From 0c0436f47c296513dace43d3ba20e3cc36f8f527 Mon Sep 17 00:00:00 2001 From: Trygve Laugstøl Date: Sun, 25 Mar 2012 17:46:26 +0200 Subject: Board, rev A. --- firmware/LUFA/Drivers/Peripheral/Serial.h | 167 ++++++++++++++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 firmware/LUFA/Drivers/Peripheral/Serial.h (limited to 'firmware/LUFA/Drivers/Peripheral/Serial.h') diff --git a/firmware/LUFA/Drivers/Peripheral/Serial.h b/firmware/LUFA/Drivers/Peripheral/Serial.h new file mode 100644 index 0000000..9f42df6 --- /dev/null +++ b/firmware/LUFA/Drivers/Peripheral/Serial.h @@ -0,0 +1,167 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + 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 + * \brief Master include file for the USART peripheral driver. + * + * Driver for the USART subsystem on supported USB AVRs. + */ + +/** \ingroup Group_PeripheralDrivers + * @defgroup Group_Serial Serial USART Driver - LUFA/Drivers/Peripheral/Serial.h + * + * \section Sec_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - LUFA/Drivers/Peripheral/Serial.c (Makefile source module name: LUFA_SRC_SERIAL) + * + * \section Module Description + * Hardware serial USART driver. This module provides an easy to use driver for + * the setup of and transfer of data over the AVR's USART port. + * + * @{ + */ + +#ifndef __SERIAL_H__ +#define __SERIAL_H__ + + /* Includes: */ + #include + #include + #include + + #include "../../Common/Common.h" + #include "../Misc/TerminalCodes.h" + + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + /** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is + * not set. + */ + #define SERIAL_UBBRVAL(baud) ((((F_CPU / 16) + (baud / 2)) / (baud)) - 1) + + /** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is + * set. + */ + #define SERIAL_2X_UBBRVAL(baud) ((((F_CPU / 8) + (baud / 2)) / (baud)) - 1) + + /* Function Prototypes: */ + /** Transmits a given string located in program space (FLASH) through the USART. + * + * \param[in] FlashStringPtr Pointer to a string located in program space. + */ + void Serial_TxString_P(const char* FlashStringPtr) ATTR_NON_NULL_PTR_ARG(1); + + /** Transmits a given string located in SRAM memory through the USART. + * + * \param[in] StringPtr Pointer to a string located in SRAM space. + */ + void Serial_TxString(const char* StringPtr) ATTR_NON_NULL_PTR_ARG(1); + + /* Inline Functions: */ + /** Initializes the USART, ready for serial data transmission and reception. This initializes the interface to + * standard 8-bit, no parity, 1 stop bit settings suitable for most applications. + * + * \param[in] BaudRate Serial baud rate, in bits per second. + * \param[in] DoubleSpeed Enables double speed mode when set, halving the sample time to double the baud rate. + */ + static inline void Serial_Init(const uint32_t BaudRate, + const bool DoubleSpeed) + { + UBRR1 = (DoubleSpeed ? SERIAL_2X_UBBRVAL(BaudRate) : SERIAL_UBBRVAL(BaudRate)); + + UCSR1C = ((1 << UCSZ11) | (1 << UCSZ10)); + UCSR1A = (DoubleSpeed ? (1 << U2X1) : 0); + UCSR1B = ((1 << TXEN1) | (1 << RXEN1)); + + DDRD |= (1 << 3); + PORTD |= (1 << 2); + } + + /** Turns off the USART driver, disabling and returning used hardware to their default configuration. */ + static inline void Serial_ShutDown(void) + { + UCSR1B = 0; + UCSR1A = 0; + UCSR1C = 0; + + UBRR1 = 0; + + DDRD &= ~(1 << 3); + PORTD &= ~(1 << 2); + } + + /** Indicates whether a character has been received through the USART. + * + * \return Boolean true if a character has been received, false otherwise. + */ + static inline bool Serial_IsCharReceived(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE; + static inline bool Serial_IsCharReceived(void) + { + return ((UCSR1A & (1 << RXC1)) ? true : false); + } + + /** Transmits a given byte through the USART. + * + * \param[in] DataByte Byte to transmit through the USART. + */ + static inline void Serial_TxByte(const char DataByte) ATTR_ALWAYS_INLINE; + static inline void Serial_TxByte(const char DataByte) + { + while (!(UCSR1A & (1 << UDRE1))); + UDR1 = DataByte; + } + + /** Receives a byte from the USART. This function blocks until a byte has been + * received; if non-blocking behaviour is required, test for a received character + * beforehand with \ref Serial_IsCharReceived(). + * + * \return Byte received from the USART. + */ + static inline char Serial_RxByte(void) ATTR_ALWAYS_INLINE; + static inline char Serial_RxByte(void) + { + while (!(UCSR1A & (1 << RXC1))); + return UDR1; + } + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ + -- cgit v1.2.3