From ddeccf3a347f0a578542c2044e53c496867a9b20 Mon Sep 17 00:00:00 2001 From: Jens Ahrensfeld Date: Sun, 18 Oct 2009 18:46:06 +0000 Subject: [PATCH] - added force TX-interrupt register bit (0x200) Committed on the Free edition of March Hare Software CVSNT Server. Upgrade to CVS Suite for more features and support: http://march-hare.com/cvsnt/ git-svn-id: http://moon:8086/svn/vhdl/trunk@530 cc03376c-175c-47c8-b038-4cd826a8556b --- lib/uart/uart_wb.vhd | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/lib/uart/uart_wb.vhd b/lib/uart/uart_wb.vhd index 0c767c6..f13bb4f 100644 --- a/lib/uart/uart_wb.vhd +++ b/lib/uart/uart_wb.vhd @@ -78,6 +78,7 @@ ARCHITECTURE behavior OF uart_wb IS signal tx_complete : std_logic; signal tx_empty : std_logic; signal tx_busy : std_logic; + signal force_irq_tx : std_logic; begin @@ -90,6 +91,7 @@ registers_write: if rising_edge(CLK_I) then reg_we_uart_tx <= '0'; irq_tx_ack <= '0'; + force_irq_tx <= '0'; if RST_I = '1' then reg_uart_baud <= to_unsigned(53, 16); rx_int_en <= '0'; @@ -105,6 +107,7 @@ registers_write: rx_int_en <= DAT_I(6); tx_int_en <= DAT_I(5); irq_tx_ack <= DAT_I(8); + force_irq_tx <= DAT_I(9); when "0010" => reg_uart_baud <= DAT_I(15 downto 0); @@ -168,7 +171,9 @@ tx_interrupt: elsif irq_tx_ack = '1' then irq_tx <= '0'; else - if tx_empty = '0' then + if force_irq_tx = '1' then + irq_tx <= tx_int_en; + elsif tx_empty = '0' then tx_busy <= '1'; elsif tx_busy = '1' then irq_tx <= tx_int_en;