#include?
#include?“stm32f4xx.h“
#include?“SysTick.h“

void?GECM4_AT24CXX_INIT（void）
{
	//?1.?配置i2c1引腳
	RCC_AHB1PeriphClockCmd（RCC_AHB1Periph_GPIOB?ENABLE）;

	GPIO_InitTypeDef?p;
	p.GPIO_Mode?=?GPIO_Mode_AF;
	p.GPIO_OType?=?GPIO_OType_OD;
	p.GPIO_Pin?=?GPIO_Pin_8?|?GPIO_Pin_9;
	p.GPIO_PuPd?=?GPIO_PuPd_NOPULL;
	p.GPIO_Speed?=?GPIO_Speed_50MHz;
	GPIO_Init（GPIOB??&p）;

	GPIO_PinAFConfig（GPIOB?GPIO_PinSource8?GPIO_AF_I2C1）;
	GPIO_PinAFConfig（GPIOB?GPIO_PinSource9?GPIO_AF_I2C1）;

	//?2.?初始化I2C控制器
	RCC_APB1PeriphClockCmd（RCC_APB1Periph_I2C1?ENABLE）;
	I2C_InitTypeDef?i;
	i.I2C_Ack?=?I2C_Ack_Enable;
	i.I2C_AcknowledgedAddress?=?I2C_AcknowledgedAddress_7bit;
	i.I2C_ClockSpeed?=?100000;
	i.I2C_DutyCycle?=?I2C_DutyCycle_16_9;
	i.I2C_Mode?=?I2C_Mode_I2C;
	i.I2C_OwnAddress1?=?0x55;?//沒用到
	I2C_Init（I2C1?&i）;


	//?3.?I2C?Enable
	I2C_Cmd（I2C1?ENABLE）;
	
}

void?Write_A_Byte_To_Max30102（uint8_t?word_addr??uint8_t?data）
{
	//（1）?Send?Start?Signal

	//printf（“%d\r\n“?__LINE__）;
	//當IIC總線BUSY時，我們一直等
	while?（?I2C_GetFlagStatus（I2C1?I2C_FLAG_BUSY）?==?SET?）;?

	//printf（“%d\r\n“?__LINE__）;

	//產生一個i2c起始信號
	I2C_GenerateSTART（I2C1?ENABLE）;

	//printf（“%d\r\n“?__LINE__）;
	//wait?EV5
	while?（?I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_MODE_SELECT）?==?ERROR）;

	//printf（“%d\r\n“?__LINE__）;
	//------

	//?I2C?Slave?ADDR（表示你要與哪個設備通信）
	I2C_Send7bitAddress（I2C1??0xAE?I2C_Direction_Transmitter）;?//主發


	//wait?EV6???;?Master?Send??mode
	while?（?I2C_CheckEvent（I2C1?
			I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED）?==?ERROR）;

	//?Send?Word?Addr
	I2C_SendData（I2C1?word_addr）;

	//wait?EV8
	while?（?I2C_CheckEvent（I2C1?
			I2C_EVENT_MASTER_BYTE_TRANSMITTING）?==?ERROR）;

	//Send?data
	I2C_SendData（I2C1?data）;

	//wait?EV8
	while?（?I2C_CheckEvent（I2C1?
			I2C_EVENT_MASTER_BYTE_TRANSMITTED）?==?ERROR）;

	I2C_GenerateSTOP（I2C1?ENABLE）;

	//printf（“finished\r\n“）;

	
}

uint8_t??Read_A_Byte_From_Max30102（uint8_t?word_addr）
{
	uint8_t?recv;

	//（1）?Send?Start?Signal

	//當IIC總線BUSY時，我們一直等
	while?（?I2C_GetFlagStatus（I2C1?I2C_FLAG_BUSY）?==?SET?）;?

	//printf（“%s?L_%d\n“?__FUNCTION__?__LINE__）;
	//產生一個i2c起始信號
	I2C_GenerateSTART（I2C1?ENABLE）;



	//?wait?ev5
	while?（?I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_MODE_SELECT）?==?ERROR）;

	//send?I2C?Slave?ADDR
	I2C_Send7bitAddress（I2C1?0xAE?I2C_Direction_Transmitter）;

	//?wait?ev6
	while?（?I2C_CheckEvent（I2C1?
			I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED）?==?ERROR）;


	//??word?addr
	I2C_SendData（I2C1word_addr）;

	while?（?I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_BYTE_TRANSMITTED）?==?ERROR）;


	I2C_GenerateSTART（I2C1?ENABLE）;
	//?wait?ev5
	while?（?I2C_CheckEvent（I2C1?I2C_EVENT_MASTER_MODE_SELECT）?==?ERROR）;

	//send?I2C?Slave?ADDR
	I2C_Send7bitAddress（I2C1?0xAF?I2C_