diff options
Diffstat (limited to 'control_lib/simple_uart.v')
-rw-r--r-- | control_lib/simple_uart.v | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/control_lib/simple_uart.v b/control_lib/simple_uart.v deleted file mode 100644 index 22f0e70a2..000000000 --- a/control_lib/simple_uart.v +++ /dev/null @@ -1,61 +0,0 @@ - -module simple_uart - #(parameter TXDEPTH = 1, - parameter RXDEPTH = 1) - (input clk_i, input rst_i, - input we_i, input stb_i, input cyc_i, output reg ack_o, - input [2:0] adr_i, input [31:0] dat_i, output reg [31:0] dat_o, - output rx_int_o, output tx_int_o, output tx_o, input rx_i, output baud_o); - - // Register Map - localparam SUART_CLKDIV = 0; - localparam SUART_TXLEVEL = 1; - localparam SUART_RXLEVEL = 2; - localparam SUART_TXCHAR = 3; - localparam SUART_RXCHAR = 4; - - wire wb_acc = cyc_i & stb_i; // WISHBONE access - wire wb_wr = wb_acc & we_i; // WISHBONE write access - - reg [15:0] clkdiv; - wire [7:0] rx_char; - wire tx_fifo_full, rx_fifo_empty; - wire [7:0] tx_fifo_level, rx_fifo_level; - - always @(posedge clk_i) - if (rst_i) - ack_o <= 1'b0; - else - ack_o <= wb_acc & ~ack_o; - - always @(posedge clk_i) - if (rst_i) - clkdiv <= 0; - else if (wb_wr) - case(adr_i) - SUART_CLKDIV : clkdiv <= dat_i[15:0]; - endcase // case(adr_i) - - always @(posedge clk_i) - case (adr_i) - SUART_TXLEVEL : dat_o <= tx_fifo_level; - SUART_RXLEVEL : dat_o <= rx_fifo_level; - SUART_RXCHAR : dat_o <= rx_char; - endcase // case(adr_i) - - simple_uart_tx #(.DEPTH(TXDEPTH)) simple_uart_tx - (.clk(clk_i),.rst(rst_i), - .fifo_in(dat_i[7:0]),.fifo_write(ack_o && wb_wr && (adr_i == SUART_TXCHAR)), - .fifo_level(tx_fifo_level),.fifo_full(tx_fifo_full), - .clkdiv(clkdiv),.baudclk(baud_o),.tx(tx_o)); - - simple_uart_rx #(.DEPTH(RXDEPTH)) simple_uart_rx - (.clk(clk_i),.rst(rst_i), - .fifo_out(rx_char),.fifo_read(ack_o && ~wb_wr && (adr_i == SUART_RXCHAR)), - .fifo_level(rx_fifo_level),.fifo_empty(rx_fifo_empty), - .clkdiv(clkdiv),.rx(rx_i)); - - assign tx_int_o = ~tx_fifo_full; - assign rx_int_o = ~rx_fifo_empty; - -endmodule // simple_uart |