diff options
| -rw-r--r-- | src/rtl/trng_csprng.v | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/src/rtl/trng_csprng.v b/src/rtl/trng_csprng.v index 4d472d2..1bdc737 100644 --- a/src/rtl/trng_csprng.v +++ b/src/rtl/trng_csprng.v @@ -42,18 +42,18 @@ module trng_csprng( input wire reset_n, // Control, config and status. + input wire enable, input debug_mode, input wire [4 : 0] num_rounds, input wire [63 : 0] num_blocks, input wire seed, - input wire enable, output wire more_seed, output wire ready, output wire error, // Seed input - input wire seed_syn, input [511 : 0] seed_data, + input wire seed_syn, output wire seed_ack, // Random data output @@ -71,12 +71,13 @@ module trng_csprng( parameter CTRL_IDLE = 4'h0; parameter CTRL_SEED0 = 4'h1; - parameter CTRL_SEED1 = 4'h2; - parameter CTRL_INIT0 = 4'h3; - parameter CTRL_INIT1 = 4'h4; - parameter CTRL_NEXT0 = 4'h5; - parameter CTRL_NEXT1 = 4'h6; - parameter CTRL_MORE = 4'h7; + parameter CTRL_NSYN = 4'h2; + parameter CTRL_SEED1 = 4'h3; + parameter CTRL_INIT0 = 4'h4; + parameter CTRL_INIT1 = 4'h5; + parameter CTRL_NEXT0 = 4'h6; + parameter CTRL_NEXT1 = 4'h7; + parameter CTRL_MORE = 4'h8; parameter CTRL_CANCEL = 4'hf; @@ -133,6 +134,7 @@ module trng_csprng( wire [511 : 0] cipher_data_out; wire cipher_data_out_valid; + wire cipher_ready; reg discard_outputs; @@ -354,10 +356,24 @@ module trng_csprng( end else if (seed_syn) begin - more_seed_new = 1; seed_ack_new = 1; cipher_block_new = seed_data; cipher_block_we = 1; + csprng_ctrl_new = CTRL_NSYN; + csprng_ctrl_we = 1; + end + end + + CTRL_NSYN: + begin + if ((!enable) || (seed)) + begin + csprng_ctrl_new = CTRL_CANCEL; + csprng_ctrl_we = 1; + end + else + begin + more_seed_new = 1; csprng_ctrl_new = CTRL_SEED1; csprng_ctrl_we = 1; end |