add SS

1 files changed, 4 insertions, 1 deletions

diff --git a/spi_master.v b/spi_master.v
index 053686f..d8b9020 100644
--- a/spi_master.v
+++ b/spi_master.v
@@ -18,7 +18,9 @@ spi_master
 #(
 	parameter WID = 24, // Width of bits per transaction.
 	parameter WID_LEN = 5, // Length in bits required to store WID
-	parameter CYCLE_HALF_WAIT = 1, // Half of the wait time of a cycle
+	parameter CYCLE_HALF_WAIT = 1, // One less than half of the wait time of a cycle.
+	                               // One cycle of a transfer is 2(CYCLE_HALF_WAIT + 1)
+	                               // clock cycles.
 	parameter TIMER_LEN = 3, // Length in bits required to store CYCLE_HALF_WAIT
 	parameter POLARITY = 0, // 0 = sck idle low, 1 = sck idle high
 	parameter PHASE = 0 // 0 = rising-read falling-write, 1 = rising-write falling-read.
@@ -134,6 +136,7 @@ always @ (posedge clk) begin
 				bit_counter <= bit_counter + 1;
 			end
 		end
+
 		state <= CYCLE_WAIT;
 	end
 	CYCLE_WAIT: begin