diff --git a/.gitignore b/.gitignore
index c6d44fad0..0ec49e6f6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,5 @@ Thumbs.db
.cproject
.idea/*
.vagrant
+
+flash.uf2
diff --git a/bin/uf2conv.py b/bin/uf2conv.py
new file mode 100755
index 000000000..b619d14db
--- /dev/null
+++ b/bin/uf2conv.py
@@ -0,0 +1,314 @@
+#!/usr/bin/env python3
+import sys
+import struct
+import subprocess
+import re
+import os
+import os.path
+import argparse
+
+
+UF2_MAGIC_START0 = 0x0A324655 # "UF2\n"
+UF2_MAGIC_START1 = 0x9E5D5157 # Randomly selected
+UF2_MAGIC_END = 0x0AB16F30 # Ditto
+
+families = {
+ 'SAMD21': 0x68ed2b88,
+ 'SAML21': 0x1851780a,
+ 'SAMD51': 0x55114460,
+ 'NRF52': 0x1b57745f,
+ 'STM32F0': 0x647824b6,
+ 'STM32F1': 0x5ee21072,
+ 'STM32F2': 0x5d1a0a2e,
+ 'STM32F3': 0x6b846188,
+ 'STM32F4': 0x57755a57,
+ 'STM32F7': 0x53b80f00,
+ 'STM32G0': 0x300f5633,
+ 'STM32G4': 0x4c71240a,
+ 'STM32H7': 0x6db66082,
+ 'STM32L0': 0x202e3a91,
+ 'STM32L1': 0x1e1f432d,
+ 'STM32L4': 0x00ff6919,
+ 'STM32L5': 0x04240bdf,
+ 'STM32WB': 0x70d16653,
+ 'STM32WL': 0x21460ff0,
+ 'ATMEGA32': 0x16573617,
+ 'MIMXRT10XX': 0x4FB2D5BD
+}
+
+INFO_FILE = "/INFO_UF2.TXT"
+
+appstartaddr = 0x2000
+familyid = 0x0
+
+
+def is_uf2(buf):
+ w = struct.unpack("<II", buf[0:8])
+ return w[0] == UF2_MAGIC_START0 and w[1] == UF2_MAGIC_START1
+
+def is_hex(buf):
+ try:
+ w = buf[0:30].decode("utf-8")
+ except UnicodeDecodeError:
+ return False
+ if w[0] == ':' and re.match(b"^[:0-9a-fA-F\r\n]+$", buf):
+ return True
+ return False
+
+def convert_from_uf2(buf):
+ global appstartaddr
+ numblocks = len(buf) // 512
+ curraddr = None
+ outp = b""
+ for blockno in range(numblocks):
+ ptr = blockno * 512
+ block = buf[ptr:ptr + 512]
+ hd = struct.unpack(b"<IIIIIIII", block[0:32])
+ if hd[0] != UF2_MAGIC_START0 or hd[1] != UF2_MAGIC_START1:
+ print("Skipping block at " + ptr + "; bad magic")
+ continue
+ if hd[2] & 1:
+ # NO-flash flag set; skip block
+ continue
+ datalen = hd[4]
+ if datalen > 476:
+ assert False, "Invalid UF2 data size at " + ptr
+ newaddr = hd[3]
+ if curraddr == None:
+ appstartaddr = newaddr
+ curraddr = newaddr
+ padding = newaddr - curraddr
+ if padding < 0:
+ assert False, "Block out of order at " + ptr
+ if padding > 10*1024*1024:
+ assert False, "More than 10M of padding needed at " + ptr
+ if padding % 4 != 0:
+ assert False, "Non-word padding size at " + ptr
+ while padding > 0:
+ padding -= 4
+ outp += b"\x00\x00\x00\x00"
+ outp += block[32 : 32 + datalen]
+ curraddr = newaddr + datalen
+ return outp
+
+def convert_to_carray(file_content):
+ outp = "const unsigned char bindata[] __attribute__((aligned(16))) = {"
+ for i in range(len(file_content)):
+ if i % 16 == 0:
+ outp += "\n"
+ outp += "0x%02x, " % ord(file_content[i])
+ outp += "\n};\n"
+ return outp
+
+def convert_to_uf2(file_content):
+ global familyid
+ datapadding = b""
+ while len(datapadding) < 512 - 256 - 32 - 4:
+ datapadding += b"\x00\x00\x00\x00"
+ numblocks = (len(file_content) + 255) // 256
+ outp = b""
+ for blockno in range(numblocks):
+ ptr = 256 * blockno
+ chunk = file_content[ptr:ptr + 256]
+ flags = 0x0
+ if familyid:
+ flags |= 0x2000
+ hd = struct.pack(b"<IIIIIIII",
+ UF2_MAGIC_START0, UF2_MAGIC_START1,
+ flags, ptr + appstartaddr, 256, blockno, numblocks, familyid)
+ while len(chunk) < 256:
+ chunk += b"\x00"
+ block = hd + chunk + datapadding + struct.pack(b"<I", UF2_MAGIC_END)
+ assert len(block) == 512
+ outp += block
+ return outp
+
+class Block:
+ def __init__(self, addr):
+ self.addr = addr
+ self.bytes = bytearray(256)
+
+ def encode(self, blockno, numblocks):
+ global familyid
+ flags = 0x0
+ if familyid:
+ flags |= 0x2000
+ hd = struct.pack("<IIIIIIII",
+ UF2_MAGIC_START0, UF2_MAGIC_START1,
+ flags, self.addr, 256, blockno, numblocks, familyid)
+ hd += self.bytes[0:256]
+ while len(hd) < 512 - 4:
+ hd += b"\x00"
+ hd += struct.pack("<I", UF2_MAGIC_END)
+ return hd
+
+def convert_from_hex_to_uf2(buf):
+ global appstartaddr
+ appstartaddr = None
+ upper = 0
+ currblock = None
+ blocks = []
+ for line in buf.split('\n'):
+ if line[0] != ":":
+ continue
+ i = 1
+ rec = []
+ while i < len(line) - 1:
+ rec.append(int(line[i:i+2], 16))
+ i += 2
+ tp = rec[3]
+ if tp == 4:
+ upper = ((rec[4] << 8) | rec[5]) << 16
+ elif tp == 2:
+ upper = ((rec[4] << 8) | rec[5]) << 4
+ assert (upper & 0xffff) == 0
+ elif tp == 1:
+ break
+ elif tp == 0:
+ addr = upper | (rec[1] << 8) | rec[2]
+ if appstartaddr == None:
+ appstartaddr = addr
+ i = 4
+ while i < len(rec) - 1:
+ if not currblock or currblock.addr & ~0xff != addr & ~0xff:
+ currblock = Block(addr & ~0xff)
+ blocks.append(currblock)
+ currblock.bytes[addr & 0xff] = rec[i]
+ addr += 1
+ i += 1
+ numblocks = len(blocks)
+ resfile = b""
+ for i in range(0, numblocks):
+ resfile += blocks[i].encode(i, numblocks)
+ return resfile
+
+def to_str(b):
+ return b.decode("utf-8")
+
+def get_drives():
+ drives = []
+ if sys.platform == "win32":
+ r = subprocess.check_output(["wmic", "PATH", "Win32_LogicalDisk",
+ "get", "DeviceID,", "VolumeName,",
+ "FileSystem,", "DriveType"])
+ for line in to_str(r).split('\n'):
+ words = re.split('\s+', line)
+ if len(words) >= 3 and words[1] == "2" and words[2] == "FAT":
+ drives.append(words[0])
+ else:
+ rootpath = "/media"
+ if sys.platform == "darwin":
+ rootpath = "/Volumes"
+ elif sys.platform == "linux":
+ tmp = rootpath + "/" + os.environ["USER"]
+ if os.path.isdir(tmp):
+ rootpath = tmp
+ for d in os.listdir(rootpath):
+ drives.append(os.path.join(rootpath, d))
+
+
+ def has_info(d):
+ try:
+ return os.path.isfile(d + INFO_FILE)
+ except:
+ return False
+
+ return list(filter(has_info, drives))
+
+
+def board_id(path):
+ with open(path + INFO_FILE, mode='r') as file:
+ file_content = file.read()
+ return re.search("Board-ID: ([^\r\n]*)", file_content).group(1)
+
+
+def list_drives():
+ for d in get_drives():
+ print(d, board_id(d))
+
+
+def write_file(name, buf):
+ with open(name, "wb") as f:
+ f.write(buf)
+ print("Wrote %d bytes to %s" % (len(buf), name))
+
+
+def main():
+ global appstartaddr, familyid
+ def error(msg):
+ print(msg)
+ sys.exit(1)
+ parser = argparse.ArgumentParser(description='Convert to UF2 or flash directly.')
+ parser.add_argument('input', metavar='INPUT', type=str, nargs='?',
+ help='input file (HEX, BIN or UF2)')
+ parser.add_argument('-b' , '--base', dest='base', type=str,
+ default="0x2000",
+ help='set base address of application for BIN format (default: 0x2000)')
+ parser.add_argument('-o' , '--output', metavar="FILE", dest='output', type=str,
+ help='write output to named file; defaults to "flash.uf2" or "flash.bin" where sensible')
+ parser.add_argument('-d' , '--device', dest="device_path",
+ help='select a device path to flash')
+ parser.add_argument('-l' , '--list', action='store_true',
+ help='list connected devices')
+ parser.add_argument('-c' , '--convert', action='store_true',
+ help='do not flash, just convert')
+ parser.add_argument('-D' , '--deploy', action='store_true',
+ help='just flash, do not convert')
+ parser.add_argument('-f' , '--family', dest='family', type=str,
+ default="0x0",
+ help='specify familyID - number or name (default: 0x0)')
+ parser.add_argument('-C' , '--carray', action='store_true',
+ help='convert binary file to a C array, not UF2')
+ args = parser.parse_args()
+ appstartaddr = int(args.base, 0)
+
+ if args.family.upper() in families:
+ familyid = families[args.family.upper()]
+ else:
+ try:
+ familyid = int(args.family, 0)
+ except ValueError:
+ error("Family ID needs to be a number or one of: " + ", ".join(families.keys()))
+
+ if args.list:
+ list_drives()
+ else:
+ if not args.input:
+ error("Need input file")
+ with open(args.input, mode='rb') as f:
+ inpbuf = f.read()
+ from_uf2 = is_uf2(inpbuf)
+ ext = "uf2"
+ if args.deploy:
+ outbuf = inpbuf
+ elif from_uf2:
+ outbuf = convert_from_uf2(inpbuf)
+ ext = "bin"
+ elif is_hex(inpbuf):
+ outbuf = convert_from_hex_to_uf2(inpbuf.decode("utf-8"))
+ elif args.carray:
+ outbuf = convert_to_carray(inpbuf)
+ ext = "h"
+ else:
+ outbuf = convert_to_uf2(inpbuf)
+ print("Converting to %s, output size: %d, start address: 0x%x" %
+ (ext, len(outbuf), appstartaddr))
+ if args.convert or ext != "uf2":
+ drives = []
+ if args.output == None:
+ args.output = "flash." + ext
+ else:
+ drives = get_drives()
+
+ if args.output:
+ write_file(args.output, outbuf)
+ else:
+ if len(drives) == 0:
+ error("No drive to deploy.")
+ for d in drives:
+ print("Flashing %s (%s)" % (d, board_id(d)))
+ write_file(d + "/NEW.UF2", outbuf)
+
+
+if __name__ == "__main__":
+ main()
diff --git a/bin/upload-to-bootloader.sh b/bin/upload-to-bootloader.sh
new file mode 100755
index 000000000..edaee75c6
--- /dev/null
+++ b/bin/upload-to-bootloader.sh
@@ -0,0 +1,4 @@
+
+echo "Converting to uf2 for NRF52 Adafruit bootloader"
+bin/uf2conv.py .pio/build/lora-relay-v1/firmware.hex -c -f 0xADA52840
+cp flash.uf2 /media/kevinh/FTH*BOOT/
diff --git a/boards/lora-relay-v1.json b/boards/lora-relay-v1.json
new file mode 100644
index 000000000..ca4e2f0ab
--- /dev/null
+++ b/boards/lora-relay-v1.json
@@ -0,0 +1,46 @@
+{
+ "build": {
+ "arduino": {
+ "ldscript": "nrf52840_s140_v6.ld"
+ },
+ "core": "nRF5",
+ "cpu": "cortex-m4",
+ "extra_flags": "-DARDUINO_NRF52840_LORA_RELAY_V1 -DNRF52840_XXAA",
+ "f_cpu": "64000000L",
+ "hwids": [["0x239A", "0x4404"]],
+ "usb_product": "LORA_RELAY",
+ "mcu": "nrf52840",
+ "variant": "lora_relay_v1",
+ "variants_dir": "variants",
+ "bsp": {
+ "name": "adafruit"
+ },
+ "softdevice": {
+ "sd_flags": "-DS140",
+ "sd_name": "s140",
+ "sd_version": "6.1.1",
+ "sd_fwid": "0x00B6"
+ },
+ "bootloader": {
+ "settings_addr": "0xFF000"
+ }
+ },
+ "connectivity": ["bluetooth"],
+ "debug": {
+ "jlink_device": "nRF52840_xxAA",
+ "onboard_tools": ["jlink"],
+ "svd_path": "nrf52840.svd"
+ },
+ "frameworks": ["arduino"],
+ "name": "Meshtastic Lora Relay V1 (Adafruit BSP)",
+ "upload": {
+ "maximum_ram_size": 248832,
+ "maximum_size": 815104,
+ "require_upload_port": true,
+ "speed": 115200,
+ "protocol": "jlink",
+ "protocols": ["jlink", "nrfjprog", "stlink"]
+ },
+ "url": "https://github.com/BigCorvus/SX1262-LoRa-BLE-Relay",
+ "vendor": "BigCorvus"
+}
diff --git a/docs/hardware/corvus.md b/docs/hardware/corvus.md
new file mode 100644
index 000000000..f1089f3ae
--- /dev/null
+++ b/docs/hardware/corvus.md
@@ -0,0 +1,35 @@
+# Notes on @BigCorvus boards
+
+## Board version 1.1
+
+variant name lora_relay_v1
+
+### Remaining TODOs
+
+- power hold for the ST7735
+- look at example sketch
+- turn on xmit boost
+
+## Recommendations for future boards
+
+@BigCorvus your board is **really** nice. Here's some ideas for the future:
+
+- make the SWDIO header more standard (the small ARM 2x5 micro footprint?) or at least througholes so it is easy to solder a header
+
+## How to program bootloader
+
+Download from here: https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases
+
+```
+nrfjprog -f nrf52 --eraseall
+Erasing user available code and UICR flash areas.
+Applying system reset.
+
+nrfjprog -f nrf52 --program feather_nrf52840_express_bootloader-0.3.2_s140_6.1.1.hex
+Parsing hex file.
+Reading flash area to program to guarantee it is erased.
+Checking that the area to write is not protected.
+Programming device.
+```
+
+Then reboot the board, if all went well it now shows up as a mountable filesystem on your USB bus.
diff --git a/variants/lora_relay_v1/variant.h b/variants/lora_relay_v1/variant.h
index ddc46e68e..7d2dcaf14 100644
--- a/variants/lora_relay_v1/variant.h
+++ b/variants/lora_relay_v1/variant.h
@@ -88,14 +88,6 @@ static const uint8_t A5 = PIN_A5;
(15) // FIXME, see warning hre https://github.com/BigCorvus/SX1262-LoRa-BLE-Relay/blob/master/LORA_RELAY_NRF52840.ino
static const uint8_t AREF = PIN_AREF;
-/*
-@geeksville
-TODO FIXME
-flash bootloader as if feather
-power hold ST7735
-look at example sketch
-*/
-
/*
* Serial interfaces
*/