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Docs: example_synth fifo update

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More detail on `memory_libmap`, the `$__ICE40_RAM4K_` intermediate step, and the
bizarre opt output.
This commit is contained in:
Krystine Sherwin
2024-01-30 13:34:29 +13:00
parent fd0c574942
commit fae35fe98b
4 changed files with 106 additions and 14 deletions
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docs/source/code_examples/fifo/fifo_map.ys
+4 -1
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@@ -7,11 +7,14 @@ synth_ice40 -top fifo -run begin:map_ram
# ========================================================
echo on
tee -o fifo.libmap debug memory_libmap -lib +/ice40/brams.txt -lib +/ice40/spram.txt -no-auto-huge
echo off
synth_ice40 -top fifo -run map_ram:map_ffram
select -set mem t:SB_RAM40_4K
select -set remap @mem %ci:+SB_RAM40_4K[RADDR] @mem %co %%
select -set rdata_path t:SB_RAM40_4K %ci*:-SB_RAM40_4K[WCLKE,WDATA,WADDR,WE] t:SB_RAM40_4K %co* %%
show -color maroon3 @mem -color cornflowerblue @remap -notitle -format dot -prefix rdata_map_ram @rdata_path
show -color cornflowerblue @remap -notitle -format dot -prefix rdata_map_ram @rdata_path
# ========================================================