platform/icebreaker: port rgb led driver from fomu

gateware/up5kspram.py → gateware/ice40.py

@@ -1,13 +1,17 @@
 from migen import *
 from litex.soc.interconnect import wishbone
+from litex.soc.interconnect.csr import AutoCSR, CSRStatus, CSRStorage
 
-# ICE40 UltraPlus family-specific Wishbone interface to the Single Port RAM
-# (SPRAM) primitives. Because SPRAM is much more coarse grained than Block
-# RAM resources, this RAM is only minimally configurable at present (64kB or
-# 128kB). Because it is single port, this module is meant to be used as the
-# CPU's RAM region, leaving block RAM free for other use.
 
-class Up5kSPRAM(Module):
+class SPRAM(Module):
+    """
+    ICE40 UltraPlus family-specific Wishbone interface to the Single Port RAM
+    (SPRAM) primitives. Because SPRAM is much more coarse grained than Block
+    RAM resources, this RAM is only minimally configurable at present (64kB or
+    128kB). Because it is single port, this module is meant to be used as the
+    CPU's RAM region, leaving block RAM free for other use.
+    """
+
     def __init__(self, width=32, size=64*1024):
 
         # Right now, LiteX only supports 32-bit CPUs. To get a 32-bit data bus,
@@ -108,3 +112,53 @@ def __init__(self, width=32, size=64*1024):
                 self.bus.ack.eq(1)
             )
         ]
+
+
+class LED(Module, AutoCSR):
+    def __init__(self, pads):
+
+        rgba_pwm = Signal(3)
+
+        self.dat = CSRStorage(8)
+        self.addr = CSRStorage(4)
+        self.ctrl = CSRStorage(4)
+
+        self.specials += Instance("SB_RGBA_DRV",
+            i_CURREN = self.ctrl.storage[1],
+            i_RGBLEDEN = self.ctrl.storage[2],
+            i_RGB0PWM = rgba_pwm[0],
+            i_RGB1PWM = rgba_pwm[1],
+            i_RGB2PWM = rgba_pwm[2],
+            o_RGB0 = pads.rgb0,
+            o_RGB1 = pads.rgb1,
+            o_RGB2 = pads.rgb2,
+            p_CURRENT_MODE = "0b1",
+            p_RGB0_CURRENT = "0b000011",
+            p_RGB1_CURRENT = "0b000001",
+            p_RGB2_CURRENT = "0b000011",
+        )
+
+        self.specials += Instance("SB_LEDDA_IP",
+            i_LEDDCS = self.dat.re,
+            i_LEDDCLK = ClockSignal(),
+            i_LEDDDAT7 = self.dat.storage[7],
+            i_LEDDDAT6 = self.dat.storage[6],
+            i_LEDDDAT5 = self.dat.storage[5],
+            i_LEDDDAT4 = self.dat.storage[4],
+            i_LEDDDAT3 = self.dat.storage[3],
+            i_LEDDDAT2 = self.dat.storage[2],
+            i_LEDDDAT1 = self.dat.storage[1],
+            i_LEDDDAT0 = self.dat.storage[0],
+            i_LEDDADDR3 = self.addr.storage[3],
+            i_LEDDADDR2 = self.addr.storage[2],
+            i_LEDDADDR1 = self.addr.storage[1],
+            i_LEDDADDR0 = self.addr.storage[0],
+            i_LEDDDEN = self.dat.re,
+            i_LEDDEXE = self.ctrl.storage[0],
+            # o_LEDDON = led_is_on, # Indicates whether LED is on or not
+            # i_LEDDRST = ResetSignal(), # This port doesn't actually exist
+            o_PWMOUT0 = rgba_pwm[0],
+            o_PWMOUT1 = rgba_pwm[1],
+            o_PWMOUT2 = rgba_pwm[2],
+            o_LEDDON = Signal(),
+        )

platforms/icebreaker.py

@@ -38,7 +38,8 @@
 _connectors = [
     ("PMOD1A", "4 2 47 45 3 48 46 44"),
     ("PMOD1B", "43 38 34 31 42 36 32 28"),
-    ("PMOD2",  "27 25 21 19 26 23 20 18")
+    ("PMOD2",  "27 25 21 19 26 23 20 18"),
+    ("RGBLED", "39 40 41"),
 ]
 
 # The attached LED/button section can be either used standalone or as a PMOD.
@@ -64,6 +65,15 @@
      ("user_ledg", 3, Pins("PMOD2:2"), IOStandard("LVCMOS33"))
 ]
 
+rgb_led = [
+    ("rgbled", 0, 
+     Subsignal("rgb0", Pins("RGBLED:0")),
+     Subsignal("rgb1", Pins("RGBLED:1")),
+     Subsignal("rgb2", Pins("RGBLED:2")),
+     IOStandard("LVCMOS33")
+    ),
+]
+
 
 class Platform(LatticePlatform):
     default_clk_name = "clk12"

targets/ice40_up5k_b_evn/base.py

@@ -10,8 +10,8 @@
 from litex.soc.integration.soc_core import *
 from litex.soc.integration.builder import *
 
-from gateware import up5kspram
 from gateware import cas
+from gateware import ice40
 from gateware import spi_flash
 
 from targets.utils import csr_map_update
@@ -105,8 +105,8 @@ def __init__(self, platform, **kwargs):
 
         # SPRAM- UP5K has single port RAM, might as well use it as SRAM to
         # free up scarce block RAM.
-        self.submodules.spram = up5kspram.Up5kSPRAM(size=128*1024)
-        self.register_mem("sram", 0x10000000, self.spram.bus, 0x20000)
+        self.submodules.spram = ice40.SPRAM(size=128*1024)
+        self.register_mem("sram", self.mem_map["sram"], self.spram.bus, 0x20000)
 
         # We don't have a DRAM, so use the remaining SPI flash for user
         # program.
@@ -121,4 +121,5 @@ def __init__(self, platform, **kwargs):
         platform.toolchain.build_template[3] = "icepack -s {build_name}.txt {build_name}.bin"
         platform.toolchain.nextpnr_build_template[2] = "icepack -s {build_name}.txt {build_name}.bin"
 
+
 SoC = BaseSoC

targets/icebreaker/base.py

@@ -9,8 +9,9 @@
 from litex.build.generic_platform import Pins, Subsignal, IOStandard
 from litex.soc.integration.soc_core import *
 from litex.soc.integration.builder import *
+from litex.soc.interconnect.csr import AutoCSR, CSRStatus, CSRStorage
 
-from gateware import up5kspram
+from gateware import ice40
 from gateware import cas
 from gateware import spi_flash
 
@@ -104,15 +105,20 @@ def __init__(self, platform, **kwargs):
         self.register_mem("spiflash", self.mem_map["spiflash"],
             self.spiflash.bus, size=platform.spiflash_total_size)
 
+        # rgb led connector
+        platform.add_extension(icebreaker.rgb_led)
+        self.submodules.rgbled = ice40.LED(platform.request("rgbled", 0))
+        self.add_csr("rgbled")
+
         bios_size = 0x8000
         self.add_constant("ROM_DISABLE", 1)
         self.add_memory_region("rom", kwargs['cpu_reset_address'], bios_size)
         self.flash_boot_address = self.mem_map["spiflash"]+platform.gateware_size+bios_size
 
         # SPRAM- UP5K has single port RAM, might as well use it as SRAM to
         # free up scarce block RAM.
-        self.submodules.spram = up5kspram.Up5kSPRAM(size=128*1024)
-        self.register_mem("sram", 0x10000000, self.spram.bus, 0x20000)
+        self.submodules.spram = ice40.SPRAM(size=128*1024)
+        self.register_mem("sram", self.mem_map["sram"], self.spram.bus, 0x20000)
 
         # We don't have a DRAM, so use the remaining SPI flash for user
         # program.

targets/upduino_v1/base.py

@@ -7,18 +7,18 @@
 from migen.genlib.resetsync import AsyncResetSynchronizer
 from migen.fhdl import verilog
 
-
 from litex.build.generic_platform import Pins, Subsignal, IOStandard
 from litex.soc.integration.soc_core import *
 from litex.soc.integration.builder import *
 
-from gateware import up5kspram
 from gateware import cas
+from gateware import ice40
 from gateware import spi_flash
 
 from targets.utils import csr_map_update
 import platforms.upduino_v1 as upduino
 
+
 class _CRG(Module):
     def __init__(self, platform):
         clk_hfosc = platform.request("sb_hfosc")
@@ -91,8 +91,8 @@ def __init__(self, platform, **kwargs):
 
         # SPRAM- UP5K has single port RAM, might as well use it as SRAM to
         # free up scarce block RAM.
-        self.submodules.spram = up5kspram.Up5kSPRAM(size=128*1024)
-        self.register_mem("sram", 0x10000000, self.spram.bus, 0x20000)
+        self.submodules.spram = ice40.SPRAM(size=128*1024)
+        self.register_mem("sram", self.mem_map["sram"], self.spram.bus, 0x20000)
 
         # We don't have a DRAM, so use the remaining SPI flash for user
         # program.
@@ -107,4 +107,5 @@ def __init__(self, platform, **kwargs):
         platform.toolchain.build_template[3] = "icepack -s {build_name}.txt {build_name}.bin"
         platform.toolchain.nextpnr_build_template[2] = "icepack -s {build_name}.txt {build_name}.bin"
 
+
 SoC = BaseSoC