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| 196 | pakoxda | 1 | /*! \file spi.h \brief SPI interface driver. */ |
| 2 | //***************************************************************************** |
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| 3 | // |
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| 4 | // File Name : 'spi.h' |
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| 5 | // Title : SPI interface driver |
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| 6 | // Author : Pascal Stang - Copyright (C) 2000-2002 |
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| 7 | // Created : 11/22/2000 |
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| 8 | // Revised : 06/06/2002 |
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| 9 | // Version : 0.6 |
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| 10 | // Target MCU : Atmel AVR series |
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| 11 | // Editor Tabs : 4 |
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| 12 | // |
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| 13 | // NOTE: This code is currently below version 1.0, and therefore is considered |
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| 14 | // to be lacking in some functionality or documentation, or may not be fully |
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| 15 | // tested. Nonetheless, you can expect most functions to work. |
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| 16 | // |
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| 17 | /// \ingroup driver_avr |
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| 18 | /// \defgroup spi SPI (Serial Peripheral Interface) Function Library (spi.c) |
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| 19 | /// \code #include "spi.h" \endcode |
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| 20 | /// \par Overview |
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| 21 | /// Provides basic byte and word transmitting and receiving via the AVR |
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| 22 | /// SPI interface. Due to the nature of SPI, every SPI communication operation |
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| 23 | /// is both a transmit and simultaneous receive. |
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| 24 | /// |
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| 25 | /// \note Currently, only MASTER mode is supported. |
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| 26 | // |
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| 27 | // This code is distributed under the GNU Public License |
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| 28 | // which can be found at http://www.gnu.org/licenses/gpl.txt |
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| 29 | // |
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| 30 | //***************************************************************************** |
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| 31 | |||
| 32 | // function prototypes |
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| 33 | |||
| 34 | |||
| 35 | extern volatile double XE,YE; |
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| 36 | extern volatile signed char nickgrad,rollgrad,nickgradkomp,rollgradkomp; |
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| 37 | extern volatile double richtungorgr,richtungorgd,nick,roll; |
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| 38 | extern volatile int iXsf,iYsf,iZsf; |
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| 39 | extern volatile signed int Xmax, Xmin, Ymax, Ymin, Zmin, Zmax; |
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| 40 | extern volatile double XrawCal, YrawCal, ZrawCal; |
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| 41 | extern volatile int Xraw, Yraw, Zraw; // save values you get from the ASIC |
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| 42 | extern volatile int Xoffset, Yoffset, Zoffset; |
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| 43 | extern volatile int azimuthgrad; |
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| 44 | extern double XEx,XEy,XEz,YEy,YEz; |
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| 45 | int MagnetG; |
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| 46 | // SPI interface initializer |
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| 47 | void spiInit(void); |
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| 48 | |||
| 49 | // spiSendByte(u08 data) waits until the SPI interface is ready |
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| 50 | // and then sends a single byte over the SPI port. This command |
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| 51 | // does not receive anything. |
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| 52 | void spiSendByte(unsigned char data); |
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| 53 | |||
| 54 | // spiTransferByte(u08 data) waits until the SPI interface is ready |
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| 55 | // and then sends a single byte over the SPI port. The function also |
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| 56 | // returns the byte that was received during transmission. |
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| 57 | unsigned char spiTransferByte(unsigned char data); |
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| 58 | |||
| 59 | // spiTransferWord(u08 data) works just like spiTransferByte but |
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| 60 | // operates on a whole word (16-bits of data). |
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| 61 | unsigned int spiTransferWord(unsigned int data); |
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| 62 | |||
| 63 | |||
| 64 | extern int KompassRead(void); |
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| 65 | extern void ReadEepromKompassValues(void); |
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| 66 |