script/libs/rc522.lua

   1 --[[
   2 @module rc522
   3 @summary rc522 非接触式读写卡驱动
   4 @version 1.0
   5 @date    2022.06.14
   6 @author  Dozingfiretruck
   7 @usage
   8 --注意:因使用了sys.wait()所有api需要在协程中使用
   9 -- 用法实例
  10 local rc522 = require "rc522"
  11 sys.taskInit(function()
  12     spi_rc522 = spi.setup(0,nil,0,0,8,10*1000*1000,spi.MSB,1,0)
  13     rc522.init(0,pin.PB04,pin.PB01)
  14     wdata = {0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}
  15     while 1 do
  16         rc522.write_datablock(8,wdata)
  17         for i=0,63 do
  18             local a,b = rc522.read_datablock(i)
  19             if a then
  20                 print("read",i,b:toHex())
  21             end
  22         end
  23         sys.wait(500)
  24     end
  25 end)
  26 ]]
  27
  28
  29 local rc522 = {}
  30
  31 local sys = require "sys"
  32
  33 local rc522_spi,rc522_rst,rc522_irq,rc522_cs
  34
  35 ---器件所用地址
  36 local rc522_idle              =       0x00   --取消当前命令
  37 local rc522_authent           =       0x0E   --验证密钥
  38 local rc522_receive           =       0x08   --接收数据
  39 local rc522_transmit          =       0x04   --发送数据
  40 local rc522_transceive        =       0x0C   --发送并接收数据
  41 local rc522_resetphase        =       0x0F   --复位
  42 local rc522_calccrc           =       0x03   --CRC计算
  43
  44 --Mifare_One卡片命令字
  45 rc522.reqidl                 =       0x26   --寻天线区内未进入休眠状态
  46 rc522.reqall                 =       0x52   --寻天线区内全部卡
  47 local rc522_anticoll1        =       0x93   --防冲撞
  48 local rc522_anticoll2        =       0x95   --防冲撞
  49 local rc522_authent1a        =       0x60   --验证A密钥
  50 local rc522_authent1b        =       0x61   --验证B密钥
  51 local rc522_read             =       0x30   --读块
  52 local rc522_write            =       0xA0   --写块
  53 local rc522_decrement        =       0xC0   --扣款
  54 local rc522_increment        =       0xC1   --充值
  55 local rc522_restore          =       0xC2   --调块数据到缓冲区
  56 local rc522_transfer         =       0xB0   --保存缓冲区中数据
  57 local rc522_halt             =       0x50   --休眠
  58
  59 --MF522寄存器定义
  60 -- PAGE 0
  61 local rc522_rfu00            =       0x00 --保留为将来之用
  62 local rc522_com_mand         =       0x01 --启动和停止命令的执行
  63 local rc522_com_ie           =       0x02 --中断请求传递的使能和禁能控制位
  64 local rc522_divl_en          =       0x03 --中断请求传递的使能和禁能控制位
  65 local rc522_com_irq          =       0x04 --包含中断请求标志
  66 local rc522_div_irq          =       0x05 --包含中断请求标志
  67 local rc522_error            =       0x06 --错误标志，指示执行的上个命令的错误状态
  68 local rc522_status1          =       0x07 --包含通信的状态标志
  69 local rc522_status2          =       0x08 --包含接收器和发送器的状态标志
  70 local rc522_fifo_data        =       0x09 --64 字节 FIFO 缓冲区的输入和输出
  71 local rc522_fifo_level       =       0x0A --指示 FIFO 中存储的字节数
  72 local rc522_water_level      =       0x0B --定义 FIFO 下溢和上溢报警的 FIFO 深度
  73 local rc522_control          =       0x0C --不同的控制寄存器
  74 local rc522_bit_framing      =       0x0D --面向位的帧的调节
  75 local rc522_coll             =       0x0E --RF 接口上检测到的第一个位冲突的位的位置
  76 local rc522_rfu0f            =       0x0F --保留为将来之用
  77 -- PAGE 1
  78 local RFU10                  =       0x10 --保留为将来之用
  79 local rc522_mode             =       0x11 --定义发送和接收的常用模式
  80 local rc522_tx_mode          =       0x12 --定义发送过程的数据传输速率
  81 local rc522_rx_mode          =       0x13 --定义接收过程中的数据传输速率
  82 local rc522_tx_control       =       0x14 --控制天线驱动器管脚 TX1 和 TX2 的逻辑特性
  83 local rc522_tx_ayto          =       0x15 --控制天线驱动器的设置
  84 local rc522_tx_sel           =       0x16 --选择天线驱动器的内部源
  85 local rc522_rx_sel           =       0x17 --选择内部的接收器设置
  86 local rc522_rx_threshold     =       0x18 --选择位译码器的阈值
  87 local rc522_demod            =       0x19 --定义解调器的设置
  88 local rc522_rfu1a            =       0x1A --保留为将来之用
  89 local rc522_rfu1b            =       0x1B --保留为将来之用
  90 local rc522_mifare           =       0x1C --控制 ISO 14443/MIFARE 模式中 106kbit/s 的通信
  91 local rc522_rfu1d            =       0x1D --保留为将来之用
  92 local rc522_rfu1e            =       0x1E --保留为将来之用
  93 local rc522_serial_speed     =       0x1F --选择串行 UART 接口的速率
  94 -- PAGE 2
  95 local rc522_rfu20            =       0x20 --保留为将来之用
  96 local rc522_crcresult_m      =       0x21 --显示 CRC 计算的实际 MSB 值
  97 local rc522_crcresult_l      =       0x22 --显示 CRC 计算的实际 LSB 值
  98 local rc522_rfu23            =       0x23 --保留为将来之用
  99 local rc522_mod_width        =       0x24 --控制 ModWidth 的设置
 100 local rc522_rfu25            =       0x25 --保留为将来之用
 101 local rc522_rfcfg            =       0x26 --配置接收器增益
 102 local rc522_gsn              =       0x27 --选择天线驱动器管脚 TX1 和 TX2 的调制电导
 103 local rc522_cwgscfg          =       0x28 --选择天线驱动器管脚 TX1 和 TX2 的调制电导
 104 local rc522_modgscfg         =       0x29 --选择天线驱动器管脚 TX1 和 TX2 的调制电导
 105 local rc522_tmode            =       0x2A --定义内部定时器的设置
 106 local rc522_tprescaler       =       0x2B --定义内部定时器的设置
 107 local rc522_tpreload_h       =       0x2C --描述 16 位长的定时器重装值
 108 local rc522_tpreload_l       =       0x2D --描述 16 位长的定时器重装值
 109 local rc522_tcounter_value_h =       0x2E --描述 16 位长的定时器重装值
 110 local rc522_tcounter_value_l =       0x2F --描述 16 位长的定时器重装值
 111 -- PAGE 3
 112 local rc522_rfu30            =       0x30 --保留为将来之用
 113 local rc522_testsel1         =       0x31 --常用测试信号的配置
 114 local rc522_testsel2         =       0x32 --常用测试信号的配置和 PRBS 控制
 115 local rc522_testpin_en       =       0x33 --D1-D7 输出驱动器的使能管脚（注：仅用于串行接口）
 116 local rc522_testpin_value    =       0x34 --定义 D1-D7 用作 I/O 总线时的值
 117 local rc522_testbus          =       0x35 --显示内部测试总线的状态
 118 local rc522_autotest         =       0x36 --控制数字自测试
 119 local rc522_version          =       0x37 --显示版本
 120 local rc522_analogtest       =       0x38 --控制管脚 AUX1 和 AUX2
 121 local rc522_testadc1         =       0x39 --定义 TestDAC1 的测试值
 122 local rc522_testadc2         =       0x3A --定义 TestDAC2 的测试值
 123 local rc522_testadc          =       0x3B --显示 ADC I 和 Q 通道的实际值
 124 local rc522_rfu3c            =       0x3C --保留用于产品测试
 125 local rc522_rfu3d            =       0x3D --保留用于产品测试
 126 local rc522_rfu3e            =       0x3E --保留用于产品测试
 127 local rc522_rfu3f                    =       0x3F --保留用于产品测试
 128
 129 local Key_A = string.char(0xff,0xff,0xff,0xff,0xff,0xff)
 130 local Key_B = string.char(0xff,0xff,0xff,0xff,0xff,0xff)
 131
 132 --[[
 133 写rc522寄存器
 134 @api rc522.set_bit_mask(address, value)
 135 @number address 地址
 136 @number value    值
 137 @usage
 138 write_rawrc(rc522_bit_framing,0x07)
 139 ]]
 140 local function write_rawrc(address, value)
 141     rc522_cs(0)
 142     local data = string.char((address<<1)&0x7E) .. string.char(value)
 143     spi.send(rc522_spi, data)
 144     -- rc522_spi:send(data)
 145     rc522_cs(1)
 146 end
 147
 148 --[[
 149 读rc522寄存器
 150 @api rc522.read_rawrc(address)
 151 @number address 地址
 152 @return number 寄存器值
 153 @usage
 154 local n = read_rawrc(rc522_com_irq)
 155 ]]
 156 local function read_rawrc(address)
 157     rc522_cs(0)
 158     local data = string.char(((address<<1)&0x7E)|0x80)
 159     spi.send(rc522_spi, data)
 160     local val = spi.recv(rc522_spi,1)
 161     -- rc522_spi:send(data)
 162     -- local val = rc522_spi:recv(1)
 163     rc522_cs(1)
 164     return string.byte(val)
 165 end
 166
 167 --[[
 168 对rc522寄存器置位
 169 @api rc522.set_bit_mask(address, mask)
 170 @number address 地址
 171 @number mask    置位值
 172 @usage
 173 rc522.set_bit_mask (rc522_fifo_level, 0x80)
 174 ]]
 175 function rc522.set_bit_mask(address, mask)
 176     local current = read_rawrc(address)
 177     write_rawrc(address, bit.bor(current, mask))
 178 end
 179
 180 --[[
 181 对rc522寄存器清位
 182 @api rc522.clear_bit_mask(address, mask)
 183 @number address 地址
 184 @number mask    清位值
 185 @usage
 186 rc522.clear_bit_mask(rc522_com_irq, 0x80 )
 187 ]]
 188 function rc522.clear_bit_mask(address, mask)
 189     local current = read_rawrc(address)
 190     write_rawrc(address, bit.band(current, bit.bnot(mask)))
 191 end
 192
 193 --[[
 194 命令通讯
 195 @api rc522.command(command,data)
 196 @number command
 197 @number data
 198 @return status data len 结果,返回数据,收到的位长度
 199 @usage
 200 rc522.version()
 201 ]]
 202 function rc522.command(command,data)
 203     local out_data = {}
 204     local len = 0
 205     local status = false
 206     local Irq_en  = 0x00
 207     local waitfor = 0x00
 208     local last_bits,n,l
 209     if command==rc522_authent then
 210         Irq_en   = 0x12;
 211         waitfor = 0x10;
 212     elseif command==rc522_transceive then
 213         Irq_en   = 0x77;
 214         waitfor = 0x30;
 215     end
 216     write_rawrc(0x02, bit.bor(Irq_en, 0x80))
 217     rc522.clear_bit_mask(rc522_com_irq, 0x80 )
 218     write_rawrc (rc522_com_mand, rc522_idle)
 219     rc522.set_bit_mask (rc522_fifo_level, 0x80)
 220     for i=1,#data do
 221         write_rawrc(rc522_fifo_data, data[i])
 222     end
 223     write_rawrc(rc522_com_mand,command )
 224     if ( command == rc522_transceive )then
 225         rc522.set_bit_mask(rc522_bit_framing,0x80)
 226     end
 227     l = 12;
 228     while true do
 229         sys.wait(1)
 230         n = read_rawrc(rc522_com_irq)
 231         l = l - 1
 232         if  not ((l ~= 0) and (bit.band(n, 0x01) == 0) and (bit.band(n, waitfor) == 0)) then
 233             break
 234         end
 235     end
 236     rc522.clear_bit_mask(rc522_bit_framing, 0x80 )
 237     if (l ~= 0)then
 238         if bit.band(read_rawrc(rc522_error), 0x1B) == 0x00 then
 239             status = true
 240             if bit.band(n,Irq_en,0x01)~=0then
 241                 status = false
 242             end
 243             if (command == rc522_transceive )then
 244                 n = read_rawrc(rc522_fifo_level)
 245                 last_bits = bit.band(read_rawrc(rc522_control),0x07)
 246                 if last_bits ~= 0 then
 247                     len = (n - 1) * 8 + last_bits
 248                 else
 249                     len = n * 8
 250                 end
 251                 if n == 0 then
 252                     n = 1
 253                 end
 254                 for i=1, n do
 255                     out_data [ i ] = read_rawrc(rc522_fifo_data)
 256                 end
 257             end
 258         end
 259     else
 260         status = false
 261     end
 262     rc522.set_bit_mask (rc522_control,0x80 )
 263     write_rawrc(rc522_com_mand,rc522_idle )
 264     return status,out_data,len
 265 end
 266
 267 --[[
 268 防冲撞
 269 @api rc522.anticoll(id)
 270 @string id 卡片序列号，4字节
 271 @return status uid 结果,uid
 272 @usage
 273 local status,uid = rc522.anticoll(array_id)
 274 ]]
 275 function rc522.anticoll(id)
 276     local check = 0
 277     local uid
 278     rc522.clear_bit_mask(rc522_status2,0x08)
 279     write_rawrc( rc522_bit_framing, 0x00);
 280     rc522.clear_bit_mask (rc522_coll, 0x80);
 281     local status, back_data = rc522.command(rc522_transceive,{0x93,0x20})
 282     if back_data and #back_data >= 5 then
 283         for i=1,4 do
 284             check = bit.bxor(check,back_data[i])
 285         end
 286         if check ~= back_data[5] then
 287             status = false;
 288         end
 289         uid = string.char(table.unpack(back_data,1,4))
 290     end
 291     rc522.clear_bit_mask( rc522_coll, 0x80 )
 292     return status,uid;
 293 end
 294
 295 --[[
 296 crc计算
 297 @api calculate_crc(data)
 298 @table data 数据
 299 @return table crc值
 300 @usage
 301 local crc = calculate_crc(buff)
 302 ]]
 303 local function calculate_crc(data)
 304     local ret_data = {}
 305     rc522.clear_bit_mask(rc522_div_irq, 0x04)
 306     write_rawrc(rc522_com_mand, rc522_idle)
 307     rc522.set_bit_mask (rc522_fifo_level,0x80 )
 308     for i=1,#data do
 309         write_rawrc(rc522_fifo_data, data[i])
 310     end
 311     write_rawrc(rc522_com_mand, rc522_calccrc)
 312     local i = 0xFF
 313     while true do
 314         local n = read_rawrc(0x05)
 315         i = i - 1
 316         if not ((i ~= 0) and not (n&0x04)) then
 317             break
 318         end
 319     end
 320     ret_data[1] = read_rawrc(0x22)
 321     ret_data[2] = read_rawrc(0x21)
 322     return ret_data
 323 end
 324
 325 --[[
 326 验证卡片密码
 327 @api authstate(mode, addr,key,uid )
 328 @number mode 模式
 329 @number addr 地址
 330 @string key 密码
 331 @string uid uid
 332 @return bool 结果
 333 @usage
 334 status = authstate(rc522_authent1b, addr,Key_B,uid )
 335 ]]
 336 local function authstate( mode, addr,key,uid )
 337     local buff = {}
 338     buff[1] = mode
 339     buff[2] = addr
 340     for i=1,6 do
 341         buff[i+2]=key:byte(i)
 342     end
 343     for i=1,4 do
 344         buff[i+8]=uid:byte(i)
 345     end
 346     local status, back_data = rc522.command(rc522_authent,buff)
 347     if status == true and (read_rawrc(rc522_status2)& 0x08) ~= 0 then
 348         return true
 349     end
 350     return false
 351 end
 352
 353 --[[
 354 写数据到M1卡一块
 355 @api rc522.write(addr, data)
 356 @number addr 块地址(0-63)M1卡总共有16个扇区(每个扇区有：3个数据块+1个控制块),共64个块
 357 @table data 数据
 358 @return bool 结果
 359 @usage
 360 rc522.write(addr, data)
 361 ]]
 362 function rc522.write(addr, data)
 363     local buff = {}
 364     buff[1] = rc522_write;
 365     buff[2] = addr;
 366     local crc = calculate_crc(buff)
 367     buff[3] = crc[1]
 368     buff[4] = crc[2]
 369     local status, back_data, back_bits = rc522.command(rc522_transceive,buff)
 370     if status == true and back_bits == 4 and (back_data[1]& 0x0F)==0x0A then
 371         local buf_w = {}
 372         for i=0, 16 do
 373             table.insert(buf_w, data[i])
 374         end
 375         local crc = calculate_crc(buf_w)
 376         table.insert(buf_w, crc[1])
 377         table.insert(buf_w, crc[2])
 378         status, back_data, back_bits = rc522.command(rc522_transceive,buf_w)
 379         if status == true and back_bits == 4 and (back_data[1]& 0x0F)==0x0A then
 380             return status;
 381         end
 382     end
 383     return status;
 384 end
 385
 386 --[[
 387 写数据到M1卡一块
 388 @api rc522.read(addr)
 389 @number addr 块地址(0-63)M1卡总共有16个扇区(每个扇区有：3个数据块+1个控制块),共64个块
 390 @return bool,string 结果，数据
 391 @usage
 392 rc522.read(addr, data)
 393 ]]
 394 local function read(addr)
 395     local buff = {}
 396     buff[1] = rc522_read;
 397     buff[2] = addr;
 398     local crc = calculate_crc(buff)
 399     buff[3] = crc[1]
 400     buff[4] = crc[2]
 401     local status, back_data, back_bits = rc522.command(rc522_transceive,buff)
 402     if status == true and back_bits == 0x90 then
 403         local data = string.char(table.unpack(back_data,1,16))
 404         return status,data
 405     end
 406     return false
 407 end
 408
 409 --[[
 410 rc522 硬件版本
 411 @api rc522.version()
 412 @return number 硬件版本
 413 @usage
 414 rc522.version()
 415 ]]
 416 function rc522.version()
 417     return read_rawrc(rc522_version)
 418 end
 419
 420 --[[
 421 rc522 命令卡片进入休眠状态
 422 @api rc522.halt()
 423 @return bool 结果
 424 @usage
 425 rc522.halt()
 426 ]]
 427 function rc522.halt()
 428     local buff = {}
 429     buff[1] = rc522_halt;
 430     buff[2] = 0;
 431     local crc = calculate_crc(buff)
 432     buff[3] = crc[1]
 433     buff[4] = crc[2]
 434     local status = rc522.command(rc522_transceive,buff)
 435     return status
 436 end
 437
 438 --[[
 439 rc522 复位
 440 @api rc522.reset()
 441 @usage
 442 rc522.reset()
 443 ]]
 444 function rc522.reset()
 445     rc522_rst(1)
 446     rc522_rst(0)
 447     rc522_rst(1)
 448     write_rawrc(rc522_com_mand, 0x0f)
 449     write_rawrc(rc522_mode, 0x3D)
 450     write_rawrc(rc522_tpreload_l, 30)
 451     write_rawrc(rc522_tpreload_h, 0)
 452     write_rawrc(rc522_tmode, 0x8D)
 453     write_rawrc(rc522_tprescaler, 0x3E)
 454     write_rawrc(rc522_tx_ayto, 0x40)
 455 end
 456
 457 --[[
 458 开启天线
 459 @api rc522.antenna_on()
 460 @usage
 461 rc522.antenna_on()
 462 ]]
 463 function rc522.antenna_on()
 464     local uc = read_rawrc( rc522_tx_control )
 465     if (( uc & 0x03 )==0 ) then
 466         rc522.set_bit_mask(rc522_tx_control, 0x03)
 467     end
 468 end
 469
 470 --[[
 471 关闭天线
 472 @api rc522.antenna_on()
 473 @usage
 474 rc522.antenna_on()
 475 ]]
 476 function rc522.antenna_off()
 477     rc522.clear_bit_mask( rc522_tx_control, 0x03 )
 478 end
 479
 480 --[[
 481 设置rc522工作方式为ISO14443_A
 482 @api rc522_config_isotype()
 483 @usage
 484 rc522_config_isotype()
 485 ]]
 486 local function rc522_config_isotype()
 487     rc522.clear_bit_mask(rc522_status2, 0x08)
 488     write_rawrc(rc522_mode, 0x3D)
 489     write_rawrc(rc522_rx_sel, 0x86)
 490     write_rawrc(rc522_rfcfg, 0x7F)
 491     write_rawrc(rc522_tpreload_l, 30)
 492     write_rawrc(rc522_tpreload_h, 0)
 493     write_rawrc(rc522_tmode, 0x8D)
 494     write_rawrc(rc522_tprescaler, 0x3E)
 495     rc522.antenna_on()
 496 end
 497
 498 --[[
 499 rc522 寻卡
 500 @api rc522.request(req_code)
 501 @number req_code rc522.reqidl 寻天线区内未进入休眠状态 rc522.reqall 寻天线区内全部卡
 502 @return bool tagtype 结果，卡类型
 503 @usage
 504 status,array_id = rc522.request(rc522.reqall)
 505 ]]
 506 function rc522.request(req_code)
 507     rc522.clear_bit_mask(rc522_status2,0x08)
 508     write_rawrc(rc522_bit_framing,0x07)
 509     rc522.set_bit_mask(rc522_tx_control,0x03)
 510     local tagtype
 511     local status, back_data, back_bits = rc522.command(rc522_transceive,{req_code})
 512     if status == true and back_bits == 0x10 then
 513         tagtype = string.char(table.unpack(back_data,1,2))
 514         return status, tagtype
 515     end
 516     return false
 517 end
 518
 519 --[[
 520 选定卡片
 521 @api rc522.select(id)
 522 @number id 卡片序列号，4字节
 523 @return bool 结果
 524 @usage
 525 status = rc522.select(id)
 526 ]]
 527 function rc522.select(id)
 528     if not id then
 529         return false
 530     end
 531     local buff = {}
 532     buff[1]=rc522_anticoll1
 533     buff[2]=0x70
 534     buff[7]=0
 535     for i=1,4 do
 536         buff[i+2]=id:byte(i)
 537         buff[7]= bit.bxor(buff[7],id:byte(i))
 538     end
 539     local crc = calculate_crc(buff)
 540     buff[8]=crc[1]
 541     buff[9]=crc[2]
 542     rc522.clear_bit_mask( rc522_status2, 0x08 )
 543     local status, back_data, back_bits = rc522.command(rc522_transceive,buff)
 544     if status == true and back_bits == 0x18 then
 545         return true
 546     end
 547     return false
 548 end
 549
 550 --[[
 551 按照rc522操作流程写入16字节数据到块
 552 @api rc522.write_datablock(addr,data)
 553 @number addr 任意块地址.M1卡总共有16个扇区(每个扇区有：3个数据块+1个控制块),共64个块
 554 @table data 指向要写入的数据,必须为16个字符
 555 @return bool 结果
 556 @usage
 557 rc522.write_datablock(addr,data)
 558 ]]
 559 function rc522.write_datablock(addr,data)
 560     if #data ~= 16 then
 561         return false
 562     end
 563     local status,array_id = rc522.request(rc522.reqall)
 564     if  status ~= true then
 565         status,array_id = rc522.request(rc522.reqall)
 566     end
 567     if status == true then
 568         local status,uid = rc522.anticoll(array_id)
 569         if not uid then
 570             return false
 571         end
 572         if status == true and uid then
 573             rc522.select(uid)
 574             status = authstate( rc522_authent1b, addr,Key_B,uid )
 575             if status == true then
 576                 status = rc522.write(addr,data)
 577                 rc522.halt()
 578                 return status
 579             end
 580         end
 581     end
 582     return false
 583 end
 584
 585 --[[
 586 按照rc522操作流程读取块
 587 @api rc522.read_datablock(addr)
 588 @number addr 任意块地址.M1卡总共有16个扇区(每个扇区有：3个数据块+1个控制块),共64个块
 589 @return bool string 结果 数据
 590 @usage
 591     for i=0,63 do
 592         local a,b = rc522.read_datablock(i)
 593         if a then
 594             print("read",i,b:toHex())
 595         end
 596     end
 597 ]]
 598 function rc522.read_datablock(addr)
 599     local status,array_id = rc522.request(rc522.reqall)
 600     if  status ~= true then
 601         status,array_id = rc522.request(rc522.reqall)
 602     end
 603     if status == true then
 604         local status,uid = rc522.anticoll(array_id)
 605         if status == true and uid then
 606             rc522.select(uid)
 607             status = authstate( rc522_authent1b, addr,Key_B,uid )
 608             if status == true then
 609                 local status,data = read(addr)
 610                 if status == true then
 611                     return true, data
 612                 end
 613                 rc522.halt()
 614             end
 615         end
 616     end
 617     return false
 618 end
 619
 620 --[[
 621 rc522 初始化
 622 @api rc522.init(spi_id, cs, rst)
 623 @number spi_id spi端口号
 624 @number cs      cs引脚
 625 @number rst     rst引脚
 626 @return bool 初始化结果
 627 @usage
 628 spi_rc522 = spi.setup(0,nil,0,0,8,10*1000*1000,spi.MSB,1,1)
 629 rc522.init(0,pin.PB04,pin.PB01)
 630 ]]
 631 function rc522.init(spi_id,cs,rst)
 632     rc522_spi = spi_id
 633     rc522_cs = gpio.setup(cs, 0, gpio.PULLUP)
 634     rc522_cs(1)
 635     rc522_rst = gpio.setup(rst, 0, gpio.PULLUP)
 636     rc522_rst(1)
 637     rc522.reset()
 638     rc522_config_isotype()
 639     log.debug("rc522.version",rc522.version())
 640     return true
 641 end
 642
 643 function rc522.test()
 644
 645 end
 646
 647 return rc522
 648
 649
 650