From e6c5a02c50bbba4df47c362a61694287182c9399 Mon Sep 17 00:00:00 2001
From: xiaowusky <chenyangyang3858@dingtalk.com>
Date: Tue, 21 Nov 2023 14:38:35 +0800
Subject: [PATCH] =?UTF-8?q?desc:=E6=95=B0=E6=8D=AE=E6=A0=87=E5=AE=9A?=
 =?UTF-8?q?=E5=91=BD=E4=BB=A4=E5=B0=81=E8=A3=85?=
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---
 .../watcher/port/cmd/CalibrationCmd.kt        | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 app/src/main/java/com/yinuo/safetywatcher/watcher/port/cmd/CalibrationCmd.kt

diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/cmd/CalibrationCmd.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/cmd/CalibrationCmd.kt
new file mode 100644
index 0000000..4adbe76
--- /dev/null
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/cmd/CalibrationCmd.kt
@@ -0,0 +1,55 @@
+package com.yinuo.safetywatcher.watcher.port.cmd
+
+/**
+ * 校准命令
+ * @param index 传感器编号 00 01 02 03
+ * @param target 目标值
+ */
+class CalibrationCmd(private val index: Int, private val target: Int) {
+    val ZERO = 0x87.toByte()
+    val SPAN = 0x88.toByte()
+
+    fun buildZeroCmd(): ByteArray {
+        return build(ZERO)
+    }
+
+    fun buildSPANCmd(): ByteArray {
+        return build(SPAN)
+    }
+
+    private fun build(cmd: Byte): ByteArray {
+        var highBit: Byte = 0x00
+        var lowBit: Byte = 0x00
+        if (index != 0) {
+            highBit = (target shr 8 and FF).toByte()
+            lowBit = (target and FF).toByte()
+        }
+        return byteArrayOf(
+            0xFF.toByte(),
+            index.toByte(),
+            cmd,
+            highBit,
+            lowBit,
+            0x00,
+            0x00,
+            0x00
+        ).calibrationSum()
+    }
+}
+
+private fun ByteArray.calibrationSum(): ByteArray {
+    return this.plus(getCheckSum(this))
+}
+
+fun getCheckSum(packet: ByteArray): Byte {
+    var checksum = 0
+    for (i in packet.indices) {
+        if (i in 1..7) {
+            checksum += packet[i]
+        }
+    }
+    checksum = 0xffff - checksum
+    checksum += 1
+    return checksum.toByte()
+}
+