64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
#ifndef __SI570_H__
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#define __SI570_H__
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/* (C) 2005-2011 by maintech GmbH
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* (C) 2011-2012 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#define SI570_ADDR 0x55
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#define SI570_XTAL 114285000L
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struct range {
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uint32_t min;
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uint32_t max;
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};
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struct si570_info {
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struct range freq_range[3];
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uint32_t init_freq;
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};
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//device-context
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struct si570_ctx {
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int init;
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int lock;
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void *i2c;
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uint8_t slave_addr;
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uint32_t xtal;
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const struct si570_info *info;
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};
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//API
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int si570_init(struct si570_ctx *ctx, void *i2c_dev, uint8_t i2c_addr);
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int si570_reinit(struct si570_ctx *ctx);
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int si570_read_calibration(struct si570_ctx *ctx);
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int si570_reset(struct si570_ctx *ctx);
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//mode of operation
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int si570_get_lock(struct si570_ctx *ctx);
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//frequency
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int si570_set_freq(struct si570_ctx *ctx, uint32_t freq, int trim);
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//dump all registers
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void si570_regdump(struct si570_ctx *ctx);
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//write register(s)
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int si570_reg_write(struct si570_ctx *ctx, uint8_t reg, int len, const uint8_t* data);
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#endif //__SI570_H__
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