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avr.c: Adds avr_tpi_program_enable

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Generic function enabling external programming on TPI devices. This
function sets the required guard time (which is passed in as parameter),
checks the TPI identification register, writes SKEY command + SKEY, and
finally polls the NVMEN bit in TPISR.

avr.h: Add prototype definitions of avr_tpi_program_enable() and
avr_tpi_chip_erase().
avrftdi_tpi.c: Removes tpi_skey_cmd array, containing the SKEY command
and the SKEY bytes.
tpi.h: Adds tpi_skey_cmd array, containing the SKEY command and the SKEY
bytes, but in the reverse order of tpi_skey.

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1167 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Hannes Weisbach
2013-05-06 12:49:26 +00:00
parent 5b7952ade8
commit be385b2b48
5 changed files with 60 additions and 2 deletions
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ChangeLog
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@@ -45,7 +45,13 @@
* avrftdi_tpi.c: Do all I/O in terms of pgm->cmd_tpi()-calls instead of
avrftdi_tpi_[read,write]_byte().
Remove unnecessary set_pin call to set MOSI high, speeds up I/O.
Removes SKEY array, moves it to tpi.h.
* avr.c: Adds avr_tpi_chip_erase() generic TPI chip erase function.
Adds avr_tpi_program_enable() - generic TPI external programming enable
function. Sets guard time, reads identification register, sends SKEY command
and key, checks NVMEN bit. The required guard time has to be passed as
parameter.
* tpi.h: Adds SKEY array including CMD_SKEY in "correct" order.
2013-05-02 Hannes Weisbach <hannes_weisbach@gmx.net>