whitequark
ed64880cc4
build.{plat,res}: add support for connectors.
...
Fixes #77 .
2019-06-03 15:02:15 +00:00
whitequark
639e64c388
vendor.fpga.lattice_ice40: implement differential output buffers.
2019-06-03 09:28:27 +00:00
whitequark
41adcc3f97
vendor.fpga.lattice_ice40: implement differential input buffers.
2019-06-03 08:38:12 +00:00
whitequark
3116d4add2
vendor.fpga.lattice_ice40: allow instantiating SB_GB_IO via extras.
2019-06-03 07:54:28 +00:00
whitequark
185abb492d
vendor.fpga.lattice_ice40: implement SDR and DDR I/O buffers.
2019-06-03 07:43:31 +00:00
whitequark
6fae06aea9
build.{dsl,plat,res}: allow dir="oe".
...
Although a dir="oe" pin is generally equivalent to dir="io" pin with
the i* signal(s) disconnected, they are not equivalent, because some
pins may not be able to support input buffers at all, either because
there are no input buffers, or because the input buffers are consumed
by some other resource.
E.g. this can happen on iCE40 when the input buffer is consumed by
a PLL.
2019-06-03 04:42:55 +00:00
whitequark
9ba2efd86b
build.{res,plat}: use xdr=0 as default, not xdr=1.
...
The previous behavior was semantically incorrect.
2019-06-03 03:36:32 +00:00
whitequark
3327deae92
vendor.fpga.lattice_ice40: enable SystemVerilog when reading .sv files.
2019-06-03 03:01:56 +00:00
whitequark
dc17d06fe9
vendor.fpga.lattice_ice40: instantiate SB_IO and apply extras.
...
The PULLUP and PULLUP_RESISTOR extras are representable in the PCF
file. The IO_STANDARD extra, however, can only be an SB_IO parameter.
2019-06-03 02:51:59 +00:00
whitequark
e4ebe03115
vendor.fpga.lattice_ice40: use .bin suffix for bitstream tempfiles.
2019-06-02 04:12:50 +00:00
Simon Kirkby
358b98e5de
vendor.tinyfpga_b: implement.
2019-06-02 01:20:09 +00:00
whitequark
321d245e95
vendor.fpga.lattice_ice40: implement.
2019-06-01 16:47:01 +00:00
