From 16289c720a0f63d636faaaf4d4432496a8aa4231 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Fri, 19 Aug 2016 01:54:24 +0200
Subject: Ported bootloader from arcin.

---
 hidflash.py | 90 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100755 hidflash.py

(limited to 'hidflash.py')

diff --git a/hidflash.py b/hidflash.py
new file mode 100755
index 0000000..a9df48c
--- /dev/null
+++ b/hidflash.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+
+from hidapi import hidapi
+from elftools.elf.elffile import ELFFile
+
+import ctypes, time, sys
+
+e = ELFFile(open(sys.argv[1]))
+
+buf = ''
+
+for segment in sorted(e.iter_segments(), key = lambda x: x.header.p_paddr):
+	if segment.header.p_type != 'PT_LOAD':
+		continue
+	
+	data = segment.data()
+	lma = segment.header.p_paddr
+	
+	# Workaround for LD aligning segments to a larger boundary than 8k.
+	if lma == 0x8000000:
+		lma += 0x2000
+		data = data[0x2000:]
+	
+	# Add padding if necessary.
+	buf += '\0' * (lma - 0x8002000 - len(buf))
+	
+	buf += data
+
+# Align to 64B
+if len(buf) & (64 - 1):
+	buf += '\0' * (64 - (len(buf) & (64 - 1)))
+
+# Open device
+dev = hidapi.hid_open(0x1d50, 0x60f7, None)
+
+if not dev:
+	dev = hidapi.hid_open(0x1d50, 0x60f8, None)
+	
+	if not dev: 
+		raise RuntimeError('Device not found.')
+	
+	print 'Found runtime device, resetting to bootloader.'
+	
+	# Reset bootloader
+	if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x10'), 2) != 2:
+		raise RuntimeError('Reset failed.')
+	
+	time.sleep(1)
+	
+	hidapi.hid_exit()
+	
+	dev = hidapi.hid_open(0x1d50, 0x60f7, None)
+	
+	if not dev: 
+		raise RuntimeError('Device not found.')
+
+print 'Found bootloader device, starting flashing.'
+
+# Prepare
+if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x20'), 2) != 2:
+	raise RuntimeError('Prepare failed.')
+
+# Flash
+while buf:
+	if hidapi.hid_write(dev, ctypes.c_char_p('\x00' + buf[:64]), 65) != 65:
+		raise RuntimeError('Writing failed.')
+	buf = buf[64:]
+
+# Finish
+if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x21'), 2) != 2:
+	raise RuntimeError('Finish failed.')
+
+print 'Flashing finished, resetting to runtime.'
+
+# Reset
+if hidapi.hid_send_feature_report(dev, ctypes.c_char_p('\x00\x11'), 2) != 2:
+	raise RuntimeError('Reset failed.')
+
+time.sleep(1)
+
+hidapi.hid_exit()
+
+if hidapi.hid_open(0x1d50, 0x6080, None):
+	print 'Done, everything ok.'
+	
+elif hidapi.hid_open(0x1d50, 0x6084, None):
+	print 'Still in bootloader mode.'
+
+else:
+	print 'Device disappeared.'
-- 
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