120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2007 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief Function library for Accessing FT245RL USB interface.
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*
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* This module handles USB communication with FT245RL chip.
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* This chip is a parallel USB interface with data flow control.
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* A kfile-like interface is supplied.
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*
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* \author Francesco Sacchi <batt@develer.com>
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*/
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#include "hw/hw_ft245rl.h"
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#include "ft245rl.h"
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#include <cfg/macros.h>
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#include <cfg/debug.h>
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#include <cfg/module.h>
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#include <drv/timer.h>
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#include <io/kfile.h>
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#include <string.h>
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MOD_DEFINE(ft245rl);
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/**
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* Read \a size bytes in buffer \a buf, from fid \a _fd.
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*/
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static size_t ft245rl_read(struct KFile *_fd, void *_buf, size_t size)
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{
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Ft245rl *fd = FT245RL_CAST(_fd);
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(void)fd; //unused
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uint8_t *buf = (uint8_t *)_buf;
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size_t total_read = 0;
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while (size--)
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{
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while(!FT245RL_DATA_RDY())
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/* busy waiy */;
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*buf++ = FT245RL_GETDATA();
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total_read++;
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}
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return total_read;
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}
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/**
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* Write \a size bytes from buffer \a buf, of fid \a _fd.
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*/
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static size_t ft245rl_write(struct KFile *_fd, const void *_buf, size_t size)
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{
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Ft245rl *fd = FT245RL_CAST(_fd);
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(void)fd; //unused
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const uint8_t *buf = (const uint8_t *)_buf;
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size_t total_write = 0;
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while (size--)
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{
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while(!FT245RL_TX_ALLOWED())
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/* busy waiy */;
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FT245RL_SETDATA(*buf++);
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total_write++;
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}
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return total_write;
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}
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/**
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* Ft245rl init function.
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*/
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void ft245rl_init(Ft245rl *fd)
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{
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memset(fd, 0, sizeof(*fd));
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DB(fd->fd._type = KFT_FT245RL);
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// Setup data ft245rl communication functions.
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fd->fd.read = ft245rl_read;
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fd->fd.write = ft245rl_write;
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FT245RL_INIT();
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while (FT245RL_DATA_RDY())
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FT245RL_GETDATA();
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MOD_INIT(ft245rl);
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}
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