diff options
Diffstat (limited to 'Projects/USBtoSerial/USBtoSerial.c')
| -rw-r--r-- | Projects/USBtoSerial/USBtoSerial.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/Projects/USBtoSerial/USBtoSerial.c b/Projects/USBtoSerial/USBtoSerial.c deleted file mode 100644 index 47a84a4ada..0000000000 --- a/Projects/USBtoSerial/USBtoSerial.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 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 disclaims 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 USBtoSerial project. This file contains the main tasks of - * the project and is responsible for the initial application hardware configuration. - */ - -#include "USBtoSerial.h" - -/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */ -static RingBuffer_t USBtoUSART_Buffer; - -/** Underlying data buffer for \ref USBtoUSART_Buffer, where the stored bytes are located. */ -static uint8_t USBtoUSART_Buffer_Data[128]; - -/** 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]; - -/** 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 = INTERFACE_ID_CDC_CCI, - .DataINEndpoint = - { - .Address = CDC_TX_EPADDR, - .Size = CDC_TXRX_EPSIZE, - .Banks = 1, - }, - .DataOUTEndpoint = - { - .Address = CDC_RX_EPADDR, - .Size = CDC_TXRX_EPSIZE, - .Banks = 1, - }, - .NotificationEndpoint = - { - .Address = CDC_NOTIFICATION_EPADDR, - .Size = CDC_NOTIFICATION_EPSIZE, - .Banks = 1, - }, - }, - }; - - -/** 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, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data)); - RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data)); - - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); - GlobalInterruptEnable(); - - 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); - - /* Store received byte into the USART transmit buffer */ - if (!(ReceivedByte < 0)) - RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte); - } - - uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer); - if (BufferCount) - { - Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address); - - /* Check if a packet is already enqueued to the host - if so, we shouldn't try to send more data - * until it completes as there is a chance nothing is listening and a lengthy timeout could occur */ - if (Endpoint_IsINReady()) - { - /* Never send more than one bank size less one byte to the host at a time, so that we don't block - * while a Zero Length Packet (ZLP) to terminate the transfer is sent if the host isn't listening */ - uint8_t BytesToSend = MIN(BufferCount, (CDC_TXRX_EPSIZE - 1)); - - /* Read bytes from the USART receive buffer into the USB IN endpoint */ - while (BytesToSend--) - { - /* 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); - } - } - } - - /* Load the next byte from the USART transmit buffer into the USART if transmit buffer space is available */ - if (Serial_IsSendReady() && !(RingBuffer_IsEmpty(&USBtoUSART_Buffer))) - Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer)); - - CDC_Device_USBTask(&VirtualSerial_CDC_Interface); - USB_USBTask(); - } -} - -/** Configures the board hardware and chip peripherals for the demo's functionality. */ -void SetupHardware(void) -{ -#if (ARCH == ARCH_AVR8) - /* Disable watchdog if enabled by bootloader/fuses */ - MCUSR &= ~(1 << WDRF); - wdt_disable(); - - /* Disable clock division */ - clock_prescale_set(clock_div_1); -#endif - - /* Hardware Initialization */ - LEDs_Init(); - USB_Init(); -} - -/** Event handler for the library USB Connection event. */ -void EVENT_USB_Device_Connect(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING); -} - -/** Event handler for the library USB Disconnection event. */ -void EVENT_USB_Device_Disconnect(void) -{ - LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY); -} - -/** 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); - - LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR); -} - -/** Event handler for the library USB Control Request reception event. */ -void EVENT_USB_Device_ControlRequest(void) -{ - CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface); -} - -/** 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_IsFull(&USARTtoUSB_Buffer))) - RingBuffer_Insert(&USARTtoUSB_Buffer, ReceivedByte); -} - -/** 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; - } - - /* Keep the TX line held high (idle) while the USART is reconfigured */ - PORTD |= (1 << 3); - - /* 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)); - - /* Release the TX line after the USART has been reconfigured */ - PORTD &= ~(1 << 3); -} - |