For these primitives, Gowin decided to use a different option for
describing ports—directly in the module header, i.e.
``` verilog
module ADC(input CLK);
```
instead of
``` verilog
module ADC(CLK);
input CLK;
```
Since this one-time parser becomes too confusing, it is easier to simply
add ADC descriptions as they are from a separate file, especially since
these primitives are only available in the GW5A series.
Test:
``` shell
yosys -p "read_verilog top.v; synth_gowin -json top-synth.json -family gw5a"
```
The old version of Yosys simply won't compile the design due to the lack
of port descriptions, while the new version will compile without errors.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
The dynamic clock selection (DCS) primitive has undergone changes with
the release of the GW5A series—the CLK0,1,2,3 inputs are now
CLKIN0,1,2,3, but only for GW5A series chips.
There are no functional changes, only renaming.
Here we are transferring the description of the DCS primitive from
general to specialized files for each chip series.
We have also fixed a bug in the generation script that caused the loss
of primitive parameters. Fortunately, this only affected the
analog-to-digital converter, which has not yet been implemented.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
If let's say the enumeration of inputs took several lines, then all
after the first one were ignored. Since the first line ended with a
comma, an error was generated when trying to use the resulting file.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
Primitives that are not planned for implementation for reasons of
belonging to old unsupported chips or representing composite complex IPs
rather than primitives are removed.
Also latches and large MUXes not planned for implementation.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
EMCU is a micro-processor based on ARM Cortex-M3 embedded in the
GW1NSR-4C chip used in the Tangnano4k board.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
We add a BANDGAP primitive used to turn off power to OSC, PLL and other
things on some GOWIN chips.
We also mark this primitive and GSR as keep.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
