/* spi_host.c */ /* avr.spi - SPI AVR module. {{{ * * 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 #include "io.h" #include "common.h" #include "modules/proto/proto.h" #include "modules/spi/spi.h" /** Spi driver context. */ static spi_t spi_global; #ifdef HOST static volatile uint8_t SPCR; static volatile uint8_t SPDR; static volatile uint8_t SPSR; #endif /** 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, spi_recv_cb_t cb, void *user_data) { SPCR = sprc; spi_global.recv_cb = cb; spi_global.recv_user_data = user_data; } /** Uninitialise the SPI module. * Unused on the target */ void spi_uninit (void) { } /** Send a data to the Slave. * \param data the data to send * \param length the length of the data in bytes. */ void spi_send(uint8_t *data, u8 length) { uint8_t i; for ( i = 0; i < length; i++) { proto_send0 (data[i]); } } /** Receive a data from the SPI bus. * \return the data received from the bus. */ uint8_t spi_recv(void) { return SPDR; } /** Return the status register from the SPI driver. * \return the status register value */ uint8_t spi_status(void) { return SPSR; } /** Function called by the interruption if an IT is requested. * */ void spi_catch_it(void) { // call the call back. (*spi_global.recv_cb) (spi_global.recv_user_data); } void proto_callback (uint8_t cmd, uint8_t size, uint8_t *args) { }