[Cryptech-Commits] [user/js/fpga_mkm] branch master updated: (1) Changing key memory to be based on bytes. (2) Adding API commands ands status values for operating the memory.

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joachim at secworks.se pushed a commit to branch master
in repository user/js/fpga_mkm.

The following commit(s) were added to refs/heads/master by this push:
     new 485b5c0  (1) Changing key memory to be based on bytes. (2) Adding API commands ands status values for operating the memory.
485b5c0 is described below

commit 485b5c0316062d5ce7334ed224cc9df242123a32
Author: Joachim Strömbergson <joachim at assured.se>
AuthorDate: Tue Mar 26 16:54:03 2019 +0100

    (1) Changing key memory to be based on bytes. (2) Adding API commands ands status values for operating the memory.
---
 src/rtl/fpga_mkm.v | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/rtl/fpga_mkm.v b/src/rtl/fpga_mkm.v
index e0dc14a..89825ed 100644
--- a/src/rtl/fpga_mkm.v
+++ b/src/rtl/fpga_mkm.v
@@ -68,13 +68,21 @@ module fpga_mkm(
   localparam CTRL_DONE  = 3;
 
 
-  localparam MEM_WORDS = 16;
+  localparam MEM_BYTES = 32;
+
+  localparam CMD_WRITE_BYTES = 8'h37;
+  localparam CMD_READ_BYTES  = 8'h93;
+  localparam CMD_GET_STATUS  = 8'hca;
+
+  localparam STAT_KEY_NOT_LOADED  = 8'hdb;
+  localparam STAT_KEY_LOADED      = 8'hbd;
+  localparam STAT_TAMPER_DETECTED = 8'ha5;
 
 
   //----------------------------------------------------------------
   // Registers including update variables and write enable.
   //----------------------------------------------------------------
-  reg [31 : 0] key_mem [0 : (MEM_WORDS - 1)];
+  reg [7 : 0] key_mem [0 : (MEM_BYTES - 1)];
 
   reg [21 : 0] alarm_counter_reg = 22'h0;
 

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