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194 Commits 4 Branches 3 Tags 3 MiB
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7 Commits

Author SHA1 Message Date
Werner Almesberger
b390b28364 atusd/ERRATA: started errata section for 100912. Nothing major so far. 2010-09-14 13:44:16 -03:00
Werner Almesberger
0a0a50d73d Performance comparison of atusb vs. atusd. 
- atusd/tests/send-20100909: conducted performance comparison of atusb vs.
  atusd
- atusd/ERRATA: changed also first board to capacitative divider
 2010-09-09 20:38:50 -03:00
Werner Almesberger
6e726d1fb9 Improved clock stability by using a capacitative divider and found more minor 
issues.

- atusd/ERRATA: work around the clock instability by replacing the
  resistive divider with a capacitative divider
- atusd/ERRATA: a ground plane under the clock circuit would also be good to
  have
- atusd/ERRATA: via near pin 1 is too close to the chip if we need to cut
  wires (in DIY boards)
- atusd/sim/cdiv.sch: simulation of the capacitative divider
 2010-09-09 12:35:47 -03:00
Werner Almesberger
93f0f403a7 New atusd errata and a few small CAM updates. 
- atusd/ERRATA: added errata section for version 20100908
- atusd/cam/doit: increase tool clearance from 1.5 mm to 2 mm
- atusd/cam/pcb.pl (cut): cutting counter-clockwise did not reduce burr.
  Removed reversal of cutting direction.
- atusd/cam/pcb.pl: made area selection formulas easier to understand
 2010-09-09 09:23:18 -03:00
Werner Almesberger
9ad96bd5f9 Board bringup: talk to the chip and read IDs. 
- atusd/ERRATA: mention that the reset circuit can go, as expected
- atusd/tools/Makefile: add include path to at86rf230.h
- atusd/tools/lib/atusd.c: include atusd.h, for consistency checking
- atusd/tools/lib/atusd.c (spi_begin, spi_end, spi_data_in, spi_data_out,
  spi_send_partial, spi_recv, spi_finish, spi_send): low-level functions
  to access our modified SPI
- atusd/tools/lib/atusd.h, atusd/tools/lib/atusd.c (atusd_reg_write,
  atusd_reg_read): register read and write access
- atusd/tools/try.c: read and print chip IDs
 2010-09-05 16:59:59 -03:00
Werner Almesberger
a18d5969bd Next part of board bringup: reset and power cycling. 
- atusd/ERRATA: one more problem: the transistor footprint is wrong
- atusd/tools/lib/atusd.c (atusd_cycle, atusd_reset): added power cycling and
  hardware reset
- atusd/tools/lib/atusd.h: be nice and make a header file
- atusd/tools/try.c: be nice and use header files (caught a bug as well)
 2010-09-05 14:07:01 -03:00
Werner Almesberger
86e556ce92 First part of the board bringup: power and clock. 
- atusd/ERRATA: variations of the circuit being debugged from the design
- tools/Makefile, tools/try.c, tools/lib/atusd.c: user-space tool to enable
  the board and (in the future) establish communication
- atusd/sim/clk.sch: simulation of CLK attenuation circuit with capacitative
  load from scope probe
 2010-09-04 23:14:57 -03:00