双机通讯时在从机地址接收时出现了问题

1万 · 2018-12-7 13:08

STM32,i2c双机通讯

1万 · 2018-12-7 13:10

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

1万 · 2018-12-7 13:16

主机接收n个字节：
void I2C_ByteRead(void)
{
            while(I2C_GetFlagStatus(I2C2,I2C_FLAG_BUSY));

            I2C_GenerateSTART(I2C2, ENABLE);
            //EV5
            while(!I2C_CheckEvent(I2C2,I2C_EVENT_MASTER_MODE_SELECT));
            //while(!((uint16_t)(I2C2->SR1)&(uint16_t)(0x0001)));//SB=1
            //while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);//BUSY=1
            I2C_Send7bitAddress(I2C2, I2C2_SLAVE_ADDRESS7, I2C_Direction_Transmitter);

            //EV6
            while(!I2C_CheckEvent(I2C2,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
            //while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0002))!=0x0002);//??????????
            //while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);
            while(RxCounter!=BUFFER_SIZE)
            {
                     if(RxCounter==(BUFFER_SIZE-1))
                     {
                                    if(I2C_GetFlagStatus(I2C2, I2C_FLAG_RXNE)==1)
                                    {
                                             I2C_AcknowledgeConfig(I2C2, DISABLE);
                                             I2C_GenerateSTOP(I2C2, ENABLE);
                                    }
                     }
                     //EV7
                     while(!(I2C_CheckEvent(I2C2,I2C_EVENT_MASTER_BYTE_RECEIVED)));
                     //while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0040))!=0x0040);
                     //while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0003))!=0x0003);
                     RxBuffer[RxCounter++] = I2C_ReceiveData(I2C2);
            }

            I2C_GenerateSTOP(I2C2, ENABLE);
            I2C_AcknowledgeConfig(I2C2, ENABLE);
            RxCounter=0;
}
从机发送n个字节：
void I2C_ByteWrite()
{
while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0002))!=0x0002);//ADDR=1 receive address matched
while(((uint16_t)(I2C2->SR2)&(uint16_t)(0x0006))!=0x0006);//BUSY=1+MSL=0+TRA=1
I2C_SendData(I2C2,TxBuffer[TxCounter++]);

while(TxCounter!=BUFFER_SIZE)
      {
                     while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0080))!=0x0080);//DRÎª¿ÕÊ±Îª1£¬Ð´ÈëDRÇå³ý¸ÃÎ»
                     I2C_SendData(I2C2,TxBuffer[TxCounter++]);
            }

            while(((uint16_t)(I2C2->SR1)&(uint16_t)(0x0010))!=0x0010);
            TxCounter=0;
}