refactor(vd960Loop): 算法回退到 DLD154V4B，四通道适配

- 用 DLD154V4B vd1_task/per_channel 替换 vds_task 复杂算法
- 移除 FUNCTION_B/二次判断/快速变化/多重确认等增强特性
- 保留平坦性离开算法 (CN200910309382)，每通道独立状态
- 灵敏度表改为 DLD154V4B 4级: {216,108,36,10} / {108,72,18,9}
- 清理废弃类型: FltHistoryManager, Loop_ACS_Info, StageRangeConfig 等
- 首次添加 vd960DBN 完整源码

vd960DBN/SRC/Peripheral/inc/ch32v20x_opa.h

@@ -0,0 +1,74 @@
+/********************************** (C) COPYRIGHT  *******************************
+ * File Name          : ch32v20x_opa.h
+ * Author             : WCH
+ * Version            : V1.0.0
+ * Date               : 2021/06/06
+ * Description        : This file contains all the functions prototypes for the
+ *                      OPA firmware library.
+*********************************************************************************
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* Attention: This software (modified or not) and binary are used for 
+* microcontroller manufactured by Nanjing Qinheng Microelectronics.
+*******************************************************************************/
+#ifndef __CH32V20x_OPA_H
+#define __CH32V20x_OPA_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "ch32v20x.h"
+
+#define OPA_PSEL_OFFSET    3
+#define OPA_NSEL_OFFSET    2
+#define OPA_MODE_OFFSET    1
+
+/* OPA member enumeration */
+typedef enum
+{
+    OPA1 = 0,
+    OPA2,
+    OPA3,
+    OPA4
+} OPA_Num_TypeDef;
+
+/* OPA PSEL enumeration */
+typedef enum
+{
+    CHP0 = 0,
+    CHP1
+} OPA_PSEL_TypeDef;
+
+/* OPA NSEL enumeration */
+typedef enum
+{
+    CHN0 = 0,
+    CHN1
+} OPA_NSEL_TypeDef;
+
+/* OPA out channel enumeration */
+typedef enum
+{
+    OUT_IO_OUT0 = 0,
+    OUT_IO_OUT1
+} OPA_Mode_TypeDef;
+
+/* OPA Init Structure definition */
+typedef struct
+{
+    OPA_Num_TypeDef  OPA_NUM; /* Specifies the members of OPA */
+    OPA_PSEL_TypeDef PSEL;    /* Specifies the positive channel of OPA */
+    OPA_NSEL_TypeDef NSEL;    /* Specifies the negative channel of OPA */
+    OPA_Mode_TypeDef Mode;    /* Specifies the mode of OPA */
+} OPA_InitTypeDef;
+
+void OPA_DeInit(void);
+void OPA_Init(OPA_InitTypeDef *OPA_InitStruct);
+void OPA_StructInit(OPA_InitTypeDef *OPA_InitStruct);
+void OPA_Cmd(OPA_Num_TypeDef OPA_NUM, FunctionalState NewState);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif