USBHAL_KL25Z.cpp

00001 /* Copyright (c) 2010-2011 mbed.org, MIT License
00002 *
00003 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
00004 * and associated documentation files (the "Software"), to deal in the Software without
00005 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
00006 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
00007 * Software is furnished to do so, subject to the following conditions:
00008 *
00009 * The above copyright notice and this permission notice shall be included in all copies or
00010 * substantial portions of the Software.
00011 *
00012 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
00013 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00014 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
00015 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00016 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017 */
00018 
00019 #if defined(TARGET_KL25Z) | defined(TARGET_KL43Z) | defined(TARGET_KL46Z) | defined(TARGET_K20D5M) | defined(TARGET_K64F)
00020 
00021 #include "USBHAL.h"
00022 
00023 USBHAL * USBHAL::instance;
00024 
00025 static volatile int epComplete = 0;
00026 
00027 // Convert physical endpoint number to register bit
00028 #define EP(endpoint) (1<<(endpoint))
00029 
00030 // Convert physical to logical
00031 #define PHY_TO_LOG(endpoint)    ((endpoint)>>1)
00032 
00033 // Get endpoint direction
00034 #define IN_EP(endpoint)     ((endpoint) & 1U ? true : false)
00035 #define OUT_EP(endpoint)    ((endpoint) & 1U ? false : true)
00036 
00037 #define BD_OWN_MASK        (1<<7)
00038 #define BD_DATA01_MASK     (1<<6)
00039 #define BD_KEEP_MASK       (1<<5)
00040 #define BD_NINC_MASK       (1<<4)
00041 #define BD_DTS_MASK        (1<<3)
00042 #define BD_STALL_MASK      (1<<2)
00043 
00044 #define TX    1
00045 #define RX    0
00046 #define ODD   0
00047 #define EVEN  1
00048 // this macro waits a physical endpoint number
00049 #define EP_BDT_IDX(ep, dir, odd) (((ep * 4) + (2 * dir) + (1 *  odd)))
00050 
00051 #define SETUP_TOKEN    0x0D
00052 #define IN_TOKEN       0x09
00053 #define OUT_TOKEN      0x01
00054 #define TOK_PID(idx)   ((bdt[idx].info >> 2) & 0x0F)
00055 
00056 // for each endpt: 8 bytes
00057 typedef struct BDT {
00058     uint8_t   info;       // BD[0:7]
00059     uint8_t   dummy;      // RSVD: BD[8:15]
00060     uint16_t  byte_count; // BD[16:32]
00061     uint32_t  address;    // Addr
00062 } BDT;
00063 
00064 
00065 // there are:
00066 //    * 16 bidirectionnal endpt -> 32 physical endpt
00067 //    * as there are ODD and EVEN buffer -> 32*2 bdt
00068 __attribute__((__aligned__(512))) BDT bdt[NUMBER_OF_PHYSICAL_ENDPOINTS * 2];
00069 uint8_t * endpoint_buffer[(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2];
00070 uint8_t * endpoint_buffer_iso[2*2];
00071 
00072 static uint8_t set_addr = 0;
00073 static uint8_t addr = 0;
00074 
00075 static uint32_t Data1  = 0x55555555;
00076 
00077 static uint32_t frameNumber() {
00078     return((USB0->FRMNUML | (USB0->FRMNUMH << 8)) & 0x07FF);
00079 }
00080 
00081 uint32_t USBHAL::endpointReadcore(uint8_t endpoint, uint8_t *buffer) {
00082     return 0;
00083 }
00084 
00085 USBHAL::USBHAL(void) {
00086     // Disable IRQ
00087     NVIC_DisableIRQ(USB0_IRQn);
00088 
00089 #if defined(TARGET_K64F)
00090     MPU->CESR=0;
00091 #endif
00092     // fill in callback array
00093     epCallback[0] = &USBHAL::EP1_OUT_callback;
00094     epCallback[1] = &USBHAL::EP1_IN_callback;
00095     epCallback[2] = &USBHAL::EP2_OUT_callback;
00096     epCallback[3] = &USBHAL::EP2_IN_callback;
00097     epCallback[4] = &USBHAL::EP3_OUT_callback;
00098     epCallback[5] = &USBHAL::EP3_IN_callback;
00099     epCallback[6] = &USBHAL::EP4_OUT_callback;
00100     epCallback[7] = &USBHAL::EP4_IN_callback;
00101     epCallback[8] = &USBHAL::EP5_OUT_callback;
00102     epCallback[9] = &USBHAL::EP5_IN_callback;
00103     epCallback[10] = &USBHAL::EP6_OUT_callback;
00104     epCallback[11] = &USBHAL::EP6_IN_callback;
00105     epCallback[12] = &USBHAL::EP7_OUT_callback;
00106     epCallback[13] = &USBHAL::EP7_IN_callback;
00107     epCallback[14] = &USBHAL::EP8_OUT_callback;
00108     epCallback[15] = &USBHAL::EP8_IN_callback;
00109     epCallback[16] = &USBHAL::EP9_OUT_callback;
00110     epCallback[17] = &USBHAL::EP9_IN_callback;
00111     epCallback[18] = &USBHAL::EP10_OUT_callback;
00112     epCallback[19] = &USBHAL::EP10_IN_callback;
00113     epCallback[20] = &USBHAL::EP11_OUT_callback;
00114     epCallback[21] = &USBHAL::EP11_IN_callback;
00115     epCallback[22] = &USBHAL::EP12_OUT_callback;
00116     epCallback[23] = &USBHAL::EP12_IN_callback;
00117     epCallback[24] = &USBHAL::EP13_OUT_callback;
00118     epCallback[25] = &USBHAL::EP13_IN_callback;
00119     epCallback[26] = &USBHAL::EP14_OUT_callback;
00120     epCallback[27] = &USBHAL::EP14_IN_callback;
00121     epCallback[28] = &USBHAL::EP15_OUT_callback;
00122     epCallback[29] = &USBHAL::EP15_IN_callback;
00123 
00124 #if defined(TARGET_KL43Z)
00125     // enable USBFS clock
00126     SIM->SCGC4 |= SIM_SCGC4_USBFS_MASK;
00127 
00128     // enable the IRC48M clock
00129     USB0->CLK_RECOVER_IRC_EN |= USB_CLK_RECOVER_IRC_EN_IRC_EN_MASK;
00130 
00131     // enable the USB clock recovery tuning
00132     USB0->CLK_RECOVER_CTRL |= USB_CLK_RECOVER_CTRL_CLOCK_RECOVER_EN_MASK;
00133 
00134     // choose usb src clock
00135     SIM->SOPT2 |= SIM_SOPT2_USBSRC_MASK;
00136 #else
00137     // choose usb src as PLL
00138     SIM->SOPT2 |= (SIM_SOPT2_USBSRC_MASK | SIM_SOPT2_PLLFLLSEL_MASK);
00139 
00140     // enable OTG clock
00141     SIM->SCGC4 |= SIM_SCGC4_USBOTG_MASK;
00142 #endif
00143 
00144     // Attach IRQ
00145     instance = this;
00146     NVIC_SetVector(USB0_IRQn, (uint32_t)&_usbisr);
00147     NVIC_EnableIRQ(USB0_IRQn);
00148 
00149     // USB Module Configuration
00150     // Reset USB Module
00151     USB0->USBTRC0 |= USB_USBTRC0_USBRESET_MASK;
00152     while(USB0->USBTRC0 & USB_USBTRC0_USBRESET_MASK);
00153 
00154     // Set BDT Base Register
00155     USB0->BDTPAGE1 = (uint8_t)((uint32_t)bdt>>8);
00156     USB0->BDTPAGE2 = (uint8_t)((uint32_t)bdt>>16);
00157     USB0->BDTPAGE3 = (uint8_t)((uint32_t)bdt>>24);
00158 
00159     // Clear interrupt flag
00160     USB0->ISTAT = 0xff;
00161 
00162     // USB Interrupt Enablers
00163     USB0->INTEN |= USB_INTEN_TOKDNEEN_MASK |
00164                    USB_INTEN_SOFTOKEN_MASK |
00165                    USB_INTEN_ERROREN_MASK  |
00166                    USB_INTEN_USBRSTEN_MASK;
00167 
00168     // Disable weak pull downs
00169     USB0->USBCTRL &= ~(USB_USBCTRL_PDE_MASK | USB_USBCTRL_SUSP_MASK);
00170 
00171     USB0->USBTRC0 |= 0x40;
00172 }
00173 
00174 USBHAL::~USBHAL(void) { }
00175 
00176 void USBHAL::connect(void) {
00177     // enable USB
00178     USB0->CTL |= USB_CTL_USBENSOFEN_MASK;
00179     // Pull up enable
00180     USB0->CONTROL |= USB_CONTROL_DPPULLUPNONOTG_MASK;
00181 }
00182 
00183 void USBHAL::disconnect(void) {
00184     // disable USB
00185     USB0->CTL &= ~USB_CTL_USBENSOFEN_MASK;
00186     // Pull up disable
00187     USB0->CONTROL &= ~USB_CONTROL_DPPULLUPNONOTG_MASK;
00188 
00189     //Free buffers if required:
00190     for (int i = 0; i<(NUMBER_OF_PHYSICAL_ENDPOINTS - 2) * 2; i++) {
00191         free(endpoint_buffer[i]);
00192         endpoint_buffer[i] = NULL;
00193     }
00194     free(endpoint_buffer_iso[2]);
00195     endpoint_buffer_iso[2] = NULL;
00196     free(endpoint_buffer_iso[0]);
00197     endpoint_buffer_iso[0] = NULL;
00198 }
00199 
00200 void USBHAL::configureDevice(void) {
00201     // not needed
00202 }
00203 
00204 void USBHAL::unconfigureDevice(void) {
00205     // not needed
00206 }
00207 
00208 void USBHAL::setAddress(uint8_t address) {
00209     // we don't set the address now otherwise the usb controller does not ack
00210     // we set a flag instead
00211     // see usbisr when an IN token is received
00212     set_addr = 1;
00213     addr = address;
00214 }
00215 
00216 bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t flags) {
00217     uint32_t handshake_flag = 0;
00218     uint8_t * buf;
00219 
00220     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
00221         return false;
00222     }
00223 
00224     uint32_t log_endpoint = PHY_TO_LOG(endpoint);
00225 
00226     if ((flags & ISOCHRONOUS) == 0) {
00227         handshake_flag = USB_ENDPT_EPHSHK_MASK;
00228         if (IN_EP(endpoint)) {
00229             if (endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] == NULL)
00230                 endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)] = (uint8_t *) malloc (64*2);
00231             buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, TX, ODD)][0];
00232         } else {
00233             if (endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] == NULL)
00234                 endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)] = (uint8_t *) malloc (64*2);
00235             buf = &endpoint_buffer[EP_BDT_IDX(log_endpoint, RX, ODD)][0];
00236         }
00237     } else {
00238         if (IN_EP(endpoint)) {
00239             if (endpoint_buffer_iso[2] == NULL)
00240                 endpoint_buffer_iso[2] = (uint8_t *) malloc (1023*2);
00241             buf = &endpoint_buffer_iso[2][0];
00242         } else {
00243             if (endpoint_buffer_iso[0] == NULL)
00244                 endpoint_buffer_iso[0] = (uint8_t *) malloc (1023*2);
00245             buf = &endpoint_buffer_iso[0][0];
00246         }
00247     }
00248 
00249     // IN endpt -> device to host (TX)
00250     if (IN_EP(endpoint)) {
00251         USB0->ENDPOINT[log_endpoint].ENDPT |= handshake_flag |        // ep handshaking (not if iso endpoint)
00252                                               USB_ENDPT_EPTXEN_MASK;  // en TX (IN) tran
00253         bdt[EP_BDT_IDX(log_endpoint, TX, ODD )].address = (uint32_t) buf;
00254         bdt[EP_BDT_IDX(log_endpoint, TX, EVEN)].address = 0;
00255     }
00256     // OUT endpt -> host to device (RX)
00257     else {
00258         USB0->ENDPOINT[log_endpoint].ENDPT |= handshake_flag |        // ep handshaking (not if iso endpoint)
00259                                               USB_ENDPT_EPRXEN_MASK;  // en RX (OUT) tran.
00260         bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].byte_count = maxPacket;
00261         bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].address    = (uint32_t) buf;
00262         bdt[EP_BDT_IDX(log_endpoint, RX, ODD )].info       = BD_OWN_MASK | BD_DTS_MASK;
00263         bdt[EP_BDT_IDX(log_endpoint, RX, EVEN)].info       = 0;
00264     }
00265 
00266     Data1 |= (1 << endpoint);
00267 
00268     return true;
00269 }
00270 
00271 // read setup packet
00272 void USBHAL::EP0setup(uint8_t *buffer) {
00273     uint32_t sz;
00274     endpointReadResult(EP0OUT, buffer, &sz);
00275 }
00276 
00277 void USBHAL::EP0readStage(void) {
00278     Data1 &= ~1UL;  // set DATA0
00279     bdt[0].info = (BD_DTS_MASK | BD_OWN_MASK);
00280 }
00281 
00282 void USBHAL::EP0read(void) {
00283     uint32_t idx = EP_BDT_IDX(PHY_TO_LOG(EP0OUT), RX, 0);
00284     bdt[idx].byte_count = MAX_PACKET_SIZE_EP0;
00285 }
00286 
00287 uint32_t USBHAL::EP0getReadResult(uint8_t *buffer) {
00288     uint32_t sz;
00289     endpointReadResult(EP0OUT, buffer, &sz);
00290     return sz;
00291 }
00292 
00293 void USBHAL::EP0write(uint8_t *buffer, uint32_t size) {
00294     endpointWrite(EP0IN, buffer, size);
00295 }
00296 
00297 void USBHAL::EP0getWriteResult(void) {
00298 }
00299 
00300 void USBHAL::EP0stall(void) {
00301     stallEndpoint(EP0OUT);
00302 }
00303 
00304 EP_STATUS USBHAL::endpointRead(uint8_t endpoint, uint32_t maximumSize) {
00305     endpoint = PHY_TO_LOG(endpoint);
00306     uint32_t idx = EP_BDT_IDX(endpoint, RX, 0);
00307     bdt[idx].byte_count = maximumSize;
00308     return EP_PENDING;
00309 }
00310 
00311 EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t * buffer, uint32_t *bytesRead) {
00312     uint32_t n, sz, idx, setup = 0;
00313     uint8_t not_iso;
00314     uint8_t * ep_buf;
00315 
00316     uint32_t log_endpoint = PHY_TO_LOG(endpoint);
00317 
00318     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
00319         return EP_INVALID;
00320     }
00321 
00322     // if read on a IN endpoint -> error
00323     if (IN_EP(endpoint)) {
00324         return EP_INVALID;
00325     }
00326 
00327     idx = EP_BDT_IDX(log_endpoint, RX, 0);
00328     sz  = bdt[idx].byte_count;
00329     not_iso = USB0->ENDPOINT[log_endpoint].ENDPT & USB_ENDPT_EPHSHK_MASK;
00330 
00331     //for isochronous endpoint, we don't wait an interrupt
00332     if ((log_endpoint != 0) && not_iso && !(epComplete & EP(endpoint))) {
00333         return EP_PENDING;
00334     }
00335 
00336     if ((log_endpoint == 0) && (TOK_PID(idx) == SETUP_TOKEN)) {
00337         setup = 1;
00338     }
00339 
00340     // non iso endpoint
00341     if (not_iso) {
00342         ep_buf = endpoint_buffer[idx];
00343     } else {
00344         ep_buf = endpoint_buffer_iso[0];
00345     }
00346 
00347     for (n = 0; n < sz; n++) {
00348         buffer[n] = ep_buf[n];
00349     }
00350 
00351     if (((Data1 >> endpoint) & 1) == ((bdt[idx].info >> 6) & 1)) {
00352         if (setup && (buffer[6] == 0))  // if no setup data stage,
00353             Data1 &= ~1UL;              // set DATA0
00354         else
00355             Data1 ^= (1 << endpoint);
00356     }
00357 
00358     if (((Data1 >> endpoint) & 1)) {
00359         bdt[idx].info = BD_DTS_MASK | BD_DATA01_MASK | BD_OWN_MASK;
00360     }
00361     else {
00362         bdt[idx].info = BD_DTS_MASK | BD_OWN_MASK;
00363     }
00364 
00365     USB0->CTL &= ~USB_CTL_TXSUSPENDTOKENBUSY_MASK;
00366     *bytesRead = sz;
00367 
00368     epComplete &= ~EP(endpoint);
00369     return EP_COMPLETED;
00370 }
00371 
00372 EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) {
00373     uint32_t idx, n;
00374     uint8_t * ep_buf;
00375 
00376     if (endpoint > NUMBER_OF_PHYSICAL_ENDPOINTS - 1) {
00377         return EP_INVALID;
00378     }
00379 
00380     // if write on a OUT endpoint -> error
00381     if (OUT_EP(endpoint)) {
00382         return EP_INVALID;
00383     }
00384 
00385     idx = EP_BDT_IDX(PHY_TO_LOG(endpoint), TX, 0);
00386     bdt[idx].byte_count = size;
00387 
00388 
00389     // non iso endpoint
00390     if (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPHSHK_MASK) {
00391         ep_buf = endpoint_buffer[idx];
00392     } else {
00393         ep_buf = endpoint_buffer_iso[2];
00394     }
00395 
00396     for (n = 0; n < size; n++) {
00397         ep_buf[n] = data[n];
00398     }
00399 
00400     if ((Data1 >> endpoint) & 1) {
00401         bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK;
00402     } else {
00403         bdt[idx].info = BD_OWN_MASK | BD_DTS_MASK | BD_DATA01_MASK;
00404     }
00405 
00406     Data1 ^= (1 << endpoint);
00407 
00408     return EP_PENDING;
00409 }
00410 
00411 EP_STATUS USBHAL::endpointWriteResult(uint8_t endpoint) {
00412     if (epComplete & EP(endpoint)) {
00413         epComplete &= ~EP(endpoint);
00414         return EP_COMPLETED;
00415     }
00416 
00417     return EP_PENDING;
00418 }
00419 
00420 void USBHAL::stallEndpoint(uint8_t endpoint) {
00421     USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT |= USB_ENDPT_EPSTALL_MASK;
00422 }
00423 
00424 void USBHAL::unstallEndpoint(uint8_t endpoint) {
00425     USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
00426 }
00427 
00428 bool USBHAL::getEndpointStallState(uint8_t endpoint) {
00429     uint8_t stall = (USB0->ENDPOINT[PHY_TO_LOG(endpoint)].ENDPT & USB_ENDPT_EPSTALL_MASK);
00430     return (stall) ? true : false;
00431 }
00432 
00433 void USBHAL::remoteWakeup(void) {
00434     // [TODO]
00435 }
00436 
00437 
00438 void USBHAL::_usbisr(void) {
00439     instance->usbisr();
00440 }
00441 
00442 
00443 void USBHAL::usbisr(void) {
00444     uint8_t i;
00445     uint8_t istat = USB0->ISTAT;
00446 
00447     // reset interrupt
00448     if (istat & USB_ISTAT_USBRST_MASK) {
00449         // disable all endpt
00450         for(i = 0; i < 16; i++) {
00451             USB0->ENDPOINT[i].ENDPT = 0x00;
00452         }
00453 
00454         // enable control endpoint
00455         realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0, 0);
00456         realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0, 0);
00457 
00458         Data1 = 0x55555555;
00459         USB0->CTL |=  USB_CTL_ODDRST_MASK;
00460 
00461         USB0->ISTAT   =  0xFF;  // clear all interrupt status flags
00462         USB0->ERRSTAT =  0xFF;  // clear all error flags
00463         USB0->ERREN   =  0xFF;  // enable error interrupt sources
00464         USB0->ADDR    =  0x00;  // set default address
00465 
00466         return;
00467     }
00468 
00469     // resume interrupt
00470     if (istat & USB_ISTAT_RESUME_MASK) {
00471         USB0->ISTAT = USB_ISTAT_RESUME_MASK;
00472     }
00473 
00474     // SOF interrupt
00475     if (istat & USB_ISTAT_SOFTOK_MASK) {
00476         USB0->ISTAT = USB_ISTAT_SOFTOK_MASK;
00477         // SOF event, read frame number
00478         SOF(frameNumber());
00479     }
00480 
00481     // stall interrupt
00482     if (istat & 1<<7) {
00483         if (USB0->ENDPOINT[0].ENDPT & USB_ENDPT_EPSTALL_MASK)
00484             USB0->ENDPOINT[0].ENDPT &= ~USB_ENDPT_EPSTALL_MASK;
00485         USB0->ISTAT |= USB_ISTAT_STALL_MASK;
00486     }
00487 
00488     // token interrupt
00489     if (istat & 1<<3) {
00490         uint32_t num  = (USB0->STAT >> 4) & 0x0F;
00491         uint32_t dir  = (USB0->STAT >> 3) & 0x01;
00492         uint32_t ev_odd = (USB0->STAT >> 2) & 0x01;
00493 
00494         // setup packet
00495         if ((num == 0) && (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == SETUP_TOKEN)) {
00496             Data1 &= ~0x02;
00497             bdt[EP_BDT_IDX(0, TX, EVEN)].info &= ~BD_OWN_MASK;
00498             bdt[EP_BDT_IDX(0, TX, ODD)].info  &= ~BD_OWN_MASK;
00499 
00500             // EP0 SETUP event (SETUP data received)
00501             EP0setupCallback();
00502 
00503         } else {
00504             // OUT packet
00505             if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == OUT_TOKEN) {
00506                 if (num == 0)
00507                     EP0out();
00508                 else {
00509                     int phy = (num<<1) + 0;
00510                     epComplete |= EP(phy);
00511                     if ((instance->*(epCallback[phy - 2]))()) {
00512                         epComplete &= ~EP(phy);
00513                     }
00514                 }
00515             }
00516 
00517             // IN packet
00518             if (TOK_PID((EP_BDT_IDX(num, dir, ev_odd))) == IN_TOKEN) {
00519                 if (num == 0) {
00520                     EP0in();
00521                     if (set_addr == 1) {
00522                         USB0->ADDR = addr & 0x7F;
00523                         set_addr = 0;
00524                     }
00525                 }
00526                 else {
00527                     int phy = (num<<1) + 1;
00528                     epComplete |= EP(phy);
00529                     if ((instance->*(epCallback[phy - 2]))()) {
00530                         epComplete &= ~EP(phy);
00531                     }
00532                 }
00533             }
00534         }
00535 
00536         USB0->ISTAT = USB_ISTAT_TOKDNE_MASK;
00537     }
00538 
00539     // sleep interrupt
00540     if (istat & 1<<4) {
00541         USB0->ISTAT |= USB_ISTAT_SLEEP_MASK;
00542     }
00543 
00544     // error interrupt
00545     if (istat & USB_ISTAT_ERROR_MASK) {
00546         USB0->ERRSTAT = 0xFF;
00547         USB0->ISTAT |= USB_ISTAT_ERROR_MASK;
00548     }
00549 }
00550 
00551 
00552 #endif