@waiting/fingerprint-reader-bp8903/dist/lib/device.js

南天 BP8903 集成键盘 指纹采集、验证

import { info } from '@waiting/log'
export function findDeviceList(deviceOpts, apib) {
    const arr = []

    if (deviceOpts.port > 0) {
        const device = findDevice(deviceOpts.port, deviceOpts, apib)

        if (device.openPort > 0) {
            arr.push(device)
        }
    }
    else {
        throw new Error('deviceOpts.port must be specified')
    }
    return arr
}
export function findDevice(port, deviceOpts, apib) {
    const device = {
        apib,
        deviceOpts,
        inUse: false,
        openPort: port,
    }

    return device
}
/** Sampling fingerprint once, return base64 */
export function readOnce(device, bufLen = 1024) {
    device.deviceOpts.debug && info('staring read once...')
    const buf = Buffer.alloc(bufLen)
    const code = device.apib.ABC_GetFeature(device.openPort, buf, bufLen)
    const ret = code === 1
        ? buf
        : Buffer.alloc(0)

    if (device.deviceOpts.debug) {
        info(`Fingerprint readOnce code: ${code}. (1:succeed, 0/others:failed)`)
    }
    return ret
}
/** Sampling fingerprint 3times, return base64 */
export function readThrice(device, bufLen = 1024) {
    device.deviceOpts.debug && info('staring read thrice...')
    const buf = Buffer.alloc(bufLen)
    const code = device.apib.ABC_GetTemplate(device.openPort, buf, bufLen)
    const ret = code === 1
        ? buf
        : Buffer.alloc(0)

    if (device.deviceOpts.debug) {
        info(`Fingerprint readThice code: ${code}. (1:succeed, 0/others:failed)`)
    }
    return ret
}
export function compareFP(device, fp1, fp2) {
    return new Promise(resolve => {
        // const code = device.apib.ABC_Match(fp1, fp2)
        device.apib.ABC_Match.async(fp1, fp2, (err, code) => {
            resolve(code === 1 ? true : false)
            return code
        })
    })
}