static void PIOS_USB_CDC_CTRL_EP_IN_Callback(void)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
/* Give back UART State Bitmap */
/* UART State Bitmap
* 15-7: reserved
* 6: bOverRun overrun error
* 5: bParity parity error
* 4: bFraming framing error
* 3: bRingSignal RI
* 2: bBreak break reception
* 1: bTxCarrier DSR
* 0: bRxCarrier DCD
*/
uart_state.bmUartState = htousbs(0x0003);
UserToPMABufferCopy((uint8_t *) &uart_state,
GetEPTxAddr(usb_cdc_dev->cfg->ctrl_tx_ep),
sizeof(uart_state));
SetEPTxCount(usb_cdc_dev->cfg->ctrl_tx_ep, PIOS_USB_BOARD_CDC_MGMT_LENGTH);
SetEPTxValid(usb_cdc_dev->cfg->ctrl_tx_ep);
}
static void PIOS_USB_CDC_DATA_EP_IN_Callback(void)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
PIOS_USB_CDC_SendData(usb_cdc_dev);
}
RESULT PIOS_USB_CDC_SetLineCoding(void)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
return USB_SUCCESS;
}
static bool PIOS_USB_CDC_Available (uintptr_t usbcdc_id)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
return (PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id) &&
(control_line_state & USB_CDC_CONTROL_LINE_STATE_DTE_PRESENT));
}
static void PIOS_USB_CDC_DATA_EP_OUT_Callback(void)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
uint32_t DataLength;
/* Get the number of received data on the selected Endpoint */
DataLength = GetEPRxCount(usb_cdc_dev->cfg->data_rx_ep);
if (DataLength > sizeof(usb_cdc_dev->rx_packet_buffer)) {
usb_cdc_dev->rx_oversize++;
DataLength = sizeof(usb_cdc_dev->rx_packet_buffer);
}
/* Use the memory interface function to read from the selected endpoint */
PMAToUserBufferCopy((uint8_t *) usb_cdc_dev->rx_packet_buffer,
GetEPRxAddr(usb_cdc_dev->cfg->data_rx_ep),
DataLength);
if (!usb_cdc_dev->rx_in_cb) {
/* No Rx call back registered, disable the receiver */
SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_NAK);
return;
}
uint16_t headroom;
bool need_yield = false;
uint16_t rc;
rc = (usb_cdc_dev->rx_in_cb)(usb_cdc_dev->rx_in_context,
usb_cdc_dev->rx_packet_buffer,
DataLength,
&headroom,
&need_yield);
if (rc < DataLength) {
/* Lost bytes on rx */
usb_cdc_dev->rx_dropped += (DataLength - rc);
}
if (headroom >= sizeof(usb_cdc_dev->rx_packet_buffer)) {
/* We have room for a maximum length message */
SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_VALID);
} else {
/* Not enough room left for a message, apply backpressure */
SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_NAK);
}
#if defined(PIOS_INCLUDE_FREERTOS)
if (need_yield) {
vPortYieldFromISR();
}
#endif /* PIOS_INCLUDE_FREERTOS */
}
static void PIOS_USB_CDC_RegisterTxCallback(uintptr_t usbcdc_id, pios_com_callback tx_out_cb, uintptr_t context)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
/*
* Order is important in these assignments since ISR uses _cb
* field to determine if it's ok to dereference _cb and _context
*/
usb_cdc_dev->tx_out_context = context;
usb_cdc_dev->tx_out_cb = tx_out_cb;
}
const uint8_t *PIOS_USB_CDC_GetLineCoding(uint16_t Length)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
if (Length == 0) {
pInformation->Ctrl_Info.Usb_wLength = sizeof(line_coding);
return NULL;
} else {
return ((uint8_t *) &line_coding);
}
}
RESULT PIOS_USB_CDC_SetControlLineState(void)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
static uint16_t control_line_state;
uint8_t wValue0 = pInformation->USBwValue0;
uint8_t wValue1 = pInformation->USBwValue1;
control_line_state = wValue1 << 8 | wValue0;
return USB_SUCCESS;
}
RESULT PIOS_USB_CDC_SetControlLineState(void)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
if (!valid) {
/* No CDC interface is configured */
return USB_UNSUPPORT;
}
uint8_t wValue0 = pInformation->USBwValue0;
uint8_t wValue1 = pInformation->USBwValue1;
control_line_state = wValue1 << 8 | wValue0;
return USB_SUCCESS;
}
static void PIOS_USB_CDC_TxStart(uintptr_t usbcdc_id, uint16_t tx_bytes_avail)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
if (!PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id)) {
return;
}
if (GetEPTxStatus(usb_cdc_dev->cfg->data_tx_ep) == EP_TX_VALID) {
/* Endpoint is already transmitting */
return;
}
PIOS_USB_CDC_SendData(usb_cdc_dev);
}
static void PIOS_USB_CDC_RxStart(uintptr_t usbcdc_id, uint16_t rx_bytes_avail) {
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)usbcdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
PIOS_Assert(valid);
if (!PIOS_USB_CheckAvailable(usb_cdc_dev->lower_id)) {
return;
}
// If endpoint was stalled and there is now space make it valid
PIOS_IRQ_Disable();
if ((GetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep) != EP_RX_VALID) &&
(rx_bytes_avail >= sizeof(usb_cdc_dev->rx_packet_buffer))) {
SetEPRxStatus(usb_cdc_dev->cfg->data_rx_ep, EP_RX_VALID);
}
PIOS_IRQ_Enable();
}
uint8_t *PIOS_USB_CDC_SetLineCoding(uint16_t Length)
{
struct pios_usb_cdc_dev * usb_cdc_dev = (struct pios_usb_cdc_dev *)pios_usb_cdc_id;
bool valid = PIOS_USB_CDC_validate(usb_cdc_dev);
if (!valid) {
/* No CDC interface is configured */
return NULL;
}
if (Length == 0) {
/* Report the number of bytes we're prepared to consume */
pInformation->Ctrl_Info.Usb_wLength = sizeof(line_coding);
pInformation->Ctrl_Info.Usb_rLength = sizeof(line_coding);
return NULL;
} else {
/* Give out a pointer to the data struct */
return ((uint8_t *) &line_coding);
}
}
