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patch #9328: ft245r.c: add TPI support (patches 5-7)

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Submitted by David Mosberger-Tang:
* ft245r.c (ft245r_set_bitclock): add workaround for
FT245 hardware bugs in bitclock setting

Correct baud rate calculation (multiplying with factor of 2 was wrong)
and add compile-time workaround for FTDI chips suffering for the
variable pulse-width errata.  The workaround entails always running
the chip at 3MHz and stuffing the channel with repeated bytes to
achieve the desired baudrate.

This has no effect on programming speed.  Note, however, that now a
baudrate option -b750000 has to be used to achieve maximum speed.

(Option enabled by default now.)



git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@1488 81a1dc3b-b13d-400b-aceb-764788c761c2
This commit is contained in:
Joerg Wunsch
2021-11-25 09:17:11 +00:00
parent 2015a874e0
commit 49e5f2451c
3 changed files with 61 additions and 18 deletions
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6
NEWS
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@@ -14,10 +14,12 @@ Current:
debuggers (JTAGICE3 with firmware 3+, AtmelICE, EDBG, mEDBG)
- UPDI support added (AVR8X family)
- TPI support for USBtinyISP
- TPI support for ft245r
- AVR Doper uses libhidapi rather than raw libusb (patch #9033)
- -P net:host:port can use IPv6 now (Posix systems only)
- New configure option: -disable-libusb_1_0
- extended UPDI device context (> 64 Ki flash)
- major overhaul of ft245r driver (patch #9327/#9328)
* New devices supported:
@@ -108,11 +110,13 @@ Current:
patch #9110: Let reserved fuse bits to be read as *don't care*
patch #9253: Fix for giving terminal_mode commands more than 20 arguments
patch #9320: fix TPI RESET in bitbang.c
patch #9079: Fix ftdi_syncbb teardown (supersedes #9893)
patch #9079: Fix ftdi_syncbb teardown (supersedes #9893, superseded by #9328)
patch #9122: Fixed MISO sampling in ftdi_syncbb
patch #9123: ftdi_syncbb: use FT245R_CYCLES in ft245r_set_bitclock()
patch #8719: Support Over-the-Air bootloading with XBeeBoot
patch #9757: Fix ATtiny817 Xplained Mini programmer
patch #9327: ft245r.c: add TPI support (patches 1-4)
patch #9328: ft245r.c: add TPI support (patches 5-7)
* Internals:
- New avrdude.conf keyword "family_id", used to verify SIB attributes