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avrftdi: Set guard time to fixed 2 bits.

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avrftdi_private.h, avrftdi.c: remove pdata->guard_bits refernces, since
they are no longer needed
avrftdi_tpi.c: Use fixed guard time of 2 bits, this gives 16 bits per
frame. tpi_byte2frame() and tpi_frame2byte() functions are now
symmetrical and extraction of received data in avrftdi_read_byte is less
complicted. Write the new guard time to the TPI in
avrftdi_tpi_program_enable().

git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1150 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Hannes Weisbach
2013-05-02 11:06:52 +00:00
parent 27f7e6e5a4
commit 923aa2edab
3 changed files with 28 additions and 46 deletions
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2
avrftdi_private.h
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@@ -50,8 +50,6 @@ typedef struct avrftdi_s {
int pin_limit;
/* internal RX buffer of the device. needed for INOUT transfers */
int rx_buffer_size;
/* number of guard bits for TPI. should be moved to struct PROGRAMMER */
int guard_bits;
/* function pointer to the set_pin function, so that we do not have to drag
* it into global scope. it's a hack, but i think it's slightly better than
* the alternative.