具有PIC18F27K42+DS1307从器件的I2C主模式错误

大家好，这些天我一直在用PIC18F27 K42工作，我已经“成功”了（因为我需要调试当前数据）与MPU6050模块进行通信，并生成MCC代码。现在我想在我的项目中添加一个RTC（DS1307）模块。问题是，我正在读取从设备的数据，数据在每一个循环期间都没有改变。我假设读秒的寄存器需要连续地变化，但是它没有。对于这两个接口，我都遵循这个网站：MPU6050:DS1307：我认为问题来自F。在等待ACK或NACK时，MCC似乎没有合适的设置，我认为MCC设置一个单一数据以从从属、ACK或NACK获得，而当数据不改变时，寻找NACK（我认为，根据DS1307数据表），问题是我不知道如何解决。我从MCC生成的I2C库代码中得到了这种数据持久性。我使用10K电阻作为PLUP。我使用的I2C2.C代码行：这些是我的RTC读取函数。变量是全局的，所以我只调用这个函数将当前数据设置为每个变量。当是显示值的时候，这是主代码，TFT函数是我的“控制台”来打印我从微控制器得到的。I2C2设置代码中可能有什么错误？也许我需要在阅读过程中从ACK切换到NACK？怎么办？我想答案来自I2C2CON1寄存器。期待听到一些提示，使这件事的工作！我没有显示MPU代码，因为它总是与当前的I2C配置正常工作。我测试了这两个，但问题是在DS1307模块（微型RTC模块）感谢您的时间。



      以下为原文

    Hello guys,

I've been working these days with the PIC18F27K42 and I've "successfully" (Since I need to debug current data) communicate with an MPU6050 module with the MCC code generated. Now I want to add an RTC (DS1307) module to my project. The problem is that I'm reading data from the slave device and data does not change at all during each while loop.

I assume that the register that reads seconds needs to change continously but it doesn't.

For both interfaces I followed this website:
MPU6050:
http://www.electronicwings.com/pic/mpu6050-gyroscope-accelerometer-temperature-interface-with-pic18f4550

DS1307:
http://www.electronicwings.com/pic/real-time-clock-rtc-ds1307-interfacing-with-pic18f4550

I think that problem comes from the fact that MCC seems to not have a proper setup when is waiting for an ACK or a NACK, I think that MCC sets one single data to get from slave, an ACK or NACK, and that's when data doesn't change, looking for an NACK (I think, according to DS1307 datasheet) the problem is that I do not know how to solve this persistence of data from my I2C library code generated by MCC.

I'm using 10k resistors as Pull-ups.

My I2C2.c code lines used:
void I2C2_Initialize(void)
{
if(!I2C2CON0bits.EN || lastError != I2C2_GOOD)
    {
  lastError = I2C2_GOOD;
  // TXU 0; CSD Clock Stretching enabled; ACKT 0; RXO 0; ACKDT Acknowledge; ACKSTAT ACK received; ACKCNT Not Acknowledge;
  I2C2CON1 = 0x80;
  // ABD enabled; GCEN disabled; ACNT disabled; SDAHT 300 ns hold time; BFRET 16 I2C Clock pulses; FME disabled;
  I2C2CON2 = 0x01;

  // CLK MFINTOSC;
  I2C2CLK = 0x03;
  // CSTR Enable clocking; S Cleared by hardware after Start; MODE 7-bit address; EN enabled; RSEN disabled;
  I2C2CON0 = 0x84;
  I2C2PIR = 0;// ;Clear all the error flags
  I2C2ERR = 0;
}
}

uint8_t i2c2_read1ByteRegister(uint8_t address, uint8_t reg)
{
    uint8_t result;

    I2C2_Initialize();
    I2C2ADB1= (uint8_t)(address<<1);
    I2C2CNT=1;
    I2C2CON0bits.RSEN=1;
    I2C2CON0bits.S=1; //Start
    while (I2C2CON0bits.S);
    sendByte(reg);
    wait4MDRSetcount(1);
    address = (uint8_t)(address<<1);
    I2C2ADB1= (uint8_t)(address| 0x01); //Change the R/W bit for read
    I2C2CON0bits.S=1; //Start
    I2C2CON0bits.RSEN=0;
    result = receiveByte();
    wait4Stop();
    return result;
}


These are my RTC read functions. The variables are global, so I only call the function that this one will set current data to each variable.
void RTC_Read_Clock(void)
{
    sec = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x00);
    min = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x01);
    hour = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x02);
}

void RTC_Read_Calendar(void)
{
    Day = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x03);
    Date = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x04);
    Month = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x05);
    Year = i2c2_read1ByteRegister(CLOCK_ADDRESS, 0x06);
}

When is time to show the values, this is the main code, TFT functions are my "console" to print what I got from the microcontroller.
// main code
    uint8_t buf4[16];
    uint8_t buf5[16];
    uint8_t buf6[16];

while (TRUE) {
        Delay_ms(150);

        sprintf(buf4, "Sec = %X ", sec);
        TFT_Text(buf4, 20, 82, WHITE, BLACK);
        sprintf(buf5, "Min = %X ", min);
        TFT_Text(buf5, 20, 102, WHITE, BLACK);
        sprintf(buf6, "Hour = %X", hour);
        TFT_Text(buf6, 20, 122, WHITE, BLACK);
}


What could be wrong in the I2C2 setup code? Is it maybe that I need to switch from ACK to NACK during the readings? How could be done?

I think that answer comes from the I2C2CON1 register.

Looking forward to hear some hints to get this thing work! I'm not showing the MPU code, since it's always working normally with the current I2C configuration. I tested both but the problem is in the DS1307 module (TINY RTC module)

Thank you for your time.