git.zerfleddert.de Git - proxmark3-svn/blob - armsrc/i2c.c

   1 //-----------------------------------------------------------------------------
   2 // Willok, June 2018
   3 // Edits by Iceman, July 2018
   4 //
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // The main i2c code, for communications with smart card module
  10 //-----------------------------------------------------------------------------
  11
  12 #include "i2c.h"
  13
  14 #include <stdint.h>
  15 #include <stdbool.h>
  16 #include "string.h"  //for memset memcmp
  17 #include "proxmark3.h"
  18 #include "mifareutil.h" // for MF_DBGLEVEL
  19 #include "BigBuf.h"
  20 #include "apps.h"
  21
  22 #ifdef WITH_SMARTCARD
  23 #include "smartcard.h"
  24 #endif
  25
  26
  27 #define GPIO_RST  AT91C_PIO_PA1
  28 #define GPIO_SCL  AT91C_PIO_PA5
  29 #define GPIO_SDA  AT91C_PIO_PA7
  30
  31 #define SCL_H   HIGH(GPIO_SCL)
  32 #define SCL_L   LOW(GPIO_SCL)
  33 #define SDA_H   HIGH(GPIO_SDA)
  34 #define SDA_L   LOW(GPIO_SDA)
  35
  36 #define SCL_read  (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SCL)
  37 #define SDA_read  (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SDA)
  38
  39 #define I2C_ERROR  "I2C_WaitAck Error"
  40
  41 static volatile unsigned long c;
  42
  43 //      Ö±½ÓÊ¹ÓÃÑ»·À´ÑÓÊ±£¬Ò»¸öÑ»· 6 ÌõÖ¸Áî£¬48M£¬ Delay=1 ´ó¸ÅÎª 200kbps
  44 // timer.
  45 // I2CSpinDelayClk(4) = 12.31us
  46 // I2CSpinDelayClk(1) = 3.07us
  47 static void __attribute__((optimize("O0"))) I2CSpinDelayClk(uint16_t delay) {
  48         for (c = delay * 2; c; c--) {};
  49 }
  50
  51 // communication delay functions
  52 #define I2C_DELAY_1CLK    I2CSpinDelayClk(1)
  53 #define I2C_DELAY_2CLK    I2CSpinDelayClk(2)
  54 #define I2C_DELAY_XCLK(x) I2CSpinDelayClk((x))
  55
  56 #define  ISO7618_MAX_FRAME 255
  57
  58 // try i2c bus recovery at 100kHz = 5uS high, 5uS low
  59 static void I2C_recovery(void) {
  60
  61         DbpString("Performing i2c bus recovery");
  62
  63         // reset I2C
  64         SDA_H; SCL_H;
  65
  66          //9nth cycle acts as NACK
  67         for (int i = 0; i < 10; i++)  {
  68                 SCL_H; WaitUS(5);
  69                 SCL_L; WaitUS(5);
  70         }
  71
  72     //a STOP signal (SDA from low to high while CLK is high)
  73         SDA_L; WaitUS(5);
  74         SCL_H; WaitUS(2);
  75         SDA_H; WaitUS(2);
  76
  77         bool isok = (SCL_read && SDA_read);
  78     if (!SDA_read)
  79                 DbpString("I2C bus recovery  error: SDA still LOW");
  80         if (!SCL_read)
  81                 DbpString("I2C bus recovery  error: SCL still LOW");
  82         if (isok)
  83                 DbpString("I2C bus recovery complete");
  84 }
  85
  86 static void I2C_init(void) {
  87         // Configure reset pin
  88         AT91C_BASE_PIOA->PIO_PPUDR = GPIO_RST;  // disable pull up resistor
  89         AT91C_BASE_PIOA->PIO_MDDR = GPIO_RST;   // push-pull output (multidriver disabled)
  90
  91         // Configure SCL and SDA pins
  92         AT91C_BASE_PIOA->PIO_PPUER |= (GPIO_SCL | GPIO_SDA);  // enable pull up resistor
  93         AT91C_BASE_PIOA->PIO_MDER |= (GPIO_SCL | GPIO_SDA);   // open drain output (multidriver enabled) - requires external pull up resistor
  94
  95         // set all three outputs to high
  96         AT91C_BASE_PIOA->PIO_SODR |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
  97
  98         // configure all three pins as output, controlled by PIOA
  99         AT91C_BASE_PIOA->PIO_OER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
 100         AT91C_BASE_PIOA->PIO_PER |= (GPIO_SCL | GPIO_SDA | GPIO_RST);
 101
 102         bool isok =  (SCL_read && SDA_read);
 103         if ( !isok )
 104                 I2C_recovery();
 105
 106 }
 107
 108 // set the reset state
 109 static void I2C_SetResetStatus(uint8_t LineRST, uint8_t LineSCK, uint8_t LineSDA) {
 110         if (LineRST)
 111                 HIGH(GPIO_RST);
 112         else
 113                 LOW(GPIO_RST);
 114
 115         if (LineSCK)
 116                 HIGH(GPIO_SCL);
 117         else
 118                 LOW(GPIO_SCL);
 119
 120         if (LineSDA)
 121                 HIGH(GPIO_SDA);
 122         else
 123                 LOW(GPIO_SDA);
 124 }
 125
 126 // Reset the SIM_Adapter, then  enter the main program
 127 // Note: the SIM_Adapter will not enter the main program after power up. Please run this function before use SIM_Adapter.
 128 static void I2C_Reset_EnterMainProgram(void) {
 129         StartTicks();
 130         I2C_init();
 131         I2C_SetResetStatus(0, 0, 0);
 132         WaitMS(30);
 133         I2C_SetResetStatus(1, 0, 0);
 134         WaitMS(30);
 135         I2C_SetResetStatus(1, 1, 1);
 136         WaitMS(10);
 137 }
 138
 139 // Wait for the clock to go High.
 140 static bool WaitSCL_H_delay(uint32_t delay) {
 141         while (delay--) {
 142                 if (SCL_read) {
 143                         return true;
 144                 }
 145                 I2C_DELAY_1CLK;
 146         }
 147         return false;
 148 }
 149
 150 // 15000 * 3.07us = 46050us. 46.05ms
 151 static bool WaitSCL_H(void) {
 152         return WaitSCL_H_delay(15000);
 153 }
 154
 155 bool WaitSCL_L_delay(uint32_t delay) {
 156         while (delay--) {
 157                 if (!SCL_read) {
 158                         return true;
 159                 }
 160                 I2C_DELAY_1CLK;
 161         }
 162         return false;
 163 }
 164
 165 bool WaitSCL_L(void) {
 166         return WaitSCL_L_delay(15000);
 167 }
 168
 169 static bool I2C_Start(void) {
 170
 171         I2C_DELAY_XCLK(4);
 172         SDA_H; I2C_DELAY_1CLK;
 173         SCL_H;
 174         if (!WaitSCL_H()) return false;
 175
 176         I2C_DELAY_2CLK;
 177
 178         if (!SCL_read) return false;
 179         if (!SDA_read) return false;
 180
 181         SDA_L; I2C_DELAY_2CLK;
 182         return true;
 183 }
 184
 185 // send i2c STOP
 186 static void I2C_Stop(void) {
 187         SCL_L; I2C_DELAY_2CLK;
 188         SDA_L; I2C_DELAY_2CLK;
 189         SCL_H; I2C_DELAY_2CLK;
 190         if (!WaitSCL_H()) return;
 191         SDA_H;
 192         I2C_DELAY_XCLK(8);
 193 }
 194
 195 static bool I2C_WaitAck(void) {
 196         SCL_L; I2C_DELAY_1CLK;
 197         SDA_H; I2C_DELAY_1CLK;
 198         SCL_H;
 199         if (!WaitSCL_H())
 200                 return false;
 201
 202         I2C_DELAY_2CLK;
 203         I2C_DELAY_2CLK;
 204         if (SDA_read) {
 205                 SCL_L;
 206                 return false;
 207         }
 208         SCL_L;
 209         return true;
 210 }
 211
 212 static void I2C_SendByte(uint8_t data) {
 213         uint8_t bits = 8;
 214
 215         while (bits--) {
 216                 SCL_L;
 217                 I2C_DELAY_1CLK;
 218
 219                 if (data & 0x80)
 220                         SDA_H;
 221                 else
 222                         SDA_L;
 223
 224                 data <<= 1;
 225
 226                 I2C_DELAY_1CLK;
 227
 228                 SCL_H;
 229                 if (!WaitSCL_H())
 230                         return;
 231
 232                 I2C_DELAY_2CLK;
 233         }
 234         SCL_L;
 235 }
 236
 237 bool I2C_is_available(void) {
 238         I2C_Reset_EnterMainProgram();
 239         if (!I2C_Start())  // some other device is active on the bus
 240                 return true;
 241         I2C_SendByte(I2C_DEVICE_ADDRESS_MAIN & 0xFE);
 242         if (!I2C_WaitAck()) {  // no response from smartcard reader
 243                 I2C_Stop();
 244                 return false;
 245         }
 246         I2C_Stop();
 247         return true;
 248 }
 249
 250 #ifdef WITH_SMARTCARD
 251 // Reset the SIM_Adapter, then enter the bootloader program
 252 // Reserve£ºFor firmware update.
 253 static void I2C_Reset_EnterBootloader(void) {
 254         I2C_SetResetStatus(0, 1, 1);
 255         WaitMS(100);
 256         I2C_SetResetStatus(1, 1, 1);
 257         WaitMS(10);
 258 }
 259
 260 // Wait max 300ms or until SCL goes LOW.
 261 // Which ever comes first
 262 static bool WaitSCL_L_300ms(void) {
 263         volatile uint16_t delay = 310;
 264         while ( delay-- ) {
 265                 // exit on SCL LOW
 266                 if (!SCL_read)
 267                         return true;
 268
 269                 WaitMS(1);
 270         }
 271         return (delay == 0);
 272 }
 273
 274 static bool I2C_WaitForSim() {
 275         // variable delay here.
 276         if (!WaitSCL_L_300ms())
 277                 return false;
 278
 279         // 8051 speaks with smart card.
 280         // 1000*50*3.07 = 153.5ms
 281         // 1byte transfer == 1ms with max frame being 256bytes
 282         if (!WaitSCL_H_delay(10 * 1000 * 50))
 283                 return false;
 284
 285         return true;
 286 }
 287
 288 // Send i2c ACK
 289 static void I2C_Ack(void) {
 290         SCL_L; I2C_DELAY_2CLK;
 291         SDA_L; I2C_DELAY_2CLK;
 292         SCL_H; I2C_DELAY_2CLK;
 293         if (!WaitSCL_H()) return;
 294         SCL_L; I2C_DELAY_2CLK;
 295 }
 296
 297 // Send i2c NACK
 298 static void I2C_NoAck(void) {
 299         SCL_L; I2C_DELAY_2CLK;
 300         SDA_H; I2C_DELAY_2CLK;
 301         SCL_H; I2C_DELAY_2CLK;
 302         if (!WaitSCL_H()) return;
 303         SCL_L; I2C_DELAY_2CLK;
 304 }
 305
 306 static int16_t I2C_ReadByte(void) {
 307         uint8_t bits = 8, b = 0;
 308
 309         SDA_H;
 310         while (bits--) {
 311                 b <<= 1;
 312                 SCL_L;
 313                 if (!WaitSCL_L()) return -2;
 314
 315                 I2C_DELAY_1CLK;
 316
 317                 SCL_H;
 318                 if (!WaitSCL_H()) return -1;
 319
 320                 I2C_DELAY_1CLK;
 321                 if (SDA_read)
 322                         b |= 0x01;
 323         }
 324         SCL_L;
 325         return b;
 326 }
 327
 328 // Sends one byte  ( command to be written, SlaveDevice address)
 329 static bool I2C_WriteCmd(uint8_t device_cmd, uint8_t device_address) {
 330         bool bBreak = true;
 331         do {
 332                 if (!I2C_Start())
 333                         return false;
 334
 335                 I2C_SendByte(device_address & 0xFE);
 336                 if (!I2C_WaitAck())
 337                         break;
 338
 339                 I2C_SendByte(device_cmd);
 340                 if (!I2C_WaitAck())
 341                         break;
 342
 343                 bBreak = false;
 344         } while (false);
 345
 346         I2C_Stop();
 347         if (bBreak) {
 348                 if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 349                 return false;
 350         }
 351         return true;
 352 }
 353
 354 // Sends 1 byte data (Data to be written, command to be written , SlaveDevice address  ).
 355 static bool I2C_WriteByte(uint8_t data, uint8_t device_cmd, uint8_t device_address) {
 356         bool bBreak = true;
 357         do {
 358                 if (!I2C_Start())
 359                         return false;
 360
 361                 I2C_SendByte(device_address & 0xFE);
 362                 if (!I2C_WaitAck())
 363                         break;
 364
 365                 I2C_SendByte(device_cmd);
 366                 if (!I2C_WaitAck())
 367                         break;
 368
 369                 I2C_SendByte(data);
 370                 if (!I2C_WaitAck())
 371                         break;
 372
 373                 bBreak = false;
 374         } while (false);
 375
 376         I2C_Stop();
 377         if (bBreak) {
 378                 if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 379                 return false;
 380         }
 381         return true;
 382 }
 383
 384 //Sends a string of data (Array, length, command to be written , SlaveDevice address  ).
 385 // len = uint8 (max buffer to write 256bytes)
 386 static bool I2C_BufferWrite(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
 387         bool bBreak = true;
 388         do {
 389                 if (!I2C_Start())
 390                         return false;
 391
 392                 I2C_SendByte(device_address & 0xFE);
 393                 if (!I2C_WaitAck())
 394                         break;
 395
 396                 I2C_SendByte(device_cmd);
 397                 if (!I2C_WaitAck())
 398                         break;
 399
 400                 while (len) {
 401
 402                         I2C_SendByte(*data);
 403                         if (!I2C_WaitAck())
 404                                 break;
 405
 406                         len--;
 407                         data++;
 408                 }
 409
 410                 if (len == 0)
 411                         bBreak = false;
 412         } while (false);
 413
 414         I2C_Stop();
 415         if (bBreak) {
 416                 if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 417                 return false;
 418         }
 419         return true;
 420 }
 421
 422 // read 1 strings of data (Data array, Readout length, command to be written , SlaveDevice address  ).
 423 // len = uint8 (max buffer to read 256bytes)
 424 static int16_t I2C_BufferRead(uint8_t *data, uint8_t len, uint8_t device_cmd, uint8_t device_address) {
 425
 426         if ( !data || len == 0 )
 427                 return 0;
 428
 429         // extra wait  500us (514us measured)
 430         // 200us  (xx measured)
 431         WaitUS(600);
 432         bool bBreak = true;
 433         uint16_t readcount = 0;
 434
 435         do {
 436                 if (!I2C_Start())
 437                         return 0;
 438
 439                 // 0xB0 / 0xC0  == i2c write
 440                 I2C_SendByte(device_address & 0xFE);
 441                 if (!I2C_WaitAck())
 442                         break;
 443
 444                 I2C_SendByte(device_cmd);
 445                 if (!I2C_WaitAck())
 446                         break;
 447
 448                 // 0xB1 / 0xC1 == i2c read
 449                 I2C_Start();
 450                 I2C_SendByte(device_address | 1);
 451                 if (!I2C_WaitAck())
 452                         break;
 453
 454                 bBreak = false;
 455         } while (false);
 456
 457         if (bBreak) {
 458                 I2C_Stop();
 459                 if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 460                 return 0;
 461         }
 462
 463         while (len) {
 464
 465                 int16_t tmp = I2C_ReadByte();
 466                 if ( tmp < 0 )
 467                         return tmp;
 468
 469                 *data = (uint8_t)tmp & 0xFF;
 470
 471                 len--;
 472
 473                 // ¶ÁÈ¡µÄµÚÒ»¸ö×Ö½ÚÎªºóÐø³¤¶È
 474                 // The first byte in response is the message length
 475                 if (!readcount && (len > *data)) {
 476                         len = *data;
 477                 } else {
 478                         data++;
 479                 }
 480                 readcount++;
 481
 482                 // acknowledgements. After last byte send NACK.
 483                 if (len == 0)
 484                         I2C_NoAck();
 485                 else
 486                         I2C_Ack();
 487         }
 488
 489         I2C_Stop();
 490
 491         // return bytecount - first byte (which is length byte)
 492         return --readcount;
 493 }
 494
 495 static int16_t I2C_ReadFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t device_address) {
 496         //START, 0xB0, 0x00, 0x00, START, 0xB1, xx, yy, zz, ......, STOP
 497         bool bBreak = true;
 498         uint8_t readcount = 0;
 499
 500         // sending
 501         do {
 502                 if (!I2C_Start())
 503                         return 0;
 504
 505                 // 0xB0 / 0xC0  i2c write
 506                 I2C_SendByte(device_address & 0xFE);
 507                 if (!I2C_WaitAck())
 508                         break;
 509
 510                 I2C_SendByte(msb);
 511                 if (!I2C_WaitAck())
 512                         break;
 513
 514                 I2C_SendByte(lsb);
 515                 if (!I2C_WaitAck())
 516                         break;
 517
 518                 // 0xB1 / 0xC1  i2c read
 519                 I2C_Start();
 520                 I2C_SendByte(device_address | 1);
 521                 if (!I2C_WaitAck())
 522                         break;
 523
 524                 bBreak = false;
 525         } while (false);
 526
 527         if (bBreak) {
 528                 I2C_Stop();
 529                 if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 530                 return 0;
 531         }
 532
 533         // reading
 534         while (len) {
 535
 536                 int16_t tmp = I2C_ReadByte();
 537                 if ( tmp < 0 )
 538                         return tmp;
 539
 540                 *data = (uint8_t)tmp & 0xFF;
 541
 542                 data++;
 543                 readcount++;
 544                 len--;
 545
 546                 // acknowledgements. After last byte send NACK.
 547                 if (len == 0)
 548                         I2C_NoAck();
 549                 else
 550                         I2C_Ack();
 551         }
 552
 553         I2C_Stop();
 554         return readcount;
 555 }
 556
 557 static bool I2C_WriteFW(uint8_t *data, uint8_t len, uint8_t msb, uint8_t lsb, uint8_t device_address) {
 558         //START, 0xB0, 0x00, 0x00, xx, yy, zz, ......, STOP
 559         bool bBreak = true;
 560
 561         do {
 562                 if (!I2C_Start())
 563                         return false;
 564
 565                 // 0xB0  == i2c write
 566                 I2C_SendByte(device_address & 0xFE);
 567                 if (!I2C_WaitAck())
 568                         break;
 569
 570                 I2C_SendByte(msb);
 571                 if (!I2C_WaitAck())
 572                         break;
 573
 574                 I2C_SendByte(lsb);
 575                 if (!I2C_WaitAck())
 576                         break;
 577
 578                 while (len) {
 579                         I2C_SendByte(*data);
 580                         if (!I2C_WaitAck())
 581                                 break;
 582
 583                         len--;
 584                         data++;
 585                 }
 586
 587                 if (len == 0)
 588                         bBreak = false;
 589         } while (false);
 590
 591         I2C_Stop();
 592         if (bBreak) {
 593                 if ( MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 594                 return false;
 595         }
 596         return true;
 597 }
 598
 599 void I2C_print_status(void) {
 600         DbpString("Smart card module (ISO 7816)");
 601         uint8_t resp[] = {0,0,0,0};
 602         I2C_Reset_EnterMainProgram();
 603         uint8_t len = I2C_BufferRead(resp, sizeof(resp), I2C_DEVICE_CMD_GETVERSION, I2C_DEVICE_ADDRESS_MAIN);
 604         if ( len > 0 )
 605                 Dbprintf("  version.................v%x.%02x", resp[0], resp[1]);
 606         else
 607                 DbpString("  version.................FAILED");
 608 }
 609
 610 // Will read response from smart card module,  retries 3 times to get the data.
 611 static bool sc_rx_bytes(uint8_t* dest, uint8_t *destlen) {
 612         uint8_t i = 3;
 613         int16_t len = 0;
 614         while (i--) {
 615
 616                 I2C_WaitForSim();
 617
 618                 len = I2C_BufferRead(dest, *destlen, I2C_DEVICE_CMD_READ, I2C_DEVICE_ADDRESS_MAIN);
 619
 620                 if ( len > 1 ){
 621                         break;
 622                 } else if ( len == 1 ) {
 623                         continue;
 624                 } else if ( len <= 0 ) {
 625                         return false;
 626                 }
 627         }
 628         // after three
 629         if ( len <= 1 )
 630                 return false;
 631
 632         *destlen = (uint8_t)len & 0xFF;
 633         return true;
 634 }
 635
 636 static bool GetATR(smart_card_atr_t *card_ptr) {
 637
 638         if ( !card_ptr ) {
 639                 return false;
 640         }
 641
 642         card_ptr->atr_len = 0;
 643         memset(card_ptr->atr, 0, sizeof(card_ptr->atr));
 644
 645         // Send ATR
 646         // start [C0 01] stop start C1 len aa bb cc stop]
 647         I2C_WriteCmd(I2C_DEVICE_CMD_GENERATE_ATR, I2C_DEVICE_ADDRESS_MAIN);
 648
 649         // wait for sim card to answer.
 650         // 1byte = 1ms, max frame 256bytes. Should wait 256ms at least just in case.
 651         if (!I2C_WaitForSim())
 652                 return false;
 653
 654         // read bytes from module
 655         uint8_t len = sizeof(card_ptr->atr);
 656         if ( !sc_rx_bytes(card_ptr->atr, &len) )
 657                 return false;
 658
 659         card_ptr->atr_len = len;
 660         LogTrace(card_ptr->atr, card_ptr->atr_len, 0, 0, NULL, false);
 661
 662         return true;
 663 }
 664
 665 void SmartCardAtr(void) {
 666         smart_card_atr_t card;
 667         LED_D_ON();
 668         clear_trace();
 669         set_tracing(true);
 670         I2C_Reset_EnterMainProgram();
 671         bool isOK = GetATR( &card );
 672         cmd_send(CMD_ACK, isOK, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
 673         set_tracing(false);
 674         LEDsoff();
 675 }
 676
 677 void SmartCardRaw( uint64_t arg0, uint64_t arg1, uint8_t *data ) {
 678
 679         LED_D_ON();
 680
 681         uint8_t len = 0;
 682         uint8_t *resp = BigBuf_malloc(ISO7618_MAX_FRAME);
 683         smartcard_command_t flags = arg0;
 684
 685         if ((flags & SC_CONNECT))
 686                 clear_trace();
 687
 688         set_tracing(true);
 689
 690         if ((flags & SC_CONNECT)) {
 691
 692                 I2C_Reset_EnterMainProgram();
 693
 694                 if ((flags & SC_SELECT)) {
 695                         smart_card_atr_t card;
 696                         bool gotATR = GetATR( &card );
 697                         //cmd_send(CMD_ACK, gotATR, sizeof(smart_card_atr_t), 0, &card, sizeof(smart_card_atr_t));
 698                         if ( !gotATR )
 699                                 goto OUT;
 700                 }
 701         }
 702
 703         if ((flags & SC_RAW) || (flags & SC_RAW_T0)) {
 704
 705                 LogTrace(data, arg1, 0, 0, NULL, true);
 706
 707                 // Send raw bytes
 708                 // asBytes = A0 A4 00 00 02
 709                 // arg1 = len 5
 710                 bool res = I2C_BufferWrite(data, arg1, ((flags & SC_RAW_T0) ? I2C_DEVICE_CMD_SEND_T0 : I2C_DEVICE_CMD_SEND), I2C_DEVICE_ADDRESS_MAIN);
 711                 if ( !res && MF_DBGLEVEL > 3 ) DbpString(I2C_ERROR);
 712
 713                 // read bytes from module
 714                 len = ISO7618_MAX_FRAME;
 715                 res = sc_rx_bytes(resp, &len);
 716                 if ( res ) {
 717                         LogTrace(resp, len, 0, 0, NULL, false);
 718                 } else {
 719                         len = 0;
 720                 }
 721         }
 722 OUT:
 723         cmd_send(CMD_ACK, len, 0, 0, resp, len);
 724         BigBuf_free();
 725         set_tracing(false);
 726         LEDsoff();
 727 }
 728
 729 void SmartCardUpgrade(uint64_t arg0) {
 730
 731         LED_C_ON();
 732
 733         #define I2C_BLOCK_SIZE 128
 734         // write.   Sector0,  with 11,22,33,44
 735         // erase is 128bytes, and takes 50ms to execute
 736
 737         I2C_Reset_EnterBootloader();
 738
 739         bool isOK = true;
 740         int16_t res = 0;
 741         uint16_t length = arg0;
 742         uint16_t pos = 0;
 743         uint8_t *fwdata = BigBuf_get_addr();
 744         uint8_t *verfiydata = BigBuf_malloc(I2C_BLOCK_SIZE);
 745
 746         while (length) {
 747
 748                 uint8_t msb = (pos >> 8) & 0xFF;
 749                 uint8_t lsb = pos & 0xFF;
 750
 751                 Dbprintf("FW %02X%02X", msb, lsb);
 752
 753                 size_t size = MIN(I2C_BLOCK_SIZE, length);
 754
 755                 // write
 756                 res = I2C_WriteFW(fwdata+pos, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
 757                 if ( !res ) {
 758                         DbpString("Writing failed");
 759                         isOK = false;
 760                         break;
 761                 }
 762
 763                 // writing takes time.
 764                 WaitMS(50);
 765
 766                 // read
 767                 res = I2C_ReadFW(verfiydata, size, msb, lsb, I2C_DEVICE_ADDRESS_BOOT);
 768                 if ( res <= 0) {
 769                         DbpString("Reading back failed");
 770                         isOK = false;
 771                         break;
 772                 }
 773
 774                 // cmp
 775                 if ( 0 != memcmp(fwdata+pos, verfiydata, size)) {
 776                         DbpString("not equal data");
 777                         isOK = false;
 778                         break;
 779                 }
 780
 781                 length -= size;
 782                 pos += size;
 783         }
 784         cmd_send(CMD_ACK, isOK, pos, 0, 0, 0);
 785         LED_C_OFF();
 786         BigBuf_free();
 787 }
 788
 789 // unfinished (or not needed?)
 790 //void SmartCardSetBaud(uint64_t arg0) {
 791 //}
 792
 793 void SmartCardSetClock(uint64_t arg0) {
 794         LED_D_ON();
 795         set_tracing(true);
 796         I2C_Reset_EnterMainProgram();
 797
 798         // Send SIM CLC
 799         // start [C0 05 xx] stop
 800         I2C_WriteByte(arg0, I2C_DEVICE_CMD_SIM_CLC, I2C_DEVICE_ADDRESS_MAIN);
 801
 802         cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
 803         set_tracing(false);
 804         LEDsoff();
 805 }
 806
 807 #endif