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Diffstat (limited to 'Projects/Benito/Benito.c')
| -rw-r--r-- | Projects/Benito/Benito.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/Projects/Benito/Benito.c b/Projects/Benito/Benito.c new file mode 100644 index 000000000..ba8053473 --- /dev/null +++ b/Projects/Benito/Benito.c @@ -0,0 +1,230 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, provided that the above copyright notice appear in 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
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ *
+ * Main source file for the Benito project. This file contains the main tasks of
+ * the demo and is responsible for the initial application hardware configuration.
+ */
+
+#include "Benito.h"
+
+volatile uint8_t ResetPulseMSRemaining = 0;
+volatile uint8_t TxPulseMSRemaining = 0;
+volatile uint8_t RxPulseMSRemaining = 0;
+
+/** 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 =
+ {
+ .ControlInterfaceNumber = 0,
+
+ .DataINEndpointNumber = CDC_TX_EPNUM,
+ .DataINEndpointSize = CDC_TXRX_EPSIZE,
+
+ .DataOUTEndpointNumber = CDC_RX_EPNUM,
+ .DataOUTEndpointSize = CDC_TXRX_EPSIZE,
+
+ .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
+ .NotificationEndpointSize = CDC_NOTIFICATION_EPSIZE,
+ },
+
+ .State =
+ {
+ // Leave all state values to their defaults
+ }
+ };
+
+/** Main program entry point. This routine contains the overall program flow, including initial
+ * setup of all components and the main program loop.
+ */
+int main(void)
+{
+ SetupHardware();
+
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+
+ for (;;)
+ {
+ /* Echo bytes from the host to the target via the hardware USART */
+ if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
+ {
+ Serial_TxByte(CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
+
+ LEDs_TurnOnLEDs(LEDMASK_TX);
+ TxPulseMSRemaining = TX_RX_LED_PULSE_MS;
+ }
+
+ /* Echo bytes from the target to the host via the virtual serial port */
+ if (Serial_IsCharReceived())
+ {
+ CDC_Device_SendByte(&VirtualSerial_CDC_Interface, Serial_RxByte());
+
+ LEDs_TurnOnLEDs(LEDMASK_RX);
+ RxPulseMSRemaining = TX_RX_LED_PULSE_MS;
+ }
+
+ /* Check if the millisecond timer has elapsed */
+ if (TIFR0 & (1 << OCF0A))
+ {
+ /* Check if the reset pulse period has elapsed, if so tristate the target reset line */
+ if (ResetPulseMSRemaining && !(--ResetPulseMSRemaining))
+ {
+ AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;
+ AVR_RESET_LINE_DDR &= ~AVR_RESET_LINE_MASK;
+ }
+
+ /* Turn off TX LED(s) once the TX pulse period has elapsed */
+ if (TxPulseMSRemaining && !(--TxPulseMSRemaining))
+ LEDs_TurnOffLEDs(LEDMASK_TX);
+
+ /* Turn off RX LED(s) once the RX pulse period has elapsed */
+ if (RxPulseMSRemaining && !(--RxPulseMSRemaining))
+ LEDs_TurnOffLEDs(LEDMASK_RX);
+
+ /* Clear the millisecond timer CTC flag (cleared by writing logic one to the register) */
+ TIFR0 |= (1 << OCF0A);
+ }
+
+ CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+ USB_USBTask();
+ }
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+ /* Disable watchdog if enabled by bootloader/fuses */
+ MCUSR &= ~(1 << WDRF);
+ wdt_disable();
+
+ /* Disable clock division */
+ clock_prescale_set(clock_div_1);
+
+ /* Hardware Initialization */
+ LEDs_Init();
+ USB_Init();
+
+ /* Millisecond Timer Interrupt */
+ 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;
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Connect(void)
+{
+ LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Disconnect(void)
+{
+ LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_ConfigurationChanged(void)
+{
+ LEDs_SetAllLEDs(LEDMASK_USB_READY);
+
+ if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
+ LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the library USB Unhandled Control Packet event. */
+void EVENT_USB_UnhandledControlPacket(void)
+{
+ CDC_Device_ProcessControlPacket(&VirtualSerial_CDC_Interface);
+}
+
+/** Event handler for the CDC Class driver Line Encoding Changed event.
+ *
+ * \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
+{
+ uint8_t ConfigMask = 0;
+
+ switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
+ {
+ case CDC_PARITY_Odd:
+ ConfigMask = ((1 << UPM11) | (1 << UPM10));
+ break;
+ case CDC_PARITY_Even:
+ ConfigMask = (1 << UPM11);
+ break;
+ }
+
+ if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
+ ConfigMask |= (1 << USBS1);
+
+ switch (CDCInterfaceInfo->State.LineEncoding.DataBits)
+ {
+ case 6:
+ ConfigMask |= (1 << UCSZ10);
+ break;
+ case 7:
+ ConfigMask |= (1 << UCSZ11);
+ break;
+ case 8:
+ ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
+ break;
+ }
+
+ UCSR1A = (1 << U2X1);
+ UCSR1B = ((1 << TXEN1) | (1 << RXEN1));
+ UCSR1C = ConfigMask;
+ UBRR1 = SERIAL_2X_UBBRVAL((uint16_t)CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
+}
+
+/** Event handler for the CDC Class driver Host-to-Device Line Encoding Changed event.
+ *
+ * \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
+{
+ /* Check if the DTR line has been asserted - if so, start the target AVR's reset pulse */
+ if (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR)
+ {
+ AVR_RESET_LINE_DDR |= AVR_RESET_LINE_MASK;
+ AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;
+
+ ResetPulseMSRemaining = AVR_RESET_PULSE_MS;
+ }
+}
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