#ifndef spi_h #define spi_h /* spi.h */ /* {{{ * * Copyright (C) 2008 NĂ©lio Laranjeiro * * APBTeam: * Web: http://apbteam.org/ * Email: team AT apbteam DOT org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * }}} */ #include "io.h" #define SPI_DDR DDRB #define SPI_PORT PORTB #if defined (__AVR_ATmega128__) #define SPI_BIT_SS 0 #define SPI_BIT_SCK 1 #define SPI_BIT_MOSI 2 #define SPI_BIT_MISO 3 #elif defined (__AVR_ATmega16__) #define SPI_BIT_SS 4 #define SPI_BIT_SCK 7 #define SPI_BIT_MOSI 5 #define SPI_BIT_MISO 6 #else #error "Not implemented" #endif #define SPI_IT_ENABLE _BV(SPIE) #define SPI_IT_DISABLE 0x0 #define SPI_ENABLE _BV(SPE) #define SPI_DISABLE 0x0 #define SPI_MSB_FIRST 0x00 #define SPI_LSB_FIRST _BV(DORD) #define SPI_MASTER _BV(MSTR) #define SPI_SLAVE 0x00 #define SPI_CPOL_RISING 0x0 #define SPI_CPOL_FALLING _BV(CPOL) #define SPI_CPHA_SAMPLE 0x0 #define SPI_CPHA_SETUP _BV(CPHA) enum spi_fosc_t { SPI_FOSC_DIV4, SPI_FOSC_DIV16, SPI_FOSC_DIV64, SPI_FOSC_DIV128, SPI_FOSC_DIV2, SPI_FOSC_DIV8, SPI_FOSC_DIV32 }; struct spi_t { /** interruption status. */ int8_t interruption; }; typedef struct spi_t spi_t; /** Initialise the SPI Control Register. * \param sprc the sprc register data to be store in the register. * \param cb the function call back to call the user which receive the data. * \param user_data the user data to be provieded in the function call back. */ void spi_init(uint8_t sprc); /** Uninitialise the SPI module. * Unused on the target */ void spi_uninit (void); /** Send a data to the Slave. * \param data the data to send */ void spi_send(uint8_t data); /** Receive a data from the SPI bus. * \return the data received from the bus. */ uint8_t spi_recv(void); /** Send and receive data. * \param data the data to send. * \return the data received. */ uint8_t spi_send_and_recv (uint8_t data); /** Return the status register from the SPI driver. * \return the status register value */ uint8_t spi_status(void); #endif /* spi_h */