ezdsp28335 independent ecap1, ecap2, ecap3 usage

I am using ezdsp28335 and I generated 12 pwm (epwm1 to epwm6 and their complementary output) for my aplication. I need to measure three signals period with ecap function. But ecap1 using epwm3b pin, like this ecap2 epwm4b and ecap3 epwm5b pins. On the other hand ecap1 to 3 seem to configurable other pins.

for ecap1 GPIO34_ECAP1_XREADY 2,         for ecap2 GPIO25_ECAP2_EQEP2B_MDRB 2,          for ecap3 GPIO25_ECAP2_EQEP2B_MDRB 2

I tried to configure this pins but I don’t managed. Please help me this problem,

Best regards,

Saban Ozdemir.