Merge pull request #749 from paulhamsh/master

Add support for seven segment display in Nexys4DDR

Author: enjoy-digital

litex_boards/targets/digilent_nexys4ddr.py

@@ -17,6 +17,7 @@
 from litex.soc.integration.builder import *
 from litex.soc.cores.video import VideoVGAPHY
 from litex.soc.cores.led import LedChaser
+from litex.soc.cores.seven_seg import SevenSegmentDisplay
 
 from litedram.modules import MT47H64M16
 from litedram.phy import s7ddrphy
@@ -54,6 +55,7 @@ def __init__(self, platform, sys_clk_freq):
 class BaseSoC(SoCCore):
     def __init__(self, sys_clk_freq=75e6,
         with_spi_flash         = False,
+        with_seven_seg         = False,
         with_ethernet          = False,
         with_etherbone         = False,
         eth_ip                 = "192.168.1.50",
@@ -82,7 +84,16 @@ def __init__(self, sys_clk_freq=75e6,
                 module        = MT47H64M16(sys_clk_freq, "1:2"),
                 l2_cache_size = kwargs.get("l2_size", 8192)
             )
-            
+
+        # 7-Segment Display ------------------------------------------------------------------------
+        if with_seven_seg:
+            self.seven_seg = SevenSegmentDisplay(
+                sys_clk_freq  = sys_clk_freq,
+                segments_pads = platform.request("seven_seg"),
+                anodes_pads   = platform.request("seven_seg_ctrl_n"),
+            )
+            self.csr.add("seven_seg")
+
         # SPI Flash --------------------------------------------------------------------------------
         if with_spi_flash:
             from litespi.modules import S25FL128S
@@ -122,7 +133,8 @@ def main():
     ethopts = parser.target_group.add_mutually_exclusive_group()
     ethopts.add_argument("--with-ethernet",  action="store_true", help="Enable Ethernet support.")
     ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support.")
-    parser.add_target_argument("--with-spi-flash", action="store_true",       help="Enable memory-mapped SPI flash.")
+    parser.add_target_argument("--with-spi-flash", action="store_true",     help="Enable memory-mapped SPI flash.")
+    parser.add_target_argument("--with-seven-seg", action="store_true",     help="Enable 7-segment display support.")
     parser.add_target_argument("--eth-ip",         default="192.168.1.50",  help="Ethernet/Etherbone IP address.")
     parser.add_target_argument("--eth-dynamic-ip", action="store_true",     help="Enable dynamic Ethernet IP assignment.")
     parser.add_target_argument("--remote-ip",      default="192.168.1.100", help="Remote IP address of TFTP server.")
@@ -139,6 +151,7 @@ def main():
         with_ethernet          = args.with_ethernet,
         with_etherbone         = args.with_etherbone,
         with_spi_flash         = args.with_spi_flash,
+        with_seven_seg         = args.with_seven_seg,
         eth_ip                 = args.eth_ip,
         eth_dynamic_ip         = args.eth_dynamic_ip,
         remote_ip              = args.remote_ip,