最近用了一款 BS8112A-3 16NSOP 12键电容触摸按键芯片IC，调了半天没调通 ，最后发现把设备地址看错了，手册给的是7bit地址，子设备地址应该是0xA0不应该是0x50!

现上代码：

#include "stm32f0xx.h"
void I2C_INT_Init()
{
	
	GPIO_InitTypeDef        GPIO_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure;
	NVIC_InitTypeDef  NVIC_InitStructure;
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);//ÅäÖÃʱÖÓ
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG,ENABLE);//ÅäÖÃʱÖÓ
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
	
 
	EXTI_InitStructure.EXTI_Line=EXTI_Line5;
	EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;
	EXTI_InitStructure.EXTI_LineCmd=ENABLE;
	
	SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource5);
	EXTI_Init(&EXTI_InitStructure);
	
	
	NVIC_InitStructure.NVIC_IRQChannel=EXTI4_15_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPriority=2;
	NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
	NVIC_Init(&NVIC_InitStructure);	
}
void I2C_SDACL_Init(void) //I2CÒý½ÅÅäÖÃ
{
		GPIO_InitTypeDef        GPIO_InitStructure;
	  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);//ÅäÖÃʱÖÓ
  
  	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
	  
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
	  GPIO_PinAFConfig(GPIOA,GPIO_PinSource10, GPIO_AF_4);
	  GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_4);
	  
}
 
 
void ZLG_24C_Init(void)//I2C³õʼ»¯º¯Êý
{ 
	I2C_InitTypeDef I2C_InitStructure;
	
	I2C_INT_Init();
	
	I2C_SDACL_Init();
	
	RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);//ÅäÖÃʱÖÓRCC_APB1Periph_I2C1
	
	I2C_InitStructure.I2C_Mode=I2C_Mode_I2C;
	I2C_InitStructure.I2C_Ack=I2C_Ack_Enable;
	//I2C_InitStructure.I2C_Ack=I2C_Ack_Disable;
	I2C_InitStructure.I2C_AcknowledgedAddress=I2C_AcknowledgedAddress_7bit;
  I2C_InitStructure.I2C_DigitalFilter = 0x00;
	I2C_InitStructure.I2C_OwnAddress1=0x00;
	//I2C_InitStructure.I2C_Timing=0x30E32E44;
	I2C_InitStructure.I2C_Timing=0x20D22E37;
	I2C_InitStructure.I2C_AnalogFilter=I2C_AnalogFilter_Enable;
  
	I2C_Init(I2C1,&I2C_InitStructure);
	I2C_Cmd(I2C1,ENABLE);
	// ZLG_24C_Read(0xA0,0x08);
}
uint8_t ZLG_24C_Read(uint8_t addr1, uint8_t addr2)//¶ÁI2Cº¯Êý
{
	uint8_t data;
	uint16_t i;
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET)
	{
		i++;
		if(i>600)  return 0;
	}
	I2C_TransferHandling(I2C1, addr1, 1, I2C_SoftEnd_Mode,I2C_Generate_Start_Write);
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)
	{
		i++;
		if(i>600)  return 0;
	}
	I2C_Senddata(I2C1, addr2);
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TC) == RESET)
	{
		i++;
		if(i>600) return 0;
	}
	I2C_TransferHandling(I2C1, addr1, 1,  I2C_AutoEnd_Mode, I2C_Generate_Start_Read);
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET)
	{
		i++;
		if(i>600) return 0;
	}
	data=I2C_Receivedata(I2C1);
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_STOPF) == RESET)
	{
		i++;
		if(i>600) return 0;
	}
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) != RESET)
	{
		i++;
		if(i>600) return 0;
	}
	return(data);
}
 
void ZLG_24C_Write(uint8_t addr1,uint8_t addr2,uint8_t data)//дI2Cº¯Êý
{
	uint16_t i;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET);
	I2C_TransferHandling(I2C1, addr1, 2, I2C_AutoEnd_Mode,I2C_Generate_Start_Write);
	
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)
	{
		i++;
		if(i>600) return;
	}
	
	I2C_Senddata(I2C1, addr2);
	
	i=0;
	while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET)
	{
		i++;
		if(i>600) return;
	}
 
	I2C_Senddata(I2C1, data);
	while(I2C_GetFlagStatus(I2C1,I2C_FLAG_STOPF) == RESET);
	
}
void EXTI4_15_IRQHandler(void)
{
	 if(EXTI_GetITStatus(EXTI_Line5)!=RESET)
	{ 
		settableflag(Flag_getkey,0);
    //riar=1;
	}	
	 EXTI_ClearITPendingBit(EXTI_Line5);//Çå³ýÖжϱê־λ
}