{"id":12317,"date":"2015-02-14T16:42:27","date_gmt":"2015-02-14T23:42:27","guid":{"rendered":"http:\/\/ainslies.net\/?p=12317"},"modified":"2015-02-15T09:10:14","modified_gmt":"2015-02-15T16:10:14","slug":"recovering-a-bricked-cc3d-board-using-a-bus-blaster","status":"publish","type":"post","link":"https:\/\/ainslies.net\/?p=12317","title":{"rendered":"Recovering a bricked CC3D board using a bus blaster"},"content":{"rendered":"

\"IMG_20150214_155435\"<\/a>A few months ago I went to upgrade my OpenPilot CC3D board an something went amiss and I ended up trashing the bootloader. I didn’t have a SWD dongle to reprogram it with so its been collecting dust. I just purchased a v3 bus blaster<\/a> for a different project I’m working on and it has a SWD firmware so I thought I’d try and recover the CC3D. Below are the steps I used.<\/p>\n

Download and install the latest OpenOCD<\/strong><\/p>\n

git clone git:\/\/git.code.sf.net\/p\/openocd\/code openocd
\ncd openocd\/
\n.\/bootstrap
\n.\/configure --prefix=\/usr
\nmake
\nsudo make install<\/div><\/div>\n

\nRe-flash the Bus Blaster v3 for KT-link buffer<\/strong><\/p>\n

The instructions below came from here<\/a><\/p>\n

git clone https:\/\/github.com\/bharrisau\/busblaster.git
\ncd busblaster\/synthesis
\nopenocd -f board\/dp_busblaster_v3.cfg -c "adapter_khz 1000; init; svf system.svf; shutdown"<\/div><\/div>\n

Getting\/Building the bootloader<\/strong><\/p>\n

Now you need to get a bootloader to flash into the CC3D. You might be able to download bl_coptercontrol.hex but I’ve already got the OpenPilot development environment installed so I just built it using<\/p>\n

make all_bl all_bu<\/div><\/div>\n

If you don’t have the dev environment setup there are build<\/a> instructions.<\/p>\n

Here is the file I used bl_coptercontrol.hex<\/a> but the regular disclaimers apply, if this file damages or bricks your CC3D I am not responsible.<\/p>\n

OpenOCD config file<\/strong><\/p>\n

You need create a flashing script “cc3d-swd.cfg” to pass to OpenOCD.<\/p>\n

source \/usr\/share\/openocd\/scripts\/interface\/ftdi\/dp_busblaster_kt-link.cfg
\ntransport select swd
\nsource [find target\/stm32f1x.cfg]
\n
\nproc program_device () {
\n    reset init
\n        sleep 50
\n        flash probe 0
\n        sleep 50
\n        flash protect 0 0 last off
\n        sleep 50
\n        flash write_image erase unlock "path_to_hex_file\/bl_coptercontrol.hex"
\n        sleep 50
\n        reset run
\n}
\n
\ninit
\nprogram_device ()
\nexit<\/div><\/div>\n

Obiously replace “path_to_hex_file” to where you built or downloaded bl_coptercontrol.hex<\/p>\n

Connect the bus blaster to the CC3d<\/strong><\/p>\n

I got the cable connections from here<\/a>.<\/p>\n

     adapter         \u250a            target
\n                     \u250a
\n     GND \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 GND
\n                     \u250a
\n     TCK \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 SWCK
\n                     \u250a
\n     TMS \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500 SWDAT
\n                     \u250a<\/div><\/div>\n

Finally reflashing the CC3D bootloader<\/strong><\/p>\n

openocd -f cc3d-swd.cfg<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

A few months ago I went to upgrade my OpenPilot CC3D board an something went amiss and I ended up trashing the bootloader. I didn’t have a SWD dongle to reprogram it with so its been collecting dust. I just … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,1],"tags":[],"class_list":["post-12317","post","type-post","status-publish","format-standard","hentry","category-multirotors","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/ainslies.net\/index.php?rest_route=\/wp\/v2\/posts\/12317","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ainslies.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ainslies.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ainslies.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ainslies.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12317"}],"version-history":[{"count":9,"href":"https:\/\/ainslies.net\/index.php?rest_route=\/wp\/v2\/posts\/12317\/revisions"}],"predecessor-version":[{"id":12326,"href":"https:\/\/ainslies.net\/index.php?rest_route=\/wp\/v2\/posts\/12317\/revisions\/12326"}],"wp:attachment":[{"href":"https:\/\/ainslies.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12317"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ainslies.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12317"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ainslies.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}