/**
* Answer To Reset (ATR)
* \param pAtr ATR buffer
* \param pLength Pointer for store the ATR length
*/
void ISO7816_Datablock_ATR( uint8_t* pAtr, uint8_t* pLength )
{
uint32_t i;
uint32_t j;
uint32_t y;
*pLength = 0;
/* Read ATR TS */
ISO7816_GetChar(&pAtr[0]);
/* Read ATR T0 */
ISO7816_GetChar(&pAtr[1]);
y = pAtr[1] & 0xF0;
i = 2;
/* Read ATR Ti */
while (y) {
if (y & 0x10) { /* TA[i] */
ISO7816_GetChar(&pAtr[i++]);
}
if (y & 0x20) { /* TB[i] */
ISO7816_GetChar(&pAtr[i++]);
}
if (y & 0x40) { /* TC[i] */
ISO7816_GetChar(&pAtr[i++]);
}
if (y & 0x80) { /* TD[i] */
ISO7816_GetChar(&pAtr[i]);
y = pAtr[i++] & 0xF0;
}
else {
y = 0;
}
}
/* Historical Bytes */
y = pAtr[1] & 0x0F;
for( j=0; j < y; j++ ) {
ISO7816_GetChar(&pAtr[i++]);
}
TRACE_DEBUG_WP("Length = %d", i);
TRACE_DEBUG_WP("ATR = ");
for (j=0; j < i; j++) {
TRACE_DEBUG_WP("%02x ", pAtr[j]);
}
TRACE_DEBUG_WP("\n\r");
*pLength = i;
}
/**
* \brief Initialize a list of OV registers.
* The list of registers is terminated by the pair of values
* \param pTwid TWI interface
* \param pReglist Register list to be written
* \return 0 if no error; otherwise TWID_ERROR_BUSY
*/
uint32_t ov_write_regs8(Twid *pTwid, const struct ov_reg* pReglist)
{
uint32_t err;
uint32_t size=0;
const struct ov_reg *pNext = pReglist;
volatile uint32_t delay;
TRACE_DEBUG("ov_write_regs:");
while (!((pNext->reg == OV_REG_TERM) && (pNext->val == OV_VAL_TERM)))
{
err = ov_write_reg8(pTwid, pNext->reg, pNext->val);
size++;
for(delay=0;delay<=10000;delay++);
if (err == TWID_ERROR_BUSY)
{
TRACE_ERROR("ov_write_regs: TWI ERROR\n\r");
return err;
}
TRACE_DEBUG("(0x%02x,0x%02x) \n\r", pNext->reg,pNext->val);
pNext++;
}
TRACE_DEBUG_WP("\n\r");
return 0;
}
/**
* Reuse first used/released buffer with new buffer address and size to be used
* in transfer again. Only valid when frame list is ringed. Can be used for
* both read & write.
* \param bEndpoint Endpoint number.
* \param pNewBuffer Pointer to new buffer with data to send (0 to keep last).
* \param wNewSize Size of the data buffer
*/
uint8_t USBD_MblReuse( uint8_t bEndpoint,
uint8_t *pNewBuffer,
uint16_t wNewSize )
{
Endpoint *pEndpoint = &(endpoints[bEndpoint]);
MblTransfer *pTransfer = (MblTransfer*)&(pEndpoint->transfer);
USBDTransferBuffer *pBi = &(pTransfer->pMbl[pTransfer->freedBuffer]);
TRACE_DEBUG_WP("MblReuse(%d), st%x, circ%d\n\r",
bEndpoint, pEndpoint->state, pTransfer->circList);
/* Only for Multi-buffer-circle list */
if (bEndpoint != 0
&& (pEndpoint->state == UDP_ENDPOINT_RECEIVINGM
|| pEndpoint->state == UDP_ENDPOINT_SENDINGM)
&& pTransfer->circList) {
}
else {
return USBD_STATUS_WRONG_STATE;
}
/* Check if there is freed buffer */
if (pTransfer->freedBuffer == pTransfer->currBuffer
&& !pTransfer->allUsed) {
return USBD_STATUS_LOCKED;
}
/* Update transfer information */
if ((++ pTransfer->freedBuffer) == pTransfer->listSize)
pTransfer->freedBuffer = 0;
if (pNewBuffer) {
pBi->pBuffer = pNewBuffer;
pBi->size = wNewSize;
}
pBi->buffered = 0;
pBi->transferred = 0;
pBi->remaining = pBi->size;
/* At least one buffer is not processed */
pTransfer->allUsed = 0;
return USBD_STATUS_SUCCESS;
}
/**
* Sends data frames through a USB endpoint. Sets up the transfer descriptor
* list, writes one or two data payloads (depending on the number of FIFO bank
* for the endpoint) and then starts the actual transfer. The operation is
* complete when all the data has been sent.
*
* *If the size of the frame is greater than the size of the endpoint
* (or twice the size if the endpoint has two FIFO banks), then the buffer
* must be kept allocated until the frame is finished*. This means that
* it is not possible to declare it on the stack (i.e. as a local variable
* of a function which returns after starting a transfer).
*
* \param bEndpoint Endpoint number.
* \param pMbl Pointer to a frame (USBDTransferBuffer) list that describes
* the buffer list to send.
* \param wListSize Size of the frame list.
* \param bCircList Circle the list.
* \param wStartNdx For circled list only, the first buffer index to transfer.
* \param fCallback Optional callback function to invoke when the transfer is
* complete.
* \param pArgument Optional argument to the callback function.
* \return USBD_STATUS_SUCCESS if the transfer has been started;
* otherwise, the corresponding error status code.
* \see USBDTransferBuffer, MblTransferCallback, USBD_MblReuse
*/
uint8_t USBD_MblWrite( uint8_t bEndpoint,
void *pMbl,
uint16_t wListSize,
uint8_t bCircList,
uint16_t wStartNdx,
MblTransferCallback fCallback,
void *pArgument )
{
Endpoint *pEndpoint = &(endpoints[bEndpoint]);
MblTransfer *pTransfer = (MblTransfer*)&(pEndpoint->transfer);
uint16_t i;
/* EP0 is not suitable for Mbl */
if (bEndpoint == 0) {
return USBD_STATUS_INVALID_PARAMETER;
}
/* Check that the endpoint is in Idle state */
if (pEndpoint->state != UDP_ENDPOINT_IDLE) {
return USBD_STATUS_LOCKED;
}
pEndpoint->state = UDP_ENDPOINT_SENDINGM;
TRACE_DEBUG_WP("WriteM%d(0x%x,%d) ", bEndpoint, pMbl, wListSize);
/* Start from first if not circled list */
if (!bCircList) wStartNdx = 0;
/* Setup the transfer descriptor */
pTransfer->pMbl = (USBDTransferBuffer*)pMbl;
pTransfer->listSize = wListSize;
pTransfer->fCallback = fCallback;
pTransfer->pArgument = pArgument;
pTransfer->currBuffer = wStartNdx;
pTransfer->freedBuffer = 0;
pTransfer->pLastLoaded = &(((USBDTransferBuffer*)pMbl)[wStartNdx]);
pTransfer->circList = bCircList;
pTransfer->allUsed = 0;
/* Clear all buffer */
for (i = 0; i < wListSize; i ++) {
pTransfer->pMbl[i].transferred = 0;
pTransfer->pMbl[i].buffered = 0;
pTransfer->pMbl[i].remaining = pTransfer->pMbl[i].size;
}
/* Send the first packet */
while((UDP->UDP_CSR[bEndpoint]&UDP_CSR_TXPKTRDY)==UDP_CSR_TXPKTRDY);
UDP_MblWriteFifo(bEndpoint);
SET_CSR(bEndpoint, UDP_CSR_TXPKTRDY);
/* If double buffering is enabled and there is data remaining, */
/* prepare another packet */
if ((CHIP_USB_ENDPOINTS_BANKS(bEndpoint) > 1)
&& (pTransfer->pMbl[pTransfer->currBuffer].remaining > 0)) {
UDP_MblWriteFifo(bEndpoint);
}
/* Enable interrupt on endpoint */
UDP->UDP_IER = 1 << bEndpoint;
return USBD_STATUS_SUCCESS;
}
//------------------------------------------------------------------------------
/// USB interrupt subroutine
///
/// This function is called each time a USB interrupt occurs.
/// The following USB DEVICE events are taken in charge:
/// - VBus On / Off
/// - Start Of Frame
/// - Suspend
/// - Wake-Up
/// - Resume
/// - Reset
/// - Start of frame
///
/// The following USB HOST events are taken in charge:
/// - Device connection
/// - Device Disconnection
/// - Start Of Frame
/// - ID pin change
/// - SOF (or Keep alive in low speed) sent
/// - Wake up on USB line detected
///
/// The following USB HOST events are taken in charge:
/// - HNP success (Role Exchange)
/// - HNP failure (HNP Error)
///
/// For each event, the user can launch an action by completing
/// the associate define (See conf_usb.h file to add action upon events)
///
/// Note: Only interrupts events that are enabled are processed
//------------------------------------------------------------------------------
void usb_general_interrupt(void)
{
//TRACE_DEBUG("usb_general_interrupt\n\r");
// ---------- DEVICE events management -----------------------------------
// -----------------------------------------------------------------------
//- VBUS state detection
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
if (Is_usb_vbus_transition() && Is_usb_vbus_interrupt_enabled()
&& Is_usb_id_device()) {
Usb_ack_vbus_transition();
if (Is_usb_vbus_high()) {
usb_connected = TRUE;
Usb_vbus_on_action();
Usb_send_event(EVT_USB_POWERED);
//jcb Usb_enable_reset_interrupt();
//usb_start_device();
USBD_Connect();//Usb_attach();
}
else {
TRACE_DEBUG("VBUS low\n\r");
USBD_Disconnect();
Usb_device_stop_hnp();
TRACE_DEBUG("Usb_select_device4\n\r");
Usb_select_device();
Clear_all_user_request();
Usb_vbus_off_action();
usb_connected = FALSE;
usb_configuration_nb = 0;
Usb_send_event(EVT_USB_UNPOWERED);
}
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Device start of frame received
if (Is_usb_sof() && Is_sof_interrupt_enabled()) {
// TRACE_DEBUG_WP("F"); // device
Usb_ack_sof();
Usb_sof_action();
//sof_seen_in_session = TRUE;
otg_last_sof_received = UDFNUML; // store last frame number received
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Device Suspend event (no more USB activity detected)
if (Is_usb_suspend()) { //&& Is_suspend_interrupt_enabled()) {
//TRACE_DEBUG_WP("D\n\r");
// 1st : B-PERIPH mode ?
if (Is_usb_id_device()) {
// HNP Handler
TRACE_DEBUG("HNP Handler\n\r");
//TRACE_DEBUG("device_state = %d\n\r", device_state);
//TRACE_DEBUG("b_uut_device_state = %d\n\r", b_uut_device_state);
if (Is_host_requested_hnp() // "b_hnp_enable" feature received
&& (Is_session_started_with_srp() || Is_user_requested_hnp() )) {
if (otg_device_nb_hnp_retry == 0) {
otg_features_supported &= ~USBFeatureRequest_OTG_B_HNP_ENABLE;
}
else {
Ack_user_request_hnp();
Usb_ack_hnp_error_interrupt();
Usb_ack_role_exchange_interrupt();
Usb_enable_role_exchange_interrupt();
Usb_enable_hnp_error_interrupt();
Usb_device_initiate_hnp();
otg_device_nb_hnp_retry--;
}
}
else
{
// Remote wake-up handler
//TRACE_DEBUG("Remote wake-up handler\n\r");
//TRACE_DEBUG("device_state = %d\n\r", device_state);
//TRACE_DEBUG("b_uut_device_state = %d\n\r", b_uut_device_state);
if ((remote_wakeup_feature == ENABLE) && (usb_configuration_nb != 0))
{
//TRACE_DEBUG("enabled\n\r");
// After that user can execute "Usb_initiate_remote_wake_up()" to initiate a remote wake-up
// Note that the suspend interrupt flag SUSPI must still be set to enable upstream resume
// So the SUSPE enable bit must be cleared to avoid redundant interrupt
// ****************
// Please note also that is Vbus is lost during an upstream resume (Host disconnection),
// the RMWKUP bit (used to initiate remote wake up and that is normally cleared by hardware when sent)
// remains set after the event, so that a good way to handle this feature is :
// Usb_initiate_remote_wake_up();
// while (Is_usb_pending_remote_wake_up())
// {
// if (Is_usb_vbus_low())
// {
// // Emergency action (reset macro, etc.) if Vbus lost during resuming
// break;
// }
// }
// Usb_ack_remote_wake_up_start();
// ****************
}
else {
//TRACE_DEBUG("disabled: %d %d\n\r", usb_configuration_nb, remote_wakeup_feature);
// No remote wake-up supported
Usb_send_event(EVT_USB_SUSPEND);
}
}
}
else
{
//TRACE_DEBUG("ici\n\r");
// A-PERIPH mode (will cause a session end, handled in usb_host_task.c)
Usb_send_event(EVT_USB_SUSPEND);
Usb_suspend_action();
//jcb Usb_ack_suspend();
}
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Wake up event (USB activity detected): Used to resume
if (Is_usb_wake_up() && Is_swake_up_interrupt_enabled()) {
TRACE_DEBUG("W\n\r");
Usb_unfreeze_clock();
Usb_send_event(EVT_USB_WAKE_UP);
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Resume state bus detection
if (Is_usb_resume() && Is_resume_interrupt_enabled()) {
TRACE_DEBUG("Resume state bus detect\n\r");
Usb_send_event(EVT_USB_RESUME);
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - USB bus reset detection
if (Is_usb_reset()&& Is_reset_interrupt_enabled()) {
TRACE_DEBUG_WP("B\n\r");
if (Is_usb_id_host()) {
//TRACE_DEBUG_WP("id_host\n\r");
dev_configure_endpoint(EP_CONTROL,
TYPE_CONTROL,
DIRECTION_OUT,
SIZE_64,
ONE_BANK,
NYET_DISABLED);
}
// First initialization is important to be synchronized
// A reset must first have been received
if (device_state == A_PERIPHERAL) {
//TRACE_DEBUG_WP("r A_PERIPHERAL\n\r");
otg_last_sof_received = UDFNUML;
otg_last_sof_stored = UDFNUML;
Usb_ack_sof();
Usb_enable_sof_interrupt();
reset_received = TRUE;
Timer16_set_counter(0);
}
Usb_reset_action();
Usb_send_event(EVT_USB_RESET);
}
// ---------- OTG events management ------------------------------------
// ---------------------------------------------------------------------
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
// - OTG HNP Success detection
if (Is_usb_role_exchange_interrupt() && Is_role_exchange_interrupt_enabled()) {
// TRACE_DEBUG("OTG HNP detect\n\r");
Usb_ack_role_exchange_interrupt();
Host_ack_device_connection();
Host_ack_device_disconnection();
Otg_send_event(EVT_OTG_HNP_SUCCESS);
End_session_with_srp();
Clear_otg_features_from_host();
if (Is_usb_id_host()) {
// HOST (A- or B-) mode
if ((device_state != A_PERIPHERAL) && (device_state != A_END_HNP_WAIT_VFALL)) {
static volatile unsigned int jcb;
// Current mode is A-HOST, device will take the A-PERIPHERAL role
b_uut_device_state = B_PERIPHERAL;
device_state = A_PERIPHERAL;
usb_connected = FALSE;
usb_configuration_nb = 0;
Usb_select_device();
USBD_Connect();//Usb_attach();
Usb_unfreeze_clock();
Usb_disable_role_exchange_interrupt();
Usb_disable_hnp_error_interrupt();
Usb_device_stop_hnp();
Usb_ack_reset();
Timer16_set_counter(0);
Usb_freeze_clock(); // USB clock can be freezed to slow down events and condition detection
//jcb while (Timer16_get_counter_low() != 20);
jcb=0;
while( jcb <100000){ jcb++; }
Usb_unfreeze_clock();
reset_received = FALSE;
Usb_disable_sof_interrupt(); // will be set in the next OTG Timer IT (mandatory)
Usb_enable_suspend_interrupt();
Usb_enable_reset_interrupt();
dev_configure_endpoint(EP_CONTROL,
TYPE_CONTROL,
DIRECTION_OUT,
SIZE_64,
ONE_BANK,
NYET_DISABLED);
}
}
else {
// In B_HOST mode, the HNPREQ bit must not be cleared because it releases the bus in suspend mode (and sof can't start)
if ((b_uut_device_state != B_HOST) && (b_uut_device_state != B_END_HNP_SUSPEND)) {
static volatile unsigned int jcb2;
// Current mode is B-PERIPHERAL, device will go into B-HOST role
End_session_with_srp();
Clear_otg_features_from_host();
b_uut_device_state = B_HOST;
device_state = DEVICE_ATTACHED;
usb_connected = FALSE;
usb_configuration_nb = 0;
TRACE_DEBUG("Select host 3\n\r");
Usb_select_host();
TRACE_DEBUG("Send reset\n\r");
Host_send_reset(); // send the first RESET
while (Host_is_reset());
TRACE_DEBUG("Reset passed\n\r");
jcb2=0;
while( jcb2 <1000000){ jcb2++; }
Host_enable_sof(); // start Host (sof)
Usb_disable_role_exchange_interrupt();
Usb_disable_hnp_error_interrupt();
Clear_all_user_request();
TRACE_DEBUG("Select host 3\n\r");
}
}
}
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
// - OTG HNP Failure detection
if (Is_usb_hnp() && Is_usb_hnp_error_interrupt()&& Is_hnp_error_interrupt_enabled()) {
TRACE_DEBUG("OTG HNP failure\n\r");
Usb_device_stop_hnp();
Usb_disable_role_exchange_interrupt();
Usb_disable_hnp_error_interrupt();
Usb_ack_hnp_error_interrupt();
if (Is_usb_id_device()) {
Otg_send_event(EVT_OTG_HNP_ERROR);
Clear_all_user_request();
}
}
// ---------- HOST events management -----------------------------------
// ---------------------------------------------------------------------
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
// - ID pin change detection
if(Is_usb_id_transition()&&Is_usb_id_interrupt_enabled()) {
TRACE_DEBUG("ID pin change\n\r");
TRACE_DEBUG("device_state = %d\n\r", device_state);
TRACE_DEBUG("b_uut_device_state = %d\n\r", b_uut_device_state);
Usb_device_stop_hnp();
Clear_all_user_request();
if(Is_usb_id_device()) {
g_usb_mode = USB_MODE_DEVICE;
}
else {
g_usb_mode = USB_MODE_HOST;
}
Usb_ack_id_transition();
if( g_usb_mode != g_old_usb_mode) { // Basic Debounce
if(Is_usb_id_device()) { // Going into device mode
Usb_send_event(EVT_USB_DEVICE_FUNCTION);
b_uut_device_state = B_IDLE;
device_state = DEVICE_UNATTACHED;
id_changed_to_host_event = DISABLE;
}
else { // Going into host mode
b_uut_device_state = B_IDLE;
device_state = DEVICE_UNATTACHED;
Usb_send_event(EVT_USB_HOST_FUNCTION);
id_changed_to_host_event = ENABLE;
}
Usb_id_transition_action();
TRACE_INFO("Pin Id changed\n\r");
}
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - The device has been disconnected
// JCB to be fix
if(Is_device_disconnection() && Is_host_device_disconnection_interrupt_enabled()) {
TRACE_DEBUG("device disconnect\n\r");
host_disable_all_pipe();
Host_ack_device_disconnection();
device_state=DEVICE_DISCONNECTED;
Usb_send_event(EVT_HOST_DISCONNECTION);
TRACE_INFO("Device disconnected\n\r");
Host_device_disconnection_action();
Clear_all_user_request();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - Device connection
if(Is_device_connection() && Is_host_device_connection_interrupt_enabled()) {
TRACE_DEBUG("device connect\n\r");
Host_ack_device_connection();
host_disable_all_pipe();
Host_device_connection_action();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - Host Start of frame has been sent
if (Is_host_sof() && Is_host_sof_interrupt_enabled()) {
//TRACE_DEBUG_WP("_"); // host
Host_ack_sof();
Usb_send_event(EVT_HOST_SOF);
private_sof_counter++;
// delay timeout management for interrupt tranfer mode in host mode
#if ((USB_HOST_PIPE_INTERRUPT_TRANSFER==ENABLE) && (TIMEOUT_DELAY_ENABLE==ENABLE))
if (private_sof_counter>=250) { // Count 1/4 sec
private_sof_counter=0;
for(i=0;i<MAX_EP_NB;i++) {
if(it_pipe_str[i].enable==ENABLE) {
save_pipe_nb=Host_get_selected_pipe();
Host_select_pipe(i);
if((++it_pipe_str[i].timeout>TIMEOUT_DELAY) && (Host_get_pipe_type()!=TYPE_INTERRUPT)) {
it_pipe_str[i].enable=DISABLE;
it_pipe_str[i].status=PIPE_DELAY_TIMEOUT;
Host_stop_pipe_interrupt(i);
if (is_any_interrupt_pipe_active()==FALSE) { // If no more transfer is armed
if (g_sav_int_sof_enable==FALSE) {
Host_disable_sof_interrupt();
}
}
it_pipe_str[i].handle(PIPE_DELAY_TIMEOUT,it_pipe_str[i].nb_byte_processed);
}
Host_select_pipe(save_pipe_nb);
}
}
}
#endif // (USB_HOST_PIPE_INTERRUPT_TRANSFER==ENABLE) && (TIMEOUT_DELAY_ENABLE==ENABLE))
Host_sof_action();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - Host Wake-up has been received
if (Is_host_hwup() && Is_host_hwup_interrupt_enabled()) {
TRACE_DEBUG("Host wake up\n\r");
Host_disable_hwup_interrupt(); // Wake up interrupt should be disable host is now wake up !
Host_disable_remote_wakeup_interrupt();
// CAUTION HWUP can be cleared only when USB clock is active (not frozen)!
Usb_unfreeze_clock(); // Enable clock on USB interface
Host_enable_sof(); // start sending SOF
Host_ack_hwup(); // Clear HWUP interrupt flag
Host_ack_remote_wakeup();
Usb_send_event(EVT_HOST_HWUP); // Send software event
Usb_send_event(EVT_HOST_REMOTE_WAKEUP);
Host_hwup_action(); // Map custom action
if (Is_usb_hnp()) {
Usb_host_reject_hnp();
Usb_disable_hnp_error_interrupt();
Usb_disable_role_exchange_interrupt();
}
Host_send_resume();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// Remote Wake Up has been received
if (Is_host_remote_wakeup_interrupt_enabled() && Is_host_remote_wakeup()) {
TRACE_DEBUG("Remote wake up\n\r");
Host_disable_remote_wakeup_interrupt();
Host_disable_hwup_interrupt();
Host_ack_remote_wakeup();
Host_ack_hwup(); // Clear HWUP interrupt flag
Usb_unfreeze_clock(); // Enable clock on USB interface
Host_enable_sof(); // start sending SOF
Usb_send_event(EVT_HOST_REMOTE_WAKEUP);
Usb_send_event(EVT_HOST_HWUP); // Send software event
if (Is_usb_hnp()) {
Usb_host_reject_hnp();
Usb_disable_hnp_error_interrupt();
Usb_disable_role_exchange_interrupt();
}
Host_send_resume();
}
}
/**
* Sends the requested USB descriptor to the host if available, or STALLs the
* request.
* \param pDriver Pointer to a USBDDriver instance.
* \param type Type of the requested descriptor
* \param index Index of the requested descriptor.
* \param length Maximum number of bytes to return.
*/
static void GetDescriptor(
const USBDDriver *pDriver,
uint8_t type,
uint8_t indexRDesc,
uint32_t length)
{
const USBDeviceDescriptor *pDevice;
const USBConfigurationDescriptor *pConfiguration;
const USBDeviceQualifierDescriptor *pQualifier;
const USBConfigurationDescriptor *pOtherSpeed;
const USBGenericDescriptor **pStrings =
(const USBGenericDescriptor **) pDriver->pDescriptors->pStrings;
const USBGenericDescriptor *pString;
uint8_t numStrings = pDriver->pDescriptors->numStrings;
uint8_t terminateWithNull = 0;
/* Use different set of descriptors depending on device speed */
/* By default, we uses full speed values */
pDevice = pDriver->pDescriptors->pFsDevice;
pConfiguration = pDriver->pDescriptors->pFsConfiguration;
/* HS, we try HS values */
if (USBD_HAL_IsHighSpeed()) {
TRACE_DEBUG_WP("HS ");
if (pDriver->pDescriptors->pHsDevice)
pDevice = pDriver->pDescriptors->pHsDevice;
if (pDriver->pDescriptors->pHsConfiguration)
pConfiguration = pDriver->pDescriptors->pHsConfiguration;
pQualifier = pDriver->pDescriptors->pHsQualifier;
pOtherSpeed = pDriver->pDescriptors->pHsOtherSpeed;
}
else {
TRACE_DEBUG_WP("FS ");
pQualifier = pDriver->pDescriptors->pFsQualifier;
pOtherSpeed = pDriver->pDescriptors->pFsOtherSpeed;
}
/* Check the descriptor type */
switch (type) {
case USBGenericDescriptor_DEVICE:
TRACE_INFO_WP("Dev ");
/* Adjust length and send descriptor */
if (length > USBGenericDescriptor_GetLength((USBGenericDescriptor *) pDevice)) {
length = USBGenericDescriptor_GetLength((USBGenericDescriptor *) pDevice);
}
USBD_Write(0, pDevice, length, 0, 0);
break;
case USBGenericDescriptor_CONFIGURATION:
TRACE_INFO_WP("Cfg ");
/* Adjust length and send descriptor */
if (length > USBConfigurationDescriptor_GetTotalLength(pConfiguration)) {
length = USBConfigurationDescriptor_GetTotalLength(pConfiguration);
terminateWithNull = ((length % pDevice->bMaxPacketSize0) == 0);
}
USBD_Write(0,
pConfiguration,
length,
terminateWithNull ? TerminateCtrlInWithNull : 0,
0);
break;
case USBGenericDescriptor_DEVICEQUALIFIER:
TRACE_INFO_WP("Qua ");
/* Check if descriptor exists */
if (!pQualifier) {
USBD_Stall(0);
}
else {
/* Adjust length and send descriptor */
if (length > USBGenericDescriptor_GetLength((USBGenericDescriptor *) pQualifier)) {
length = USBGenericDescriptor_GetLength((USBGenericDescriptor *) pQualifier);
}
USBD_Write(0, pQualifier, length, 0, 0);
}
break;
case USBGenericDescriptor_OTHERSPEEDCONFIGURATION:
TRACE_INFO_WP("OSC ");
/* Check if descriptor exists */
if (!pOtherSpeed) {
USBD_Stall(0);
}
else {
/* Adjust length and send descriptor */
if (length > USBConfigurationDescriptor_GetTotalLength(pOtherSpeed)) {
length = USBConfigurationDescriptor_GetTotalLength(pOtherSpeed);
terminateWithNull = ((length % pDevice->bMaxPacketSize0) == 0);
}
USBD_Write(0,
pOtherSpeed,
length,
terminateWithNull ? TerminateCtrlInWithNull : 0,
0);
}
break;
case USBGenericDescriptor_STRING:
TRACE_INFO_WP("Str%d ", indexRDesc);
/* Check if descriptor exists */
if (indexRDesc >= numStrings) {
USBD_Stall(0);
}
else {
pString = pStrings[indexRDesc];
/* Adjust length and send descriptor */
if (length > USBGenericDescriptor_GetLength(pString)) {
length = USBGenericDescriptor_GetLength(pString);
terminateWithNull = ((length % pDevice->bMaxPacketSize0) == 0);
}
USBD_Write(0,
pString,
length,
terminateWithNull ? TerminateCtrlInWithNull : 0,
0);
}
break;
default:
TRACE_WARNING(
"USBDDriver_GetDescriptor: Unknown descriptor type (%d)\n\r",
type);
USBD_Stall(0);
}
}