Makefile: Correct parameters for the Orange Crab 85F

The Orange Crab v2.1 with 85k LUT FPGA uses a LFE5U-85F device, not an LFE5UM5G device. Specifying the wrong device causes the FPGA to give a configuration error and not load the bitstream. Also add flags to indicate that the device is the highest speed grade (the -8 grade) and that the bitstream should be compressed, and can be loaded at 38.8MHz. Signed-off-by: Paul Mackerras <[email protected]>
antonblanchard · Oct 2, 2021 · 63b9103 · 63b9103
1 parent 9cbe1f4
commit 63b9103
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/Makefile b/Makefile
@@ -161,9 +161,9 @@ CLK_INPUT=48000000
 CLK_FREQUENCY=48000000
 LPF=constraints/orange-crab.lpf
 PACKAGE=CSFBGA285
-NEXTPNR_FLAGS=--um5g-85k --freq 48
+NEXTPNR_FLAGS=--85k --speed 8 --freq 48
 OPENOCD_JTAG_CONFIG=openocd/olimex-arm-usb-tiny-h.cfg
-OPENOCD_DEVICE_CONFIG=openocd/LFE5UM5G-85F.cfg
+OPENOCD_DEVICE_CONFIG=openocd/LFE5UM-85F.cfg
 endif
 
 # ECP5-EVN
@@ -213,7 +213,7 @@ microwatt_out.config: microwatt.json $(LPF)
 	mv -f $@.tmp $@
 
 microwatt.bit: microwatt_out.config
-	$(ECPPACK) --svf microwatt.svf $< $@
+	$(ECPPACK) --compress --freq 38.8 --svf microwatt.svf $< $@
 
 microwatt.svf: microwatt.bit