Clicker 2 and I2C

[rfcan]

Hello,

I'm using your Clicker 2 development board (PIC24FJ1024GB610 µC). I'm exploring it bit by bit by trying simple routines.

Recently, I tried I2C2_Init/Start/Write/Read/Stop and those functions work well.

I would like to know what code is behind each of those fonctions?

I tried to program an Init + Start + Write(slave address) + Write (control byte) + Write (data byte) + Stop without using mikroC's functions, but this simple routine is conflicting with my USB port. See below:

void main(){

I2C2BRG = 0x26; // Fosc 100 kHz
I2C2CONL= 0x0000; // Clear register

Delay_100ms();

while(1){

if (!I2C2_Is_Idle){
I2C2CONL= 0x8001; // start
}

if (!I2C2_Is_Idle){
I2C2TRN = 0x92; // write PCF8591 address
}

if (!I2C2_Is_Idle){
I2C2TRN = 0x40; // write PCF8591 control byte
}

if (!I2C2_Is_Idle){
I2C2TRN = 0xB0; // write data (50% of 5 VDC)
}

if (!I2C2_Is_Idle){
I2C2CONL= 0x8004; // stop
}

Delay_100ms();
}
}

What seems wrong with my code above? As an FYI: I'm using the RA2(SCL) and RA3 (SDA) lines. 10k pull-up resistors on each line.

Thanks,
RF Can

[filip]

Hi,

I would like to know what code is behind each of those fonctions?

Unfortunately, due to the company's policy I'm not in liberty to share the library source codes, thank you for the understanding.

Can you debug your code via hardware debugger and see if it hangs somewhere ?

Regards,
Filip.