- `timescale 1ns / 1ps
- //////////////////////////////////////////////////////////////////////////////////
- // Company:
- // Engineer:
- //
- // Create Date: 13:38:11 11/09/2017
- // Design Name:
- // Module Name: auto_lock
- // Project Name:
- // Target Devices:
- // Tool versions:
- // Description:
- //
- // Dependencies:
- //
- // Revision:
- // Revision 0.01 - File Created
- // Additional Comments:
- //
- //////////////////////////////////////////////////////////////////////////////////
- module auto_lock(
- input clk, //系统时钟
- input rst_n, //系统复位
- input lock_signal, //失锁锁定输入
-
- output reg analog_switch_1, //模拟开关1输出
- output reg analog_switch_2, //模拟开关2输出
- output reg [13:0] dac_ch1, //温度dac
-
- // input sawtooth_frequence, //锯齿波频率
- output reg sawtooth_control, //锯齿波控制
-
- input signed [15:0]adc_ch1_data, //adc ch1电压值
- //按键输入
- input key1_in,
- input key2_in,
- input key3_in,
- input key4_in,
- //系统状态指示
- output lock_status_led, //led
-
- //DEBUG数据
- output [23:0]debug_state_value,
- output [23:0]debug_pdh_ok_count_value
- );
-
- parameter ON = 1'b1,OFF = 1'b0;
- parameter LOCK = 1'b1,UNLOCK = 1'b0;
- parameter START = 1'b1,END = 1'b0;
-
- // parameter T100MS = 32'd49_999_99;
- // parameter T1S = 32'd49_999_999;
- parameter T100MS = 32'd49;
- parameter T1S = 32'd49_9;
- parameter T2S = 8'd2;
- parameter T5S = 8'd5;
- parameter T10S = 8'd10;
- parameter T20S = 8'd20;
-
- //temperture search zero point
- //parameter EXPERIENCE = 14'd8540; //经验值
-
- assign debug_state_value = auto_lock_state;
- assign debug_pdh_ok_count_value = pdh_ok_count;
- /**********************按键模块*************************/
- keys keys_model(
-
- .clk (clk), //系统时钟
- .rst_n (rst_n), //系统复位
- //按键输入
- .key1_in (key1_in),
- .key2_in (key2_in),
- .key3_in (key3_in),
- .key4_in (key4_in),
-
- //按键输出
- .key1_scan (key1_scan),
- .key2_scan (key2_scan),
- .key3_scan (key3_scan),
- .key4_scan (key4_scan)
- );
- /***********************锁定信号触发边沿检测*************************/
- lock_signal_edge_check lock_signal_edge_check_model(
- .clk (clk), //系统时钟
- .rst_n (rst_n), //系统复位
-
- .lock_signal(lock_signal),
- .locked (locked),
- .pdh_ok (pdh_ok),
- .lock_status_led (lock_status_led)
- );
-
- /***********************系统运行*************************/
- reg[7:0] pdh_ok_count;
- parameter pdh_ok_count_N_INIT = 8'd3;
- reg[7:0] pdh_ok_count_N;
- reg[31:0] pdh_time_count;
- parameter pdh_time_INIT = 32'd999_999;
- reg[31:0] pdh_time; //在锯齿波为1Hz延时为20ms 频率越高锁定时间越短
- reg pdh_ok_delay_flag; //pdh延时标志
-
- reg [7:0]locked_fail_count; //锁定失败计数
-
- reg [13:0]dac_to_temperature_i;
- reg [13:0]dac_to_temperature_spare;//备份值
-
-
- parameter init_N = 14'd8; // N 的初始范围
- reg [13:0]N;
- parameter init_K = 14'd2; //K 的初始值
- reg [13:0]K;
-
- parameter init_DIR = 4'd1; //扫描方向初始为正
- reg [3:0]DIR; //扫描方向
-
-
-
- reg [31:0]time_count;
- reg [7:0]time_ones;
-
- reg [7:0]auto_lock_state;
- reg [7:0]system_run_task_state;
-
- reg key1buf,key2buf,key3buf,key4buf;
-
- always@(posedge clk)
- begin
-
- if(!rst_n) //低电平复位
- begin
- auto_lock_state<= 8'd0;
-
- end
- else
- begin
-
- case (auto_lock_state)
-
- 8'd0: //初始化
- begin
-
- dac_to_temperature_spare <= 14'd8192; //0V
- dac_to_temperature_i <= 14'd8192; //0V
- dac_ch1 <= dac_to_temperature_i;
-
- analog_switch_1 <= OFF;
- analog_switch_2 <= OFF;
- sawtooth_control <= OFF;
-
- time_count <= 0;
- time_ones <= 0;
-
- key1buf <= 2'd0;
- key2buf <= 2'd0;
-
- auto_lock_state <= 8'd1;
- end
-
- 8'd1: //运行
- begin
-
- dac_ch1 <= dac_to_temperature_i;
-
- //系统预热20s
- if(time_count == T1S) //1s
- begin
- time_ones <= time_ones + 1'b1;
-
- if(time_ones == T20S) //20s
- begin
- //进入正常运行模式
- dac_to_temperature_spare <= dac_to_temperature_i;
- time_ones <= 0;
- time_count <= 0;
- system_run_task_state <= 8'd0;
- auto_lock_state <= 8'd3;
- end
- else
- time_count <= 0;
- end
- else
- begin
- time_count <= time_count + 1'b1;
-
- //按键按下进行快速搜索
- key3buf <= key3_scan;
- if({key3buf,key3_scan} == 2'b10)
- begin
- time_ones <= 0;
- time_count <= 0;
- auto_lock_state <= 8'd2;
- end
- end
-
- end
-
- 8'd2: //快速搜索
- begin
-
- fast_search_task();
- end
-
- 8'd3:
- begin //模块运行
-
- system_run_task();
-
- end
-
- default:
- auto_lock_state <= 8'd0;
-
- endcase
- end
- end
-
-
-
- //快速搜索模块的任务
- task fast_search_task();
-
- begin
-
- key1buf <= key1_scan;
- if({key1buf,key1_scan} == 2'b10 && dac_to_temperature_i < 14'd16373) //下降沿
- begin
- dac_to_temperature_i <= dac_to_temperature_i + 10;
- dac_ch1 <= dac_to_temperature_i;
- end
- key2buf <= key2_scan;
- if({key2buf,key2_scan} == 2'b10 && dac_to_temperature_i > 14'd10) //下降沿
- begin
- dac_to_temperature_i <= dac_to_temperature_i - 10;
- dac_ch1 <= dac_to_temperature_i;
- end
-
- //模块运行
- key4buf <= key4_scan;
- if({key4buf,key4_scan} == 2'b10)
- begin
- dac_to_temperature_spare <= dac_to_temperature_i;
- system_run_task_state <= 8'd0;
- auto_lock_state <= 8'd3;
- end
-
- end
-
- endtask
- //系统运行任务
- task system_run_task();
- begin
- case(system_run_task_state)
-
- 8'd0: //初始化
- begin
- time_count <= 0;
- time_ones <= 0;
-
- pdh_ok_count <= 8'd0;
- pdh_ok_count_N <= 8'd3;
-
- pdh_time <= pdh_time_INIT;
- pdh_ok_delay_flag <= END;
-
- locked_fail_count <= 8'd0; //锁定失败计数
-
- analog_switch_1 <= OFF;
- analog_switch_2 <= OFF;
- sawtooth_control <= OFF;
-
- system_run_task_state <= 8'd1;
- end
-
- 8'd1:
- begin
- //init i = 0
- dac_to_temperature_i <= dac_to_temperature_spare;
- N <= init_N;
- K <= init_K;
- DIR <= init_DIR; //init 扫描方向
-
- system_run_task_state <= 8'd2;
-
- end
-
- 8'd2:
- begin
- //start pzt scanning
- analog_switch_1 <= OFF;
- analog_switch_2 <= ON;
-
- //开启锯齿波扫描
- sawtooth_control <= ON;
-
- //T(i) = V * step * i;
- dac_ch1 <= dac_to_temperature_i;
- time_count <= 0;
- time_ones <= 0;
- system_run_task_state <= 8'd3;
- end
-
- 8'd3:
- begin
- //wait 4 - 10s
- if(time_count == T1S) //1s
- begin
- time_ones <= time_ones + 1'b1;
-
- if(time_ones == T2S) //2s
- begin
- search_mode(); //扫描模式
- dac_ch1 <= dac_to_temperature_i; //更新数据
- time_ones <= 0;
- end
-
- time_count <= 0;
- end
- else
- begin
- time_count <= time_count + 1'b1;
-
- //PDH OK? //判断是否找到信号
- if(pdh_ok == LOCK)
- begin
- pdh_ok_count <= pdh_ok_count + 1'b1;
- pdh_ok_delay_flag <= START; //开始延时
- time_count <= 0;
- time_ones <= 0;
- pdh_time_count <= 0;
- system_run_task_state <= 8'd4;
- end
- end
- end
-
- 8'd4: //PDH OK Yes
- begin
-
- //锯齿波扫描延长2S
- if(time_count == T1S) //1s
- begin
- time_ones <= time_ones + 1'b1;
-
- if(time_ones == T2S) //2s
- begin
-
- if(pdh_ok_count >= pdh_ok_count_N ) //真信号
- begin
- //pdh_ok_count <= 8'd0;
- pdh_time_count <= 0;
- system_run_task_state <= 8'd5; //搜索到pdh
- end
- else
- begin
- system_run_task_state <= 8'd3; //重新扫描
- pdh_ok_count <= 8'd0;
- end
-
- time_ones <= 0;
- end
-
- time_count <= 32'd0;
- end
- else
- begin
- time_count <= time_count + 1'b1;
-
- //pdh误触发处理
- //开始延时
- if(pdh_ok_delay_flag == START)
- begin
- if(pdh_time_count == pdh_time ) //ms
- begin
- pdh_time_count <= 32'd0;
- pdh_ok_delay_flag <= END;
- end
- else
- pdh_time_count <= pdh_time_count + 1'b1;
- end
- else
- begin
- if(pdh_ok == LOCK)
- begin
- pdh_ok_count <= pdh_ok_count + 1'b1;
- pdh_ok_delay_flag <= START;
- end
- end
- end
- end
-
- 8'd5://search pdh ok
- begin
-
- //stop pzt scanning
- analog_switch_2 <= OFF;
- //analog_switch_1 <= ON;
- sawtooth_control <= OFF;
-
- /*
- //100MS等待
- if(time_count == T100MS) //1s
- begin
- system_run_task_state <= 8'd8;
- time_count <= 32'd0;
- end
- else
- time_count <= time_count + 1'b1;
-
- */
- end
-
- /*
- 8'd8:
- begin
-
- //锁入过程
- //analog_switch_2 <= OFF;
- analog_switch_1 <= ON;
-
- //2S判断一次
- if(time_count == T1S) //1s
- begin
- time_ones <= time_ones + 1'b1;
- time_count <= 32'd0;
- end
- else
- time_count <= time_count + 1'b1;
-
- if(time_ones == T2S) //2s
- begin
-
- if(locked == LOCK)
- system_run_task_state <= 8'd11; //已锁定
- else
- system_run_task_state <= 8'd9; //未锁定
-
- time_ones <= 0;
- end
- end
-
- 8'd9: //锁入失败
- begin
-
- //锁定失败计数
- locked_fail_count <= locked_fail_count + 1'b1;
-
- if(locked_fail_count < 8'd5)
- begin
- system_run_task_state <= 10;
- end
- else
- begin
- if(dac_to_temperature_i > 14'd0)
- dac_to_temperature_i <= dac_to_temperature_i - 1'b1;
-
- analog_switch_1 <= OFF;
- analog_switch_2 <= ON;
-
- locked_fail_count <= 8'd0;
-
- system_run_task_state <= 3;
- end
- end
- 8'd10:
- begin
-
- analog_switch_1 <= OFF;
-
- //2S判断一次
- if(time_count == T1S) //1s
- begin
- time_ones <= time_ones + 1'b1;
- time_count <= 32'd0;
- end
- else
- time_count <= time_count + 1'b1;
-
- if(time_ones == T2S) //2s
- begin
- system_run_task_state <= 8;
- time_ones <= 0;
- end
-
- end
-
-
- //锁定状态下的运行
- 8'd11:
- begin
- //5S判断一次
- if(time_count == T1S) //1s
- begin
- time_ones <= time_ones + 1'b1;
- time_count <= 32'd0;
- end
- else
- time_count <= time_count + 1'b1;
-
- if(time_ones == T5S) //5s
- begin
-
- //电压 > 1 并且 处于锁定状态
- if(adc_ch1_data > 16'sd6553 && dac_to_temperature_i < 14'd16383 && locked == LOCK)
- begin
- dac_to_temperature_i <= dac_to_temperature_i - 1;
- end
- else if(adc_ch1_data < -16'sd6553 && dac_to_temperature_i > 14'd0 && locked == LOCK)
- begin
- dac_to_temperature_i <= dac_to_temperature_i + 1;
- end
-
- //T(i) = V * step * i;
- dac_ch1 <= dac_to_temperature_i;
-
- time_ones <= 0;
-
- end
-
-
- if(locked == UNLOCK) //unlock
- begin
-
-
- dac_to_temperature_spare <= dac_to_temperature_i; //记录失锁值 从新扫描时从此值开始
- time_count <= 0;
- time_ones <= 0;
- system_run_task_state <= 8'd2; //重新进入扫描模式
-
- end
- end
- */
-
- default:
- system_run_task_state <= 8'd0;
- endcase
- end
-
- endtask
-
- // 扫描模式
- task search_mode;
- begin
- //切换扫描方向
- if(DIR == 4'd1)
- begin
-
- if(dac_to_temperature_i < (dac_to_temperature_spare + N))
- begin
- dac_to_temperature_i <= dac_to_temperature_i + 1'b1;
- end
- else
- begin
- DIR <= DIR + 1'b1;
- end
-
- end
- else if(DIR == 4'd2)
- begin
-
- if(dac_to_temperature_i > (dac_to_temperature_spare - N))
- begin
- dac_to_temperature_i <= dac_to_temperature_i - 1'b1;
- end
- else
- begin
- DIR <= DIR + 1'b1;
- end
-
- end
- else if(DIR >= 4'd3)
- begin
-
- //扩大扫描范围
- if(((dac_to_temperature_spare + (K * N)) < 14'd16383) && ((dac_to_temperature_spare - (K * N)) > 14'd0))
- begin
- N <= (K * N);
- DIR <= init_DIR;
- end
- else
- begin
- dac_to_temperature_spare <= 14'd8192; //0V
- system_run_task_state <= 8'd2; //超出范围重新扫描
-
- end
- end
- end
- endtask
- endmodule
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