quartus chengxu_quartus19_4321_按键防抖_

0: if( isH2L ) i <= i + 1'b1;// H2L check 16. 1: if( C1 == T10MS -1 ) begin C1 <= 19'd0; i <= i + 1'b1; end// H2L debounce 17. else C1 <= C1 + 1'b1; 18. 2: begin isPress <= 1'b1; i <= i + 1'b1; end // Key trigger prees up 19. 3: begin isPress <= 1'b0; i <= i + 1'b1; end// Key trigger prees down 20. 4: if( isL2H ) i <= i + 1'b1;// L2H check 21. 5: if( C1 == T10MS -1 ) begin C1 <= 19'd0; i <= i + 1'b1; end 22. else C1 <= C1 + 1'b1;// L2H debounce 23. 6: begin isRelease <= 1'b1; i <= i + 1'b1; end// Key trigger prees up 24. 7: begin isRelease <= 1'b0; i <= 4'd0; end// Key trigger prees down