Remove internal USB_Device_NibbleToASCII() function in favour of manually inlined...

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

diff --git a/Projects/Benito/Benito.c b/Projects/Benito/Benito.c
index 32c663c..0e6eacb 100644 (file)
--- a/Projects/Benito/Benito.c
+++ b/Projects/Benito/Benito.c
@@ -1,21 +1,21 @@
 /*
              LUFA Library
      Copyright (C) Dean Camera, 2010.
 /*
              LUFA Library
      Copyright (C) Dean Camera, 2010.

-              
+

   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 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 

-  Permission to use, copy, modify, distribute, and sell this 
+  Permission to use, copy, modify, distribute, and sell this

   software and its documentation for any purpose is hereby granted
   software and its documentation for any purpose is hereby granted

-  without fee, provided that the above copyright notice appear in 
+  without fee, provided that the above copyright notice appear in

   all copies and that both that the copyright notice and this
   all copies and that both that the copyright notice and this

-  permission notice and warranty disclaimer appear in supporting 
-  documentation, and that the name of the author not be used in 
-  advertising or publicity pertaining to distribution of the 
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the

   software without specific, written prior permission.
 
   The author disclaim all warranties with regard to this
   software without specific, written prior permission.
 
   The author disclaim all warranties with regard to this


@@ -51,13 +51,16 @@ volatile struct
 /** Previous state of the virtual DTR control line from the host */
 bool PreviousDTRState = false;
 
 /** Previous state of the virtual DTR control line from the host */
 bool PreviousDTRState = false;
 

+/** Milliseconds remaining until the receive buffer is flushed to the USB host */
+uint8_t FlushPeriodRemaining = RECEIVE_BUFFER_FLUSH_MS;
+

 /** LUFA CDC Class driver interface configuration and state information. This structure is
  *  passed to all CDC Class driver functions, so that multiple instances of the same class
  *  within a device can be differentiated from one another.
  */
 USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
        {
 /** LUFA CDC Class driver interface configuration and state information. This structure is
  *  passed to all CDC Class driver functions, so that multiple instances of the same class
  *  within a device can be differentiated from one another.
  */
 USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
        {

-               .Config = 
+               .Config =

                        {
                                .ControlInterfaceNumber         = 0,
 
                        {
                                .ControlInterfaceNumber         = 0,
 


@@ -81,31 +84,23 @@ USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
 int main(void)
 {
        SetupHardware();
 int main(void)
 {
        SetupHardware();

-       
+

        RingBuffer_InitBuffer(&Tx_Buffer);
        RingBuffer_InitBuffer(&Tx_Buffer);

-       
+

        sei();
 
        for (;;)
        {
                /* Echo bytes from the host to the target via the hardware USART */
        sei();
 
        for (;;)
        {
                /* Echo bytes from the host to the target via the hardware USART */

-               while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface) > 0)
+               int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+               if (!(ReceivedByte < 0) && (UCSR1A & (1 << UDRE1)))

                {
                {

-                       Serial_TxByte(CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
+                       UDR1 = ReceivedByte;

 
                        LEDs_TurnOnLEDs(LEDMASK_TX);
 
                        LEDs_TurnOnLEDs(LEDMASK_TX);

-                       PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;                       
+                       PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;

                }
                }

-               
-               /* Echo bytes from the target to the host via the virtual serial port */
-               while (Tx_Buffer.Count)
-               {
-                       CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_AtomicRemove(&Tx_Buffer));

 
 

-                       LEDs_TurnOnLEDs(LEDMASK_RX);
-                       PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
-               }
-               

                /* Check if the millisecond timer has elapsed */
                if (TIFR0 & (1 << OCF0A))
                {
                /* Check if the millisecond timer has elapsed */
                if (TIFR0 & (1 << OCF0A))
                {


@@ -115,14 +110,14 @@ int main(void)
                                LEDs_TurnOffLEDs(LEDMASK_BUSY);
                                AVR_RESET_LINE_DDR &= ~AVR_RESET_LINE_MASK;
                        }
                                LEDs_TurnOffLEDs(LEDMASK_BUSY);
                                AVR_RESET_LINE_DDR &= ~AVR_RESET_LINE_MASK;
                        }

-                       
+

                        /* Check if the LEDs should be ping-ponging (during enumeration) */
                        if (PulseMSRemaining.PingPongLEDPulse && !(--PulseMSRemaining.PingPongLEDPulse))
                        {
                                LEDs_ToggleLEDs(LEDMASK_TX | LEDMASK_RX);
                                PulseMSRemaining.PingPongLEDPulse = PING_PONG_LED_PULSE_MS;
                        }
                        /* Check if the LEDs should be ping-ponging (during enumeration) */
                        if (PulseMSRemaining.PingPongLEDPulse && !(--PulseMSRemaining.PingPongLEDPulse))
                        {
                                LEDs_ToggleLEDs(LEDMASK_TX | LEDMASK_RX);
                                PulseMSRemaining.PingPongLEDPulse = PING_PONG_LED_PULSE_MS;
                        }

-               
+

                        /* Turn off TX LED(s) once the TX pulse period has elapsed */
                        if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))
                          LEDs_TurnOffLEDs(LEDMASK_TX);
                        /* Turn off TX LED(s) once the TX pulse period has elapsed */
                        if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))
                          LEDs_TurnOffLEDs(LEDMASK_TX);


@@ -131,10 +126,27 @@ int main(void)
                        if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))
                          LEDs_TurnOffLEDs(LEDMASK_RX);
 
                        if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))
                          LEDs_TurnOffLEDs(LEDMASK_RX);
 

+                       /* Check if the receive buffer flush period has expired */
+                       RingBuff_Count_t BufferCount = RingBuffer_GetCount(&Tx_Buffer);
+                       if (!(--FlushPeriodRemaining) || (BufferCount > 200))
+                       {
+                               /* Echo bytes from the target to the host via the virtual serial port */
+                               if (BufferCount)
+                               {
+                                       while (BufferCount--)
+                                         CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&Tx_Buffer));
+
+                                       LEDs_TurnOnLEDs(LEDMASK_RX);
+                                       PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
+                               }
+
+                               FlushPeriodRemaining = RECEIVE_BUFFER_FLUSH_MS;
+                       }
+

                        /* Clear the millisecond timer CTC flag (cleared by writing logic one to the register) */
                        /* Clear the millisecond timer CTC flag (cleared by writing logic one to the register) */

-                       TIFR0 |= (1 << OCF0A);          
+                       TIFR0 |= (1 << OCF0A);

                }
                }

-               
+

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


@@ -148,7 +160,6 @@ void SetupHardware(void)
        wdt_disable();
 
        /* Hardware Initialization */
        wdt_disable();
 
        /* Hardware Initialization */

-       Serial_Init(9600, false);

        LEDs_Init();
        USB_Init();
 
        LEDs_Init();
        USB_Init();
 


@@ -156,7 +167,7 @@ void SetupHardware(void)
        OCR0A  = (F_CPU / 64 / 1000);
        TCCR0A = (1 << WGM01);
        TCCR0B = ((1 << CS01) | (1 << CS00));
        OCR0A  = (F_CPU / 64 / 1000);
        TCCR0A = (1 << WGM01);
        TCCR0B = ((1 << CS01) | (1 << CS00));

-       
+

        /* Tristate target /RESET Line */
        AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;
        AVR_RESET_LINE_DDR  &= ~AVR_RESET_LINE_MASK;
        /* Tristate target /RESET Line */
        AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;
        AVR_RESET_LINE_DDR  &= ~AVR_RESET_LINE_MASK;


@@ -179,15 +190,20 @@ void EVENT_USB_Device_Disconnect(void)
 /** Event handler for the library USB Configuration Changed event. */
 void EVENT_USB_Device_ConfigurationChanged(void)
 {
 /** Event handler for the library USB Configuration Changed event. */
 void EVENT_USB_Device_ConfigurationChanged(void)
 {

+       bool ConfigSuccess = true;
+
+       ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+

        PulseMSRemaining.PingPongLEDPulse = 0;
        PulseMSRemaining.PingPongLEDPulse = 0;

-       LEDs_SetAllLEDs(LEDS_NO_LEDS);

 
 

-       if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
-         LEDs_SetAllLEDs(LEDMASK_ERROR);
+       LEDs_SetAllLEDs(ConfigSuccess ? LEDS_NO_LEDS : LEDMASK_ERROR);

 }
 
 }
 

-/** Event handler for the library USB Unhandled Control Request event. */
-void EVENT_USB_Device_UnhandledControlRequest(void)
+/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
+ *  the device from the USB host before passing along unhandled control requests to the library for processing
+ *  internally.
+ */
+void EVENT_USB_Device_ControlRequest(void)

 {
        CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 }
 {
        CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 }


@@ -203,10 +219,10 @@ void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCI
        switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
        {
                case CDC_PARITY_Odd:
        switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
        {
                case CDC_PARITY_Odd:

-                       ConfigMask = ((1 << UPM11) | (1 << UPM10));             
+                       ConfigMask = ((1 << UPM11) | (1 << UPM10));

                        break;
                case CDC_PARITY_Even:
                        break;
                case CDC_PARITY_Even:

-                       ConfigMask = (1 << UPM11);              
+                       ConfigMask = (1 << UPM11);

                        break;
        }
 
                        break;
        }
 


@@ -225,11 +241,19 @@ void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCI
                        ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
                        break;
        }
                        ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
                        break;
        }

-       
+
+       /* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
+       UCSR1B = 0;
+       UCSR1A = 0;
+       UCSR1C = 0;
+
+       /* Set the new baud rate before configuring the USART */
+       UBRR1  = SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
+
+       /* Reconfigure the USART in double speed mode for a wider baud rate range at the expense of accuracy */
+       UCSR1C = ConfigMask;

        UCSR1A = (1 << U2X1);
        UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
        UCSR1A = (1 << U2X1);
        UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));

-       UCSR1C = ConfigMask;    
-       UBRR1  = SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);

 }
 
 /** ISR to manage the reception of data from the serial port, placing received bytes into a circular buffer
 }
 
 /** ISR to manage the reception of data from the serial port, placing received bytes into a circular buffer


@@ -255,10 +279,11 @@ void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const C
        if (!(PreviousDTRState) && CurrentDTRState)
        {
                LEDs_SetAllLEDs(LEDMASK_BUSY);
        if (!(PreviousDTRState) && CurrentDTRState)
        {
                LEDs_SetAllLEDs(LEDMASK_BUSY);

-       
+

                AVR_RESET_LINE_DDR |= AVR_RESET_LINE_MASK;
                PulseMSRemaining.ResetPulse = AVR_RESET_PULSE_MS;
        }
                AVR_RESET_LINE_DDR |= AVR_RESET_LINE_MASK;
                PulseMSRemaining.ResetPulse = AVR_RESET_PULSE_MS;
        }

-       
+

        PreviousDTRState = CurrentDTRState;
 }
        PreviousDTRState = CurrentDTRState;
 }

+