USBHAL_LPC40.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_LPC4088)
00020 
00021 #include "USBHAL.h"
00022 
00023 
00024 // Get endpoint direction
00025 #define IN_EP(endpoint)     ((endpoint) & 1U ? true : false)
00026 #define OUT_EP(endpoint)    ((endpoint) & 1U ? false : true)
00027 
00028 // Convert physical endpoint number to register bit
00029 #define EP(endpoint) (1UL<<endpoint)
00030 
00031 // Power Control for Peripherals register
00032 #define PCUSB      (1UL<<31)
00033 
00034 // USB Clock Control register
00035 #define DEV_CLK_EN (1UL<<1)
00036 #define AHB_CLK_EN (1UL<<4)
00037 
00038 // USB Clock Status register
00039 #define DEV_CLK_ON (1UL<<1)
00040 #define AHB_CLK_ON (1UL<<4)
00041 
00042 // USB Device Interupt registers
00043 #define FRAME      (1UL<<0)
00044 #define EP_FAST    (1UL<<1)
00045 #define EP_SLOW    (1UL<<2)
00046 #define DEV_STAT   (1UL<<3)
00047 #define CCEMPTY    (1UL<<4)
00048 #define CDFULL     (1UL<<5)
00049 #define RxENDPKT   (1UL<<6)
00050 #define TxENDPKT   (1UL<<7)
00051 #define EP_RLZED   (1UL<<8)
00052 #define ERR_INT    (1UL<<9)
00053 
00054 // USB Control register
00055 #define RD_EN (1<<0)
00056 #define WR_EN (1<<1)
00057 #define LOG_ENDPOINT(endpoint) ((endpoint>>1)<<2)
00058 
00059 // USB Receive Packet Length register
00060 #define DV      (1UL<<10)
00061 #define PKT_RDY (1UL<<11)
00062 #define PKT_LNGTH_MASK (0x3ff)
00063 
00064 // Serial Interface Engine (SIE)
00065 #define SIE_WRITE   (0x01)
00066 #define SIE_READ    (0x02)
00067 #define SIE_COMMAND (0x05)
00068 #define SIE_CMD_CODE(phase, data) ((phase<<8)|(data<<16))
00069 
00070 // SIE Command codes
00071 #define SIE_CMD_SET_ADDRESS        (0xD0)
00072 #define SIE_CMD_CONFIGURE_DEVICE   (0xD8)
00073 #define SIE_CMD_SET_MODE           (0xF3)
00074 #define SIE_CMD_READ_FRAME_NUMBER  (0xF5)
00075 #define SIE_CMD_READ_TEST_REGISTER (0xFD)
00076 #define SIE_CMD_SET_DEVICE_STATUS  (0xFE)
00077 #define SIE_CMD_GET_DEVICE_STATUS  (0xFE)
00078 #define SIE_CMD_GET_ERROR_CODE     (0xFF)
00079 #define SIE_CMD_READ_ERROR_STATUS  (0xFB)
00080 
00081 #define SIE_CMD_SELECT_ENDPOINT(endpoint)                 (0x00+endpoint)
00082 #define SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint) (0x40+endpoint)
00083 #define SIE_CMD_SET_ENDPOINT_STATUS(endpoint)             (0x40+endpoint)
00084 
00085 #define SIE_CMD_CLEAR_BUFFER    (0xF2)
00086 #define SIE_CMD_VALIDATE_BUFFER (0xFA)
00087 
00088 // SIE Device Status register
00089 #define SIE_DS_CON    (1<<0)
00090 #define SIE_DS_CON_CH (1<<1)
00091 #define SIE_DS_SUS    (1<<2)
00092 #define SIE_DS_SUS_CH (1<<3)
00093 #define SIE_DS_RST    (1<<4)
00094 
00095 // SIE Device Set Address register
00096 #define SIE_DSA_DEV_EN  (1<<7)
00097 
00098 // SIE Configue Device register
00099 #define SIE_CONF_DEVICE (1<<0)
00100 
00101 // Select Endpoint register
00102 #define SIE_SE_FE       (1<<0)
00103 #define SIE_SE_ST       (1<<1)
00104 #define SIE_SE_STP      (1<<2)
00105 #define SIE_SE_PO       (1<<3)
00106 #define SIE_SE_EPN      (1<<4)
00107 #define SIE_SE_B_1_FULL (1<<5)
00108 #define SIE_SE_B_2_FULL (1<<6)
00109 
00110 // Set Endpoint Status command
00111 #define SIE_SES_ST      (1<<0)
00112 #define SIE_SES_DA      (1<<5)
00113 #define SIE_SES_RF_MO   (1<<6)
00114 #define SIE_SES_CND_ST  (1<<7)
00115 
00116 
00117 USBHAL * USBHAL::instance;
00118 
00119 static volatile int epComplete;
00120 static uint32_t endpointStallState;
00121 
00122 static void SIECommand(uint32_t command) {
00123     // The command phase of a SIE transaction
00124     LPC_USB->DevIntClr = CCEMPTY;
00125     LPC_USB->CmdCode = SIE_CMD_CODE(SIE_COMMAND, command);
00126     while (!(LPC_USB->DevIntSt & CCEMPTY));
00127 }
00128 
00129 static void SIEWriteData(uint8_t data) {
00130     // The data write phase of a SIE transaction
00131     LPC_USB->DevIntClr = CCEMPTY;
00132     LPC_USB->CmdCode = SIE_CMD_CODE(SIE_WRITE, data);
00133     while (!(LPC_USB->DevIntSt & CCEMPTY));
00134 }
00135 
00136 static uint8_t SIEReadData(uint32_t command) {
00137     // The data read phase of a SIE transaction
00138     LPC_USB->DevIntClr = CDFULL;
00139     LPC_USB->CmdCode = SIE_CMD_CODE(SIE_READ, command);
00140     while (!(LPC_USB->DevIntSt & CDFULL));
00141     return (uint8_t)LPC_USB->CmdData;
00142 }
00143 
00144 static void SIEsetDeviceStatus(uint8_t status) {
00145     // Write SIE device status register
00146     SIECommand(SIE_CMD_SET_DEVICE_STATUS);
00147     SIEWriteData(status);
00148 }
00149 
00150 static uint8_t SIEgetDeviceStatus(void) {
00151     // Read SIE device status register
00152     SIECommand(SIE_CMD_GET_DEVICE_STATUS);
00153     return SIEReadData(SIE_CMD_GET_DEVICE_STATUS);
00154 }
00155 
00156 void SIEsetAddress(uint8_t address) {
00157     // Write SIE device address register
00158     SIECommand(SIE_CMD_SET_ADDRESS);
00159     SIEWriteData((address & 0x7f) | SIE_DSA_DEV_EN);
00160 }
00161 
00162 static uint8_t SIEselectEndpoint(uint8_t endpoint) {
00163     // SIE select endpoint command
00164     SIECommand(SIE_CMD_SELECT_ENDPOINT(endpoint));
00165     return SIEReadData(SIE_CMD_SELECT_ENDPOINT(endpoint));
00166 }
00167 
00168 static uint8_t SIEclearBuffer(void) {
00169     // SIE clear buffer command
00170     SIECommand(SIE_CMD_CLEAR_BUFFER);
00171     return SIEReadData(SIE_CMD_CLEAR_BUFFER);
00172 }
00173 
00174 static void SIEvalidateBuffer(void) {
00175     // SIE validate buffer command
00176     SIECommand(SIE_CMD_VALIDATE_BUFFER);
00177 }
00178 
00179 static void SIEsetEndpointStatus(uint8_t endpoint, uint8_t status) {
00180     // SIE set endpoint status command
00181     SIECommand(SIE_CMD_SET_ENDPOINT_STATUS(endpoint));
00182     SIEWriteData(status);
00183 }
00184 
00185 static uint16_t SIEgetFrameNumber(void) __attribute__ ((unused));
00186 static uint16_t SIEgetFrameNumber(void) {
00187     // Read current frame number
00188     uint16_t lowByte;
00189     uint16_t highByte;
00190 
00191     SIECommand(SIE_CMD_READ_FRAME_NUMBER);
00192     lowByte = SIEReadData(SIE_CMD_READ_FRAME_NUMBER);
00193     highByte = SIEReadData(SIE_CMD_READ_FRAME_NUMBER);
00194 
00195     return (highByte << 8) | lowByte;
00196 }
00197 
00198 static void SIEconfigureDevice(void) {
00199     // SIE Configure device command
00200     SIECommand(SIE_CMD_CONFIGURE_DEVICE);
00201     SIEWriteData(SIE_CONF_DEVICE);
00202 }
00203 
00204 static void SIEunconfigureDevice(void) {
00205     // SIE Configure device command
00206     SIECommand(SIE_CMD_CONFIGURE_DEVICE);
00207     SIEWriteData(0);
00208 }
00209 
00210 static void SIEconnect(void) {
00211     // Connect USB device
00212     uint8_t status = SIEgetDeviceStatus();
00213     SIEsetDeviceStatus(status | SIE_DS_CON);
00214 }
00215 
00216 
00217 static void SIEdisconnect(void) {
00218     // Disconnect USB device
00219     uint8_t status = SIEgetDeviceStatus();
00220     SIEsetDeviceStatus(status & ~SIE_DS_CON);
00221 }
00222 
00223 
00224 static uint8_t selectEndpointClearInterrupt(uint8_t endpoint) {
00225     // Implemented using using EP_INT_CLR.
00226     LPC_USB->EpIntClr = EP(endpoint);
00227     while (!(LPC_USB->DevIntSt & CDFULL));
00228     return (uint8_t)LPC_USB->CmdData;
00229 }
00230 
00231 
00232 static void enableEndpointEvent(uint8_t endpoint) {
00233     // Enable an endpoint interrupt
00234     LPC_USB->EpIntEn |= EP(endpoint);
00235 }
00236 
00237 static void disableEndpointEvent(uint8_t endpoint) __attribute__ ((unused));
00238 static void disableEndpointEvent(uint8_t endpoint) {
00239     // Disable an endpoint interrupt
00240     LPC_USB->EpIntEn &= ~EP(endpoint);
00241 }
00242 
00243 static volatile uint32_t __attribute__((used)) dummyRead;
00244 uint32_t USBHAL::endpointReadcore(uint8_t endpoint, uint8_t *buffer) {
00245     // Read from an OUT endpoint
00246     uint32_t size;
00247     uint32_t i;
00248     uint32_t data = 0;
00249     uint8_t offset;
00250 
00251     LPC_USB->Ctrl = LOG_ENDPOINT(endpoint) | RD_EN;
00252     while (!(LPC_USB->RxPLen & PKT_RDY));
00253 
00254     size = LPC_USB->RxPLen & PKT_LNGTH_MASK;
00255 
00256     offset = 0;
00257 
00258     if (size > 0) {
00259         for (i=0; i<size; i++) {
00260             if (offset==0) {
00261                 // Fetch up to four bytes of data as a word
00262                 data = LPC_USB->RxData;
00263             }
00264 
00265             // extract a byte
00266             *buffer = (data>>offset) & 0xff;
00267             buffer++;
00268 
00269             // move on to the next byte
00270             offset = (offset + 8) % 32;
00271         }
00272     } else {
00273         dummyRead = LPC_USB->RxData;
00274     }
00275 
00276     LPC_USB->Ctrl = 0;
00277 
00278     if ((endpoint >> 1) % 3 || (endpoint >> 1) == 0) {
00279         SIEselectEndpoint(endpoint);
00280         SIEclearBuffer();
00281     }
00282     
00283     return size;
00284 }
00285 
00286 static void endpointWritecore(uint8_t endpoint, uint8_t *buffer, uint32_t size) {
00287     // Write to an IN endpoint
00288     uint32_t temp, data;
00289     uint8_t offset;
00290 
00291     LPC_USB->Ctrl = LOG_ENDPOINT(endpoint) | WR_EN;
00292 
00293     LPC_USB->TxPLen = size;
00294     offset = 0;
00295     data = 0;
00296 
00297     if (size>0) {
00298         do {
00299             // Fetch next data byte into a word-sized temporary variable
00300             temp = *buffer++;
00301 
00302             // Add to current data word
00303             temp = temp << offset;
00304             data = data | temp;
00305 
00306             // move on to the next byte
00307             offset = (offset + 8) % 32;
00308             size--;
00309 
00310             if ((offset==0) || (size==0)) {
00311                 // Write the word to the endpoint
00312                 LPC_USB->TxData = data;
00313                 data = 0;
00314             }
00315         } while (size>0);
00316     } else {
00317         LPC_USB->TxData = 0;
00318     }
00319 
00320     // Clear WR_EN to cover zero length packet case
00321     LPC_USB->Ctrl=0;
00322 
00323     SIEselectEndpoint(endpoint);
00324     SIEvalidateBuffer();
00325 }
00326 
00327 USBHAL::USBHAL(void) {
00328     // Disable IRQ
00329     NVIC_DisableIRQ(USB_IRQn);
00330     
00331     // fill in callback array
00332     epCallback[0] = &USBHAL::EP1_OUT_callback;
00333     epCallback[1] = &USBHAL::EP1_IN_callback;
00334     epCallback[2] = &USBHAL::EP2_OUT_callback;
00335     epCallback[3] = &USBHAL::EP2_IN_callback;
00336     epCallback[4] = &USBHAL::EP3_OUT_callback;
00337     epCallback[5] = &USBHAL::EP3_IN_callback;
00338     epCallback[6] = &USBHAL::EP4_OUT_callback;
00339     epCallback[7] = &USBHAL::EP4_IN_callback;
00340     epCallback[8] = &USBHAL::EP5_OUT_callback;
00341     epCallback[9] = &USBHAL::EP5_IN_callback;
00342     epCallback[10] = &USBHAL::EP6_OUT_callback;
00343     epCallback[11] = &USBHAL::EP6_IN_callback;
00344     epCallback[12] = &USBHAL::EP7_OUT_callback;
00345     epCallback[13] = &USBHAL::EP7_IN_callback;
00346     epCallback[14] = &USBHAL::EP8_OUT_callback;
00347     epCallback[15] = &USBHAL::EP8_IN_callback;
00348     epCallback[16] = &USBHAL::EP9_OUT_callback;
00349     epCallback[17] = &USBHAL::EP9_IN_callback;
00350     epCallback[18] = &USBHAL::EP10_OUT_callback;
00351     epCallback[19] = &USBHAL::EP10_IN_callback;
00352     epCallback[20] = &USBHAL::EP11_OUT_callback;
00353     epCallback[21] = &USBHAL::EP11_IN_callback;
00354     epCallback[22] = &USBHAL::EP12_OUT_callback;
00355     epCallback[23] = &USBHAL::EP12_IN_callback;
00356     epCallback[24] = &USBHAL::EP13_OUT_callback;
00357     epCallback[25] = &USBHAL::EP13_IN_callback;
00358     epCallback[26] = &USBHAL::EP14_OUT_callback;
00359     epCallback[27] = &USBHAL::EP14_IN_callback;
00360     epCallback[28] = &USBHAL::EP15_OUT_callback;
00361     epCallback[29] = &USBHAL::EP15_IN_callback;
00362 
00363     // Enable power to USB device controller
00364     LPC_SC->PCONP |= PCUSB;
00365 
00366     // Enable USB clocks
00367     LPC_USB->USBClkCtrl |= DEV_CLK_EN | AHB_CLK_EN;
00368     while ((LPC_USB->USBClkSt & (DEV_CLK_EN | AHB_CLK_EN)) != (DEV_CLK_ON | AHB_CLK_ON));
00369 
00370     // Configure pins P0.29 and P0.30 to be USB D+ and USB D-
00371     LPC_IOCON->P0_29 &= ~0x07;
00372     LPC_IOCON->P0_29 |= 0x01;
00373     LPC_IOCON->P0_30 &= ~0x07;
00374     LPC_IOCON->P0_30 |= 0x01;    
00375     
00376     // Disconnect USB device
00377     SIEdisconnect();
00378 
00379     // Configure pin P2.9 to be Connect
00380     LPC_IOCON->P2_9 &= ~0x07;
00381     LPC_IOCON->P2_9 |= 0x01;    
00382 
00383     // Connect must be low for at least 2.5uS
00384     wait(0.3);
00385 
00386     // Set the maximum packet size for the control endpoints
00387     realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0, 0);
00388     realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0, 0);
00389 
00390     // Attach IRQ
00391     instance = this;
00392     NVIC_SetVector(USB_IRQn, (uint32_t)&_usbisr);
00393 
00394     // Enable interrupts for device events and EP0
00395     LPC_USB->DevIntEn = EP_SLOW | DEV_STAT | FRAME;
00396     enableEndpointEvent(EP0IN);
00397     enableEndpointEvent(EP0OUT);
00398 }
00399 
00400 USBHAL::~USBHAL(void) {
00401     // Ensure device disconnected
00402     SIEdisconnect();
00403     // Disable USB interrupts
00404     NVIC_DisableIRQ(USB_IRQn);
00405 }
00406 
00407 void USBHAL::connect(void) {
00408     NVIC_EnableIRQ(USB_IRQn);
00409     // Connect USB device
00410     SIEconnect();
00411 }
00412 
00413 void USBHAL::disconnect(void) {
00414     NVIC_DisableIRQ(USB_IRQn);
00415     // Disconnect USB device
00416     SIEdisconnect();
00417 }
00418 
00419 void USBHAL::configureDevice(void) {
00420     SIEconfigureDevice();
00421 }
00422 
00423 void USBHAL::unconfigureDevice(void) {
00424     SIEunconfigureDevice();
00425 }
00426 
00427 void USBHAL::setAddress(uint8_t address) {
00428     SIEsetAddress(address);
00429 }
00430 
00431 void USBHAL::EP0setup(uint8_t *buffer) {
00432     endpointReadcore(EP0OUT, buffer);
00433 }
00434 
00435 void USBHAL::EP0read(void) {
00436     // Not required
00437 }
00438 
00439 void USBHAL::EP0readStage(void) {
00440     // Not required
00441 }
00442 
00443 uint32_t USBHAL::EP0getReadResult(uint8_t *buffer) {
00444     return endpointReadcore(EP0OUT, buffer);
00445 }
00446 
00447 void USBHAL::EP0write(uint8_t *buffer, uint32_t size) {
00448     endpointWritecore(EP0IN, buffer, size);
00449 }
00450 
00451 void USBHAL::EP0getWriteResult(void) {
00452     // Not required
00453 }
00454 
00455 void USBHAL::EP0stall(void) {
00456     // This will stall both control endpoints
00457     stallEndpoint(EP0OUT);
00458 }
00459 
00460 EP_STATUS USBHAL::endpointRead(uint8_t endpoint, uint32_t maximumSize) {
00461     return EP_PENDING;
00462 }
00463 
00464 EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t * buffer, uint32_t *bytesRead) {
00465 
00466     //for isochronous endpoint, we don't wait an interrupt
00467     if ((endpoint >> 1) % 3 || (endpoint >> 1) == 0) {
00468         if (!(epComplete & EP(endpoint)))
00469             return EP_PENDING;
00470     }
00471     
00472     *bytesRead = endpointReadcore(endpoint, buffer);
00473     epComplete &= ~EP(endpoint);
00474     return EP_COMPLETED;
00475 }
00476 
00477 EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) {
00478     if (getEndpointStallState(endpoint)) {
00479         return EP_STALLED;
00480     }
00481 
00482     epComplete &= ~EP(endpoint);
00483 
00484     endpointWritecore(endpoint, data, size);
00485     return EP_PENDING;
00486 }
00487 
00488 EP_STATUS USBHAL::endpointWriteResult(uint8_t endpoint) {
00489     if (epComplete & EP(endpoint)) {
00490         epComplete &= ~EP(endpoint);
00491         return EP_COMPLETED;
00492     }
00493 
00494     return EP_PENDING;
00495 }
00496 
00497 bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t flags) {
00498     // Realise an endpoint
00499     LPC_USB->DevIntClr = EP_RLZED;
00500     LPC_USB->ReEp |= EP(endpoint);
00501     LPC_USB->EpInd = endpoint;
00502     LPC_USB->MaxPSize = maxPacket;
00503 
00504     while (!(LPC_USB->DevIntSt & EP_RLZED));
00505     LPC_USB->DevIntClr = EP_RLZED;
00506 
00507     // Clear stall state
00508     endpointStallState &= ~EP(endpoint);
00509 
00510     enableEndpointEvent(endpoint);
00511     return true;
00512 }
00513 
00514 void USBHAL::stallEndpoint(uint8_t endpoint) {
00515     // Stall an endpoint
00516     if ( (endpoint==EP0IN) || (endpoint==EP0OUT) ) {
00517         // Conditionally stall both control endpoints
00518         SIEsetEndpointStatus(EP0OUT, SIE_SES_CND_ST);
00519     } else {
00520         SIEsetEndpointStatus(endpoint, SIE_SES_ST);
00521 
00522         // Update stall state
00523         endpointStallState |= EP(endpoint);
00524     }
00525 }
00526 
00527 void USBHAL::unstallEndpoint(uint8_t endpoint) {
00528     // Unstall an endpoint. The endpoint will also be reinitialised
00529     SIEsetEndpointStatus(endpoint, 0);
00530 
00531     // Update stall state
00532     endpointStallState &= ~EP(endpoint);
00533 }
00534 
00535 bool USBHAL::getEndpointStallState(uint8_t endpoint) {
00536     // Returns true if endpoint stalled
00537     return endpointStallState & EP(endpoint);
00538 }
00539 
00540 void USBHAL::remoteWakeup(void) {
00541     // Remote wakeup
00542     uint8_t status;
00543 
00544     // Enable USB clocks
00545     LPC_USB->USBClkCtrl |= DEV_CLK_EN | AHB_CLK_EN;
00546     while (LPC_USB->USBClkSt != (DEV_CLK_ON | AHB_CLK_ON));
00547 
00548     status = SIEgetDeviceStatus();
00549     SIEsetDeviceStatus(status & ~SIE_DS_SUS);
00550 }
00551 
00552 void USBHAL::_usbisr(void) {
00553     instance->usbisr();
00554 }
00555 
00556 
00557 void USBHAL::usbisr(void) {
00558     uint8_t devStat;
00559 
00560     if (LPC_USB->DevIntSt & FRAME) {
00561         // Start of frame event
00562         SOF(SIEgetFrameNumber());
00563         // Clear interrupt status flag
00564         LPC_USB->DevIntClr = FRAME;
00565     }
00566 
00567     if (LPC_USB->DevIntSt & DEV_STAT) {
00568         // Device Status interrupt
00569         // Must clear the interrupt status flag before reading the device status from the SIE
00570         LPC_USB->DevIntClr = DEV_STAT;
00571 
00572         // Read device status from SIE
00573         devStat = SIEgetDeviceStatus();
00574         //printf("devStat: %d\r\n", devStat);
00575 
00576         if (devStat & SIE_DS_SUS_CH) {
00577             // Suspend status changed
00578             if((devStat & SIE_DS_SUS) != 0) {
00579                 suspendStateChanged(0);
00580             }
00581         }
00582 
00583         if (devStat & SIE_DS_RST) {
00584             // Bus reset
00585             if((devStat & SIE_DS_SUS) == 0) {
00586                 suspendStateChanged(1);
00587             }
00588             busReset();
00589         }
00590     }
00591 
00592     if (LPC_USB->DevIntSt & EP_SLOW) {
00593         // (Slow) Endpoint Interrupt
00594 
00595         // Process each endpoint interrupt
00596         if (LPC_USB->EpIntSt & EP(EP0OUT)) {
00597             if (selectEndpointClearInterrupt(EP0OUT) & SIE_SE_STP) {
00598                 // this is a setup packet
00599                 EP0setupCallback();
00600             } else {
00601                 EP0out();
00602             }
00603             LPC_USB->DevIntClr = EP_SLOW;
00604         }
00605 
00606         if (LPC_USB->EpIntSt & EP(EP0IN)) {
00607             selectEndpointClearInterrupt(EP0IN);
00608             LPC_USB->DevIntClr = EP_SLOW;
00609             EP0in();
00610         }
00611         
00612         for (uint8_t num = 2; num < 16*2; num++) {
00613             if (LPC_USB->EpIntSt & EP(num)) {
00614                 selectEndpointClearInterrupt(num);
00615                 epComplete |= EP(num);
00616                 LPC_USB->DevIntClr = EP_SLOW;
00617                 if ((instance->*(epCallback[num - 2]))()) {
00618                     epComplete &= ~EP(num);
00619                 }
00620             }
00621         }
00622     }
00623 }
00624 
00625 #endif