Change to the directory where avrdude is located. If you don’t know, you can search for it with: sudo find \/ -name avrdude<\/p>\n\n\n\n
(find can take a long time to search the whole filesystem. You can interrupt it with Ctrl-c).<\/p>\n\n\n\n
For example, on my system (Linux Mint, May 2022) it was in a subdirectory of the arduino-1.8.19 of my home directory, change directory to the one containing avrdude:<\/p>\n\n\n\n
cd ~\/arduino-1.8.19\/hardware\/tools\/avr\/bin<\/p>\n\n\n\n
Find where avrdude.conf is stored on your system: sudo find \/ -name avrdude.conf On my system, there were multiple files, but the one in the ‘avr’ path was at:<\/p>\n\n\n\n
~\/arduino-1.8.19\/hardware\/tools\/avr\/etc\/avrdude.conf<\/p>\n\n\n\n
(in Linux, you can always use the tilde character, ~ as the shortcut for your \/home\/username folder). Given that we’ve already changed directory to the avr\/bin folder, we can put in a shorter relative path to the conf file:<\/p>\n\n\n\n
..\/etc\/avrdude.conf<\/p>\n\n\n\n
Then connect the USBasp and enter the avrdude command:<\/p>\n\n\n\n
.\/avrdude -c usbasp -p t85 -C ..\/etc\/avrdude.conf<\/p>\n\n\n\n
For this example I was reading the fuses of an ATtiny85, but if you’re using a ‘normal’ Arduino Uno or Nano, you change t85 to m328p<\/p>\n\n\n\n
Explanation of command.<\/p>\n\n\n\n
-c sets the programmer type, in this case usbasp<\/p>\n\n\n\n
-p specifies the ‘part number’: the name of the target device.<\/p>\n\n\n\n
-C specifies the location of the avrdude.conf configuration file.<\/p>\n\n\n\n
You should see about five lines of output, one of which displays the fuse settings:<\/p>\n\n\n\n
avrdude: safemode: Fuses OK (E:FF, H:DF, L:F1)<\/p>\n\n\n\n
E is short for ‘Extended’, H for ‘High’ and ‘L’ for low. If you want to see more detail you can add -v as an option to the command (at the end, separated by a space) to give ‘verbose output’.<\/p>\n","protected":false},"excerpt":{"rendered":"
Change to the directory where avrdude is located. If you don’t know, you can search for it with: sudo find \/ -name avrdude (find can take a long time to search the whole filesystem. You can interrupt it with Ctrl-c). For example, on my system (Linux Mint, May 2022) it was in a subdirectory of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4],"tags":[],"class_list":["post-560","post","type-post","status-publish","format-standard","hentry","category-arduino","category-programming"],"_links":{"self":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/560","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/comments?post=560"}],"version-history":[{"count":4,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/560\/revisions"}],"predecessor-version":[{"id":565,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/posts\/560\/revisions\/565"}],"wp:attachment":[{"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/media?parent=560"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/categories?post=560"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceptimus.co.uk\/index.php\/wp-json\/wp\/v2\/tags?post=560"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}