diff -r b584642d4f58 -r b373b0288715 sanguino/firmwares/arduino-usbserial/Arduino-usbserial.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sanguino/firmwares/arduino-usbserial/Arduino-usbserial.c Thu Jul 07 12:23:34 2016 +0200 @@ -0,0 +1,242 @@ +/* + 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 (;;) + { + /* Only try to read in bytes from the CDC interface if the transmit buffer is not full */ + if (!(RingBuffer_IsFull(&USBtoUSART_Buffer))) + { + int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface); + + /* Read bytes from the USB OUT endpoint into the USART transmit buffer */ + if (!(ReceivedByte < 0)) + 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 Configuration Changed event. */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ + 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. */ + UBRR1 = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600) + ? SERIAL_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS) + : SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS); + + UCSR1C = ConfigMask; + UCSR1A = (CDCInterfaceInfo->State.LineEncoding.BaudRateBPS == 57600) ? 0 : (1 << U2X1); + UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1)); +} + +/** 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; +}