
+            // LSB format for application code
+            fprintf(stdout, "\nstatic const u1_t PROGMEM DEVEUI[8]={");
+            for ( i=0 ; i<8 ; i++) {
+              fprintf( stdout, " 0x%02x%c", *p++, i<7?',':' ');
+            }
+            fprintf( stdout, "}; // %s\n", ifa->ifa_name);
+
+          } 
+        }
+      }
+    }
+
+    // Free our Linked list
+    freeifaddrs(ifaddr);
+  }
+  return 0;
+}
+

examples/raspi/raw/Makefile

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+# Sample for ttn-abp example on Raspberry Pi
+# Caution: requires bcm2835 library to be already installed
+# http://www.airspayce.com/mikem/bcm2835/
+
+BIN=raw
+
+LIBDIR=../
+all: $(BIN)
+include ../Makefile.env

examples/raspi/raw/raw.cpp

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+/*******************************************************************************
+ * Copyright (c) 2015 Matthijs Kooijman
+ *
+ * Permission is hereby granted, free of charge, to anyone
+ * obtaining a copy of this document and accompanying files,
+ * to do whatever they want with them without any restriction,
+ * including, but not limited to, copying, modification and redistribution.
+ * NO WARRANTY OF ANY KIND IS PROVIDED.
+ *
+ * This example transmits data on hardcoded channel and receives data
+ * when not transmitting. Running this sketch on two nodes should allow
+ * them to communicate.
+ *******************************************************************************/
+
+#include <lmic.h>
+#include <hal/hal.h>
+
+#include <raspi/raspi.h>
+
+#if !defined(DISABLE_INVERT_IQ_ON_RX)
+#error This example requires DISABLE_INVERT_IQ_ON_RX to be set. Update \
+       config.h in the lmic library to set it.
+#endif
+
+// How often to send a packet. Note that this sketch bypasses the normal
+// LMIC duty cycle limiting, so when you change anything in this sketch
+// (payload length, frequency, spreading factor), be sure to check if
+// this interval should not also be increased.
+// See this spreadsheet for an easy airtime and duty cycle calculator:
+// https://docs.google.com/spreadsheets/d/1voGAtQAjC1qBmaVuP1ApNKs1ekgUjavHuVQIXyYSvNc 
+#define TX_INTERVAL 2000
+
+// Pin mapping
+const lmic_pinmap lmic_pins = {
+    .nss = 6,
+    .rxtx = LMIC_UNUSED_PIN,
+    .rst = 5,
+    .dio = {2, 3, 4},
+};
+
+
+// These callbacks are only used in over-the-air activation, so they are
+// left empty here (we cannot leave them out completely unless
+// DISABLE_JOIN is set in config.h, otherwise the linker will complain).
+void os_getArtEui (u1_t* buf) { }
+void os_getDevEui (u1_t* buf) { }
+void os_getDevKey (u1_t* buf) { }
+
+void onEvent (ev_t ev) {
+}
+
+osjob_t txjob;
+osjob_t timeoutjob;
+static void tx_func (osjob_t* job);
+
+// Transmit the given string and call the given function afterwards
+void tx(const char *str, osjobcb_t func) {
+  os_radio(RADIO_RST); // Stop RX first
+  delay(1); // Wait a bit, without this os_radio below asserts, apparently because the state hasn't changed yet
+  LMIC.dataLen = 0;
+  while (*str)
+    LMIC.frame[LMIC.dataLen++] = *str++;
+  LMIC.osjob.func = func;
+  os_radio(RADIO_TX);
+  Serial.println("TX");
+}
+
+// Enable rx mode and call func when a packet is received
+void rx(osjobcb_t func) {
+  LMIC.osjob.func = func;
+  LMIC.rxtime = os_getTime(); // RX _now_
+  // Enable "continuous" RX (e.g. without a timeout, still stops after
+  // receiving a packet)
+  os_radio(RADIO_RXON);
+  Serial.println("RX");
+}
+
+static void rxtimeout_func(osjob_t *job) {
+  digitalWrite(LED_BUILTIN, LOW); // off
+}
+
+static void rx_func (osjob_t* job) {
+  // Blink once to confirm reception and then keep the led on
+  digitalWrite(LED_BUILTIN, LOW); // off
+  delay(10);
+  digitalWrite(LED_BUILTIN, HIGH); // on
+
+  // Timeout RX (i.e. update led status) after 3 periods without RX
+  os_setTimedCallback(&timeoutjob, os_getTime() + ms2osticks(3*TX_INTERVAL), rxtimeout_func);
+
+  // Reschedule TX so that it should not collide with the other side's
+  // next TX
+  os_setTimedCallback(&txjob, os_getTime() + ms2osticks(TX_INTERVAL/2), tx_func);
+
+  Serial.print("Got ");
+  Serial.print(LMIC.dataLen);
+  Serial.println(" bytes");
+  Serial.write(LMIC.frame, LMIC.dataLen);
+  Serial.println();
+
+  // Restart RX
+  rx(rx_func);
+}
+
+static void txdone_func (osjob_t* job) {
+  rx(rx_func);
+}
+
+// log text to USART and toggle LED
+static void tx_func (osjob_t* job) {
+  // say hello
+  tx("Hello, world!", txdone_func);
+  // reschedule job every TX_INTERVAL (plus a bit of random to prevent
+  // systematic collisions), unless packets are received, then rx_func
+  // will reschedule at half this time.
+  os_setTimedCallback(job, os_getTime() + ms2osticks(TX_INTERVAL + random(500)), tx_func);
+}
+
+// application entry point
+void setup() {
+  printf("Starting\n");
+
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  // initialize runtime env
+  os_init();
+
+  // Set up these settings once, and use them for both TX and RX
+
+#if defined(CFG_eu868)
+  // Use a frequency in the g3 which allows 10% duty cycling.
+  LMIC.freq = 869525000;
+#elif defined(CFG_us915)
+  LMIC.freq = 902300000;
+#endif
+
+  // Maximum TX power
+  LMIC.txpow = 27;
+  // Use a medium spread factor. This can be increased up to SF12 for
+  // better range, but then the interval should be (significantly)
+  // lowered to comply with duty cycle limits as well.
+  LMIC.datarate = DR_SF9;
+  // This sets CR 4/5, BW125 (except for DR_SF7B, which uses BW250)
+  LMIC.rps = updr2rps(LMIC.datarate);
+
+  printf("Started\n");
+
+  // setup initial job
+  os_setCallback(&txjob, tx_func);
+}
+
+int main(void) {
+
+  setup();
+
+  while(1) {
+    // execute scheduled jobs and events
+    os_runloop_once();
+  }
+}