[参考译文] TMS320F28034：在 I2C 中添加了一个新的温度和湿度传感器、以读取6个字节的温度和湿度数据

您好、Aishwarya、

我通常在进入函数后立即处理数据和状态判断,并最终执行状态判断,而我读取的函数可以引用我修改的官方程序

此致

__interrupt void
i2c_int1a_isr(void)
{
    Uint16 IntSource, i;

    //
    // Read interrupt source
    //
    IntSource = I2caRegs.I2CISRC.all;
    IntSource1 = I2caRegs.I2CSTR.bit.RRDY;
    //
    // Interrupt source = stop condition detected
    //
    if(IntSource == I2C_SCD_ISRC)
    {
        //
        // If completed message was writing data, reset msg to inactive state
        //
        if (CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_WRITE_BUSY)
        {
            CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_INACTIVE;
        }
        else
        {
            //
            // If a message receives a NACK during the address setup portion
            // of the EEPROM read, the code further below included in the
            // register access ready interrupt source code will generate a stop
            // condition. After the stop condition is received (here), set the
            // message status to try again. User may want to limit the number
            // of retries before generating an error.
            //
            if(CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP_BUSY)
            {
                CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_SEND_NOSTOP;
            }
           
            //
            // If completed message was reading EEPROM data, reset msg to
            // inactive state and read data from FIFO.
            //
            else if (CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_READ_BUSY)
            {
                CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_INACTIVE;
               
                for(i=0; i < I2C_NUMBYTES; i++)
                {
                    CurrentMsgPtr->MsgBuffer[i] = I2caRegs.I2CDRR;
                }
               
                {
                    //
                    // Check received data
                    //
                    for(i=0; i < I2C_NUMBYTES; i++)
                    {
                        if(I2cMsgIn1.MsgBuffer[i] == I2cMsgOut1.MsgBuffer[i])
                        {
                            PassCount++;
                        }
                        else
                        {
                            FailCount++;
                        }
                    }
                   
                    if(PassCount == I2C_NUMBYTES)
                    {
                        pass();
                    }
                   
                    else
                    {
                        fail();
                    }
                }
            }
        }
    }
    else if (IntSource1 == 1)
    {
//        if (I2cMsg.status == I2C_MSG_STATUS_READ_BUSY)
//        {
            static Uint16 ReadCount;

            ReadCount++;
            Buffer[ReadCount] = I2caRegs.I2CDRR;

            if(ReadCount == 5)
            {
                ReadCount=0;
            }
//        }
    }
    //
    // Interrupt source = Register Access Ready
    // This interrupt is used to determine when the EEPROM address setup
    // portion of the read data communication is complete. Since no stop bit is
    // commanded, this flag tells us when the message has been sent instead of
    // the SCD flag. If a NACK is received, clear the NACK bit and command a
    // stop. Otherwise, move on to the read data portion of the communication.
    //
    else if(IntSource == I2C_ARDY_ISRC)
    {
        if(I2caRegs.I2CSTR.bit.NACK == 1)
        {
            I2caRegs.I2CMDR.bit.STP = 1;
            I2caRegs.I2CSTR.all = I2C_CLR_NACK_BIT;
        }
        else if(CurrentMsgPtr->MsgStatus == I2C_MSGSTAT_SEND_NOSTOP_BUSY)
        {
            CurrentMsgPtr->MsgStatus = I2C_MSGSTAT_RESTART;
        }
         else if (I2cMsg.status == I2C_MSG_STATUS_WRITE_BUSY)
        {
            I2cMsg.status = I2C_MSG_STATUS_RW_OK;
          //  InitSetSHT3XI2ca();
            I2caRegs.I2CFFRX.all =0x0040;  // Enable RXFIFO, clear RXFFINT,
    }  
            //I2caRegs.I2CMDR.all = 0x0000;    // reset I2C
            //I2caRegs.I2CMDR.all = 0x0020;

        }
                
   
    else
    {
        //
        // Generate some error due to invalid interrupt source
        //
        __asm("   ESTOP0");
    }

    //
    // Enable future I2C (PIE Group 8) interrupts
    //
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP8;
}

我已经尝试使用 I2CIRC 寄存器的4个中断条件和 I2CSTR 的 RRDY 条件、但接收寄存器中的值不能被成功读取。

我应该如何改变它,我应该在哪种状态下读取它?

此致、