/*
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*********************************************************************************************************
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* AR100 SYSTEM
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* AR100 Software System Develop Kits
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* twi module
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*
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* (c) Copyright 2012-2016, Sunny China
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* All Rights Reserved
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*
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* File : twi.h
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* By : Sunny
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* Version : v1.0
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* Date : 2012-5-18
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* Descript: twi controller public header.
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* Update : date auther ver notes
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* 2012-5-18 9:40:41 Sunny 1.0 Create this file.
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*********************************************************************************************************
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*/
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#ifndef __TWI_H__
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#define __TWI_H__
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/*
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*********************************************************************************************************
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* INITIALIZE TWI
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*
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* Description: initialize twi module.
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*
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* Arguments : none.
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*
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* Returns : OK if initialize twi succeeded, others if failed.
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*********************************************************************************************************
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*/
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s32 twi_init(void);
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/*
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*********************************************************************************************************
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* EXIT TWI
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*
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* Description: exit twi module.
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*
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* Arguments : none.
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*
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* Returns : OK if exit twi succeeded, others if failed.
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*********************************************************************************************************
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*/
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s32 twi_exit(void);
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/*
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*********************************************************************************************************
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* READ DATA BY TWI
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*
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* Description: read data by twi.
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*
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* Arguments : addr : the point of address, size is specified by len.
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* data : the point of data, size is specified by len.
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* len : the length of data.
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*
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* Returns : OK if read data succeeded, others if failed.
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*********************************************************************************************************
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*/
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s32 twi_read(u32 devaddr, u8 *addr, u8 *data, u32 len);
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/*
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*********************************************************************************************************
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* WRITE DATA BY TWI
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*
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* Description: write data by twi.
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*
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* Arguments : addr : the point of address, size is specified by len.
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* data : the point of data, size is specified by len.
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* len : the length of data.
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*
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* Returns : OK if write data succeeded, others if failed.
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*********************************************************************************************************
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*/
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s32 twi_write(u32 devaddr, u8 *addr, u8 *data, u32 len);
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bool is_twi_lock(void);
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extern int twi_send_clk_9pulse(void);
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extern s32 twi_get_status(void);
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extern s32 twi_clkchangecb(u32 command, u32 freq);
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s32 twi_standby_init(void);
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s32 twi_standby_exit(void);
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#endif /* __TWI_H__ */
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