From eb55b06779642d9f887a50afd21f3ff60bf0b951 Mon Sep 17 00:00:00 2001
From: Aadi Desai <21363892+supleed2@users.noreply.github.com>
Date: Fri, 9 Jun 2023 13:58:42 +0100
Subject: [PATCH] Add pulse output to `can` for frame received

---
 rtl/can.sv | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/rtl/can.sv b/rtl/can.sv
index bb0b117..190681e 100644
--- a/rtl/can.sv
+++ b/rtl/can.sv
@@ -16,6 +16,7 @@ module can
 , output var [ 7:0] o_data5
 , output var [ 7:0] o_data6
 , output var [ 7:0] o_data7
+, output var        o_pulse
 );
 
 logic rx;
@@ -111,6 +112,11 @@ always_ff @(posedge i_clk)
   if (!i_rst_n)                         data <= 64'd0;  // Reset
   else if (div_1m == 9'd1 && msg_valid) data <= b_data; // Update data if valid, at start of bit time
 
+always_ff @(posedge i_clk)
+  if (!i_rst_n)            o_pulse <= 1'b0;      // Reset
+  else if (div_1m == 9'd1) o_pulse <= msg_valid; // Output pulse if message valid, at start of bit time
+  else                     o_pulse <= 1'b0;      // Clear pulse after 1 cycle (48MHz)
+
 // Output data as individual bytes
 always_comb o_data0 = data[63:56];
 always_comb o_data1 = data[55:48];