Thank you so much for your comments.
It seems I got wrong understanding from the data sheet
I realized the half bridge ECCP function is suitable for push pull circuit.
Now ...
It works now ! I'm sooooo happy now.
The issue points was exactly PCM programmer's comments. You so great!
This below is correct code for just in case.
Thank you PCM programmer!
I completely agree with your comment. I should make normal 16F I2C method at first.
I obeyed your suggestion and fixed this program and tested it in other PIC. 16F88.(This ...
I'm testing I2C communication circuit with two PIC16F1827.
But it seems not work. I checked on SDA and SCL line by oscilloscope.
I tried to find what is wrong. But It's too diffic ...