#include?“ads7142.h“
#include?“bsp.h“
#include?“adsxx.h“



/*
static?void?DelayNus（uint32_t?N）
{
	uint8_t?i;
??	do{
		for（i=6;i>0;i--）?//8MHZ:=7;?12MHZ:=11
			;
??	??}while（--N）;
}
*/

/**?
??*?@brief??IIC?Init?
??*?@param??None?
??*?@retval?None?
??*/?
static?void?ads7142_gpio_init（void）
{

????ADS7142_SDA_SET_OUT（）;
????ADS7142_SCL_SET（）;
????ADS7142_BSY_SET（）;
????ADS7142_CLK_SET（）;

}


/**?
??*?@brief??Set?SDA?Pin?as?Output?Mode?
??*?@param??None
??*?@retval?None?
??*/??
static?void?SDA_OUT（void）????
{????
????ADS7142_SDA_SET_OUT（）;

}????


/**?
??*?@brief??Set?SDA?Pin?as?Input?Mode?
??*?@param??None
??*?@retval?None?
??*/??
static?void?SDA_IN（）????
{????
????ADS7142_SDA_SET_IN（）;?
}???
??
/**
??*?@brief??create?start?signal
??*?@param??None
??*?@retval?1?or?0
??*/
static?uint8_t?IIC_Start（void）
{
????SDA_OUT（）;?????//sda?output??
	SDA_H;
	SCL_H;
	DelayNus（6）;
	if（!SDA_read）
	{
		return?0;
	}
	SDA_L;
	DelayNus（6）;
	if（SDA_read）?
	{
		return?0;
	}
	SDA_L;
	DelayNus（6）;
	return?1;

}


/**?
??*?@brief??Simulate?IIC?conmunication?:?Create?Stop?signal?
??*?@param??None
??*?@retval?None?
??*/??
static?void?IIC_Stop（void）
{

	SCL_L;
????SDA_OUT（）;????//sda?output?mode??
	DelayNus（6）;
	SDA_L;
	DelayNus（6）;
	SCL_H;
	DelayNus（6）;
	SDA_H;
	DelayNus（6）;

}


/**?
??*?@brief??Simulate?IIC?conmunication?:?wait?for?target?device‘s?ACK?
??*?@param??None
??*?@retval?ACK?（1）?:?receive?success?
??*?????????NACK（0）?:?receive?unsuccess?
??*/??
static?uint8_t?IIC_WaitAck（void）
{

????uint8_t?err_time?=?0;
	SCL_L;
????SDA_IN（）;??????//set?as?input?mode??
	DelayNus（6）;
	SDA_H;			
	DelayNus（6）;
	SCL_H;
	DelayNus（6）;
	while（SDA_read）
	{
????????err_time++;

????????if?（err_time?>?250）
????????{
????????????return?0;
????????}
	}
	SCL_L;
	return?1;

}


/**?
??*?@brief??Simulate?IIC?conmunication?:?make?an?ACK?
??*?@param??None
??*?@retval?None?
??*/??
static?void?IIC_Ack（void）
{

	SCL_L;
????SDA_OUT（）;??
	DelayNus（6）;
	SDA_L;
	DelayNus（6）;
	SCL_H;
	DelayNus（6）;
	SCL_L;
	DelayNus（6）;


}


/**?
??*?@brief??Simulate?IIC?conmunication?:?don‘t?make?an?ACK?
??*?@retval?None?
??*/??
static?void?IIC_NoAck（void）
{	

	SCL_L;
	SDA_OUT（）;
????DelayNus（6）;
	SDA_H;
	DelayNus（6）;
	SCL_H;
	DelayNus（6）;
	SCL_L;
	DelayNus（6）;

}


/**?
??*?@brief??Simulate?IIC?conmunication?:?Transmit?one?byte?Data?
??*?@param??SendByte:?data?to?be?transmit?
??*?@retval?None?
??*/??
static?void?IIC_SendByte（uint8_t?SendByte）
{

????uint8_t?i=8;
????SDA_OUT（）;
????while（i--）
????{
????????SCL_L;
????????DelayNus（6）;
????????if（SendByte&0x80）
????????????SDA_H;
????????else
????????????SDA_L;
	??
????????SendByte?<<=?1;
????????DelayNus（6）;
		SCL_H;?
????????DelayNus（6）;
????}
????SCL_L;

}


/**?
??*?@brief??Simulate?IIC?conmunication?:?Receive?one?byte?Data?
??*?@param??ack?->Whether?transm

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????9949??2018-09-06?15:39??ads7142\ads7142.c
?????文件???????21466??2018-09-06?15:47??ads7142\ads7142.h
?????文件?????2008363??2018-09-06?14:16??ads7142\ads7142.pdf
?????目錄???????????0??2018-11-01?17:42??ads7142\