USBASP error: program enable: no answer. 1

bzijlstra · Posted: Tue Dec 06, 2016 7:27 pm Post subject: Check forum

Have you done a search in this forum? I see something about libusb and also something about a firmware upgrade.

Ben Zijlstra

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

The clock speed setting is problematic if you have a 20Mhz crystal on the 1284P
you will have to play with the clock speeds to find which one works.
Or you can change the fuse bit and use the internal 8mhz RC while programming
then change back after programming is complete
at lower cpu clock speeds I have found it more stable.
Regards Paul

Paulvk · Joined: 28 Jul 2006 Posts: 1257 Location: SYDNEY

If the 1284P is new and has default fuse bits
8Mhz RC with divide by 8 set so 1Mhz clock

Note I have not used a 10K pullup on my boards with 1284P have both 40pin dip and 44pin tqfp

Regards Paul

EDC · Joined: 26 Mar 2014 Posts: 1136

TopicOwner check that use version 2076.
In history.txt attached to version 2079 you can read "- usbasp programmer updated. chosen clock frequency will work. "
I dont know why someone want to use older Bascom version but then I will use some other tools to set fuse bits.
..and some of this chinese USBasp have old firmware that even not handle set CLK by software so you must reprogram it with soft from fishl.de site software.