uart rx solutionsolutions

1 files changed, 9 insertions, 0 deletions

diff --git a/src/uart_rx_bitcnt.vhd b/src/uart_rx_bitcnt.vhd
index 7aec27a..78e8a1c 100644
--- a/src/uart_rx_bitcnt.vhd
+++ b/src/uart_rx_bitcnt.vhd
@@ -15,6 +15,15 @@ entity uart_rx_bitcnt is
 end entity;
 
 architecture rtl of uart_rx_bitcnt is
+  signal cnt, ncnt : unsigned(3 downto 0);
 begin
+  cnt <= "0000" when rst_n = '0' else ncnt when rising_edge(clk);
+  ncnt <= "0001" when edge_i = '1' and cnt = 0 else
+    cnt + 1 when en_f_i = '1' and cnt > 0 and cnt < 10 else
+    "0000" when en_h_i = '1' and cnt = 10 else cnt;
+
+  rx_shift_o <= '1' when cnt >= 2 and cnt <= 9 and en_h_i = '1' else '0';
+  dv_o <= '1' when cnt = 9 and en_f_i = '1' else '0';
+  rx_baudcnt_res_o <= '1' when cnt = 0 else '0';
 end architecture rtl;