kfa100ftn单片机IIC
时间: 2024-01-20 18:02:22 浏览: 55
KF-A100FTN是一款基于8051架构的单片机,内置了I2C总线控制器,可以通过该控制器来实现I2C通信。下面是一个简单的示例代码,可以实现向一个I2C设备写入数据的功能:
```
#include <reg52.h>
sbit SDA = P1^0; //定义SDA引脚
sbit SCL = P1^1; //定义SCL引脚
void I2C_Delay()
{
//延时函数,可以根据实际情况进行修改
int i = 1000;
while(i--);
}
void I2C_Start()
{
SDA = 1;
SCL = 1;
I2C_Delay();
SDA = 0;
I2C_Delay();
SCL = 0;
}
void I2C_Stop()
{
SDA = 0;
SCL = 1;
I2C_Delay();
SDA = 1;
I2C_Delay();
}
void I2C_WriteByte(unsigned char dat)
{
int i;
for(i=0; i<8; i++)
{
SDA = dat & 0x80; //送数据
SCL = 1; //拉高时钟
I2C_Delay(); //延时
SCL = 0; //拉低时钟
dat <<= 1;
}
SDA = 1;
SCL = 1;
I2C_Delay();
SCL = 0;
}
void main()
{
I2C_Start(); //发送起始信号
I2C_WriteByte(0xA0); //发送设备地址,可以根据实际情况修改
I2C_WriteByte(0x00); //发送数据
I2C_WriteByte(0x01);
I2C_Stop(); //发送停止信号
}
```
在上面的代码中,SDA和SCL分别对应I2C总线的数据线和时钟线,I2C_Delay函数用于实现延时,I2C_Start函数用于发送起始信号,I2C_Stop函数用于发送停止信号,I2C_WriteByte函数用于向设备写入数据。其中,发送的设备地址和数据可以根据实际情况进行修改。
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