move the rpitools repo to boxtools/rpi

as we will need anyway boxtools also for rpis

rpi/write_to

@@ -0,0 +1,161 @@
+#!/usr/bin/env python3
+import sys
+import os
+import time
+import re
+from select import select
+from glob import glob
+from subprocess import check_output, STDOUT, PIPE, Popen, TimeoutExpired
+
+IMAGES_HOST = 'l_samenv@samenv'
+IMAGES_DIR = 'boxes/rpi_images'
+IMAGES_PAT = '*.lz4'
+
+extdisks = {}
+
+
+def prt(text):
+    print(time.strftime('%H:%M:%S'), text)
+
+
+def cmd(command, verbose=False):
+    if verbose:
+        print(f'> {command}')
+    return check_output(command.split(), stderr=STDOUT).decode('latin-1')
+
+
+def find_raspi(kind):
+    # collect info about disks
+    dlist = '\n' + cmd('/usr/sbin/diskutil list')
+    extdisks.clear()
+    proposed = []
+    noname = re.compile(r' +0: +\*\d+\.?\d* GB +disk')
+    for dinfo in dlist.split('\n/dev/'):
+        if not dinfo:
+            continue
+        disk, info = dinfo.split(maxsplit=1)
+        if 'external' in info.split('\n')[0]:
+            extdisks[disk] = info
+            if kind == 'emmc':
+                if 'Windows_FAT_32 bootfs' in info and 'Linux' in info:
+                    proposed.append(disk)
+                elif noname.search(info):
+                    proposed.append(disk)
+            elif kind == 'sd':
+                if 'Apple' not in info:
+                    proposed.append(disk)
+    return proposed
+
+
+def rpiboot():
+    if os.path.exists('/Volumes/bootfs'):
+        prt('unmount bootfs')
+        os.system('diskutil unmount bootfs')
+    lines = []
+    with Popen(['rpiboot'], stdout=PIPE) as p:
+        tmo = 1
+        t = 0
+        while select([p.stdout], [], [], tmo)[0]:
+            rawline = p.stdout.readline()
+            if not rawline:
+                return tmo != 1
+            line = rawline.decode('latin-1').strip()
+            if lines is None:
+                print(line)
+            elif 'Waiting' in line:
+                tmo = 2
+                lines.append(line)
+                t = time.time()
+            elif tmo == 1:
+                lines.append(line)
+            else:
+                print('\n'.join(lines))
+                print(line)
+                lines = None
+        else:
+            p.terminate()
+            return False
+
+
+def list_external():
+    print('--- external disks:')
+    for disk, info in extdisks.items():
+       print(disk, info)
+
+
+rescue = """
+Remark: not all cables might work.
+Example on Markus Mac:
+- does not work: black USB C to USB C cable
+- works: white USB A to USB C cable plugged into docking station.
+
+Please unpower the box with compute module,
+start this script again and put power immediately."""
+
+def write_image(kind):
+    if kind == 'eemc':
+        print("\nmake sure microUSB 'SLAVE' is connected to this computer")
+        print("and microUSB 'POWER' is connected to a USB power supply\n")
+        prt('try to find CM (compute module on PoE device) ...')
+    else:
+        pass
+    proposed = find_raspi(kind)
+    if not proposed and kind == 'emmc':
+        # we may install rpiboot here if not available
+        # git clone --depth=1 https://github.com/raspberrypi/usbboot
+        # cd usbboot
+        # make
+        # ./rpiboot
+
+        print('not found - put rpi in bootloader mode')
+        if not rpiboot() and not rpiboot():
+            print(rescue)
+            return
+        for _ in range(10):
+            proposed = find_raspi(kind)
+            if proposed:
+                break
+            time.sleep(0.1)
+        else:
+            list_external()
+            print('can not find CM')
+            return
+    list_external()
+    if len(proposed) > 1:
+        if kind == 'emmc':
+            print('several potential devices for CM:', proposed)
+            return
+        dev = input('select device to write to {" ".join(proposed)}: ')
+    else:
+        dev = proposed[0]
+    images = check_output(['sudo', '-u', 'zolliker', 'ssh', IMAGES_HOST, f'cd {IMAGES_DIR} ; ls {IMAGES_PAT}']).decode('latin-1').split('\n')
+    for file in sorted(images):
+        print(file)
+    print('')
+    image = input(f'select image to write to {dev} [{file}]: ') or file
+    prt(f'unmount {dev} ...')
+    print('you may be prompted for your account password for sudo')
+    os.system(f'sudo diskutil unmountDisk /dev/{dev}')
+    print('')
+    prt('get, uncompress and write... (takes about 15 min)')
+    os.system(f'ssh {IMAGES_HOST} "dd if={IMAGES_DIR}/{image} bs=512k" | lz4 -d | sudo dd of=/dev/{dev} bs=512k')
+    prt('unmount bootfs')
+    for _ in range(3):
+        if os.path.exists('/Volumes/bootfs'):
+           prt('unmount bootfs')
+           os.system('diskutil unmount bootfs')
+           break
+        time.sleep(1.0)
+    prt('done')
+    os.system(f'diskutil unmountDisk /dev/{dev}')
+
+if len(sys.argv) == 2:
+    write_image(sys.argv[1])
+else:
+    print("""
+Usage:
+
+> write_to emmc   # write to compute module using PoE board"
+> write_to sd     # write to sd card
+
+""")