- cntr/cntr.pro, cntr/cntr.brd: reduced PCB edge line width from 15 mil to
5 mil
- cntr/cntr.brd: make edge follow hole for MMCX connector
- cntr/cntr.brd: fill bottom and input area with ground
- cntr/cntr.sch, cntr/cntr.brd (R4): replace 0 Ohm jumper and GND via
P2.1 with vias
- cntr/cntr.pro: added usb_a_plug.lib, mmcx-f-edge.mod, usb_a_plug_smt.mod,
and sot-323.mod
- cntr/cntr.sch, cntr/cntr.brd: reassigned LED and pull GPIO for easier
routing
- cntr/cntr.sch, cntr/cntr.brd: replaced mini-USB receptacle with USB A
plug and removed 0 Ohm resistor previously used for swapping D+/D-
- cntr/cntr.sch, cntr/cntr.brd: changed TVSs on USB from 200 pF 0603 to
100 pF 0402 type
- cntr/cntr.sch, cntr/cntr.brd: replaced basically unterminated 100 mil
header with properly terminated MMCX connector
- cntr/cntr.brd: reduced board width (nominally 15.8 mm) to USB connector
width (16 mm)
- modules/mmcx-f-edge.fpd: swap contacts for compatibility with "BNC"
symbol
- cntr/cntr.sch (VR1, VR2, VR3): reverted change to 0402, because this
would be too difficult to route with current board
- cntr/cntr.sch (VR1, VR2, VR3): change voltage from 5.6 V to 5.5 V,
for compatibility with selected part
- cntr/cntr.brd: updated for value change
- term/Makefile: "make qucs" shortcut for invoking qucs
- term/term.sch: disable switch to .dpl page after simulation
- term/term.sch: changed R3 from 50 Ohm to the more common 47 Ohm
- term/term.sch: changed C2 from 22 pF to 330 pF to match TVS
- term/term.sch: renamed Vin to Vdst and put graph in diagram on top
- term/term.sch: added more annotations
- cntr/cntr.sch: LED part number is LTST-C190KRKT, not LTST-C190KTKR
- cntr/cntr.sch: changed Vdc of VR4 from 5.6 V to 5.5 V (to match EPCOS
CT0603M4G
- cntr/cntr.sch: changed VR1 through VR3 to 0402 for lower capacitance
error bound.
- cntr/tools/cntr/cntr.c (measure): use the middle of a round-trip interval
for the sample's nominal time
- cntr/tools/cntr/cntr.c (measure): error bound is only +/- RTT/2, not
+/- RTT
- cntr/README: description of the counter board and its application
- cntr/fw/common/crc32.c: variant of CRC32-IEEE802.3 shared by firmware and
measurement application
- cntr/fw/cntr/ep0.c (my_setup), cntr/tools/cntr/cntr.c (get_sample):
protect the counter value with a CRC and an one's complement copy
- cntr/fw/include/cntr/ep0.h: oops, wasn't checked into repository
- cntr/tools/cntr/cntr.c: added section titles
- cntr/tools/cntr/cntr.c (measure): show communication statistics at the end
- cntr/tools/cntr/cntr.c (measure, usage, main): new option -d to enable
reporting of communication errors
- cntr/tools/cntr/cntr.c (set_stop, measure): let user stop measurement with
SIGINT
- cntr/tools/cntr/cntr.c (measure): get multiple "first samples" and keep
the one with the shortest round-trip time
- cntr/tools/cntr/cntr.c (measure): changed unit "ppk" (1/1000) to percent
(1/100)
- cntr/tools/cntr/cntr.c (usage, main): command-line argument is now the
accuracy goal, while the system clock deviation is set with the new
option -c
- TODO: some more things to do
- cntr/tools/Makefile: the usual recursive Makefile
- cntr/tools/cntr/Makefile, cntr/tools/cntr/cntr.c: user-space tool to
periodically read the free-running counter and to calculate frequency
and deviation from it
quite formidable low-pass filter that almost completely eliminated the
1 MHz signal.
- cntr/cntr.sch, cntr/cntr.brd: changed R1 from 100k to 1k to increase
input bandwidth
- TODO: "cntr" now makes it to DFU and beyond
- atrf/fw/common/config.h (PLATFORM_SETUP): rename to PLATFORM_ENTER
- cntr/fw/common/config.h (PLATFORM_SETUP): rename to PLATFORM_ENTER and
make the new PLATFORM_SETUP turn off the watchdog
