FreeCalypso > hg > fc-pcm-if
view fpga/mcsi-rx/clk_check.v @ 9:62579cfff4fc
fc-mcsi-rxtx: more proper integration with ttyhacks
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 28 Oct 2024 06:02:04 +0000 |
parents | b3190839cce3 |
children |
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/* * The logic implemented in this module detects if MCSI_CLK is running or not, * for the purpose of visual indication on a LED. In the future Tx-capable * FPGA, this logic will also be used to reset the Tx buffer when the clock * stops. */ module clk_check (IntClk, MCSI_CLK_sync, MCSI_CLK_running); input IntClk; input MCSI_CLK_sync; output MCSI_CLK_running; reg [15:0] shift_reg; always @(posedge IntClk) shift_reg <= {shift_reg[14:0],MCSI_CLK_sync}; assign MCSI_CLK_running = (shift_reg != 16'h0000) && (shift_reg != 16'hFFFF); endmodule