PIC18LF24K40芯片编写I2C程序时在SCL和SDA线上得到了一个很高的波形

您好，我在PIC18LF24K40芯片上工作，在编写I2C程序时遇到了问题，尽管遵循了数据表中的指令，但是我在SCL和SDA线上得到了一个很高的波形，而不是像预期的波形。PS：我对PIC是新的，但是对AVR芯片有一定的经验。因此，我不是一个完整的初学者。



      以下为原文

    Hello,
Im working with PIC18LF24K40 chip and i have a problem while writing an I2C program, in spite of following the instructions in Datasheet, i get a HIGH on SCL and SDA lines instead of a Waveform as expected.

void I2C_Inititalise()
{
    RC3PPS = 0x0E;
    RC4PPS = 0x0D;
    SSP1CON1 = 0x28; //I2C Mode
    SSP1CON2 = 0x00;
    SSP1STAT = 0x00;
    SSP1ADD = 0x04; // Clock 400KHz
}
void send_start()
{
    while(SSP1STATbits.RW); // wait for write to complete
    SSP1CON2bits.SEN=1; //set start enable bit
      
    if(PIR3bits.BCLIF==1)
        PIR3bits.BCLIF =0; //Clear collision bit in PIR register
   
    while(SSP1CON2bits.SEN); //waits to get cleared by hardware
   
}

void main(void) {
   
    TRISCbits.TRISC2=0;
   
    init_oscillator();
   
    I2C_Inititalise();
   
     
    while(check_for_bus_free_iic());
    send_start();
    write_to_bus(0x2A<<1); //Address of slave + bit 0 (W)
     
    while(1){
        LATCbits.LATC2 ^= 1;
        PORTCbits.RC2 ^= 1;
    }
    return;
}


PS: I am new to PIC but have some experience with AVR chips. Therefore im not a complete beginner.