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

南天 BP8903 读银行卡

import { info } from '@waiting/log'
import { dirname, setPathDirectory } from '@waiting/shared-core'
export function connectDevice(device, port) {
    if (device && device.inUse) {
        device.deviceOpts.debug && info('Cautiton: connectDevice() device in use')
        return 0
    }
    const openRet = device.apib.OpenComPort(port, Buffer.from(''), 9600, 1)

    device.deviceOpts.debug && info(`open com ret: ${openRet}`)
    return openRet === 0 ? port : 0
}
export function disconnectDevice(device) {
    const ret = device.apib.CloseComPort()

    device.deviceOpts.debug && info(`disconnectDevice at port: ${device.openPort}, ret: ${ret} `)
    device.inUse = false
    return true
}
/** 检查端口是否已打开 */
export function isDevicePortOpen(device) {
    const ret = device.apib.IsComOpen()

    device.deviceOpts.debug && info(`isPortOpen: ${ret}`)
    return ret === 1 ? true : false
}
export function findDeviceList(deviceOpts, apib) {
    const arr = []

    // 指定了端口
    if (deviceOpts.port > 0) {
        const device = findDevice(deviceOpts.port, deviceOpts, apib)

        if (device.openPort > 0) {
            arr.push(device)
        }
    }
    else {
        // 检测串口. bp8903 为串口接口
        for (let i = 1; i <= 16; i++) {
            const device = findDevice(i, deviceOpts, apib)

            if (device.openPort > 0) {
                arr.push(device)
            }
        }
    }
    return arr
}
export function findDevice(openPort, deviceOpts, apib) {
    const device = {
        apib,
        deviceOpts,
        inUse: false,
        openPort: 0,
    }
    const port = connectDevice(device, openPort)

    if (port > 0 && isDevicePortOpen(device)) {
        device.inUse = true
        device.openPort = port
        deviceOpts.debug && info(`Found device at serial/usb port: ${port}`)
        disconnectDevice(device)
    }
    return device
}
/** 读取银行卡 支持 接触、非接触、磁条 */
export function readAll(device) {
    setPathDirectory(dirname(device.deviceOpts.dllTxt))
    const buf = Buffer.alloc(64)

    if (device.deviceOpts.debug) {
        info('starting reading...')
    }
    const ret = {
        cardno: '',
    }
    const code = device.apib.GetCardNumberFromDev(device.openPort, 
    // Buffer.from('124|A'),
    Buffer.from(''), 3, buf)

    if (code === 0) {
        // 卡号可能重复数字  ...1234557\u0000557
        ret.cardno = buf.toString().replace(/\0+.*$/, '')
    }
    if (device.deviceOpts.debug) {
        info(`readDataBase code: ${code}`)
        info(`readDataBase bufLen: ${buf.byteLength}`)
        info('readDataBase buf: ')
        info(buf)
        info(`readDataBase ret: ${ret}`)
        // info(buf.slice(80))
    }
    return ret
}