/** * \file * <!-- * This file is part of BeRTOS. * * Bertos 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * As a special exception, you may use this file as part of a free software * library without restriction. Specifically, if other files instantiate * templates or use macros or inline functions from this file, or you compile * this file and link it with other files to produce an executable, this * file does not by itself cause the resulting executable to be covered by * the GNU General Public License. This exception does not however * invalidate any other reasons why the executable file might be covered by * the GNU General Public License. * * Copyright 2005 Develer S.r.l. (http://www.develer.com/) * * --> * * \brief I2C generic driver functions (implementation). * * \author Francesco Sacchi <batt@develer.com> */ #include "i2c.h" #include "cfg/cfg_i2c.h" #if !CONFIG_I2C_DISABLE_OLD_API I2c local_i2c_old_api; /** * Send a sequence of bytes in master transmitter mode * to the selected slave device through the I2C bus. * * \return true on success, false on error. */ bool i2c_send(const void *_buf, size_t count) { const uint8_t *buf = (const uint8_t *)_buf; while (count--) { if (!i2c_put(*buf++)) return false; } return true; } /** * Receive a sequence of one or more bytes from the * selected slave device in master receive mode through * the I2C bus. * * Received data is placed in \c buf. * * \note a NACK is automatically given on the last received * byte. * * \return true on success, false on error */ bool i2c_recv(void *_buf, size_t count) { uint8_t *buf = (uint8_t *)_buf; while (count--) { /* * The last byte read does not has an ACK * to stop communication. */ int c = i2c_get(count); if (c == EOF) return false; else *buf++ = c; } return true; } #endif /* !CONFIG_I2C_DISABLE_OLD_API */ void i2c_genericWrite(struct I2c *i2c, const void *_buf, size_t count) { const uint8_t *buf = (const uint8_t *)_buf; while (count--) i2c_putc(i2c, *buf++); } void i2c_genericRead(struct I2c *i2c, void *_buf, size_t count) { uint8_t *buf = (uint8_t *)_buf; while (count--) *buf++ = i2c_getc(i2c); }