diff options
Diffstat (limited to 'firmwares/arduino-usbserial/Arduino-usbserial.c')
| -rwxr-xr-x | firmwares/arduino-usbserial/Arduino-usbserial.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/firmwares/arduino-usbserial/Arduino-usbserial.c b/firmwares/arduino-usbserial/Arduino-usbserial.c new file mode 100755 index 0000000..181ffc7 --- /dev/null +++ b/firmwares/arduino-usbserial/Arduino-usbserial.c @@ -0,0 +1,255 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2010 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
+ without fee, 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 Arduino-usbserial project. This file contains the main tasks of
+ * the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "Arduino-usbserial.h"
+
+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
+RingBuff_t USBtoUSART_Buffer;
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+RingBuff_t USARTtoUSB_Buffer;
+
+/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */
+volatile struct
+{
+ uint8_t TxLEDPulse; /**< Milliseconds remaining for data Tx LED pulse */
+ uint8_t RxLEDPulse; /**< Milliseconds remaining for data Rx LED pulse */
+ uint8_t PingPongLEDPulse; /**< Milliseconds remaining for enumeration Tx/Rx ping-pong LED pulse */
+} PulseMSRemaining;
+
+/** 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,
+ .DataINEndpointDoubleBank = false,
+
+ .DataOUTEndpointNumber = CDC_RX_EPNUM,
+ .DataOUTEndpointSize = CDC_TXRX_EPSIZE,
+ .DataOUTEndpointDoubleBank = false,
+
+ .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
+ .NotificationEndpointSize = CDC_NOTIFICATION_EPSIZE,
+ .NotificationEndpointDoubleBank = false,
+ },
+ };
+
+/** 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();
+
+ RingBuffer_InitBuffer(&USBtoUSART_Buffer);
+ RingBuffer_InitBuffer(&USARTtoUSB_Buffer);
+
+ sei();
+
+ for (;;)
+ {
+ /* Read bytes from the USB OUT endpoint into the USART transmit buffer */
+ int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+ if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUSART_Buffer)))
+ RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
+
+ /* Check if the UART receive buffer flush timer has expired or the buffer is nearly full */
+ RingBuff_Count_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
+ if ((TIFR0 & (1 << TOV0)) || (BufferCount > BUFFER_NEARLY_FULL))
+ {
+ TIFR0 |= (1 << TOV0);
+
+ if (USARTtoUSB_Buffer.Count) {
+ LEDs_TurnOnLEDs(LEDMASK_TX);
+ PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;
+ }
+
+ /* Read bytes from the USART receive buffer into the USB IN endpoint */
+ while (BufferCount--)
+ CDC_Device_SendByte(&VirtualSerial_CDC_Interface, RingBuffer_Remove(&USARTtoUSB_Buffer));
+
+ /* Turn off TX LED(s) once the TX pulse period has elapsed */
+ if (PulseMSRemaining.TxLEDPulse && !(--PulseMSRemaining.TxLEDPulse))
+ LEDs_TurnOffLEDs(LEDMASK_TX);
+
+ /* Turn off RX LED(s) once the RX pulse period has elapsed */
+ if (PulseMSRemaining.RxLEDPulse && !(--PulseMSRemaining.RxLEDPulse))
+ LEDs_TurnOffLEDs(LEDMASK_RX);
+ }
+
+ /* Load the next byte from the USART transmit buffer into the USART */
+ if (!(RingBuffer_IsEmpty(&USBtoUSART_Buffer))) {
+ Serial_TxByte(RingBuffer_Remove(&USBtoUSART_Buffer));
+
+ LEDs_TurnOnLEDs(LEDMASK_RX);
+ PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS;
+ }
+
+ 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();
+
+ /* Hardware Initialization */
+ Serial_Init(9600, false);
+ LEDs_Init();
+ USB_Init();
+
+ /* Start the flush timer so that overflows occur rapidly to push received bytes to the USB interface */
+ TCCR0B = (1 << CS02);
+
+ /* Pull target /RESET line high */
+ 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_Device_Connect(void)
+{
+
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Device_Disconnect(void)
+{
+
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+
+
+ if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
+ ;
+}
+
+/** Event handler for the library USB Unhandled Control Request event. */
+void EVENT_USB_Device_UnhandledControlRequest(void)
+{
+ CDC_Device_ProcessControlRequest(&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;
+ }
+
+ /* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
+ UCSR1B = 0;
+ UCSR1A = 0;
+ UCSR1C = 0;
+
+ /* Special case 57600 baud for compatibility with the ATmega328 bootloader. */
+ UCSR1A = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600) ? 0 : (1 << U2X1);
+ UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
+ UCSR1C = ConfigMask;
+ UBRR1 = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600)
+ ? SERIAL_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)
+ : 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
+ * for later transmission to the host.
+ */
+ISR(USART1_RX_vect, ISR_BLOCK)
+{
+ uint8_t ReceivedByte = UDR1;
+
+ if (USB_DeviceState == DEVICE_STATE_Configured)
+ RingBuffer_Insert(&USARTtoUSB_Buffer, ReceivedByte);
+}
+
+/** 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)
+{
+ bool CurrentDTRState = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR);
+
+ if (CurrentDTRState)
+ {
+ AVR_RESET_LINE_PORT &= ~AVR_RESET_LINE_MASK;
+ }
+ else
+ {
+ AVR_RESET_LINE_PORT |= AVR_RESET_LINE_MASK;
+ }
+}
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