72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*
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* Copyright 2012 Michael Ossmann <mike@ossmann.com>
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* Copyright 2012 Jared Boone <jared@sharebrained.com>
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*
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* This file is part of HackRF.
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*
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* This program 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, or (at your option)
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "si5351c_drv.h"
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#include <libopencm3/lpc43xx/i2c.h>
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#define SI5351C_I2C_ADDR (0x60 << 1)
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/* FIXME return i2c0 status from each function */
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/* write to single register */
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void si5351c_write_single(si5351c_driver_t* const drv, uint8_t reg, uint8_t val)
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{
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const uint8_t data_tx[] = { reg, val };
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si5351c_write(drv, data_tx, 2);
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}
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/* read single register */
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uint8_t si5351c_read_single(si5351c_driver_t* const drv, uint8_t reg)
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{
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uint8_t val;
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/* set register address with write */
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i2c0_tx_start();
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i2c0_tx_byte((drv->i2c_address << 1) | I2C_WRITE);
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i2c0_tx_byte(reg);
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/* read the value */
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i2c0_tx_start();
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i2c0_tx_byte((drv->i2c_address << 1) | I2C_READ);
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val = i2c0_rx_byte();
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i2c0_stop();
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return val;
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}
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/*
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* Write to one or more contiguous registers. data[0] should be the first
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* register number, one or more values follow.
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*/
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void si5351c_write(si5351c_driver_t* const drv, const uint8_t* const data, const size_t data_count)
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{
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uint_fast8_t i;
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i2c0_tx_start();
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i2c0_tx_byte((drv->i2c_address << 1) | I2C_WRITE);
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for (i = 0; i < data_count; i++)
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i2c0_tx_byte(data[i]);
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i2c0_stop();
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}
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