patchAVR Downloader/UploaDEr - Patches: patch #10017, uspasp / tpi: Automatically clear...


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patch #10017: uspasp / tpi: Automatically clear configuration byte (fuse) before writing it

Submitted by:  Martin Thierer <thierer>
Submitted on:  Sun 31 Jan 2021 02:29:23 PM UTC  
Category:  None Priority:  3 - Low
Status:  None Privacy:  Public
Assigned to:  None Open/Closed:  Open

Sun 31 Jan 2021 02:29:23 PM UTC, original submission:  

For the ATtiny 4/5/9/10 MCUs the "configuration byte" (fuse byte) has to be erased before it can be changed (see in the datasheet).

Respective support has been added for the usbasp programmer via #9185, but through extended parameters for the erase command.

I find it much more useful to just transparently erase the configuration byte before writing it, like avr_write_byte_default() does (which isn't used by the usbasp code).

The attached patch adds that functionality. Tested with an ATtiny 10.

Martin Thierer <thierer>


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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2021-01-31 thierer Attached File- => Added reset-configuration-byte.patch, #50814

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