wb_uart: fixed broken VUART functionality with FIFOs enabled

568f79d4 · Tomasz Wlostowski · 3d2d1220 · 568f79d4
Commit 568f79d4 authored Mar 10, 2023 by Tomasz Wlostowski
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wb_simple_uart.vhd modules/wishbone/wb_uart/wb_simple_uart.vhd +2 -3

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--- a/modules/wishbone/wb_uart/wb_simple_uart.vhd
+++ b/modules/wishbone/wb_uart/wb_simple_uart.vhd
@@ -240,9 +240,8 @@ begin  -- arch

  gen_phys_fifos : if g_WITH_PHYSICAL_UART_FIFO generate

-    rx_fifo_wr <= not rx_fifo_full and phys_rx_ready;
-    tx_fifo_wr <= not tx_fifo_full and ( regs_out.tdr_tx_data_wr_o or
-                  ( f_to_sl(g_WITH_VIRTUAL_UART) and regs_out.host_tdr_data_wr_o ) );
+    rx_fifo_wr <= not rx_fifo_full and (phys_rx_ready or ( f_to_sl(g_WITH_VIRTUAL_UART) and regs_out.host_tdr_data_wr_o ) );
+    tx_fifo_wr <= not tx_fifo_full and regs_out.tdr_tx_data_wr_o;

    tx_fifo_reset_n <= rst_n_i and not regs_out.cr_tx_fifo_purge_o;
    rx_fifo_reset_n <= rst_n_i and not regs_out.cr_rx_fifo_purge_o;