89 lines
2.3 KiB
JavaScript
89 lines
2.3 KiB
JavaScript
import { parseRadarData } from '../parsers'
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export function createRadarModule(ble) {
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function requireAuthorized() {
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const state = ble.getState()
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// 协议要求：获取雷达校准数据前必须先完成密钥匹配。
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if (!state.auth || state.auth.keyMatched !== true) {
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throw new Error('请先完成密钥匹配，再执行雷达命令')
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}
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}
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async function sendCommand(commandByte) {
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const { cmd } = ble.getState().characteristics
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if (!cmd || !cmd.uuid) {
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throw new Error('未发现 UUID_CMD 特征值')
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}
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await ble.writeCharacteristic(cmd.uuid, new Uint8Array([commandByte]))
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}
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async function startRadarStream() {
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const profile = ble.getProfile()
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// 协议1.2.2：先密钥匹配，再向 UUID_CMD 写 0xA1。
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requireAuthorized()
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await sendCommand(profile.radar.startCommand)
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return true
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}
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async function stopRadarStream() {
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const profile = ble.getProfile()
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// 停止同样要求处于鉴权通过态，避免误发到未鉴权连接。
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requireAuthorized()
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await sendCommand(profile.radar.stopCommand)
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return true
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}
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async function setNarrowMode(enabled) {
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const profile = ble.getProfile()
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if (!profile.cmd.supportsNarrowMode) {
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throw new Error('当前设备不支持窄床模式设置')
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}
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requireAuthorized()
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await sendCommand(enabled ? 0x7D : 0x7C)
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}
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async function writeFallParams(rawParams) {
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const profile = ble.getProfile()
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if (!profile.cmd.supportsFallParam67) {
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throw new Error('当前设备不支持 0x67 跌倒参数写入')
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}
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requireAuthorized()
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const payload = rawParams instanceof Uint8Array ? rawParams : new Uint8Array(rawParams)
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const packet = new Uint8Array(1 + payload.length)
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packet[0] = 0x67
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packet.set(payload, 1)
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const { cmd } = ble.getState().characteristics
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if (!cmd || !cmd.uuid) {
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throw new Error('未发现 UUID_CMD 特征值')
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}
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await ble.writeCharacteristic(cmd.uuid, packet)
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}
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function parseNotifyPayload(payload) {
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const profile = ble.getProfile()
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return parseRadarData(payload, profile.id)
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}
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return {
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sendCommand,
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startRadarStream,
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stopRadarStream,
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setNarrowMode,
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writeFallParams,
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parseNotifyPayload,
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requireAuthorized
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}
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}
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