Add extra LUFA TAR archive export exclusions.

[pub/USBasp.git] / Projects / XPLAINBridge / XPLAINBridge.c

diff --git a/Projects/XPLAINBridge/XPLAINBridge.c b/Projects/XPLAINBridge/XPLAINBridge.c
index 24aa383..bee770a 100644 (file)
--- a/Projects/XPLAINBridge/XPLAINBridge.c
+++ b/Projects/XPLAINBridge/XPLAINBridge.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
 /*
              LUFA Library

-     Copyright (C) Dean Camera, 2010.
+     Copyright (C) Dean Camera, 2012.

 
   dean [at] fourwalledcubicle [dot] com
 
   dean [at] fourwalledcubicle [dot] com

-      www.fourwalledcubicle.com
+           www.lufa-lib.org

 */
 
 /*
 */
 
 /*

-  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2012  Dean Camera (dean [at] fourwalledcubicle [dot] com)

 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted


@@ -31,7 +31,7 @@
 /** \file
  *
  *  Main source file for the XPLAINBridge project. This file contains the main tasks of
 /** \file
  *
  *  Main source file for the XPLAINBridge project. This file contains the main tasks of

- *  the demo and is responsible for the initial application hardware configuration.
+ *  the project and is responsible for the initial application hardware configuration.

  */
 
 #include "XPLAINBridge.h"
  */
 
 #include "XPLAINBridge.h"


@@ -64,10 +64,16 @@ USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
        };
 
 /** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
        };
 
 /** Circular buffer to hold data from the host before it is sent to the device via the serial port. */

-RingBuff_t USBtoUART_Buffer;
+RingBuffer_t   USBtoUART_Buffer;
+
+/** Underlying data buffer for \ref USBtoUART_Buffer, where the stored bytes are located. */
+static uint8_t USBtoUART_Buffer_Data[128];

 
 /** Circular buffer to hold data from the serial port before it is sent to the host. */
 
 /** Circular buffer to hold data from the serial port before it is sent to the host. */

-RingBuff_t UARTtoUSB_Buffer;
+RingBuffer_t   UARTtoUSB_Buffer;
+
+/** Underlying data buffer for \ref UARTtoUSB_Buffer, where the stored bytes are located. */
+static uint8_t UARTtoUSB_Buffer_Data[128];

 
 
 /** Main program entry point. This routine contains the overall program flow, including initial
 
 
 /** Main program entry point. This routine contains the overall program flow, including initial


@@ -119,20 +125,36 @@ void UARTBridge_Task(void)
        if (USB_DeviceState != DEVICE_STATE_Configured)
          return;
 
        if (USB_DeviceState != DEVICE_STATE_Configured)
          return;
 

-       /* Read bytes from the USB OUT endpoint into the UART transmit buffer */
-       int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
-       if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUART_Buffer)))
-         RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
+       /* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+       if (!(RingBuffer_IsFull(&USBtoUART_Buffer)))
+       {
+               int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+               /* Read bytes from the USB OUT endpoint into the UART transmit buffer */
+               if (!(ReceivedByte < 0))
+                 RingBuffer_Insert(&USBtoUART_Buffer, ReceivedByte);
+       }

 
        /* Check if the UART receive buffer flush timer has expired or buffer is nearly full */
 
        /* Check if the UART receive buffer flush timer has expired or buffer is nearly full */

-       RingBuff_Count_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);
+       uint16_t BufferCount = RingBuffer_GetCount(&UARTtoUSB_Buffer);

        if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
        {
        if ((TIFR0 & (1 << TOV0)) || (BufferCount > 200))
        {

+               /* Clear flush timer expiry flag */

                TIFR0 |= (1 << TOV0);
 
                TIFR0 |= (1 << TOV0);
 

-               /* Read bytes from the UART receive buffer into the USB IN endpoint */
+               /* Read bytes from the USART receive buffer into the USB IN endpoint */

                while (BufferCount--)
                while (BufferCount--)

-                 CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&UARTtoUSB_Buffer));
+               {
+                       /* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
+                       if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
+                                                                       RingBuffer_Peek(&UARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
+                       {
+                               break;
+                       }
+
+                       /* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
+                       RingBuffer_Remove(&UARTtoUSB_Buffer);
+               }

        }
 
        CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
        }
 
        CDC_Device_USBTask(&VirtualSerial_CDC_Interface);


@@ -159,7 +181,7 @@ void SetupHardware(void)
 
        /* Enable pull-up on the JTAG TDI pin so we can use it to select the mode */
        PORTF |= (1 << 7);
 
        /* Enable pull-up on the JTAG TDI pin so we can use it to select the mode */
        PORTF |= (1 << 7);

-       _delay_ms(10);
+       Delay_MS(10);

 
        /* Select the firmware mode based on the JTD pin's value */
        CurrentFirmwareMode = (PINF & (1 << 7)) ? MODE_USART_BRIDGE : MODE_PDI_PROGRAMMER;
 
        /* Select the firmware mode based on the JTD pin's value */
        CurrentFirmwareMode = (PINF & (1 << 7)) ? MODE_USART_BRIDGE : MODE_PDI_PROGRAMMER;


@@ -183,8 +205,8 @@ void EVENT_USB_Device_ConfigurationChanged(void)
                TCCR0B = ((1 << CS02) | (1 << CS00));
 
                /* Initialize ring buffers used to hold serial data between USB and software UART interfaces */
                TCCR0B = ((1 << CS02) | (1 << CS00));
 
                /* Initialize ring buffers used to hold serial data between USB and software UART interfaces */

-               RingBuffer_InitBuffer(&USBtoUART_Buffer);
-               RingBuffer_InitBuffer(&UARTtoUSB_Buffer);
+               RingBuffer_InitBuffer(&USBtoUART_Buffer, USBtoUART_Buffer_Data, sizeof(USBtoUART_Buffer_Data));
+               RingBuffer_InitBuffer(&UARTtoUSB_Buffer, UARTtoUSB_Buffer_Data, sizeof(UARTtoUSB_Buffer_Data));

 
                /* Start the software USART */
                SoftUART_Init();
 
                /* Start the software USART */
                SoftUART_Init();


@@ -206,8 +228,8 @@ void EVENT_USB_Device_ConfigurationChanged(void)
        LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 }
 
        LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 }
 

-/** Event handler for the library USB Unhandled Control Request event. */
-void EVENT_USB_Device_UnhandledControlRequest(void)
+/** Event handler for the library USB Control Request reception event. */
+void EVENT_USB_Device_ControlRequest(void)

 {
        if (CurrentFirmwareMode == MODE_USART_BRIDGE)
          CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 {
        if (CurrentFirmwareMode == MODE_USART_BRIDGE)
          CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);