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fspi.h

   1  /*******************************************************************************
   2     fspi.h: second SPI interface
   3     Copyright (C) 2009 Brno University of Technology,
   4                        Faculty of Information Technology
   5     Author(s): Karel Slany <slany AT fit.vutbr.cz>
   6  
   7     LICENSE TERMS
   8  
   9     Redistribution and use in source and binary forms, with or without
  10     modification, are permitted provided that the following conditions
  11     are met:
  12     1. Redistributions of source code must retain the above copyright
  13        notice, this list of conditions and the following disclaimer.
  14     2. Redistributions in binary form must reproduce the above copyright
  15        notice, this list of conditions and the following disclaimer in
  16        the documentation and/or other materials provided with the
  17        distribution.
  18     3. All advertising materials mentioning features or use of this software
  19        or firmware must display the following acknowledgement:
  20  
  21          This product includes software developed by the University of
  22          Technology, Faculty of Information Technology, Brno and its
  23          contributors.
  24  
  25     4. Neither the name of the Company nor the names of its contributors
  26        may be used to endorse or promote products derived from this
  27        software without specific prior written permission.
  28  
  29     This software or firmware is provided ``as is'', and any express or implied
  30     warranties, including, but not limited to, the implied warranties of
  31     merchantability and fitness for a particular purpose are disclaimed.
  32     In no event shall the company or contributors be liable for any
  33     direct, indirect, incidental, special, exemplary, or consequential
  34     damages (including, but not limited to, procurement of substitute
  35     goods or services; loss of use, data, or profits; or business
  36     interruption) however caused and on any theory of liability, whether
  37     in contract, strict liability, or tort (including negligence or
  38     otherwise) arising in any way out of the use of this software, even
  39     if advised of the possibility of such damage.
  40  
  41     $Id$
  42  
  43  
  44  *******************************************************************************/
  45  
  46  #ifndef _FSPI_H_
  47  #define _FSPI_H_
  48  
  49  #include <fitkitlib.h>
  50  
  51  // fast SPI interface connected to FPGA
  52  #define FSPI_DO BIT1        ///< master DO
  53  #define FSPI_DI BIT2        ///< master DI
  54  #define FSPI_CLK BIT3       ///< master clock out
  55  #define SAMPLE_VALID BIT7
  56  
  57  #define FSPI_PORT_DIR P3DIR ///< direct port
  58  #define FSPI_PORT_IN P3IN   ///< input port
  59  #define FSPI_PORT_OUT P3OUT ///< output port
  60  #define FSPI_PORT_SEL P3SEL ///< select port
  61  
  62  #if defined MSP_16X
  63   #define FSPI_RX_BUF U0RXBUF
  64   #define FSPI_TX_BUF U0TXBUF
  65   #define FSPI_BUSY ((TXEPT & U0TCTL) == 0)
  66  #elif defined MSP_261X
  67   #define FSPI_RX_BUF UCB0RXBUF
  68   #define FSPI_TX_BUF UCB0TXBUF
  69   #define FSPI_BUSY ((UCBUSY & UCB0STAT) != 0)
  70  #else
  71   #error "FSPI define"
  72  #endif
  73  
  74  
  75  /**
  76   \brief SPI initialization
  77   **/
  78  void FSPI_Init(void);
  79  
  80  /**
  81   \brief Disables SPI
  82   **/
  83  void FSPI_Close(void);
  84  
  85  /**
  86   \Brief Sends and receives 16bits over spi
  87   **/
  88  inline unsigned int FSPI_write_wait_read(unsigned int datain);
  89  
  90  #endif /* _FSPI_H_ */
  91