VME_IRQ_Controller: formatting.

306da800 · Tristan Gingold · 03b1ca39 · 306da800
Commit 306da800 authored Sep 12, 2017 by Tristan Gingold
Hide whitespace changes
Inline Side-by-side

Showing with 17 additions and 15 deletions

VME_IRQ_Controller.vhd hdl/vme64x-core/rtl/VME_IRQ_Controller.vhd +17 -15

No files found.
--- a/hdl/vme64x-core/rtl/VME_IRQ_Controller.vhd
+++ b/hdl/vme64x-core/rtl/VME_IRQ_Controller.vhd
@@ -68,27 +68,27 @@
 --
 --  Time constraint n° 35:
 --
-- Clk         _____       _____       _____       _____       _____       _____
--       _____|     |_____|     |_____|     |_____|     |_____|     |_____|     |_____
+-- Clk         ____      ____      ____      ____      ____      ____
+--       _____|    |____|    |____|    |____|    |____|    |____|    |_____
 --
-- VME_AS1_n_i    ____________________________________________________________________
--       ________|
+-- VME_AS1_n_i   __________________________________________________________
+--       _______|
 --
-- VME_AS_n_i                                      ___________________________________
--       _________________________________________|
+-- VME_AS_n_i                                ______________________________
+--       ___________________________________|
 --
-- s_AS_RisingEdge                                             ___________
--       _____________________________________________________|           |___________
+-- s_AS_RisingEge                                      _________
+--       _____________________________________________|         |__________
 --
-- s_IACKOUT      ____________________________________________________________________
--       ________|
+-- s_IACKOUT     __________________________________________________________
+--       _______|
 --
-- VME_IACKOUT_o  ____________________________________________________________________
--       ________|
+-- VME_IACKOUT_  __________________________________________________________
+--       _______|
 --
--       _________________________________________________________________  __________
--                                             IACKOUT 1/2                \/ IDLE/IRQ
--       _________________________________________________________________/\__________
+--       _______________________________________________________  _________
+--                                       IACKOUT 1/2            \/ IDLE/IRQ
+--       _______________________________________________________/\_________
 --
 --  To respect the time constraint indicated with the number 35 fig. 55 pag. 183
 --  in the "VMEbus Specification" ANSI/IEEE STD1014-1987, is necessary to
@@ -254,6 +254,8 @@ begin

            if INT_Req_i = '1' and retry_mask = '1' then
              if VME_IACKIN_n_i /= '0' then
+                -- FIXME: what if INT_Level_i is 0 (irq won't be visible and
+                -- thus never acked) ?
                state       <= IRQ;
                VME_IRQ_n_o <= f_select_irq_line(INT_Level_i);
              else