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osmo-e1-hardware
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11 Commits

Author SHA1 Message Date
Sylvain Munaut bd399e96da gateware/icE1usb: Add custom pre-pack optimizations to fix build 
Without theses there are too many control-sets generated by yosys and
nextpnr can't find any valid placement.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-09 13:40:16 +02:00
Sylvain Munaut d420ffc57d gateware/icE1usb: Make single channel a build option 
By default build full bitstream, but from env or cli, allow to only
enable RX/TX units in channel 0 to speedup dev / testing.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-09 13:26:39 +02:00
Sylvain Munaut 3edf9dd681 gateware/icE1usb: Fix readback of E1 led misc register 
e1_led_run is already included in e1_led signal ... (bit 8)

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-09 13:26:39 +02:00
Sylvain Munaut 0f29d6aca8 gateware: Small tweaks and add option to ignore timing failure 
This also allow to override the SEED from command line.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-09 13:26:39 +02:00
Sylvain Munaut 5853197f84 gateware/icE1usb: Replace custom I2C core with SB_I2C wrapper 
The hard IP kind of sucks ... but we don't need i2c much (or at
all really) and using the hard IP is nearly free (LC-wise).

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-03 20:52:43 +02:00
Sylvain Munaut 205a131f77 gateware/icE1usb{,-proto}: Make PDM registers write-only 
Really we never need to read them and it takes logic to implement
the read-mux for nothing ...
 2020-10-03 20:23:41 +02:00
Sylvain Munaut 84717d6895 gateware: Allow override of NO2BUILD_DIR from command line 
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-03 20:18:00 +02:00
Sylvain Munaut ff0ab3e383 gateware: Wrap capture/counter units and allow use of SB_MAC16 
We have a bunch of Multiply Add units that are un-used, we can
make use of the "accumulate" part to implement the few wide
counters we have to win some LCs.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-03 20:15:28 +02:00
Sylvain Munaut c75f71e319 gateware/common: Add iCE40 optimized register file for picorv32 
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-10-03 20:04:19 +02:00
Sylvain Munaut 7b228843ae gateware: Minor syntax fixes 
Theses syntax error are ignored by yosys but trying synopsys, it is more
strict, so fix them. Right thing to do anyway ...

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-09-22 20:00:13 +02:00
Sylvain Munaut bd83e53ff6 gateware/icE1usb: Initial import of production hardware gateware 
Current version has second E1 channel disabled to allow the
build to works. Works is in progress to optimize the gateware and
the fpga toolchain to allow full featured build.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
 2020-09-15 22:11:29 +02:00