gitignore: ignore __pycache__

.gitignore

@@ -1,2 +1,3 @@
 /work/
 *.o
+__pycache__

firmware/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "firmware"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

firmware/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

vhdl/arty_a7.vhdl

@@ -36,7 +36,7 @@ entity arty_a7 is
 		-- when necessary
 		pmod_a : out std_logic_vector(7 downto 0);
 		pmod_b : out std_logic_vector(7 downto 0);
-		pmod_c : in std_logic_vector(7 downto 0);
+		pmod_c : out std_logic_vector(7 downto 0);
 		pmod_d : out std_logic_vector(7 downto 0);
 
 		clock_100mhz : in std_logic;
@@ -320,9 +320,20 @@ begin
 
 	sys_reset <= not pll_locked or not n_reset;
 
-	pmod_a <= drivers(7 downto 0);
-	pmod_b <= drivers(15 downto 8);
-	pmod_d <= drivers(23 downto 16);
+	pmod_a <= "00" & drivers(5 downto 0);
+	pmod_b <= "00" & drivers(11 downto 6);
+
+	pmod_c(7) <= '0';
+	pmod_c(6) <= '0';
+	pmod_c(5) <= drivers(17);
+	pmod_c(4) <= drivers(16);
+	pmod_c(3) <= drivers(15);
+	pmod_c(2) <= drivers(14);
+	-- workaround for https://github.com/gatecat/nextpnr-xilinx/issues/42#issuecomment-1183525828
+	pmod_c(1) <= drivers(12);
+	pmod_c(0) <= drivers(13);
+
+	pmod_d <= "00" & drivers(23 downto 18);
 
 	sender: process(sys_clk)
 	begin