/**
* @brief VCP_DataTx
* CDC data to be sent to the Host (app) over USB
* @param Buf: Buffer of data to be sent
* @param Len: Number of data to be sent (in bytes)
* @retval Result of the operation: USBD_OK if all operations are OK else VCP_FAIL
*/
static uint16_t VCP_DataTx(const uint8_t* Buf, uint32_t Len)
{
/*
make sure that any paragraph end frame is not in play
could just check for: USB_CDC_ZLP, but better to be safe
and wait for any existing transmission to complete.
*/
while (USB_Tx_State != 0);
for (uint32_t i = 0; i < Len; i++) {
APP_Rx_Buffer[APP_Rx_ptr_in] = Buf[i];
APP_Rx_ptr_in = (APP_Rx_ptr_in + 1) % APP_RX_DATA_SIZE;
while (CDC_Send_FreeBytes() == 0) {
delay(1);
}
}
return USBD_OK;
}
static uint32_t usbTxBytesFree(const serialPort_t *instance)
{
UNUSED(instance);
return CDC_Send_FreeBytes();
}
uint32_t usbTxBytesFree()
{
return CDC_Send_FreeBytes();
}
