Diff: USBDevice/USBHAL_LPC11U.cpp

Revision:

71:53949e6131f6

Parent:

70:2c525a50f1b6

--- a/USBDevice/USBHAL_LPC11U.cpp	Thu Jul 20 10:14:36 2017 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,738 +0,0 @@
-/* Copyright (c) 2010-2011 mbed.org, MIT License
-*
-* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
-* and associated documentation files (the "Software"), to deal in the Software without
-* restriction, including without limitation the rights to use, copy, modify, merge, publish,
-* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
-* Software is furnished to do so, subject to the following conditions:
-*
-* The above copyright notice and this permission notice shall be included in all copies or
-* substantial portions of the Software.
-*
-* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
-* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-*/
-
-#if defined(TARGET_LPC11UXX) || defined(TARGET_LPC11U6X) || defined(TARGET_LPC1347) || defined(TARGET_LPC1549)
-
-#if defined(TARGET_LPC1347) || defined(TARGET_LPC1549)
-#define USB_IRQ USB_IRQ_IRQn
-#else
-#define USB_IRQ USB_IRQn
-#endif
-
-#include "USBHAL.h"
-
-USBHAL * USBHAL::instance;
-#if defined(TARGET_LPC1549)
-static uint8_t usbmem[2048] __attribute__((aligned(2048)));
-#endif
-
-// Valid physical endpoint numbers are 0 to (NUMBER_OF_PHYSICAL_ENDPOINTS-1)
-#define LAST_PHYSICAL_ENDPOINT (NUMBER_OF_PHYSICAL_ENDPOINTS-1)
-
-// Convert physical endpoint number to register bit
-#define EP(endpoint) (1UL<<endpoint)
-
-// Convert physical to logical
-#define PHY_TO_LOG(endpoint)    ((endpoint)>>1)
-
-// Get endpoint direction
-#define IN_EP(endpoint)     ((endpoint) & 1U ? true : false)
-#define OUT_EP(endpoint)    ((endpoint) & 1U ? false : true)
-
-// USB RAM
-#if defined(TARGET_LPC1549)
-#define USB_RAM_START ((uint32_t)usbmem)
-#define USB_RAM_SIZE  sizeof(usbmem)
-#else
-#define USB_RAM_START (0x20004000)
-#define USB_RAM_SIZE  (0x00000800)
-#endif
-
-// SYSAHBCLKCTRL
-#if defined(TARGET_LPC1549)
-#define CLK_USB     (1UL<<23)
-#else
-#define CLK_USB     (1UL<<14)
-#define CLK_USBRAM  (1UL<<27)
-#endif
-
-// USB Information register
-#define FRAME_NR(a)     ((a) & 0x7ff)   // Frame number
-
-// USB Device Command/Status register
-#define DEV_ADDR_MASK   (0x7f)          // Device address
-#define DEV_ADDR(a)     ((a) & DEV_ADDR_MASK)
-#define DEV_EN          (1UL<<7)        // Device enable
-#define SETUP           (1UL<<8)        // SETUP token received
-#define PLL_ON          (1UL<<9)        // PLL enabled in suspend
-#define DCON            (1UL<<16)       // Device status - connect
-#define DSUS            (1UL<<17)       // Device status - suspend
-#define DCON_C          (1UL<<24)       // Connect change
-#define DSUS_C          (1UL<<25)       // Suspend change
-#define DRES_C          (1UL<<26)       // Reset change
-#define VBUSDEBOUNCED   (1UL<<28)       // Vbus detected
-
-// Endpoint Command/Status list
-#define CMDSTS_A                 (1UL<<31)          // Active
-#define CMDSTS_D                 (1UL<<30)          // Disable
-#define CMDSTS_S                 (1UL<<29)          // Stall
-#define CMDSTS_TR                (1UL<<28)          // Toggle Reset
-#define CMDSTS_RF                (1UL<<27)          // Rate Feedback mode
-#define CMDSTS_TV                (1UL<<27)          // Toggle Value
-#define CMDSTS_T                 (1UL<<26)          // Endpoint Type
-#define CMDSTS_NBYTES(n)         (((n)&0x3ff)<<16)  // Number of bytes
-#define CMDSTS_ADDRESS_OFFSET(a) (((a)>>6)&0xffff)  // Buffer start address
-
-#define BYTES_REMAINING(s)       (((s)>>16)&0x3ff)  // Bytes remaining after transfer
-
-// USB Non-endpoint interrupt sources
-#define FRAME_INT   (1UL<<30)
-#define DEV_INT     (1UL<<31)
-
-static volatile int epComplete = 0;
-
-// One entry for a double-buffered logical endpoint in the endpoint
-// command/status list. Endpoint 0 is single buffered, out[1] is used
-// for the SETUP packet and in[1] is not used
-typedef struct {
-    uint32_t out[2];
-    uint32_t in[2];
-} PACKED EP_COMMAND_STATUS;
-
-typedef struct {
-    uint8_t out[MAX_PACKET_SIZE_EP0];
-    uint8_t in[MAX_PACKET_SIZE_EP0];
-    uint8_t setup[SETUP_PACKET_SIZE];
-} PACKED CONTROL_TRANSFER;
-
-typedef struct {
-    uint32_t    maxPacket;
-    uint32_t    buffer[2];
-    uint32_t    options;
-} PACKED EP_STATE;
-
-static volatile EP_STATE endpointState[NUMBER_OF_PHYSICAL_ENDPOINTS];
-
-// Pointer to the endpoint command/status list
-static EP_COMMAND_STATUS *ep = NULL;
-
-// Pointer to endpoint 0 data (IN/OUT and SETUP)
-static CONTROL_TRANSFER *ct = NULL;
-
-// Shadow DEVCMDSTAT register to avoid accidentally clearing flags or
-// initiating a remote wakeup event.
-static volatile uint32_t devCmdStat;
-
-// Pointers used to allocate USB RAM
-static uint32_t usbRamPtr = USB_RAM_START;
-static uint32_t epRamPtr = 0; // Buffers for endpoints > 0 start here
-
-#define ROUND_UP_TO_MULTIPLE(x, m) ((((x)+((m)-1))/(m))*(m))
-
-void USBMemCopy(uint8_t *dst, uint8_t *src, uint32_t size);
-void USBMemCopy(uint8_t *dst, uint8_t *src, uint32_t size) {
-    if (size > 0) {
-        do {
-            *dst++ = *src++;
-        } while (--size > 0);
-    }
-}
-
-
-USBHAL::USBHAL(void) {
-    NVIC_DisableIRQ(USB_IRQ);
-
-    // fill in callback array
-    epCallback[0] = &USBHAL::EP1_OUT_callback;
-    epCallback[1] = &USBHAL::EP1_IN_callback;
-    epCallback[2] = &USBHAL::EP2_OUT_callback;
-    epCallback[3] = &USBHAL::EP2_IN_callback;
-    epCallback[4] = &USBHAL::EP3_OUT_callback;
-    epCallback[5] = &USBHAL::EP3_IN_callback;
-    epCallback[6] = &USBHAL::EP4_OUT_callback;
-    epCallback[7] = &USBHAL::EP4_IN_callback;
-
-#if defined(TARGET_LPC1549)
-    /* Set USB PLL input to system oscillator */
-    LPC_SYSCON->USBPLLCLKSEL = 0x01;
-
-    /* Setup USB PLL  (FCLKIN = 12MHz) * 4 = 48MHz
-       MSEL = 3 (this is pre-decremented), PSEL = 1 (for P = 2)
-       FCLKOUT = FCLKIN * (MSEL + 1) = 12MHz * 4 = 48MHz
-       FCCO = FCLKOUT * 2 * P = 48MHz * 2 * 2 = 192MHz (within FCCO range) */
-    LPC_SYSCON->USBPLLCTRL = (0x3 | (1UL << 6));
-
-    /* Powerup USB PLL */
-    LPC_SYSCON->PDRUNCFG &= ~(CLK_USB);
-
-    /* Wait for PLL to lock */
-    while(!(LPC_SYSCON->USBPLLSTAT & 0x01));
-
-    /* enable USB main clock */
-    LPC_SYSCON->USBCLKSEL = 0x02;
-    LPC_SYSCON->USBCLKDIV = 1;
-
-    /* Enable AHB clock to the USB block. */
-    LPC_SYSCON->SYSAHBCLKCTRL1 |= CLK_USB;
-
-    /* power UP USB Phy */
-    LPC_SYSCON->PDRUNCFG &= ~(1UL << 9);
-
-    /* Reset USB block */
-    LPC_SYSCON->PRESETCTRL1 |= (CLK_USB);
-    LPC_SYSCON->PRESETCTRL1 &= ~(CLK_USB);
-
-#else
-    #if defined(TARGET_LPC11U35_401) || defined(TARGET_LPC11U35_501)
-    // USB_VBUS input with pull-down
-    LPC_IOCON->PIO0_3 = 0x00000009;
-    #endif
-
-    // nUSB_CONNECT output
-    LPC_IOCON->PIO0_6 = 0x00000001;
-
-    // Enable clocks (USB registers, USB RAM)
-    LPC_SYSCON->SYSAHBCLKCTRL |= CLK_USB | CLK_USBRAM;
-
-    // Ensure device disconnected (DCON not set)
-    LPC_USB->DEVCMDSTAT = 0;
-#endif
-    // to ensure that the USB host sees the device as
-    // disconnected if the target CPU is reset.
-    wait(0.3);
-
-    // Reserve space in USB RAM for endpoint command/status list
-    // Must be 256 byte aligned
-    usbRamPtr = ROUND_UP_TO_MULTIPLE(usbRamPtr, 256);
-    ep = (EP_COMMAND_STATUS *)usbRamPtr;
-    usbRamPtr += (sizeof(EP_COMMAND_STATUS) * NUMBER_OF_LOGICAL_ENDPOINTS);
-    LPC_USB->EPLISTSTART = (uint32_t)(ep) & 0xffffff00;
-
-    // Reserve space in USB RAM for Endpoint 0
-    // Must be 64 byte aligned
-    usbRamPtr = ROUND_UP_TO_MULTIPLE(usbRamPtr, 64);
-    ct = (CONTROL_TRANSFER *)usbRamPtr;
-    usbRamPtr += sizeof(CONTROL_TRANSFER);
-    LPC_USB->DATABUFSTART =(uint32_t)(ct) & 0xffc00000;
-
-    // Setup command/status list for EP0
-    ep[0].out[0] = 0;
-    ep[0].in[0] =  0;
-    ep[0].out[1] = CMDSTS_ADDRESS_OFFSET((uint32_t)ct->setup);
-
-    // Route all interrupts to IRQ, some can be routed to
-    // USB_FIQ if you wish.
-    LPC_USB->INTROUTING = 0;
-
-    // Set device address 0, enable USB device, no remote wakeup
-    devCmdStat = DEV_ADDR(0) | DEV_EN | DSUS;
-    LPC_USB->DEVCMDSTAT = devCmdStat;
-
-    // Enable interrupts for device events and EP0
-    LPC_USB->INTEN = DEV_INT | EP(EP0IN) | EP(EP0OUT) | FRAME_INT;
-    instance = this;
-
-    //attach IRQ handler and enable interrupts
-    NVIC_SetVector(USB_IRQ, (uint32_t)&_usbisr);
-}
-
-USBHAL::~USBHAL(void) {
-    // Ensure device disconnected (DCON not set)
-    LPC_USB->DEVCMDSTAT = 0;
-    // Disable USB interrupts
-    NVIC_DisableIRQ(USB_IRQ);
-}
-
-void USBHAL::connect(void) {
-    NVIC_EnableIRQ(USB_IRQ);
-    devCmdStat |= DCON;
-    LPC_USB->DEVCMDSTAT = devCmdStat;
-}
-
-void USBHAL::disconnect(void) {
-    NVIC_DisableIRQ(USB_IRQ);
-    devCmdStat &= ~DCON;
-    LPC_USB->DEVCMDSTAT = devCmdStat;
-}
-
-void USBHAL::configureDevice(void) {
-    // Not required
-}
-
-void USBHAL::unconfigureDevice(void) {
-    // Not required
-}
-
-void USBHAL::EP0setup(uint8_t *buffer) {
-    // Copy setup packet data
-    USBMemCopy(buffer, ct->setup, SETUP_PACKET_SIZE);
-}
-
-void USBHAL::EP0read(void) {
-    // Start an endpoint 0 read
-
-    // The USB ISR will call USBDevice_EP0out() when a packet has been read,
-    // the USBDevice layer then calls USBBusInterface_EP0getReadResult() to
-    // read the data.
-
-    ep[0].out[0] = CMDSTS_A |CMDSTS_NBYTES(MAX_PACKET_SIZE_EP0) \
-                   | CMDSTS_ADDRESS_OFFSET((uint32_t)ct->out);
-}
-
-uint32_t USBHAL::EP0getReadResult(uint8_t *buffer) {
-    // Complete an endpoint 0 read
-    uint32_t bytesRead;
-
-    // Find how many bytes were read
-    bytesRead = MAX_PACKET_SIZE_EP0 - BYTES_REMAINING(ep[0].out[0]);
-
-    // Copy data
-    USBMemCopy(buffer, ct->out, bytesRead);
-    return bytesRead;
-}
-
-
-void USBHAL::EP0readStage(void) {
-    // Not required
-}
-
-void USBHAL::EP0write(uint8_t *buffer, uint32_t size) {
-    // Start and endpoint 0 write
-
-    // The USB ISR will call USBDevice_EP0in() when the data has
-    // been written, the USBDevice layer then calls
-    // USBBusInterface_EP0getWriteResult() to complete the transaction.
-
-    // Copy data
-    USBMemCopy(ct->in, buffer, size);
-
-    // Start transfer
-    ep[0].in[0] = CMDSTS_A | CMDSTS_NBYTES(size) \
-                  | CMDSTS_ADDRESS_OFFSET((uint32_t)ct->in);
-}
-
-
-EP_STATUS USBHAL::endpointRead(uint8_t endpoint, uint32_t maximumSize) {
-    uint8_t bf = 0;
-    uint32_t flags = 0;
-
-    //check which buffer must be filled
-    if (LPC_USB->EPBUFCFG & EP(endpoint)) {
-        // Double buffered
-        if (LPC_USB->EPINUSE & EP(endpoint)) {
-            bf = 1;
-        } else {
-            bf = 0;
-        }
-    }
-
-    // if isochronous endpoint, T = 1
-    if(endpointState[endpoint].options & ISOCHRONOUS)
-    {
-        flags |= CMDSTS_T;
-    }
-
-    //Active the endpoint for reading
-    ep[PHY_TO_LOG(endpoint)].out[bf] = CMDSTS_A | CMDSTS_NBYTES(maximumSize) \
-                                       | CMDSTS_ADDRESS_OFFSET((uint32_t)ct->out) | flags;
-    return EP_PENDING;
-}
-
-EP_STATUS USBHAL::endpointReadResult(uint8_t endpoint, uint8_t *data, uint32_t *bytesRead) {
-
-    uint8_t bf = 0;
-
-    if (!(epComplete & EP(endpoint)))
-        return EP_PENDING;
-    else {
-        epComplete &= ~EP(endpoint);
-
-        //check which buffer has been filled
-        if (LPC_USB->EPBUFCFG & EP(endpoint)) {
-            // Double buffered (here we read the previous buffer which was used)
-            if (LPC_USB->EPINUSE & EP(endpoint)) {
-                bf = 0;
-            } else {
-                bf = 1;
-            }
-        }
-
-        // Find how many bytes were read
-        *bytesRead = (uint32_t) (endpointState[endpoint].maxPacket - BYTES_REMAINING(ep[PHY_TO_LOG(endpoint)].out[bf]));
-
-        // Copy data
-        USBMemCopy(data, ct->out, *bytesRead);
-        return EP_COMPLETED;
-    }
-}
-
-void USBHAL::EP0getWriteResult(void) {
-    // Not required
-}
-
-void USBHAL::EP0stall(void) {
-    ep[0].in[0] = CMDSTS_S;
-    ep[0].out[0] = CMDSTS_S;
-}
-
-void USBHAL::setAddress(uint8_t address) {
-    devCmdStat &= ~DEV_ADDR_MASK;
-    devCmdStat |= DEV_ADDR(address);
-    LPC_USB->DEVCMDSTAT = devCmdStat;
-}
-
-EP_STATUS USBHAL::endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) {
-    uint32_t flags = 0;
-    uint32_t bf;
-
-    // Validate parameters
-    if (data == NULL) {
-        return EP_INVALID;
-    }
-
-    if (endpoint > LAST_PHYSICAL_ENDPOINT) {
-        return EP_INVALID;
-    }
-
-    if ((endpoint==EP0IN) || (endpoint==EP0OUT)) {
-        return EP_INVALID;
-    }
-
-    if (size > endpointState[endpoint].maxPacket) {
-        return EP_INVALID;
-    }
-
-    if (LPC_USB->EPBUFCFG & EP(endpoint)) {
-        // Double buffered
-        if (LPC_USB->EPINUSE & EP(endpoint)) {
-            bf = 1;
-        } else {
-            bf = 0;
-        }
-    } else {
-        // Single buffered
-        bf = 0;
-    }
-
-    // Check if already active
-    if (ep[PHY_TO_LOG(endpoint)].in[bf] & CMDSTS_A) {
-        return EP_INVALID;
-    }
-
-    // Check if stalled
-    if (ep[PHY_TO_LOG(endpoint)].in[bf] & CMDSTS_S) {
-        return EP_STALLED;
-    }
-
-    // Copy data to USB RAM
-    USBMemCopy((uint8_t *)endpointState[endpoint].buffer[bf], data, size);
-
-    // Add options
-    if (endpointState[endpoint].options & RATE_FEEDBACK_MODE) {
-        flags |= CMDSTS_RF;
-    }
-
-    if (endpointState[endpoint].options & ISOCHRONOUS) {
-        flags |= CMDSTS_T;
-    }
-
-    // Add transfer
-    ep[PHY_TO_LOG(endpoint)].in[bf] = CMDSTS_ADDRESS_OFFSET( \
-                                      endpointState[endpoint].buffer[bf]) \
-                                      | CMDSTS_NBYTES(size) | CMDSTS_A | flags;
-
-    return EP_PENDING;
-}
-
-EP_STATUS USBHAL::endpointWriteResult(uint8_t endpoint) {
-    uint32_t bf;
-
-    // Validate parameters
-    if (endpoint > LAST_PHYSICAL_ENDPOINT) {
-        return EP_INVALID;
-    }
-
-    if (OUT_EP(endpoint)) {
-        return EP_INVALID;
-    }
-
-    if (LPC_USB->EPBUFCFG & EP(endpoint)) {
-        // Double buffered     // TODO: FIX THIS
-        if (LPC_USB->EPINUSE & EP(endpoint)) {
-            bf = 1;
-        } else {
-            bf = 0;
-        }
-    } else {
-        // Single buffered
-        bf = 0;
-    }
-
-    // Check if endpoint still active
-    if (ep[PHY_TO_LOG(endpoint)].in[bf] & CMDSTS_A) {
-        return EP_PENDING;
-    }
-
-    // Check if stalled
-    if (ep[PHY_TO_LOG(endpoint)].in[bf] & CMDSTS_S) {
-        return EP_STALLED;
-    }
-
-    return EP_COMPLETED;
-}
-
-void USBHAL::stallEndpoint(uint8_t endpoint) {
-
-    // FIX: should this clear active bit?
-    if (IN_EP(endpoint)) {
-        ep[PHY_TO_LOG(endpoint)].in[0] |= CMDSTS_S;
-        ep[PHY_TO_LOG(endpoint)].in[1] |= CMDSTS_S;
-    } else {
-        ep[PHY_TO_LOG(endpoint)].out[0] |= CMDSTS_S;
-        ep[PHY_TO_LOG(endpoint)].out[1] |= CMDSTS_S;
-    }
-}
-
-void USBHAL::unstallEndpoint(uint8_t endpoint) {
-    if (LPC_USB->EPBUFCFG & EP(endpoint)) {
-        // Double buffered
-        if (IN_EP(endpoint)) {
-            ep[PHY_TO_LOG(endpoint)].in[0] = 0; // S = 0
-            ep[PHY_TO_LOG(endpoint)].in[1] = 0; // S = 0
-
-            if (LPC_USB->EPINUSE & EP(endpoint)) {
-                ep[PHY_TO_LOG(endpoint)].in[1] = CMDSTS_TR; // S = 0, TR = 1, TV = 0
-            } else {
-                ep[PHY_TO_LOG(endpoint)].in[0] = CMDSTS_TR; // S = 0, TR = 1, TV = 0
-            }
-        } else {
-            ep[PHY_TO_LOG(endpoint)].out[0] = 0; // S = 0
-            ep[PHY_TO_LOG(endpoint)].out[1] = 0; // S = 0
-
-            if (LPC_USB->EPINUSE & EP(endpoint)) {
-                ep[PHY_TO_LOG(endpoint)].out[1] = CMDSTS_TR; // S = 0, TR = 1, TV = 0
-            } else {
-                ep[PHY_TO_LOG(endpoint)].out[0] = CMDSTS_TR; // S = 0, TR = 1, TV = 0
-            }
-        }
-    } else {
-        // Single buffered
-        if (IN_EP(endpoint)) {
-            ep[PHY_TO_LOG(endpoint)].in[0] = CMDSTS_TR;     // S = 0, TR = 1, TV = 0
-        } else {
-            ep[PHY_TO_LOG(endpoint)].out[0] = CMDSTS_TR;    // S = 0, TR = 1, TV = 0
-        }
-    }
-}
-
-bool USBHAL::getEndpointStallState(unsigned char endpoint) {
-    if (IN_EP(endpoint)) {
-        if (LPC_USB->EPINUSE & EP(endpoint)) {
-            if (ep[PHY_TO_LOG(endpoint)].in[1] & CMDSTS_S) {
-                return true;
-            }
-        } else {
-            if (ep[PHY_TO_LOG(endpoint)].in[0] & CMDSTS_S) {
-                return true;
-            }
-        }
-    } else {
-        if (LPC_USB->EPINUSE & EP(endpoint)) {
-            if (ep[PHY_TO_LOG(endpoint)].out[1] & CMDSTS_S) {
-                return true;
-            }
-        } else {
-            if (ep[PHY_TO_LOG(endpoint)].out[0] & CMDSTS_S) {
-                return true;
-            }
-        }
-    }
-
-    return false;
-}
-
-bool USBHAL::realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t options) {
-    uint32_t tmpEpRamPtr;
-
-    if (endpoint > LAST_PHYSICAL_ENDPOINT) {
-        return false;
-    }
-
-    // Not applicable to the control endpoints
-    if ((endpoint==EP0IN) || (endpoint==EP0OUT)) {
-        return false;
-    }
-
-    // Allocate buffers in USB RAM
-    tmpEpRamPtr = epRamPtr;
-
-    // Must be 64 byte aligned
-    tmpEpRamPtr = ROUND_UP_TO_MULTIPLE(tmpEpRamPtr, 64);
-
-    if ((tmpEpRamPtr + maxPacket) > (USB_RAM_START + USB_RAM_SIZE)) {
-        // Out of memory
-        return false;
-    }
-
-    // Allocate first buffer
-    endpointState[endpoint].buffer[0] = tmpEpRamPtr;
-    tmpEpRamPtr += maxPacket;
-
-    if (!(options & SINGLE_BUFFERED)) {
-        // Must be 64 byte aligned
-        tmpEpRamPtr = ROUND_UP_TO_MULTIPLE(tmpEpRamPtr, 64);
-
-        if ((tmpEpRamPtr + maxPacket) > (USB_RAM_START + USB_RAM_SIZE)) {
-            // Out of memory
-            return false;
-        }
-
-        // Allocate second buffer
-        endpointState[endpoint].buffer[1] = tmpEpRamPtr;
-        tmpEpRamPtr += maxPacket;
-    }
-
-    // Commit to this USB RAM allocation
-    epRamPtr = tmpEpRamPtr;
-
-    // Remaining endpoint state values
-    endpointState[endpoint].maxPacket = maxPacket;
-    endpointState[endpoint].options = options;
-
-    // Enable double buffering if required
-    if (options & SINGLE_BUFFERED) {
-        LPC_USB->EPBUFCFG &= ~EP(endpoint);
-    } else {
-        // Double buffered
-        LPC_USB->EPBUFCFG |= EP(endpoint);
-    }
-
-    // Enable interrupt
-    LPC_USB->INTEN |= EP(endpoint);
-
-    // Enable endpoint
-    unstallEndpoint(endpoint);
-    return true;
-}
-
-void USBHAL::remoteWakeup(void) {
-    // Clearing DSUS bit initiates a remote wakeup if the
-    // device is currently enabled and suspended - otherwise
-    // it has no effect.
-    LPC_USB->DEVCMDSTAT = devCmdStat & ~DSUS;
-}
-
-
-static void disableEndpoints(void) {
-    uint32_t logEp;
-
-    // Ref. Table 158 "When a bus reset is received, software
-    // must set the disable bit of all endpoints to 1".
-
-    for (logEp = 1; logEp < NUMBER_OF_LOGICAL_ENDPOINTS; logEp++) {
-        ep[logEp].out[0] = CMDSTS_D;
-        ep[logEp].out[1] = CMDSTS_D;
-        ep[logEp].in[0] =  CMDSTS_D;
-        ep[logEp].in[1] =  CMDSTS_D;
-    }
-
-    // Start of USB RAM for endpoints > 0
-    epRamPtr = usbRamPtr;
-}
-
-
-
-void USBHAL::_usbisr(void) {
-    instance->usbisr();
-}
-
-void USBHAL::usbisr(void) {
-    // Start of frame
-    if (LPC_USB->INTSTAT & FRAME_INT) {
-        // Clear SOF interrupt
-        LPC_USB->INTSTAT = FRAME_INT;
-
-        // SOF event, read frame number
-        SOF(FRAME_NR(LPC_USB->INFO));
-    }
-
-    // Device state
-    if (LPC_USB->INTSTAT & DEV_INT) {
-        LPC_USB->INTSTAT = DEV_INT;
-
-        if (LPC_USB->DEVCMDSTAT & DSUS_C) {
-            // Suspend status changed
-            LPC_USB->DEVCMDSTAT = devCmdStat | DSUS_C;
-            if (LPC_USB->DEVCMDSTAT & DSUS) {
-                suspendStateChanged(1);
-            } else {
-                suspendStateChanged(0);
-            }
-        }
-
-        if (LPC_USB->DEVCMDSTAT & DRES_C) {
-            // Bus reset
-            LPC_USB->DEVCMDSTAT = devCmdStat | DRES_C;
-
-            // Disable endpoints > 0
-            disableEndpoints();
-
-            // Bus reset event
-            busReset();
-        }
-    }
-
-    // Endpoint 0
-    if (LPC_USB->INTSTAT & EP(EP0OUT)) {
-        // Clear EP0OUT/SETUP interrupt
-        LPC_USB->INTSTAT = EP(EP0OUT);
-
-        // Check if SETUP
-        if (LPC_USB->DEVCMDSTAT & SETUP) {
-            // Clear Active and Stall bits for EP0
-            // Documentation does not make it clear if we must use the
-            // EPSKIP register to achieve this, Fig. 16 and NXP reference
-            // code suggests we can just clear the Active bits - check with
-            // NXP to be sure.
-            ep[0].in[0] = 0;
-            ep[0].out[0] = 0;
-
-            // Clear EP0IN interrupt
-            LPC_USB->INTSTAT = EP(EP0IN);
-
-            // Clear SETUP (and INTONNAK_CI/O) in device status register
-            LPC_USB->DEVCMDSTAT = devCmdStat | SETUP;
-
-            // EP0 SETUP event (SETUP data received)
-            EP0setupCallback();
-        } else {
-            // EP0OUT ACK event (OUT data received)
-            EP0out();
-        }
-    }
-
-    if (LPC_USB->INTSTAT & EP(EP0IN)) {
-        // Clear EP0IN interrupt
-        LPC_USB->INTSTAT = EP(EP0IN);
-
-        // EP0IN ACK event (IN data sent)
-        EP0in();
-    }
-
-    for (uint8_t num = 2; num < 5*2; num++) {
-        if (LPC_USB->INTSTAT & EP(num)) {
-            LPC_USB->INTSTAT = EP(num);
-            epComplete |= EP(num);
-            if ((instance->*(epCallback[num - 2]))()) {
-                epComplete &= ~EP(num);
-            }
-        }
-    }
-}
-
-#endif