Linux/SDK-AM437X: PWM driver cannot be checked in CCS

Which SDK version is this? What command do you use "to generate WAVE"?

SDK version：

ti-processor-sdk-linux-rt-am437x-evm-02.00.02.11

command：

echo 0 >/sys/class/pwm/pwmchip0/export

echo 1000000000 >/sys/class/pwm/pwmchip0/pwm0/period

echo  500000000 >/sys/class/pwm/pwmchip0/pwm0/duty_cycle

echo   inversed >/sys/class/pwm/pwmchip0/pwm0/polarity

echo 1 >/sys/class/pwm/pwmchip0/pwm0/enable

This seems correct. Which addresses are you looking at in CCS?

i am using the register interface to check. It is under the PWMSS0_EPWM. Named TBPRD, it is zero. I also check PWMSS1_EPWM, PWMSS2_EPWM, PWMSS3_EPWM,PWMSS4_EPWM,PWMSS5_EPWM's TBPRD, all are zero.

I think you should check section 20.2.2.11 of the AM437x TRM Rev. G.

i try to configure the 2 register as you say. But still cannot seen the PWM register change. Today i fonud that when i enter into the /sys/class/pwmchip0. using "ls -l" i found that the device is choosen the eCAP function. So i check on the CCS found the TSR is changging every time. So i want to change the PWM from eCap  to ehrpwm. How to do it? 

PS: i enter into the menuconfig and found that the PWM only has 3 options:Interl LPSS support, TWL 4030/6030 pwm support and TWL4030/6030 support for LED drivers.