miniprogram: add iap mp for ble OTA

tools/Mini_Program/iap/miniprogram/utils/hardware/ble/crc16.js

@@ -0,0 +1,83 @@
+"use strict";
+
+function UpdateCRC16(crcIn, byte) {
+  let crc = crcIn;
+  let inNum = byte | 0x100;
+  do {
+    crc <<= 1;
+    crc = crc & 0xFFFFFFFF;
+    inNum <<= 1;
+    inNum = inNum & 0xFFFFFFFF;
+
+    if (inNum & 0x100) {
+      ++crc;
+    }
+
+    if (crc & 0x10000) {
+      crc ^= 0x1021;
+      crc = crc & 0xFFFFFFFF;
+    }
+
+  } while (!(inNum & 0x10000));
+
+  return crc & 0xffff;
+}
+
+function crc16(data, size) {
+  let crc = 0;
+
+  for (let i = 0; i < size; i++) {
+    crc = UpdateCRC16(crc, data[i])
+  }
+  crc = UpdateCRC16(crc, 0);
+  crc = UpdateCRC16(crc, 0);
+
+  return crc & 0xffff;
+}
+
+
+function crc16_backup(buf, len) {
+  // let crc = 0x0000;
+  let crc = 0xFFFF;
+
+  for (let pos = 0; pos < len; pos++) {
+    // XOR byte into least sig. byte of crc
+    crc ^= buf[pos];
+    crc = crc & 0xFFFF;
+    for (let i = 8; i != 0; i--) { // Loop over each bit
+      if ((crc & 0x0001) != 0) { // If the LSB is set
+        crc >>= 1; // Shift right and XOR 0xA001
+        crc ^= 0xA001;
+        crc = crc & 0xFFFF;
+      }
+      else {// Else LSB is not set
+        crc >>= 1; // Just shift right
+        crc = crc & 0xFFFF;
+      }
+    }
+  }
+  return crc;
+}
+/*
+int calcrc(char *ptr, int count)
+{
+    int  crc;
+    char i;
+    crc = 0;
+    while (--count >= 0)
+    {
+        crc = crc ^ (int) *ptr++ << 8;
+        i = 8;
+        do
+        {
+            if (crc & 0x8000)
+                crc = crc << 1 ^ 0x1021;
+            else
+                crc = crc << 1;
+        } while(--i);
+    }
+    return (crc);
+}
+*/
+
+module.exports = crc16;