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Diffstat (limited to 'source/link_timer.v')
| -rw-r--r-- | source/link_timer.v | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/source/link_timer.v b/source/link_timer.v deleted file mode 100644 index 7b501ff..0000000 --- a/source/link_timer.v +++ /dev/null @@ -1,67 +0,0 @@ -/* - * link_timer.v - * - * Copyright 2020 Mind Chasers Inc. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - * function: Generate link timer pulse (1.6 and 10 ms) per SGMII and IEEE 802.3 - * - */ - -module link_timer( - input rstn, - input clk, // 125 MHz data clock - output pulse_1_6ms, - output pulse_10ms -); - - reg [13:0] cnt; // 0.1 ms counter - reg [3:0] cnt_1_6ms; - reg [6:0] cnt_10ms; - - // 0.1 ms counter - always @ (posedge clk or negedge rstn) - if ( !rstn ) - cnt <= 'd0; - else if (cnt == 'd12500) - cnt <= 'd0; - else - cnt <= cnt + 1; - - // 1.6 ms counter - always @ (posedge clk or negedge rstn) - if ( !rstn ) - cnt_1_6ms <= 'd0; - else if (cnt == 'd12500) - if (cnt_1_6ms == 'd16) - cnt_1_6ms <= 'd0; - else - cnt_1_6ms <= cnt_1_6ms + 1; - - assign pulse_1_6ms = (cnt == 'd12500 && cnt_1_6ms == 'd15); - - // 10 ms counter - always @ (posedge clk or negedge rstn) - if ( !rstn ) - cnt_10ms <= 'd0; - else if (cnt == 'd12500) - if (cnt_10ms == 'd99) - cnt_10ms <= 'd0; - else - cnt_10ms <= cnt_10ms + 1; - - assign pulse_10ms = (cnt == 'd12500 && cnt_10ms == 'd99); - - -endmodule
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