From 4d10e19afe45695f30e7bf408757e92893f3fd2c Mon Sep 17 00:00:00 2001 From: Nélio Laranjeiro Date: Sun, 10 Feb 2008 23:07:45 +0100 Subject: SPI driver for AVR. It's only a first shoot, it has not been tested in the real AVR. --- digital/avr/modules/spi/spi.h | 79 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 digital/avr/modules/spi/spi.h (limited to 'digital/avr/modules/spi/spi.h') diff --git a/digital/avr/modules/spi/spi.h b/digital/avr/modules/spi/spi.h new file mode 100644 index 00000000..e4de8f07 --- /dev/null +++ b/digital/avr/modules/spi/spi.h @@ -0,0 +1,79 @@ +#ifndef spi_h +#define spi_h +/* spi.h */ +/* {{{ + * + * Copyright (C) 2008 Nélio 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. + * + * }}} */ + +/** Call back use to call the user function on the reception of a data. */ +typedef void (*spi_recv_cb_t) (void *user_data); + +struct spi_t +{ + /** Call back function. */ + spi_recv_cb_t recv_cb; + /** user data on data reception. */ + void *recv_user_data; +}; +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, spi_recv_cb_t cb, void *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); + +/** Receive a data from the SPI bus. + * \return the data received from the bus. + */ +uint8_t +spi_recv(void); + +/** Return the status register from the SPI driver. + * \return the status register value + */ +uint8_t +spi_status(void); + +/** Function called by the interruption if an IT is requested. + * + */ +void +spi_catch_it(void); + +#endif /* spi_h */ -- cgit v1.2.3