radiohead with crypto support

2 files changed, 170 insertions, 0 deletions

diff --git a/usb-lora-crypto/Makefile b/usb-lora-crypto/Makefile
new file mode 100644
index 0000000..0b61c94
--- /dev/null
+++ b/usb-lora-crypto/Makefile
@@ -0,0 +1,52 @@
+##
+##  spreadspace avr utils
+##
+##
+##  Copyright (C) 2013-2018 Christian Pointner <equinox@spreadspace.org>
+##
+##  This file is part of spreadspace avr utils.
+##
+##  spreadspace avr utils is free software: you can redistribute it and/or modify
+##  it under the terms of the GNU General Public License as published by
+##  the Free Software Foundation, either version 3 of the License, or
+##  any later version.
+##
+##  spreadspace avr utils is distributed in the hope that it will be useful,
+##  but WITHOUT ANY WARRANTY; without even the implied warranty of
+##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+##  GNU General Public License for more details.
+##
+##  You should have received a copy of the GNU General Public License
+##  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+##
+
+NAME := usb-lora-crypto
+BOARD_TYPE := elecrow32u4lora
+CXX_OBJ := $(NAME).o
+LIBS := util led lufa-descriptor-usbserial usbio
+EXTERNAL_LIBS := lufa radiohead rweather-crypto
+SPREADAVR_PATH := ..
+
+LUFA_PATH := $(SPREADAVR_PATH)/contrib/lufa-LUFA-151115
+LUFA_OPTS  = -D USB_DEVICE_ONLY
+LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR=0
+LUFA_OPTS += -D ORDERED_EP_CONFIG
+LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
+LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
+LUFA_OPTS += -D USE_FLASH_DESCRIPTORS
+LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
+LUFA_OPTS += -D INTERRUPT_CONTROL_ENDPOINT
+
+LUFA_OPTS += -D USB_MANUFACTURER="L\"equinox\""
+LUFA_OPTS += -D USB_PRODUCT="L\"spreadspace usb-lora-crypto example\""
+
+LUFA_COMPONENTS := USB USBCLASS
+
+
+RADIOHEAD_PATH := $(SPREADAVR_PATH)/contrib/RadioHead
+
+RADIOHEAD_DRIVER := RF95
+
+RWEATHER_CRYPTO_PATH := $(SPREADAVR_PATH)/contrib/rweather-crypto
+
+include $(SPREADAVR_PATH)/include.mk
diff --git a/usb-lora-crypto/usb-lora-crypto.cpp b/usb-lora-crypto/usb-lora-crypto.cpp
new file mode 100644
index 0000000..3af1dcb
--- /dev/null
+++ b/usb-lora-crypto/usb-lora-crypto.cpp
@@ -0,0 +1,118 @@
+/*
+ *  spreadspace avr utils
+ *
+ *
+ *  Copyright (C) 2013-2016 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of spreadspace avr utils.
+ *
+ *  spreadspace avr utils is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  spreadspace avr utils is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <avr/power.h>
+#include <stdio.h>
+
+#include "util.h"
+#include "led.h"
+#include "usbio.h"
+
+#include "RadioHead.h"
+#include "RH_RF95.h"
+#include <Crypto.h>
+#include <ChaChaPoly.h>
+#include "RHAEADDriver.h"
+
+ChaChaPoly cipher;
+RH_RF95 lora;
+RHAEADDriver aead(lora, cipher);
+
+void recv_aead_msg()
+{
+  uint8_t buf[RH_RF95_MAX_MESSAGE_LEN+1];
+  uint8_t len = sizeof(buf)-1;
+
+  led2_on();
+  if(!aead.recv(buf, &len)) {
+    printf("aead.recv(): failed\r\n");
+    led2_off();
+    return;
+  }
+  buf[len] = 0;
+
+  printf("aead.recv() got message: RSSI = %d, data = ", aead.lastRssi());
+  for(uint8_t i = 0; i < len; ++i) printf("%s0x%02X", (i==0) ? "" : " ", buf[i]);
+  printf("\r\n");
+      // printf("aead.recv() got message: RSSI = %d, data = %s\r\n", aead.lastRssi(), buf);
+  led2_off();
+}
+
+void send_aead_msg()
+{
+  uint8_t data[] = "spreadspace.org/avr-utils usb-aead test using radiohead library";
+  printf("aead: sending message with %d bytes\r\n", sizeof(data));
+
+  led_on();
+  if(!aead.send(data, sizeof(data))) {
+    printf("aead.send(): failed\r\n");
+    led_off();
+    return;
+  }
+  aead.waitPacketSent();
+  printf("aead.send(): success\r\n");
+  led_off();
+}
+
+void handle_cmd(uint8_t cmd)
+{
+  switch(cmd) {
+  case 's': send_aead_msg(); break;
+  default: printf("error\r\n"); return;
+  }
+}
+
+int main(void)
+{
+  MCUSR &= ~(1 << WDRF);
+  wdt_disable();
+
+  cpu_init();
+  led_init();
+  usbio_init();
+  arduino_init();
+  sei();
+
+  lora.init();
+  lora.setFrequency(868.0);
+  aead.init();
+
+  for(;;) {
+    if(aead.available()) {
+      recv_aead_msg();
+    }
+
+    int16_t BytesReceived = usbio_bytes_received();
+    while(BytesReceived > 0) {
+      int ReceivedByte = fgetc(stdin);
+      if(ReceivedByte != EOF) {
+        handle_cmd(ReceivedByte);
+      }
+      BytesReceived--;
+    }
+
+    usbio_task();
+  }
+}