iic调试软件上时钟芯片测试,硬件IIC测试成功！！给大家分享一下

昨天花了一天时间，寻寻觅觅找代码，测试了好多都败了，上午终于找到一个成功的！

已经在mini板上测试过了，给大家分享一下

/**********************************************************************/

/*IIC配置                                      */

/*

*/

/**********************************************************************/

void Iic_Init()

{

GPIO_InitTypeDef GPIO_InitStructure;

I2C_InitTypeDef I2C_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);

/* Configure IO connected to IIC*********************/

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;

GPIO_Init(GPIOB, &GPIO_InitStructure);

I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;

I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;

I2C_InitStructure.I2C_OwnAddress1 = 0xa0;  //这里是eeprom地址

I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;

I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;

I2C_InitStructure.I2C_ClockSpeed = 200000;

I2C_Cmd(I2C2, ENABLE);

I2C_Init(I2C2, &I2C_InitStructure);

}

/**********************************************************************/

/*IIC写一个字节                                      */

/*id：eeprom地址write_address：要写入的地址byte：写入的数据

*/

/**********************************************************************/

void I2C_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)

{

I2C_GenerateSTART(I2C2,ENABLE);

//产生起始条件

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

//等待ACK

I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);

//向设备发送设备地址

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

//等待ACK

I2C_SendData(I2C2, write_address);

//寄存器地址

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

//等待ACK

I2C_SendData(I2C2, byte);

//发送数据

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

//发送完成

I2C_GenerateSTOP(I2C2, ENABLE);

//产生结束信号

}

/**********************************************************************/

/*IIC读数据                                        */

/*

*/

/**********************************************************************/

unsigned char I2C_ReadByte(unsigned char  id, unsigned char read_address)

{

unsigned char temp;

while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));

//等待I2C

I2C_GenerateSTART(I2C2, ENABLE);

//产生起始信号

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

//EV5

I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);

//发送地址

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));

//EV6

I2C_Cmd(I2C2, ENABLE);

//重新设置可以清楚EV6

I2C_SendData(I2C2, read_address);

//发送读得地址

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));

//EV8

I2C_GenerateSTART(I2C2, ENABLE);

//重新发送

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));

//EV5

I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver);

//发送读地址

while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));

//EV6

I2C_AcknowledgeConfig(I2C2, DISABLE);

I2C_GenerateSTOP(I2C2, ENABLE);

//关闭应答和停止条件产生

while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));

temp = I2C_ReceiveData(I2C2);

I2C_AcknowledgeConfig(I2C2, ENABLE);

return temp;

}