4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2003, 2004, 2006 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 2000 Bernie Innocenti <bernie@codewiz.org>
34 * \brief Emulated SPI driver.
38 * \author Francesco Sacchi <batt@develer.com>
39 * \author Daniele Basile <asterix@develer.com>
41 * $WIZ$ module_name = "spi_bitbang"
42 * $WIZ$ module_configuration = "bertos/cfg/cfg_spi_bitbang.h"
43 * $WIZ$ module_hw = "bertos/hw/hw_spi.h"
47 #ifndef DRV_SPI_BITBANG_H
48 #define DRV_SPI_BITBANG_H
50 #include "cfg/cfg_spi_bitbang.h"
52 #include <cfg/compiler.h>
55 * Define send and receive order bit.
57 * $WIZ$ ordet_bit_list = "SPI_LSB_FIRST", "SPI_MSB_FIRST"
59 #define SPI_LSB_FIRST 1
60 #define SPI_MSB_FIRST 2
62 #if CONFIG_SPI_DATAORDER == SPI_LSB_FIRST
63 #define SPI_DATAORDER_START 1
64 #define SPI_DATAORDER_SHIFT(i) ((i) <<= 1)
65 #elif CONFIG_SPI_DATAORDER == SPI_MSB_FIRST
66 #define SPI_DATAORDER_START 0x80
67 #define SPI_DATAORDER_SHIFT(i) ((i) >>= 1)
70 void spi_write(const void *buf, size_t len);
71 void spi_read(void *buf, size_t len);
72 uint8_t spi_sendRecv(uint8_t c);
74 void spi_assertSS(void);
75 void spi_deassertSS(void);
77 #endif /* DRV_SPI_BITBANG_H */