{"id":2578,"date":"2022-07-23T00:37:02","date_gmt":"2022-07-23T04:37:02","guid":{"rendered":"https:\/\/www.yorku.ca\/professor\/drsmith\/?p=2578"},"modified":"2022-07-23T02:43:07","modified_gmt":"2022-07-23T06:43:07","slug":"installing-simavr-on-mac-os-x","status":"publish","type":"post","link":"https:\/\/www.yorku.ca\/professor\/drsmith\/2022\/07\/23\/installing-simavr-on-mac-os-x\/","title":{"rendered":"Installing SIMAVR on Mac OS X"},"content":{"rendered":"\n

The SIMAVR package is for simulating AVR processors like the ATMEGA328 on the Arduino UNO. I'm looking to try to use it with VPL in courses like our computer architecture class, EECS 2021, as a way of simulating the UNO's processor in exercises involving assembler and C programming.<\/p>\n\n\n\n

On a Mac, we use HomeBrew. The instructions for downloading SIMAVR as well as GCC and GDB are here: https:\/\/kona.moe\/installation-of-avr-toolchain-gtkwave-and-gnu-debugger-gdb-on-m1-macbooks\/<\/a><\/p>\n\n\n\n

The \"home-brew\" AVR package homepage is here: https:\/\/github.com\/osx-cross\/homebrew-avr <\/a>.<\/p>\n\n\n\n

<\/p>\n\n\n\n

Here's a walkthrough with an example project: https:\/\/web.archive.org\/web\/20200814070955\/https:\/\/aykevl.nl\/2020\/06\/simavr-debug <\/a>(original<\/a>)<\/p>\n\n\n\n

Here's an example of using SIMAVR with breakpoints within GDB: https:\/\/blog.oddbit.com\/post\/2019-01-22-debugging-attiny-code-pt-1\/<\/a><\/p>\n\n\n\n

<\/p>\n\n\n\n

When installing GDB it's important to note this :<\/p>\n\n\n\n

<\/p>\n\n\n\n

gdb requires special privileges to access Mach ports.<\/p>\n\n\n\n

You will need to codesign the binary. For instructions, see:<\/p>\n\n\n\n

https:\/\/sourceware.org\/gdb\/wiki\/BuildingOnDarwin<\/a><\/p>\n\n\n\n

On 10.12 (Sierra) or later with SIP, you need to run this:<\/p>\n\n\n\n

\u00a0 echo \"set startup-with-shell off\" >> ~\/.gdbinit<\/p>\n\n\n\n

<\/p>\n\n\n\n

Firing up the simulator: <\/p>\n\n\n\n

\"terminal
terminal view with simavr running on the blink.elf file.<\/figcaption><\/figure><\/div>\n\n\n\n

Then firing up the debugger interface:<\/p>\n\n\n\n

\"The
The debugger about to interface with the simulator on port 1234 (in the other terminal window)<\/figcaption><\/figure><\/div>\n\n\n\n

Now connect with the simulator<\/p>\n\n\n\n

\"debugger
debugger connected to the simulator<\/figcaption><\/figure><\/div>\n\n\n\n

Now, the next stage will be to see if we can integrate unit testing with this. (e.g https:\/\/maddevs.io\/blog\/avr-mcu-testing\/<\/a>)<\/p>\n\n\n\n

More info on GDB scripting: https:\/\/developers.redhat.com\/blog\/2021\/04\/30\/the-gdb-developers-gnu-debugger-tutorial-part-1-getting-started-with-the-debugger#starting_gdb <\/p>\n\n\n\n

<\/p>\n\n\n\n

and to output only print statements to a file: And if you want the output to go\u00a0only<\/em>\u00a0to the log file, use\u00a0set logging redirect on<\/code> (https:\/\/stackoverflow.com\/questions\/5941158\/gdb-print-to-file-instead-of-stdout)<\/p>\n\n\n\n

<\/p>\n\n\n\n

here, we capture the contents of an AVR register in a file after a certain number of steps following a breakpoint:<\/p>\n\n\n\n

\"\npython
gdbinit file to capture DDRB to a file.<\/figcaption><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"

The SIMAVR package is for simulating AVR processors like the ATMEGA328 on the Arduino UNO. I'm looking to try to use it with VPL in courses like our computer architecture class, EECS 2021, as a way of simulating the UNO's processor in exercises involving assembler and C programming. On a Mac, we use HomeBrew. The […]<\/p>\n","protected":false},"author":762,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","footnotes":""},"categories":[42,43,45,48,294],"tags":[452,451],"class_list":["post-2578","post","type-post","status-publish","format-standard","hentry","category-arduino","category-assembler","category-c-2","category-embedded","category-vpl","tag-air-simulator","tag-simavr"],"taxonomy_info":{"category":[{"value":42,"label":"arduino"},{"value":43,"label":"assembler"},{"value":45,"label":"c"},{"value":48,"label":"embedded"},{"value":294,"label":"VPL"}],"post_tag":[{"value":452,"label":"air simulator"},{"value":451,"label":"simavr"}]},"featured_image_src_large":false,"author_info":{"display_name":"drsmith","author_link":"https:\/\/www.yorku.ca\/professor\/drsmith\/author\/drsmith\/"},"comment_info":"","category_info":[{"term_id":42,"name":"arduino","slug":"arduino","term_group":0,"term_taxonomy_id":42,"taxonomy":"category","description":"","parent":0,"count":30,"filter":"raw","cat_ID":42,"category_count":30,"category_description":"","cat_name":"arduino","category_nicename":"arduino","category_parent":0},{"term_id":43,"name":"assembler","slug":"assembler","term_group":0,"term_taxonomy_id":43,"taxonomy":"category","description":"","parent":0,"count":30,"filter":"raw","cat_ID":43,"category_count":30,"category_description":"","cat_name":"assembler","category_nicename":"assembler","category_parent":0},{"term_id":45,"name":"c","slug":"c-2","term_group":0,"term_taxonomy_id":45,"taxonomy":"category","description":"","parent":0,"count":51,"filter":"raw","cat_ID":45,"category_count":51,"category_description":"","cat_name":"c","category_nicename":"c-2","category_parent":0},{"term_id":48,"name":"embedded","slug":"embedded","term_group":0,"term_taxonomy_id":48,"taxonomy":"category","description":"","parent":0,"count":38,"filter":"raw","cat_ID":48,"category_count":38,"category_description":"","cat_name":"embedded","category_nicename":"embedded","category_parent":0},{"term_id":294,"name":"VPL","slug":"vpl","term_group":0,"term_taxonomy_id":294,"taxonomy":"category","description":"","parent":0,"count":25,"filter":"raw","cat_ID":294,"category_count":25,"category_description":"","cat_name":"VPL","category_nicename":"vpl","category_parent":0}],"tag_info":[{"term_id":452,"name":"air simulator","slug":"air-simulator","term_group":0,"term_taxonomy_id":452,"taxonomy":"post_tag","description":"","parent":0,"count":1,"filter":"raw"},{"term_id":451,"name":"simavr","slug":"simavr","term_group":0,"term_taxonomy_id":451,"taxonomy":"post_tag","description":"","parent":0,"count":2,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/posts\/2578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/users\/762"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/comments?post=2578"}],"version-history":[{"count":6,"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/posts\/2578\/revisions"}],"predecessor-version":[{"id":2588,"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/posts\/2578\/revisions\/2588"}],"wp:attachment":[{"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/media?parent=2578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/categories?post=2578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.yorku.ca\/professor\/drsmith\/wp-json\/wp\/v2\/tags?post=2578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}