H- Bridge controlled at 10KHZ with PIC16F1937

Hello everybody,I would like to control my H-bridge circuit with all IGBT controlled by 10khz,I referred to Tahmid http://tahmidmc.blogspot.com/2012/10/generation-of-sine-wave-using-spwm-in_10.html blog but I am not succeeding to make all the four pins at 10KHZ,could you please help me?
I have a quartz of 12KHZ and wants on P1A,P1B,P1C,and P1D to have an SPWM signal of 10KHZ,please help.

Best Regards,