tmk_core/tool/mbed/mbed-sdk/libraries/USBDevice/USBDevice/USBHAL_KL25Z.cpp

   1 /* Copyright (c) 2010-2011 mbed.org, MIT License
   2 *
   3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
   4 * and associated documentation files (the "Software"), to deal in the Software without
   5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
   6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
   7 * Software is furnished to do so, subject to the following conditions:
   8 *
   9 * The above copyright notice and this permission notice shall be included in all copies or
  10 * substantial portions of the Software.
  11 *
  12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
  13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  17 */
  18
  19 #if defined(TARGET_KL25Z) | defined(TARGET_KL43Z) | defined(TARGET_KL46Z) | defined(TARGET_K20D50M) | defined(TARGET_K64F) | defined(TARGET_K22F) | defined(TARGET_TEENSY3_1)
  20
  21 #include "USBHAL.h"
  22
  23 USBHAL * USBHAL::instance;
  24
  25 static volatile int epComplete = 0;
  26
  27 // Convert physical endpoint number to register bit
  28 #define EP(endpoint) (1<<(endpoint))
  29
  30 // Convert physical to logical
  31 #define PHY_TO_LOG(endpoint)    ((endpoint)>>1)
  32
  33 // Get endpoint direction
  34 #define IN_EP(endpoint)     ((endpoint) & 1U ? true : false)
  35 #define OUT_EP(endpoint)    ((endpoint) & 1U ? false : true)
  36
  37 #define BD_OWN_MASK        (1<<7)
  38 #define BD_DATA01_MASK     (1<<6)
  39 #define BD_KEEP_MASK       (1<<5)
  40 #define BD_NINC_MASK       (1<<4)
  41 #define BD_DTS_MASK        (1<<3)
  42 #define BD_STALL_MASK      (1<<2)
  43
  44 #define TX    1
  45 #define RX    0
  46 #define ODD   0
  47 #define EVEN  1
  48 // this macro waits a physical endpoint number
  49 #define EP_BDT_IDX(ep, dir, odd) (((ep * 4) + (2 * dir) + (1 *  odd)))
  50
  51 #define SETUP_TOKEN    0x0D
  52 #define IN_TOKEN       0x09
  53 #define OUT_TOKEN      0x01
  54 #define TOK_PID(idx)   ((bdt[idx].info >> 2) & 0x0F)
  55
  56 // for each endpt: 8 bytes
  57 typedef struct BDT {
  58     uint8_t   info;       // BD[0:7]
  59     uint8_t   dummy;      // RSVD: BD[8:15]
  60     uint16_t  byte_count; // BD[16:32]
  61     uint32_t  address;    // Addr
  62 } BDT;
  63
  64
  65 // there are:
  66 //    * 16 bidirectionnal endpt -> 32 physical endpt
  67 //    * as there are ODD and EVEN buffer -> 32*2 bdt
  68 __attribute__((__aligned__(512))) BDT bdt[NUMBER_OF_PHYSICAL_ENDPOINTS * 2];
  69 uint8_t * endpoint_buffer[(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2];
  70 uint8_t * endpoint_buffer_iso[2*2];
  71
  72 static uint8_t set_addr = 0;
  73 static uint8_t addr = 0;
  74
  75 static uint32_t Data1  = 0x55555555;
  76
  77 static uint32_t frameNumber() {
  78     return((USB0->FRMNUML | (USB0->FRMNUMH << 8)) & 0x07FF);
  79 }
  80
  81 uint32_t USBHAL::endpointReadcore(uint8_t endpoint, uint8_t *buffer) {
  82     return 0;
  83 }
  84
  85 USBHAL::USBHAL(void) {
  86     // Disable IRQ
  87     NVIC_DisableIRQ(USB0_IRQn);
  88
  89 #if defined(TARGET_K64F)
  90     MPU->CESR=0;
  91 #endif
  92     // fill in callback array
  93     epCallback[0] = &USBHAL::EP1_OUT_callback;
  94     epCallback[1] = &USBHAL::EP1_IN_callback;
  95     epCallback[2] = &USBHAL::EP2_OUT_callback;
  96     epCallback[3] = &USBHAL::EP2_IN_callback;
  97     epCallback[4] = &USBHAL::EP3_OUT_callback;
  98     epCallback[5] = &USBHAL::EP3_IN_callback;
  99     epCallback[6] = &USBHAL::EP4_OUT_callback;
 100     epCallback[7] = &USBHAL::EP4_IN_callback;
 101     epCallback[8] = &USBHAL::EP5_OUT_callback;
 102     epCallback[9] = &USBHAL::EP5_IN_callback;
 103     epCallback[10] = &USBHAL::EP6_OUT_callback;
 104     epCallback[11] = &USBHAL::EP6_IN_callback;
 105     epCallback[12] = &USBHAL::EP7_OUT_callback;
 106     epCallback[13] = &USBHAL::EP7_IN_callback;
 107     epCallback[14] = &USBHAL::EP8_OUT_callback;
 108     epCallback[15] = &USBHAL::EP8_IN_callback;
 109     epCallback[16] = &USBHAL::EP9_OUT_callback;
 110     epCallback[17] = &USBHAL::EP9_IN_callback;
 111     epCallback[18] = &USBHAL::EP10_OUT_callback;
 112     epCallback[19] = &USBHAL::EP10_IN_callback;
 113     epCallback[20] = &USBHAL::EP11_OUT_callback;
 114     epCallback[21] = &USBHAL::EP11_IN_callback;
 115     epCallback[22] = &USBHAL::EP12_OUT_callback;
 116     epCallback[23] = &USBHAL::EP12_IN_callback;
 117     epCallback[24] = &USBHAL::EP13_OUT_callback;
 118     epCallback[25] = &USBHAL::EP13_IN_callback;
 119     epCallback[26] = &USBHAL::EP14_OUT_callback;
 120     epCallback[27] = &USBHAL::EP14_IN_callback;
 121     epCallback[28] = &USBHAL::EP15_OUT_callback;
 122     epCallback[29] = &USBHAL::EP15_IN_callback;
 123
 124 #if defined(TARGET_KL43Z)
 125     // enable USBFS clock
 126     SIM->SCGC4 |= SIM_SCGC4_USBFS_MASK;
 127
 128     // enable the IRC48M clock
 129     USB0->CLK_RECOVER_IRC_EN |= USB_CLK_RECOVER_IRC_EN_IRC_EN_MASK;
 130
 131     // enable the USB clock recovery tuning
 132     USB0->CLK_RECOVER_CTRL |= USB_CLK_RECOVER_CTRL_CLOCK_RECOVER_EN_MASK;
 133
 134     // choose usb src clock
 135     SIM->SOPT2 |= SIM_SOPT2_USBSRC_MASK;
 136 #else
 137     // choose usb src as PLL
 138     SIM->SOPT2 &= ~SIM_SOPT2_PLLFLLSEL_MASK;
 139     SIM->SOPT2 |= (SIM_SOPT2_USBSRC_MASK | (1 << SIM_SOPT2_PLLFLLSEL_SHIFT));
 140
 141     // enable OTG clock
 142     SIM->SCGC4 |= SIM_SCGC4_USBOTG_MASK;
 143 #endif
 144
 145     // Attach IRQ
 146     instance = this;
 147     NVIC_SetVector(USB0_IRQn, (uint32_t)&_usbisr);
 148     NVIC_EnableIRQ(USB0_IRQn);
 149
 150     // USB Module Configuration
 151     // Reset USB Module
 152     USB0->USBTRC0 |= USB_USBTRC0_USBRESET_MASK;
 153     while(USB0->USBTRC0 & USB_USBTRC0_USBRESET_MASK);
 154
 155     // Set BDT Base Register
 156     USB0->BDTPAGE1 = (uint8_t)((uint32_t)bdt>>8);
 157     USB0->BDTPAGE2 = (uint8_t)((uint32_t)bdt>>16);
 158     USB0->BDTPAGE3 = (uint8_t)((uint32_t)bdt>>24);
 159
 160     // Clear interrupt flag
 161     USB0->ISTAT = 0xff;
 162
 163     // USB Interrupt Enablers
 164     USB0->INTEN |= USB_INTEN_TOKDNEEN_MASK |
 165                    USB_INTEN_SOFTOKEN_MASK |
 166                    USB_INTEN_ERROREN_MASK  |
 167                    USB_INTEN_USBRSTEN_MASK;
 168
 169     // Disable weak pull downs
 170     USB0->USBCTRL &= ~(USB_USBCTRL_PDE_MASK | USB_USBCTRL_SUSP_MASK);
 171
 172     USB0->USBTRC0 |= 0x40;
 173 }
 174
 175 USBHAL::~USBHAL(void) { }
 176
 177 void USBHAL::connect(void) {
 178     // enable USB
 179     USB0->CTL |= USB_CTL_USBENSOFEN_MASK;
 180     // Pull up enable
 181     USB0->CONTROL |= USB_CONTROL_DPPULLUPNONOTG_MASK;
 182 }
 183
 184 void USBHAL::disconnect(void) {
 185     // disable USB
 186     USB0->CTL &= ~USB_CTL_USBENSOFEN_MASK;
 187     // Pull up disable
 188     USB0->CONTROL &= ~USB_CONTROL_DPPULLUPNONOTG_MASK;
 189
 190     //Free buffers if required:
 191     for (int i = 0; i<(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2; i++) {
 192         free(endpoint_buffer[i]);
 193         endpoint_buffer[i] = NULL;
 194     }
 195     free(endpoint_buffer_iso[2]);
 196     endpoint_buffer_iso[2] = NULL;
 197     free(endpoint_buffer_iso[0]);
 198     endpoint_buffer_iso[0] = NULL;
 199 }
 200
 201 void USBHAL::configureDevice(void) {
 202     // not needed
 203 }
 204
 205 void USBHAL::unconfigureDevice(void) {
 206     // not needed
 207 }
 208
 209 void USBHAL::setAddress(uint8_t address) {
 210     // we don't set the address now otherwise the usb controller does not ack
 211     // we set a flag instead
 212     // see usbisr when an IN token is received
 213     set_addr = 1;
 214     addr = address;
 215 }
 216
 217 bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t flags) {
 218     uint32_t handshake_flag = 0;
 219     uint8_t * buf;
 220
 221     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
 222         return false;
 223     }
 224
 225     uint32_t log_endpoint = PHY_TO_LOG(endpoint);
 226
 227     if ((flags & ISOCHRONOUS) == 0) {
 228         handshake_flag = USB_ENDPT_EPHSHK_MASK;
 229         if (IN_EP(endpoint)) {
 230             if (endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] == NULL)
 231                 endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] = (uint8_t *) malloc (64*2);
 232             buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)][0];
 233         } else {
 234             if (endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] == NULL)
 235                 endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] = (uint8_t *) malloc (64*2);
 236             buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)][0];
 237         }
 238     } else {
 239         if (IN_EP(endpoint)) {
 240             if (endpoint_buffer_iso[2] == NULL)
 241                 endpoint_buffer_iso[2] = (uint8_t *) malloc (1023*2);
 242             buf = &endpoint_buffer_iso[2][0];
 243         } else {
 244             if (endpoint_buffer_iso[0] == NULL)
 245                 endpoint_buffer_iso[0] = (uint8_t *) malloc (1023*2);
 246             buf = &endpoint_buffer_iso[0][0];
 247         }
 248     }
 249
 250     // IN endpt -> device to host (TX)
 251     if (IN_EP(endpoint)) {
 252         USB0->ENDPOINT[log_endpoint].ENDPT |= handshake_flag |        // ep handshaking (not if iso endpoint)
 253                                               USB_ENDPT_EPTXEN_MASK;  // en TX (IN) tran
 254         bdt[EP_BDT_IDX(log_endpoint, TX, ODD )].address = (uint32_t) buf;
 255         bdt[EP_BDT_IDX(log_endpoint, TX, EVEN)].address = 0;
 256     }
 257     // OUT endpt -> host to device (RX)
 258     else {
 259         USB0->ENDPOINT[log_endpoint].ENDPT |= handshake_flag |        // ep handshaking (not if iso endpoint)
 260                                               USB_ENDPT_EPRXEN_MASK;  // en RX (OUT) tran.
 261         bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].byte_count = maxPacket;
 262         bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].address    = (uint32_t) buf;
 263         bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].info       = BD_OWN_MASK | BD_DTS_MASK;
 264         bdt[EP_BDT_IDX(log_endpoint, RX, EVEN)].info       = 0;
 265     }
 266
 267     Data1 |= (1 << endpoint);
 268
 269     return true;
 270 }
 271
 272 // read setup packet
 273 void USBHAL::EP0setup(uint8_t *buffer) {
 274     uint32_t sz;
 275     endpointReadResult(EP0OUT, buffer, &sz);
 276 }
 277
 278 void USBHAL::EP0readStage(void) {
 279     Data1 &= ~1UL;  // set DATA0
 280     bdt[0].info = (BD_DTS_MASK | BD_OWN_MASK);
 281 }
 282
 283 void USBHAL::EP0read(void) {
 284     uint32_t idx = EP_BDT_IDX(PHY_TO_LOG(EP0OUT), RX, 0);
 285     bdt[idx].byte_count = MAX_PACKET_SIZE_EP0;
 286 }
 287
 288 uint32_t USBHAL::EP0getReadResult(uint8_t *buffer) {
 289     uint32_t sz;
 290     endpointReadResult(EP0OUT, buffer, &sz);
 291     return sz;
 292 }
 293
 294 void USBHAL::EP0write(uint8_t *buffer, uint32_t size) {
 295     endpointWrite(EP0IN, buffer, size);
 296 }
 297
 298 void USBHAL::EP0getWriteResult(void) {
 299 }
 300
 301 void USBHAL::EP0stall(void) {
 302     stallEndpoint(EP0OUT);
 303 }
 304
 305 EP_STATUS USBHAL::endpointRead(uint8_t endpoint, uint32_t maximumSize) {
 306     endpoint = PHY_TO_LOG(endpoint);
 307     uint32_t idx = EP_BDT_IDX(endpoint, RX, 0);
 308     bdt[idx].byte_count = maximumSize;
 309     return EP_PENDING;
 310 }
 311
 312 EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t * buffer, uint32_t *bytesRead) {
 313     uint32_t n, sz, idx, setup = 0;
 314     uint8_t not_iso;
 315     uint8_t * ep_buf;
 316
 317     uint32_t log_endpoint = PHY_TO_LOG(endpoint);
 318
 319     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
 320         return EP_INVALID;
 321     }
 322
 323     // if read on a IN endpoint -> error
 324     if (IN_EP(endpoint)) {
 325         return EP_INVALID;
 326     }
 327
 328     idx = EP_BDT_IDX(log_endpoint, RX, 0);
 329     sz  = bdt[idx].byte_count;
 330     not_iso = USB0->ENDPOINT[log_endpoint].ENDPT & USB_ENDPT_EPHSHK_MASK;
 331
 332     //for isochronous endpoint, we don't wait an interrupt
 333     if ((log_endpoint != 0) && not_iso && !(epComplete & EP(endpoint))) {
 334         return EP_PENDING;
 335     }
 336
 337     if ((log_endpoint == 0) && (TOK_PID(idx) == SETUP_TOKEN)) {
 338         setup = 1;
 339     }
 340
 341     // non iso endpoint
 342     if (not_iso) {
 343         ep_buf = endpoint_buffer[idx];
 344     } else {
 345         ep_buf = endpoint_buffer_iso[0];
 346     }
 347
 348     for (n = 0; n < sz; n++) {
 349         buffer[n] = ep_buf[n];
 350     }
 351
 352     if (((Data1 >> endpoint) & 1) == ((bdt[idx].info >> 6) & 1)) {
 353         if (setup && (buffer[6] == 0))  // if no setup data stage,
 354             Data1 &= ~1UL;              // set DATA0
 355         else
 356             Data1 ^= (1 << endpoint);
 357     }
 358
 359     if (((Data1 >> endpoint) & 1)) {
 360         bdt[idx].info = BD_DTS_MASK | BD_DATA01_MASK | BD_OWN_MASK;
 361     }
 362     else {
 363         bdt[idx].info = BD_DTS_MASK | BD_OWN_MASK;
 364     }
 365
 366     USB0->CTL &= ~USB_CTL_TXSUSPENDTOKENBUSY_MASK;
 367     *bytesRead = sz;
 368
 369     epComplete &= ~EP(endpoint);
 370     return EP_COMPLETED;
 371 }
 372
 373 EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) {
 374     uint32_t idx, n;
 375     uint8_t * ep_buf;
 376
 377     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
 378         return EP_INVALID;
 379     }
 380
 381     // if write on a OUT endpoint -> error
 382     if (OUT_EP(endpoint)) {
 383         return EP_INVALID;
 384     }
 385
 386     idx = EP_BDT_IDX(PHY_TO_LOG(endpoint), TX, 0);
 387     bdt[idx].byte_count = size;
 388
 389
 390     // non iso endpoint
 391     if (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPHSHK_MASK) {
 392         ep_buf = endpoint_buffer[idx];
 393     } else {
 394         ep_buf = endpoint_buffer_iso[2];
 395     }
 396
 397     for (n = 0; n < size; n++) {
 398         ep_buf[n] = data[n];
 399     }
 400
 401     if ((Data1 >> endpoint) & 1) {
 402         bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK;
 403     } else {
 404         bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK | BD_DATA01_MASK;
 405     }
 406
 407     Data1 ^= (1 << endpoint);
 408
 409     return EP_PENDING;
 410 }
 411
 412 EP_STATUS USBHAL::endpointWriteResult(uint8_t endpoint) {
 413     if (epComplete & EP(endpoint)) {
 414         epComplete &= ~EP(endpoint);
 415         return EP_COMPLETED;
 416     }
 417
 418     return EP_PENDING;
 419 }
 420
 421 void USBHAL::stallEndpoint(uint8_t endpoint) {
 422     USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT |= USB_ENDPT_EPSTALL_MASK;
 423 }
 424
 425 void USBHAL::unstallEndpoint(uint8_t endpoint) {
 426     USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
 427 }
 428
 429 bool USBHAL::getEndpointStallState(uint8_t endpoint) {
 430     uint8_t stall = (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPSTALL_MASK);
 431     return (stall) ? true : false;
 432 }
 433
 434 void USBHAL::remoteWakeup(void) {
 435     // [TODO]
 436 }
 437
 438
 439 void USBHAL::_usbisr(void) {
 440     instance->usbisr();
 441 }
 442
 443
 444 void USBHAL::usbisr(void) {
 445     uint8_t i;
 446     uint8_t istat = USB0->ISTAT;
 447
 448     // reset interrupt
 449     if (istat & USB_ISTAT_USBRST_MASK) {
 450         // disable all endpt
 451         for(i = 0; i < 16; i++) {
 452             USB0->ENDPOINT[i].ENDPT = 0x00;
 453         }
 454
 455         // enable control endpoint
 456         realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0, 0);
 457         realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0, 0);
 458
 459         Data1 = 0x55555555;
 460         USB0->CTL |=  USB_CTL_ODDRST_MASK;
 461
 462         USB0->ISTAT   =  0xFF;  // clear all interrupt status flags
 463         USB0->ERRSTAT =  0xFF;  // clear all error flags
 464         USB0->ERREN   =  0xFF;  // enable error interrupt sources
 465         USB0->ADDR    =  0x00;  // set default address
 466
 467         return;
 468     }
 469
 470     // resume interrupt
 471     if (istat & USB_ISTAT_RESUME_MASK) {
 472         USB0->ISTAT = USB_ISTAT_RESUME_MASK;
 473     }
 474
 475     // SOF interrupt
 476     if (istat & USB_ISTAT_SOFTOK_MASK) {
 477         USB0->ISTAT = USB_ISTAT_SOFTOK_MASK;
 478         // SOF event, read frame number
 479         SOF(frameNumber());
 480     }
 481
 482     // stall interrupt
 483     if (istat & 1<<7) {
 484         if (USB0->ENDPOINT[0].ENDPT & USB_ENDPT_EPSTALL_MASK)
 485             USB0->ENDPOINT[0].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
 486         USB0->ISTAT |= USB_ISTAT_STALL_MASK;
 487     }
 488
 489     // token interrupt
 490     if (istat & 1<<3) {
 491         uint32_t num  = (USB0->STAT >> 4) & 0x0F;
 492         uint32_t dir  = (USB0->STAT >> 3) & 0x01;
 493         uint32_t ev_odd = (USB0->STAT >> 2) & 0x01;
 494
 495         // setup packet
 496         if ((num == 0) && (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == SETUP_TOKEN)) {
 497             Data1 &= ~0x02;
 498             bdt[EP_BDT_IDX(0, TX, EVEN)].info &= ~BD_OWN_MASK;
 499             bdt[EP_BDT_IDX(0, TX, ODD)].info  &= ~BD_OWN_MASK;
 500
 501             // EP0 SETUP event (SETUP data received)
 502             EP0setupCallback();
 503
 504         } else {
 505             // OUT packet
 506             if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == OUT_TOKEN) {
 507                 if (num == 0)
 508                     EP0out();
 509                 else {
 510                     epComplete |= (1 << EP(num));
 511                     if ((instance->*(epCallback[EP(num) - 2]))()) {
 512                         epComplete &= ~(1 << EP(num));
 513                     }
 514                 }
 515             }
 516
 517             // IN packet
 518             if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == IN_TOKEN) {
 519                 if (num == 0) {
 520                     EP0in();
 521                     if (set_addr == 1) {
 522                         USB0->ADDR = addr & 0x7F;
 523                         set_addr = 0;
 524                     }
 525                 }
 526                 else {
 527                     epComplete |= (1 << (EP(num) + 1));
 528                     if ((instance->*(epCallback[EP(num) + 1 - 2]))()) {
 529                         epComplete &= ~(1 << (EP(num) + 1));
 530                     }
 531                 }
 532             }
 533         }
 534
 535         USB0->ISTAT = USB_ISTAT_TOKDNE_MASK;
 536     }
 537
 538     // sleep interrupt
 539     if (istat & 1<<4) {
 540         USB0->ISTAT |= USB_ISTAT_SLEEP_MASK;
 541     }
 542
 543     // error interrupt
 544     if (istat & USB_ISTAT_ERROR_MASK) {
 545         USB0->ERRSTAT = 0xFF;
 546         USB0->ISTAT |= USB_ISTAT_ERROR_MASK;
 547     }
 548 }
 549
 550
 551 #endif