diff options
Diffstat (limited to 'LUFA/Drivers/USB/Class/Device/CDC.c')
-rw-r--r-- | LUFA/Drivers/USB/Class/Device/CDC.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/LUFA/Drivers/USB/Class/Device/CDC.c b/LUFA/Drivers/USB/Class/Device/CDC.c index 453d21d841..026ac269af 100644 --- a/LUFA/Drivers/USB/Class/Device/CDC.c +++ b/LUFA/Drivers/USB/Class/Device/CDC.c @@ -128,11 +128,6 @@ void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) { if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)) return; - - Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber); - - if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint())) - Endpoint_ClearOUT(); CDC_Device_Flush(CDCInterfaceInfo); } @@ -222,19 +217,24 @@ uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterface } } -uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) +int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) { + uint8_t ReceivedByte = -1; + if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)) return 0; Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber); - uint8_t DataByte = Endpoint_Read_Byte(); + if (!(Endpoint_IsOUTReceived())) + return -1; + else if (Endpoint_BytesInEndpoint()) + ReceivedByte = Endpoint_Read_Byte(); if (!(Endpoint_BytesInEndpoint())) Endpoint_ClearOUT(); - - return DataByte; + + return ReceivedByte; } void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) @@ -282,24 +282,28 @@ static int CDC_Device_putchar(char c, static int CDC_Device_getchar(FILE* Stream) { - if (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)))) + int16_t ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)); + + if (ReceivedByte < 0) return _FDEV_EOF; - return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)); + return ReceivedByte; } static int CDC_Device_getchar_Blocking(FILE* Stream) { - while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)))) + int16_t ReceivedByte; + + while ((ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))) < 0) { if (USB_DeviceState == DEVICE_STATE_Unattached) return _FDEV_EOF; CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)); - USB_USBTask(); + USB_USBTask(); } - return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)); + return ReceivedByte; } #endif |