avr_read_byte_default() and avr_write_byte_default (resp.) by directly
calling the latter functions from within all programmers that don't
implement their own read_byte()/write_byte() methods. In turn, make the
read_byte() and write_byte() methods mandatory, and the cmd() method
(direct ISP command) optional instead (it's effectively mandatory for
any programmer using avr_read_byte_default()/avr_write_byte_default()
though). Remove all the pointless cmd() method stubs from those programmers
that don't need it.
Eliminate avr_read_byte() as it was now completely identical to
pgm->read_byte().
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@684 81a1dc3b-b13d-400b-aceb-764788c761c2
* usbasp.c: Check for USBasp with new as well as old VID/PID
pair, warn the user about upgrading the firmware in case an
old one has been found.
* usbasp.h: Add new VID/PID.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@661 81a1dc3b-b13d-400b-aceb-764788c761c2
patch #4686: Add support for USBasp, a simple USB programmer
* usbasp.c: New file, implement the USBasp driver.
* usbasp.h: New file, interface declarations for USBasp.
* Makefile.am: Wire the new files into the build.
* avrdude.conf.in: Add the usbasp programmer entry.
* config_gram.y: Add the usbasp token.
* lexer.l: (Ditto.)
* avrdude.1: Document the USBasp programmer.
* doc/avrdude.texi: (Ditto.)
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@656 81a1dc3b-b13d-400b-aceb-764788c761c2
joerg_wunsch