/* spi.c */ /* {{{ * * 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" #include "common.h" #include "spi.h" #define SPI_DIRVER_SIGNAL SIGNAL_SPI /** For host */ #ifdef HOST static uint8_t SPCR; static uint8_t SPDR; static uint8_t SPSR; static uint8_t SPIF; #endif /** Spi driver context. */ static spi_t spi_global; /** 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) { SPCR = sprc; spi_global.interruption = sprc >> 7; } /** Send a data to the Slave. * \param data the data to send */ void spi_send(uint8_t data) { // enables the SPI if not enabled. SPCR |= SPI_ENABLE; SPDR = data; if (!spi_global.interruption) { // Wait the end of the transmission. while(!(SPSR & (1<