{"id":184,"date":"2011-10-12T16:11:51","date_gmt":"2011-10-12T23:11:51","guid":{"rendered":"http:\/\/zethus.ca\/wp\/?p=184"},"modified":"2018-10-20T21:49:21","modified_gmt":"2018-10-21T04:49:21","slug":"olimess","status":"publish","type":"post","link":"http:\/\/zethus.ca\/wp\/?p=184","title":{"rendered":"Olimess"},"content":{"rendered":"

\"\"<\/a>I blew up my Olimex ISP500 programmer the other night. \u00a0I left it plugged into my mac and target board. The next night when I went to use it, there was no life. \u00a0 On a whim, I replaced the AT90USB162. \u00a0When I plugged it in, it actually came up in DFU mode. Wonderful. \u00a0So now I’m in the process of reverse engineering the schematic for this so that I can reflash some sort of programming firmware on to it. \u00a0The default olimex firmware seems to be encrypted. \u00a0I may still see if I can read the firmware image off of a working unit, but I suspect it is all protected.<\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

Ok a quick update… \u00a0I hacked on a RST and HWB button. You can see them in the first photo. The is a 10k pullup added to a conveniently existing pad below the hwb (lower) button in the photo. \u00a0The DFU loading works wonderfully now. \u00a0I’ve uploaded a modified version of the AVRISP2 programmer code from the LUFA<\/a> project. \u00a0I can talk to the programmer now, but not any devices. The ADC for the target voltage still needs work.<\/p>\n

One further update the programmer now works, \u00a0I had to tweak the software to invert the miso data from the target, since there is a schmitt trigger invert, probably as a cheap level shifter.<\/p>\n

Now that everything works, you will find attached:<\/p>\n

 <\/p>\n

    \n
  1. Reverse engineered schematic for the olimex (<\/span>Olimex ISP500 Schematic<\/a>)<\/span><\/li>\n
  2. The patch to the <\/span>LUFA 111009<\/a> code for olimex isp 500 board support (buttons and leds) and the miso patch for the schmitt trigger inverter. (<\/span>olimex.patch<\/a> v2)<\/span><\/li>\n
  3. AVRISP-MKII.hex<\/a>
    \n<\/span><\/li>\n
  4. and some sample output\/usage:<\/span><\/li>\n<\/ol>\n

     <\/p>\n

    Make the programmer code and program the Olimex ISP 500<\/h5>\n
    Chucks-Mac:AVRISP-MKII chuck$ make dfu\r\ndfu-programmer at90usb162 erase\r\ndfu-programmer at90usb162 flash AVRISP-MKII.hex\r\nValidating...9870 bytes used (80.32%)\r\ndfu-programmer at90usb162 reset<\/pre>\n
    Use the newly repaired Olimex to read a target board<\/h5>\n
    Chucks-Mac:AVRISP-MKII chuck$ avrdude -c avrisp2 -P usb -p at90usb1287\r\navrdude: AVR device initialized and ready to accept instructions\r\nReading | ################################################## | 100% 0.01s\r\navrdude: Device signature = 0x1e9782\r\navrdude: safemode: Fuses OK\r\navrdude done. \u00a0Thank you.\r\nChucks-Mac:AVRISP-MKII chuck$<\/pre>\n
    Other Notes<\/h5>\n
    This code was built using LIBUSB since I’m on a Mac. It’s nice to know you can spent 3 days, and $3 for parts to fix a $40 programer \ud83d\ude44 I guess that is why they call it a hobby.<\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n
     <\/p>\n","protected":false},"excerpt":{"rendered":"
    I blew up my Olimex ISP500 programmer the other night. \u00a0I left it plugged into my mac and target board. The next night when I went to use it, there was no life. \u00a0 On a whim, I replaced the … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[8,6,9,7],"class_list":["post-184","post","type-post","status-publish","format-standard","hentry","category-avr","tag-at90usb","tag-avr-2","tag-isp","tag-lufa"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts\/184","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=184"}],"version-history":[{"count":23,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts\/184\/revisions"}],"predecessor-version":[{"id":770,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=\/wp\/v2\/posts\/184\/revisions\/770"}],"wp:attachment":[{"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=184"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zethus.ca\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}