miniprogram: add iap mp for ble OTA

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

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+
+let crc16 = require('./crc16.js')
+
+const SOH = 0x01 /* start of 128-byte data packet */
+const STX = 0x02  /* start of 1024-byte data packet */
+const EOT = 0x04  /* end of transmission */
+const ACK = 0x06 /* acknowledge */
+const NAK = 0x15 /* negative acknowledge */
+const CA = 0x18 /* two of these in succession aborts transfer */
+const CRC16 = 0x43  /* 'C' == 0x43, request 16-bit CRC */
+const NEGATIVE_BYTE = 0xFF
+
+const ABORT1 = 0x41  /* 'A' == 0x41, abort by user */
+const ABORT2 = 0x61  /* 'a' == 0x61, abort by user */
+
+const NAK_TIMEOUT = 10000
+const DOWNLOAD_TIMEOUT = 1000 /* One second retry delay */
+const MAX_ERRORS = 10
+
+const NORMAL_LEN = 128;
+const LONG_LEN = 1024;
+const DATA_INDEX = 3;
+
+function getNormalPacket(id, contentBuf) {
+  let buf = new Uint8Array(NORMAL_LEN + 3 + 2); //NORMAL_LEN
+  let i = 0;
+  buf[i++] = SOH;
+
+  buf[i++] = id;
+  buf[i++] = 0xFF - id;
+
+  if (contentBuf.length > NORMAL_LEN) {
+    throw new Error("Over normal packet size limit");
+  }
+
+  for (let j = 0; j < contentBuf.length; j++) {
+    buf[i++] = contentBuf[j];
+  }
+
+  while (i < NORMAL_LEN + 3) {
+    buf[i++] = 0x1A;
+  }
+  let bufcrc = buf.slice(3, 3 + NORMAL_LEN)
+  let crc = crc16(bufcrc, NORMAL_LEN);
+
+  buf[i++] = (crc >> 8) & 0xFF;
+  buf[i++] = crc & 0xFF;
+
+  // console.log("packet forming End i = ", i);
+
+  return buf;
+}
+
+function getLongPacket (id, contentBuf) {
+  let buf = new Uint8Array(LONG_LEN + 3 + 2);
+  let i = 0;
+  buf[i++] = STX;
+
+  buf[i++] = id;
+  buf[i++] = 0xFF - id;
+
+  if (contentBuf.length > LONG_LEN) {
+    throw new Error("Over long packet size limit");
+  }
+
+  for (let j = 0; j < contentBuf.length; j++) {
+    buf[i++] = contentBuf[j];
+  }
+
+  while (i < LONG_LEN + 3) {
+    buf[i++] = 0x1A;
+  }
+  let bufcrc = buf.slice(3, LONG_LEN + 3)
+  let crc = crc16(bufcrc, LONG_LEN);
+
+  buf[i++] = (crc >> 8) & 0xFF;
+  buf[i++] = crc & 0xFF;
+
+  // console.log("packet forming End i = ", i);
+
+  return buf;
+}
+function getZeroContent (fileSymbol, fileLen) {
+
+  let buf = new Uint8Array(128);
+
+  // let fileLenBuf = Uint8Array.from(fileLen + '')
+  // let symbolBuf = Uint8Array.from(fileSymbol)
+  let fileLenStr = fileLen.toString()
+  let i = 0, j = 0;
+  for (j = 0; j < fileSymbol.length; j++) {
+    buf[i++] = fileSymbol.charCodeAt(j)
+  }
+  buf[i++] = 0;
+  for (j = 0; j < fileLenStr.length; j++) {
+    buf[i++] = fileLenStr.charCodeAt(j)
+  }
+  // buf[i++] = 32;
+
+  return buf;
+}
+
+let packet = {
+  getZeroContent: getZeroContent,
+  getNormalPacket: getNormalPacket,
+  getLongPacket: getLongPacket
+};
+
+module.exports = packet;