X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/a6e85d6ed80720e15477433f4abf0ca5f54422ba..77a9df36a77d2523dd2bc24fa17f9f04c6c175c5:/Projects/Benito/Benito.c?ds=sidebyside diff --git a/Projects/Benito/Benito.c b/Projects/Benito/Benito.c index ba8053473..2c8f2cd34 100644 --- a/Projects/Benito/Benito.c +++ b/Projects/Benito/Benito.c @@ -1,230 +1,300 @@ -/* - 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; - } -} +/* + LUFA Library + Copyright (C) Dean Camera, 2011. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2011 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 Benito project. This file contains the main tasks of + * the project and is responsible for the initial application hardware configuration. + */ + +#include "Benito.h" + +/** Circular buffer to hold data from the serial port before it is sent to the host. */ +static RingBuffer_t USARTtoUSB_Buffer; + +/** Underlying data buffer for \ref USARTtoUSB_Buffer, where the stored bytes are located. */ +static uint8_t USARTtoUSB_Buffer_Data[128]; + +/** Pulse generation counters to keep track of the number of milliseconds remaining for each pulse type */ +volatile struct +{ + uint8_t ResetPulse; /**< Milliseconds remaining for target /RESET pulse */ + 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; + +/** 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 = + { + .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(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data)); + + sei(); + + for (;;) + { + /* Echo bytes from the host to the target via the hardware USART */ + if ((UCSR1A & (1 << UDRE1)) && CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface)) + { + UDR1 = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface); + + LEDs_TurnOnLEDs(LEDMASK_TX); + PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS; + } + + /* Check if the millisecond timer has elapsed */ + if (TIFR0 & (1 << OCF0A)) + { + /* Clear flush timer expiry flag */ + TIFR0 |= (1 << TOV0); + + /* Check if the reset pulse period has elapsed, if so tristate the target reset line */ + if (PulseMSRemaining.ResetPulse && !(--PulseMSRemaining.ResetPulse)) + { + 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; + } + + /* 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); + + /* Check if the receive buffer flush period has expired */ + uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer); + if (!(--FlushPeriodRemaining) || (BufferCount > 200)) + { + FlushPeriodRemaining = RECEIVE_BUFFER_FLUSH_MS; + + /* Start RX LED indicator pulse */ + if (BufferCount) + { + LEDs_TurnOnLEDs(LEDMASK_RX); + PulseMSRemaining.RxLEDPulse = TX_RX_LED_PULSE_MS; + } + + /* Echo bytes from the target to the host via the virtual serial port */ + while (BufferCount--) + { + /* 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(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError) + { + break; + } + + /* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */ + RingBuffer_Remove(&USARTtoUSB_Buffer); + } + } + } + + 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 */ + 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_Device_Connect(void) +{ + PulseMSRemaining.PingPongLEDPulse = PING_PONG_LED_PULSE_MS; + LEDs_SetAllLEDs(LEDMASK_TX); +} + +/** Event handler for the library USB Disconnection event. */ +void EVENT_USB_Device_Disconnect(void) +{ + PulseMSRemaining.PingPongLEDPulse = 0; + LEDs_SetAllLEDs(LEDS_NO_LEDS); +} + +/** 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; + + LEDs_SetAllLEDs(ConfigSuccess ? LEDS_NO_LEDS : LEDMASK_ERROR); +} + +/** 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); +} + +/** 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; + + /* 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)); +} + +/** 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) +{ + static bool PreviousDTRState = false; + bool CurrentDTRState = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR); + + /* Check if the DTR line has been asserted - if so, start the target AVR's reset pulse */ + if (!(PreviousDTRState) && CurrentDTRState) + { + LEDs_SetAllLEDs(LEDMASK_BUSY); + + AVR_RESET_LINE_DDR |= AVR_RESET_LINE_MASK; + PulseMSRemaining.ResetPulse = AVR_RESET_PULSE_MS; + } + + PreviousDTRState = CurrentDTRState; +} +