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
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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 2009 Develer S.r.l. (http://www.develer.com/)
36 * The SIPO module transforms a serial input in a parallel output. Please check hw_sipo.h
37 * file to customize hardware related parameters.
39 * \author Andrea Grandi <andrea@develer.com>
40 * \author Daniele Basile <asterix@develer.com>
45 #include "hw/hw_sipo.h"
46 #include "cfg/cfg_sipo.h"
48 #define LOG_LEVEL SIPO_LOG_LEVEL
49 #define LOG_FORMAT SIPO_LOG_FORMAT
51 #include <cfg/compiler.h>
58 #define SIPO_DATAORDER_START(order) (order ? SIPO_DATAORDER_START_LSB : SIPO_DATAORDER_START_MSB)
59 #define SIPO_DATAORDER_SHIFT(shift, order) (order ? ((shift) <<= 1) : ((shift) >>= 1))
62 * Write a char in sipo shift register
64 INLINE void sipo_putchar(uint8_t c, uint8_t bit_order, uint8_t clock_pol)
66 uint8_t shift = SIPO_DATAORDER_START(bit_order);
68 for(int i = 0; i < 8; i++)
75 SIPO_SI_CLOCK(clock_pol);
77 SIPO_DATAORDER_SHIFT(shift, bit_order);
82 #if !CONFIG_SIPO_DISABLE_OLD_API
84 * Write a buffer into the sipo register and, when finished, give a load pulse.
86 static size_t sipo_write(struct KFile *_fd, const void *_buf, size_t size)
88 const uint8_t *buf = (const uint8_t *)_buf;
89 Sipo *fd = SIPO_CAST(_fd);
90 size_t write_len = size;
95 SIPO_SET_CLK_LEVEL(fd->clock_pol);
96 SIPO_SET_LD_LEVEL(fd->load_device, fd->load_pol);
98 // Load into the shift register all the buffer bytes
100 sipo_putchar(*buf++, fd->bit_order, fd->clock_pol);
102 // We finsh to load bytes, so load it.
103 SIPO_LOAD(fd->load_device, fd->load_pol);
111 * Write a buffer into the sipo register and, when finished, give a load pulse.
113 static size_t sipo_write(struct KFile *_fd, const void *_buf, size_t size)
115 const uint8_t *buf = (const uint8_t *)_buf;
116 Sipo *fd = SIPO_CAST(_fd);
117 size_t write_len = size;
122 SIPO_SET_CLK_LEVEL(fd->settings & SIPO_CLOCK_POL);
123 SIPO_SET_LD_LEVEL(fd->device, fd->settings & SIPO_LOAD_LEV);
125 // Load into the shift register all the buffer bytes
127 sipo_putchar(*buf++, fd->settings & SIPO_DATAORDER,
128 fd->settings & SIPO_CLOCK_POL);
130 // We finsh to load bytes, so load it.
131 SIPO_LOAD(fd->device, fd->settings & SIPO_LOAD_LEV);
138 INLINE void init(Sipo *fd)
142 //Set kfile struct type as a generic kfile structure.
143 DB(fd->fd._type = KFT_SIPO);
145 // Set up SIPO writing functions.
146 fd->fd.write = sipo_write;
150 /* Enable sipo output */
155 * Initialize the SIPO
157 #if !CONFIG_SIPO_DISABLE_OLD_API
159 void sipo_init_1(Sipo *fd)
165 void sipo_init_3(Sipo *fd, SipoMap dev, uint8_t settings)
167 memset(fd, 0, sizeof(fd));
168 fd->settings = settings;