MCU peripheral bus signals declared

diff --git a/msp_motion.vhd b/msp_motion.vhd
index b1c213ee29569c2df0fe75e651e6b5cd7e8c8f90..fb48d3d6c9f9c260d5a2e7da1116e5ad2631e974 100644 (file)
--- a/msp_motion.vhd
+++ b/msp_motion.vhd
@@ -44,14 +44,21 @@ architecture rtl of msp_motion is
   ------------------------------------------------------------------------------
   -- OpenMSP430 softcore MCU module
   ------------------------------------------------------------------------------
-  signal mclk     : std_logic;
-  signal puc      : std_logic;
+  signal mclk      : std_logic;
+  signal puc       : std_logic;
   -- External data bus
   signal dmem_addr : std_logic_vector (11 downto 0);
   signal dmem_ce   : std_logic;
   signal dmem_we   : std_logic;
   signal dmem_din  : std_logic_vector (15 downto 0);
   signal dmem_dout : std_logic_vector (15 downto 0);
+  -- Peripheral bus
+  signal per_din   : std_logic_vector (15 downto 0);
+  signal per_dout  : std_logic_Vector (15 downto 0);
+  signal per_wen   : std_logic_vector (1 downto 0);
+  signal per_wen16 : std_logic;
+  signal per_en    : std_logic;
+  signal per_addr  : std_logic_vector (7 downto 0);
 
   ------------------------------------------------------------------------------
   -- Dual-port shared memory
@@ -121,11 +128,11 @@ begin
       reset_n                  => RESET,
       rxd                      => RXD,
       txd                      => TXD,
-      per_addr                 => open,
-      per_din                  => open,
-      per_dout                 => (others => '0'),
-      per_wen                  => open,
-      per_en                   => open,
+      per_addr                 => per_addr,
+      per_din                  => per_din,
+      per_dout                 => per_dout,
+      per_wen                  => per_wen,
+      per_en                   => per_en,
       nmi                      => '0',
       irq                      => (others => '0'),
       irq_acc                  => open,
@@ -149,6 +156,11 @@ begin
   DPA_SEL <= '1' when dmem_addr (11 downto 10) = "00" else '0';
   DPA_STB <= dmem_ce and DPA_SEL;
 
+  -- Peripheral bus address decoder and data multiplexer.
+  ------------------------------------------------------------------------------
+  per_dout <= (others => '0');          -- MUST be 0 when nothing is addressed
+
+
 
   ------------------------------------------------------------------------------
   -- Dual-port shared memory