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尽管有 udev 规则，avrdude 仍无法在非 root 下连接到 USBasp

tag-icon • tag-icon fedora usb udev
尽管有 udev 规则，avrdude 仍无法在非 root 下连接到 USBasp

根基工程：

[root@host14 rules.d]# avrdude -c USBASP -p m328p

avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: error: programm enable: target doesn't answer. 1 
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.


avrdude done.  Thank you.

非 root 不会：

[user0@host14 ~]$ avrdude -c USBASP -p m328p
avrdude: Warning: cannot open USB device: Permission denied
avrdude: error: could not find USB device "USBasp" with vid=0x16c0 pid=0x5dc

avrdude done.  Thank you.

该规则已添加如下/etc/udev/rules.d/21-usbasp.rules：

SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="05dc", GROUP="users", MODE="0666"

我究竟做错了什么？

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