111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/*
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Copyright 2007, Freie Universitaet Berlin. All rights reserved.
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These sources were developed at the Freie Universität Berlin, Computer
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Systems and Telematics group.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Freie Universitaet Berlin (FUB) nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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This software is provided by FUB and the contributors on an "as is"
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basis, without any representations or warranties of any kind, express
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or implied including, but not limited to, representations or
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warranties of non-infringement, merchantability or fitness for a
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particular purpose. In no event shall FUB or contributors be liable
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for any direct, indirect, incidental, special, exemplary, or
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consequential damages (including, but not limited to, procurement of
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substitute goods or services; loss of use, data, or profits; or
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business interruption) however caused and on any theory of liability,
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whether in contract, strict liability, or tort (including negligence
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or otherwise) arising in any way out of the use of this software, even
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if advised of the possibility of such damage.
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This implementation was developed by the CST group at the FUB.
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For documentation and questions please use the web site
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http://scatterweb.mi.fu-berlin.de and the mailinglist
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scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
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Berlin, 2007
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*/
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/**
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* @addtogroup interfaces
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* @{ */
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/**
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* @defgroup uart1 UART1
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* The UART module multiplexes differenct protocol on the MSB's UART1
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* interface. Currently RS232 and SPI are supported.
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* @{
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*/
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/**
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* \file Header file for for the MSB430 UART driver.
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* \author Michael Baar <baar@inf.fu-berlin.de>
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*/
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#ifndef MSB430_UART1_H
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#define MSB430_UART1_H
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#define UART_RX RXBUF1
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#define UART_TX TXBUF1
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#define UART_RESET_RX() do { U1IFG &= ~URXIFG1; } while(0)
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#define UART_RESET_RXTX() do { U1IFG &= ~(URXIFG1 | UTXIFG1); } while(0)
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#define UART_WAIT_RX() while((U1IFG & URXIFG1) == 0) { _NOP(); }
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#define UART_WAIT_TX() while((U1IFG & UTXIFG1) == 0) { _NOP(); }
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#define UART_WAIT_TXDONE() while((UTCTL1 & TXEPT) == 0) { _NOP(); }
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/**
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* @brief Operating state
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*/
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extern volatile unsigned char uart_mode;
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extern volatile unsigned char uart_lockcnt;
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/**
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* @name UART mode flags
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* @{
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*/
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#define UART_MODE_RS232 (0x00u) ///< RS232 mode
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#define UART_MODE_SPI (0x01u) ///< SPI mode
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#define UART_MODE_DEFAULT UART_MODE_RS232
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#define UART_NUM_MODES (UART_MODE_SPI + 1) ///< Highest mode number
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#define UART_MODE_RESET (0xFFu) ///< reset with current settings
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/** @} */
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#define UART_WAIT_LOCK(x) ((uart_mode != x) && (uart_lockcnt))
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#define UART_MODE_IS(x) (uart_mode == x)
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typedef int(*uart_handler_t)(unsigned char);
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/**
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* \brief Initialize the UART module
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*
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* This function is called from the boot up code to
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* initalize the UART module.
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*/
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void uart_init(void);
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void uart_set_speed(unsigned, unsigned, unsigned, unsigned);
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void uart_set_handler(unsigned, uart_handler_t);
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int uart_lock(unsigned);
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int uart_lock_wait(unsigned);
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int uart_unlock(unsigned);
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void uart_set_mode(unsigned);
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int uart_get_mode(void);
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#endif /* !MSB430_UART1_H */
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/** @} */
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/** @} */
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