stm8 Slave

本文主要是介绍stm8 Slave，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

宏定义

#define SLAVE_ADDR 0x51
#define I2CSPEED 400000 //i2c速度
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stm8l051 i2c从机初始化

    /* I2C  clock Enable*/CLK_PeripheralClockConfig(CLK_Peripheral_I2C1, ENABLE);I2C_DeInit(I2C1);I2C_Init(I2C1, I2CSPEED, SLAVE_ADDR ,I2C_Mode_I2C, I2C_DutyCycle_2,I2C_Ack_Enable, I2C_AcknowledgedAddress_7bit);/* Enable Error Interrupt*/I2C_ITConfig(I2C1, (I2C_IT_TypeDef)(I2C_IT_ERR | I2C_IT_EVT | I2C_IT_BUF), ENABLE);
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stm8s103 i2c从机初始化

I2C_Init(I2CSPEED, SLAVE_ADDR , I2C_DUTYCYCLE_2, I2C_ACK_CURR, I2C_ADDMODE_7BIT, I2CCLK);//I2C初始化
I2C_ITConfig(I2C1, (I2C_IT_TypeDef)(I2C_IT_ERR | I2C_IT_EVT | I2C_IT_BUF), ENABLE);
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中断处理

{/* In order to detect unexpected events during development,it is recommended to set a breakpoint on the following instruction.*/
//接收发送Uchar temp = 0;if (I2C1->SR1&0x02)//地址已经匹配(读SR1，SR3清除该位){temp = I2C1->SR3&0x07;}else if ((I2C1->SR1&0x84)&&(I2C1->SR3&0x04))//数据字节传送完{temp = 0xA5;    //假设这里发送0xA5I2C1->DR = temp;}else if ((I2C1->SR1&0x40)&&(0 == (I2C1->SR3&0x04)))//接收时数据寄存器{temp = I2C1->DR;    //读取数据寄存器}else if (I2C1->SR1&0x10)//检测到停止位{I2C1->CR2 = I2C1->CR2;//清除停止位}//错误处理if (I2C1->SR2&0x01)//总线错误{I2C1->SR2 &= ~0x01;//清零}else if(I2C1->SR2&0x02)//仲裁失败{I2C1->SR2 &= ~0x02;//清零}else if(I2C1->SR2&0x04)//应答失败{I2C1->SR2 &= ~0x04;//清零}else if(I2C1->SR2&0x08)//上溢、下溢{I2C1->SR2 &= ~0x08;//清零}return;
}
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以上程序已长时间测试未发生过任何异常，所以他们说stm8的I2C存在硬件BUG应该是谣言。

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