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This package contains a simple test of tests for various elements of the SmartBoard hardware, which is a simple baseboard designed for easy embedding. It is able to run both a semi-automatic test suite as well as allow interactive testing.
Dependencies: EthernetNetIf NTPClient_NetServices mbed
This program is most of what you need to test your SmartBoard baseboard hardware. It provides a means to test the following:
- Two channels of CAN (with a loopback cable)
- RS-232 Ports
- Analog inputs
- PWM outputs
- Ethernet port
- Real time clock
- micro SD
- USB Host port
Diff: USBHostLite/usbhost_lpc17xx.c
- Revision:
- 4:ca93a8d4874d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHostLite/usbhost_lpc17xx.c Thu Mar 31 11:22:00 2011 +0000 @@ -0,0 +1,840 @@ +/* +************************************************************************************************************** +* NXP USB Host Stack +* +* (c) Copyright 2008, NXP SemiConductors +* (c) Copyright 2008, OnChip Technologies LLC +* All Rights Reserved +* +* www.nxp.com +* www.onchiptech.com +* +* File : usbhost_lpc17xx.c +* Programmer(s) : Ravikanth.P +* Version : +* +************************************************************************************************************** +*/ + +/* +************************************************************************************************************** +* INCLUDE HEADER FILES +************************************************************************************************************** +*/ + +#include "usbhost_lpc17xx.h" + +// Added DEBUG_X to eliminate annoying print statements +// Copyright (c) 2011, David Smart + +// define for additional details +//#define DEBUG_X + +/* +************************************************************************************************************** +* GLOBAL VARIABLES +************************************************************************************************************** +*/ +int gUSBConnected; + +volatile USB_INT32U HOST_RhscIntr = 0; /* Root Hub Status Change interrupt */ +volatile USB_INT32U HOST_WdhIntr = 0; /* Semaphore to wait until the TD is submitted */ +volatile USB_INT08U HOST_TDControlStatus = 0; +volatile HCED *EDCtrl; /* Control endpoint descriptor structure */ +volatile HCED *EDBulkIn; /* BulkIn endpoint descriptor structure */ +volatile HCED *EDBulkOut; /* BulkOut endpoint descriptor structure */ +volatile HCTD *TDHead; /* Head transfer descriptor structure */ +volatile HCTD *TDTail; /* Tail transfer descriptor structure */ +volatile HCCA *Hcca; /* Host Controller Communications Area structure */ + USB_INT16U *TDBufNonVol; /* Identical to TDBuffer just to reduce compiler warnings */ +volatile USB_INT08U *TDBuffer; /* Current Buffer Pointer of transfer descriptor */ + +// USB host structures +// AHB SRAM block 1 +#define HOSTBASEADDR 0x2007C000 +// reserve memory for the linker +static USB_INT08U HostBuf[0x200] __attribute__((at(HOSTBASEADDR))); +/* +************************************************************************************************************** +* DELAY IN MILLI SECONDS +* +* Description: This function provides a delay in milli seconds +* +* Arguments : delay The delay required +* +* Returns : None +* +************************************************************************************************************** +*/ + +void Host_DelayMS (USB_INT32U delay) +{ + volatile USB_INT32U i; + + + for (i = 0; i < delay; i++) { + Host_DelayUS(1000); + } +} + +/* +************************************************************************************************************** +* DELAY IN MICRO SECONDS +* +* Description: This function provides a delay in micro seconds +* +* Arguments : delay The delay required +* +* Returns : None +* +************************************************************************************************************** +*/ + +void Host_DelayUS (USB_INT32U delay) +{ + volatile USB_INT32U i; + + + for (i = 0; i < (4 * delay); i++) { /* This logic was tested. It gives app. 1 micro sec delay */ + ; + } +} + +// bits of the USB/OTG clock control register +#define HOST_CLK_EN (1<<0) +#define DEV_CLK_EN (1<<1) +#define PORTSEL_CLK_EN (1<<3) +#define AHB_CLK_EN (1<<4) + +// bits of the USB/OTG clock status register +#define HOST_CLK_ON (1<<0) +#define DEV_CLK_ON (1<<1) +#define PORTSEL_CLK_ON (1<<3) +#define AHB_CLK_ON (1<<4) + +// we need host clock, OTG/portsel clock and AHB clock +#define CLOCK_MASK (HOST_CLK_EN | PORTSEL_CLK_EN | AHB_CLK_EN) + +/* +************************************************************************************************************** +* INITIALIZE THE HOST CONTROLLER +* +* Description: This function initializes lpc17xx host controller +* +* Arguments : None +* +* Returns : +* +************************************************************************************************************** +*/ +void Host_Init (void) +{ + #ifdef DEBUG_X + PRINT_Log("In Host_Init\n"); + #endif + NVIC_DisableIRQ(USB_IRQn); /* Disable the USB interrupt source */ + + // turn on power for USB + LPC_SC->PCONP |= (1UL<<31); + // Enable USB host clock, port selection and AHB clock + LPC_USB->USBClkCtrl |= CLOCK_MASK; + // Wait for clocks to become available + while ((LPC_USB->USBClkSt & CLOCK_MASK) != CLOCK_MASK) + ; + + // it seems the bits[0:1] mean the following + // 0: U1=device, U2=host + // 1: U1=host, U2=host + // 2: reserved + // 3: U1=host, U2=device + // NB: this register is only available if OTG clock (aka "port select") is enabled!! + // since we don't care about port 2, set just bit 0 to 1 (U1=host) + LPC_USB->OTGStCtrl |= 1; + + // now that we've configured the ports, we can turn off the portsel clock + LPC_USB->USBClkCtrl &= ~PORTSEL_CLK_EN; + + // power pins are not connected on mbed, so we can skip them + /* P1[18] = USB_UP_LED, 01 */ + /* P1[19] = /USB_PPWR, 10 */ + /* P1[22] = USB_PWRD, 10 */ + /* P1[27] = /USB_OVRCR, 10 */ + /*LPC_PINCON->PINSEL3 &= ~((3<<4) | (3<<6) | (3<<12) | (3<<22)); + LPC_PINCON->PINSEL3 |= ((1<<4)|(2<<6) | (2<<12) | (2<<22)); // 0x00802080 + */ + + // configure USB D+/D- pins + /* P0[29] = USB_D+, 01 */ + /* P0[30] = USB_D-, 01 */ + LPC_PINCON->PINSEL1 &= ~((3<<26) | (3<<28)); + LPC_PINCON->PINSEL1 |= ((1<<26)|(1<<28)); // 0x14000000 + + #ifdef DEBUG_X + PRINT_Log("Initializing Host Stack\n"); + #endif + + Hcca = (volatile HCCA *)(HostBuf+0x000); + TDHead = (volatile HCTD *)(HostBuf+0x100); + TDTail = (volatile HCTD *)(HostBuf+0x110); + EDCtrl = (volatile HCED *)(HostBuf+0x120); + EDBulkIn = (volatile HCED *)(HostBuf+0x130); + EDBulkOut = (volatile HCED *)(HostBuf+0x140); + TDBuffer = (volatile USB_INT08U *)(HostBuf+0x150); + + /* Initialize all the TDs, EDs and HCCA to 0 */ + Host_EDInit(EDCtrl); + Host_EDInit(EDBulkIn); + Host_EDInit(EDBulkOut); + Host_TDInit(TDHead); + Host_TDInit(TDTail); + Host_HCCAInit(Hcca); + + Host_DelayMS(50); /* Wait 50 ms before apply reset */ + LPC_USB->HcControl = 0; /* HARDWARE RESET */ + LPC_USB->HcControlHeadED = 0; /* Initialize Control list head to Zero */ + LPC_USB->HcBulkHeadED = 0; /* Initialize Bulk list head to Zero */ + + /* SOFTWARE RESET */ + LPC_USB->HcCommandStatus = OR_CMD_STATUS_HCR; + LPC_USB->HcFmInterval = DEFAULT_FMINTERVAL; /* Write Fm Interval and Largest Data Packet Counter */ + + /* Put HC in operational state */ + LPC_USB->HcControl = (LPC_USB->HcControl & (~OR_CONTROL_HCFS)) | OR_CONTROL_HC_OPER; + LPC_USB->HcRhStatus = OR_RH_STATUS_LPSC; /* Set Global Power */ + + LPC_USB->HcHCCA = (USB_INT32U)Hcca; + LPC_USB->HcInterruptStatus |= LPC_USB->HcInterruptStatus; /* Clear Interrrupt Status */ + + + LPC_USB->HcInterruptEnable = OR_INTR_ENABLE_MIE | + OR_INTR_ENABLE_WDH | + OR_INTR_ENABLE_RHSC; + + NVIC_SetPriority(USB_IRQn, 0); /* highest priority */ + /* Enable the USB Interrupt */ + NVIC_EnableIRQ(USB_IRQn); + #ifdef DEBUG_X + PRINT_Log("Host Initialized\n"); + #endif +} + +/* +************************************************************************************************************** +* INTERRUPT SERVICE ROUTINE +* +* Description: This function services the interrupt caused by host controller +* +* Arguments : None +* +* Returns : None +* +************************************************************************************************************** +*/ + +void USB_IRQHandler (void) __irq +{ + USB_INT32U int_status; + USB_INT32U ie_status; + + int_status = LPC_USB->HcInterruptStatus; /* Read Interrupt Status */ + ie_status = LPC_USB->HcInterruptEnable; /* Read Interrupt enable status */ + + if (!(int_status & ie_status)) { + return; + } else { + + int_status = int_status & ie_status; + if (int_status & OR_INTR_STATUS_RHSC) { /* Root hub status change interrupt */ + if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_CSC) { + if (LPC_USB->HcRhStatus & OR_RH_STATUS_DRWE) { + /* + * When DRWE is on, Connect Status Change + * means a remote wakeup event. + */ + HOST_RhscIntr = 1;// JUST SOMETHING FOR A BREAKPOINT + } + else { + /* + * When DRWE is off, Connect Status Change + * is NOT a remote wakeup event + */ + if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_CCS) { + if (!gUSBConnected) { + HOST_TDControlStatus = 0; + HOST_WdhIntr = 0; + HOST_RhscIntr = 1; + gUSBConnected = 1; + } + else { + #ifdef DEBUG_X + PRINT_Log("Spurious status change (connected)?\n"); + #endif + } + } else { + if (gUSBConnected) { + LPC_USB->HcInterruptEnable = 0; // why do we get multiple disc. rupts??? + HOST_RhscIntr = 0; + gUSBConnected = 0; + } + else { + #ifdef DEBUG_X + PRINT_Log("Spurious status change (disconnected)?\n"); + #endif + } + } + } + LPC_USB->HcRhPortStatus1 = OR_RH_PORT_CSC; + } + if (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_PRSC) { + LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRSC; + } + } + if (int_status & OR_INTR_STATUS_WDH) { /* Writeback Done Head interrupt */ + HOST_WdhIntr = 1; + HOST_TDControlStatus = (TDHead->Control >> 28) & 0xf; + } + LPC_USB->HcInterruptStatus = int_status; /* Clear interrupt status register */ + } + return; +} + +/* +************************************************************************************************************** +* PROCESS TRANSFER DESCRIPTOR +* +* Description: This function processes the transfer descriptor +* +* Arguments : ed Endpoint descriptor that contains this transfer descriptor +* token SETUP, IN, OUT +* buffer Current Buffer Pointer of the transfer descriptor +* buffer_len Length of the buffer +* +* Returns : OK if TD submission is successful +* ERROR if TD submission fails +* +************************************************************************************************************** +*/ + +USB_INT32S Host_ProcessTD (volatile HCED *ed, + volatile USB_INT32U token, + volatile USB_INT08U *buffer, + USB_INT32U buffer_len) +{ + volatile USB_INT32U td_toggle; + + + if (ed == EDCtrl) { + if (token == TD_SETUP) { + td_toggle = TD_TOGGLE_0; + } else { + td_toggle = TD_TOGGLE_1; + } + } else { + td_toggle = 0; + } + TDHead->Control = (TD_ROUNDING | + token | + TD_DELAY_INT(0) | + td_toggle | + TD_CC); + TDTail->Control = 0; + TDHead->CurrBufPtr = (USB_INT32U) buffer; + TDTail->CurrBufPtr = 0; + TDHead->Next = (USB_INT32U) TDTail; + TDTail->Next = 0; + TDHead->BufEnd = (USB_INT32U)(buffer + (buffer_len - 1)); + TDTail->BufEnd = 0; + + ed->HeadTd = (USB_INT32U)TDHead | ((ed->HeadTd) & 0x00000002); + ed->TailTd = (USB_INT32U)TDTail; + ed->Next = 0; + + if (ed == EDCtrl) { + LPC_USB->HcControlHeadED = (USB_INT32U)ed; + LPC_USB->HcCommandStatus = LPC_USB->HcCommandStatus | OR_CMD_STATUS_CLF; + LPC_USB->HcControl = LPC_USB->HcControl | OR_CONTROL_CLE; + } else { + LPC_USB->HcBulkHeadED = (USB_INT32U)ed; + LPC_USB->HcCommandStatus = LPC_USB->HcCommandStatus | OR_CMD_STATUS_BLF; + LPC_USB->HcControl = LPC_USB->HcControl | OR_CONTROL_BLE; + } + + Host_WDHWait(); + +// if (!(TDHead->Control & 0xF0000000)) { + if (!HOST_TDControlStatus) { + return (OK); + } else { + return (ERR_TD_FAIL); + } +} + +/* +************************************************************************************************************** +* ENUMERATE THE DEVICE +* +* Description: This function is used to enumerate the device connected +* +* Arguments : None +* +* Returns : None +* +************************************************************************************************************** +*/ + +USB_INT32S Host_EnumDev (void) +{ + USB_INT32S rc; + + #ifdef DEBUG_X + PRINT_Log("Connect a Mass Storage device\n"); + #endif + while (!HOST_RhscIntr) + __WFI(); + Host_DelayMS(100); /* USB 2.0 spec says atleast 50ms delay beore port reset */ + LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRS; // Initiate port reset + while (LPC_USB->HcRhPortStatus1 & OR_RH_PORT_PRS) + __WFI(); // Wait for port reset to complete... + LPC_USB->HcRhPortStatus1 = OR_RH_PORT_PRSC; // ...and clear port reset signal + Host_DelayMS(200); /* Wait for 100 MS after port reset */ + + EDCtrl->Control = 8 << 16; /* Put max pkt size = 8 */ + /* Read first 8 bytes of device desc */ + rc = HOST_GET_DESCRIPTOR(USB_DESCRIPTOR_TYPE_DEVICE, 0, TDBuffer, 8); + if (rc != OK) { + PRINT_Err(rc); + return (rc); + } + EDCtrl->Control = TDBuffer[7] << 16; /* Get max pkt size of endpoint 0 */ + rc = HOST_SET_ADDRESS(1); /* Set the device address to 1 */ + if (rc != OK) { + PRINT_Err(rc); + return (rc); + } + Host_DelayMS(2); + EDCtrl->Control = (EDCtrl->Control) | 1; /* Modify control pipe with address 1 */ + /* Get the configuration descriptor */ + rc = HOST_GET_DESCRIPTOR(USB_DESCRIPTOR_TYPE_CONFIGURATION, 0, TDBuffer, 9); + if (rc != OK) { + PRINT_Err(rc); + return (rc); + } + /* Get the first configuration data */ + rc = HOST_GET_DESCRIPTOR(USB_DESCRIPTOR_TYPE_CONFIGURATION, 0, TDBuffer, ReadLE16U(&TDBuffer[2])); + if (rc != OK) { + PRINT_Err(rc); + return (rc); + } + rc = MS_ParseConfiguration(); /* Parse the configuration */ + if (rc != OK) { + PRINT_Err(rc); + return (rc); + } + rc = USBH_SET_CONFIGURATION(1); /* Select device configuration 1 */ + if (rc != OK) { + PRINT_Err(rc); + } + Host_DelayMS(100); /* Some devices may require this delay */ + return (rc); +} + +/* +************************************************************************************************************** +* RECEIVE THE CONTROL INFORMATION +* +* Description: This function is used to receive the control information +* +* Arguments : bm_request_type +* b_request +* w_value +* w_index +* w_length +* buffer +* +* Returns : OK if Success +* ERROR if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S Host_CtrlRecv ( USB_INT08U bm_request_type, + USB_INT08U b_request, + USB_INT16U w_value, + USB_INT16U w_index, + USB_INT16U w_length, + volatile USB_INT08U *buffer) +{ + USB_INT32S rc; + + + Host_FillSetup(bm_request_type, b_request, w_value, w_index, w_length); + rc = Host_ProcessTD(EDCtrl, TD_SETUP, TDBuffer, 8); + if (rc == OK) { + if (w_length) { + rc = Host_ProcessTD(EDCtrl, TD_IN, TDBuffer, w_length); + } + if (rc == OK) { + rc = Host_ProcessTD(EDCtrl, TD_OUT, NULL, 0); + } + } + return (rc); +} + +/* +************************************************************************************************************** +* SEND THE CONTROL INFORMATION +* +* Description: This function is used to send the control information +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +USB_INT32S Host_CtrlSend ( USB_INT08U bm_request_type, + USB_INT08U b_request, + USB_INT16U w_value, + USB_INT16U w_index, + USB_INT16U w_length, + volatile USB_INT08U *buffer) +{ + USB_INT32S rc; + + + Host_FillSetup(bm_request_type, b_request, w_value, w_index, w_length); + + rc = Host_ProcessTD(EDCtrl, TD_SETUP, TDBuffer, 8); + if (rc == OK) { + if (w_length) { + rc = Host_ProcessTD(EDCtrl, TD_OUT, TDBuffer, w_length); + } + if (rc == OK) { + rc = Host_ProcessTD(EDCtrl, TD_IN, NULL, 0); + } + } + return (rc); +} + +/* +************************************************************************************************************** +* FILL SETUP PACKET +* +* Description: This function is used to fill the setup packet +* +* Arguments : None +* +* Returns : OK if Success +* ERR_INVALID_BOOTSIG if Failed +* +************************************************************************************************************** +*/ + +void Host_FillSetup (USB_INT08U bm_request_type, + USB_INT08U b_request, + USB_INT16U w_value, + USB_INT16U w_index, + USB_INT16U w_length) +{ + int i; + for (i=0;i<w_length;i++) + TDBuffer[i] = 0; + + TDBuffer[0] = bm_request_type; + TDBuffer[1] = b_request; + WriteLE16U(&TDBuffer[2], w_value); + WriteLE16U(&TDBuffer[4], w_index); + WriteLE16U(&TDBuffer[6], w_length); +} + + + +/* +************************************************************************************************************** +* INITIALIZE THE TRANSFER DESCRIPTOR +* +* Description: This function initializes transfer descriptor +* +* Arguments : Pointer to TD structure +* +* Returns : None +* +************************************************************************************************************** +*/ + +void Host_TDInit (volatile HCTD *td) +{ + + td->Control = 0; + td->CurrBufPtr = 0; + td->Next = 0; + td->BufEnd = 0; +} + +/* +************************************************************************************************************** +* INITIALIZE THE ENDPOINT DESCRIPTOR +* +* Description: This function initializes endpoint descriptor +* +* Arguments : Pointer to ED strcuture +* +* Returns : None +* +************************************************************************************************************** +*/ + +void Host_EDInit (volatile HCED *ed) +{ + + ed->Control = 0; + ed->TailTd = 0; + ed->HeadTd = 0; + ed->Next = 0; +} + +/* +************************************************************************************************************** +* INITIALIZE HOST CONTROLLER COMMUNICATIONS AREA +* +* Description: This function initializes host controller communications area +* +* Arguments : Pointer to HCCA +* +* Returns : +* +************************************************************************************************************** +*/ + +void Host_HCCAInit (volatile HCCA *hcca) +{ + USB_INT32U i; + + + for (i = 0; i < 32; i++) { + + hcca->IntTable[i] = 0; + hcca->FrameNumber = 0; + hcca->DoneHead = 0; + } + +} + +/* +************************************************************************************************************** +* WAIT FOR WDH INTERRUPT +* +* Description: This function is infinite loop which breaks when ever a WDH interrupt rises +* +* Arguments : None +* +* Returns : None +* +************************************************************************************************************** +*/ + +void Host_WDHWait (void) +{ + while (!HOST_WdhIntr) + __WFI(); + + HOST_WdhIntr = 0; +} + +/* +************************************************************************************************************** +* READ LE 32U +* +* Description: This function is used to read an unsigned integer from a character buffer in the platform +* containing little endian processor +* +* Arguments : pmem Pointer to the character buffer +* +* Returns : val Unsigned integer +* +************************************************************************************************************** +*/ + +USB_INT32U ReadLE32U (volatile USB_INT08U *pmem) +{ + USB_INT32U val = *(USB_INT32U*)pmem; +#ifdef __BIG_ENDIAN + return __REV(val); +#else + return val; +#endif +} + +/* +************************************************************************************************************** +* WRITE LE 32U +* +* Description: This function is used to write an unsigned integer into a charecter buffer in the platform +* containing little endian processor. +* +* Arguments : pmem Pointer to the charecter buffer +* val Integer value to be placed in the charecter buffer +* +* Returns : None +* +************************************************************************************************************** +*/ + +void WriteLE32U (volatile USB_INT08U *pmem, + USB_INT32U val) +{ +#ifdef __BIG_ENDIAN + *(USB_INT32U*)pmem = __REV(val); +#else + *(USB_INT32U*)pmem = val; +#endif +} + +/* +************************************************************************************************************** +* READ LE 16U +* +* Description: This function is used to read an unsigned short integer from a charecter buffer in the platform +* containing little endian processor +* +* Arguments : pmem Pointer to the charecter buffer +* +* Returns : val Unsigned short integer +* +************************************************************************************************************** +*/ + +USB_INT16U ReadLE16U (volatile USB_INT08U *pmem) +{ + USB_INT16U val = *(USB_INT16U*)pmem; +#ifdef __BIG_ENDIAN + return __REV16(val); +#else + return val; +#endif +} + +/* +************************************************************************************************************** +* WRITE LE 16U +* +* Description: This function is used to write an unsigned short integer into a charecter buffer in the +* platform containing little endian processor +* +* Arguments : pmem Pointer to the charecter buffer +* val Value to be placed in the charecter buffer +* +* Returns : None +* +************************************************************************************************************** +*/ + +void WriteLE16U (volatile USB_INT08U *pmem, + USB_INT16U val) +{ +#ifdef __BIG_ENDIAN + *(USB_INT16U*)pmem = (__REV16(val) & 0xFFFF); +#else + *(USB_INT16U*)pmem = val; +#endif +} + +/* +************************************************************************************************************** +* READ BE 32U +* +* Description: This function is used to read an unsigned integer from a charecter buffer in the platform +* containing big endian processor +* +* Arguments : pmem Pointer to the charecter buffer +* +* Returns : val Unsigned integer +* +************************************************************************************************************** +*/ + +USB_INT32U ReadBE32U (volatile USB_INT08U *pmem) +{ + USB_INT32U val = *(USB_INT32U*)pmem; +#ifdef __BIG_ENDIAN + return val; +#else + return __REV(val); +#endif +} + +/* +************************************************************************************************************** +* WRITE BE 32U +* +* Description: This function is used to write an unsigned integer into a charecter buffer in the platform +* containing big endian processor +* +* Arguments : pmem Pointer to the charecter buffer +* val Value to be placed in the charecter buffer +* +* Returns : None +* +************************************************************************************************************** +*/ + +void WriteBE32U (volatile USB_INT08U *pmem, + USB_INT32U val) +{ +#ifdef __BIG_ENDIAN + *(USB_INT32U*)pmem = val; +#else + *(USB_INT32U*)pmem = __REV(val); +#endif +} + +/* +************************************************************************************************************** +* READ BE 16U +* +* Description: This function is used to read an unsigned short integer from a charecter buffer in the platform +* containing big endian processor +* +* Arguments : pmem Pointer to the charecter buffer +* +* Returns : val Unsigned short integer +* +************************************************************************************************************** +*/ + +USB_INT16U ReadBE16U (volatile USB_INT08U *pmem) +{ + USB_INT16U val = *(USB_INT16U*)pmem; +#ifdef __BIG_ENDIAN + return val; +#else + return __REV16(val); +#endif +} + +/* +************************************************************************************************************** +* WRITE BE 16U +* +* Description: This function is used to write an unsigned short integer into the charecter buffer in the +* platform containing big endian processor +* +* Arguments : pmem Pointer to the charecter buffer +* val Value to be placed in the charecter buffer +* +* Returns : None +* +************************************************************************************************************** +*/ + +void WriteBE16U (volatile USB_INT08U *pmem, + USB_INT16U val) +{ +#ifdef __BIG_ENDIAN + *(USB_INT16U*)pmem = val; +#else + *(USB_INT16U*)pmem = (__REV16(val) & 0xFFFF); +#endif +}