定期コミット VGAシステムのデバッグ。

[oca1/test.git] / VGADisplay / src / vram_ctrl.nsl

diff --git a/VGADisplay/src/vram_ctrl.nsl b/VGADisplay/src/vram_ctrl.nsl
index c4d9335..48dc7a2 100644 (file)
--- a/VGADisplay/src/vram_ctrl.nsl
+++ b/VGADisplay/src/vram_ctrl.nsl
@@ -1,26 +1,50 @@
-#include "vram.nsh"
+/**
+*      VRAM Control Module
+*      Module name is "vram_ctrl"
+*      @author zyanham
+*      @version 1.0
+*      Comment : Reading Steiner
+*/
 
-declare vram_ctrl interface {
-       input   m_clock ;
-       input   p_reset ;
+#include "vram.nsh"
 
-       input   wrdata_i[8] ;
-       input   rdaddress_i[14] ;
-       input   wraddress_i[14] ;
-       output  rddata_o[8] ;
+declare vram_ctrl {
 
-       func_in read_req( rdaddress_i ) ;
-       func_out read_ack( rddata_o ) ;
+       input    i_Wdata[8] ;   // in Write Data
+       input    i_Wadrs[14] ;  // in Write Address
+       input    i_Radrs[14] ;  // in Read Address
+       output   o_Rdata[8] ;   // out Read Data
 
+       func_in  fi_Wr_req( i_Wadrs, i_Wdata ) ;
+       func_in  fi_Rd_req( i_Radrs ) ;
+       func_out fo_Rd_ack( o_Rdata ) ;
 }
 module vram_ctrl{
-       vram U_VRAM ;
+       vram u_VRAM ;
+       
+       reg r_Radrs_hld[14] = 0 ;
+
+       {
+               u_VRAM.clock = m_clock ;
+       
+               /* Memory Terminal Assign */
+
+               if(~fi_Wr_req) {
+                       u_VRAM.wren     = 0 ;
+               }
+       }
+       
+       func fi_Wr_req {
+               u_VRAM.wren              = 1 ;
+               u_VRAM.data              = i_Wdata ;
+               u_VRAM.wraddress = i_Wadrs ;
+       }
        
-       /* Assign */
-       U_VRAM.clock     = m_clock ;
-       U_VRAM.data              = wrdata_i ;
-       U_VRAM.rdaddress = rdaddress_i ;
-       U_VRAM.wraddress = wraddress_i ;
-//     U_VRAM.wren              = wren_i ;
-       rddata_o                 = U_VRAM.q ;
+       func fi_Rd_req seq {
+                       u_VRAM.rdaddress = i_Radrs ;
+               {
+                       u_VRAM.rdaddress = r_Radrs_hld ;
+                       fo_Rd_ack( u_VRAM.q ) ;
+               }
+       }
 }
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