i2c.c

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/** @addtogroup i2c_file I2C peripheral API 
 */
 
/*
 * This file is part of the libopencm3 project.
 *
 * Copyright (C) 2022 Eduard Drusa <ventyl86(at)netkosice(dot)sk>
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <libopencm3/nrf/52/i2c.h>
 
/**@{*/
 
/** Configure I2C transmit buffer properties
 *
 * Configures transmit buffer for EasyDMA transaction. This API
 * is only available if @ref I2C_MODE_MASTER mode is activated.
 *
 * Configures linear TX buffer for EasyDMA transmission.
 * @param[in] i2c i2c peripheral base, see @ref i2c_block
 * @param[in] buffer address of buffer start
 * @param[in] len length of data in the buffer
 */
void i2c_set_tx_buffer(uint32_t i2c, const uint8_t *buffer, uint8_t len)
{
        I2C_TXDPTR(i2c) = (uint32_t) buffer;
        I2C_TXDMAXCNT(i2c) = len;
        I2C_TXDLIST(i2c) = 0;
}
 
/** Configure I2C receive buffer properties
 *
 * Configures receive buffer for EasyDMA transaction. This API
 * is only available if @ref I2C_MODE_MASTER mode is activated.
 *
 * Configures linear RX buffer for EasyDMA transmission.
 * @param[in] i2c i2c peripheral base, see @ref i2c_block
 * @param[in] buffer address of buffer start
 * @param[in] len length of the buffer
 */
void i2c_set_rx_buffer(uint32_t i2c, uint8_t *buffer, uint8_t len)
{
        I2C_RXDPTR(i2c) = (uint32_t) buffer;
        I2C_RXDMAXCNT(i2c) = len;
        I2C_RXDLIST(i2c) = 0;
}
 
 
/** @} */