Enabling TB PHSEN stops any PWM output?

Hi folks,

I am trying to setup an F28027 PWM (2A) that uses a sync input (from TZ1). I have code that outputs a PWM signal only as long as TBCTL.PHSEN is 0.

When I try to run the same code with the counter load enabled and use a software force on the sync to start the PWM, the GPIO pin is always LOW.

The below code works fine without the PWM_enableCounterLoad() line, but as soon as I uncomment it again, there is no PWM output... what am I doing wrong please?

Thanks!

CLK_enablePwmClock(clk, PWM_Number_2);		/* Enable clock to PWM2. */

	GPIO_setDirection(gpioHandle, pwmGpioNumber, GPIO_Direction_Output);	/* Configure GPIO as PWM output. */
	GPIO_setPullUp(gpioHandle, pwmGpioNumber, GPIO_PullUp_Enable);
	GPIO_setLow(gpioHandle, pwmGpioNumber);
	GPIO_setMode(gpioHandle, pwmGpioNumber, GPIO_0_Mode_EPWM1A);

	/* Time base submodule. */
	PWM_setPeriodLoad(pwmHandle, PWM_PeriodLoad_Immediate);	/* Set immediate load. */
	PWM_setPeriod(pwmHandle, myperiod - 1U);			/* Frequency = 1 / period. */
	PWM_setPhase(pwmHandle, 0U);							/* Set phase to 0 degreees. */
	PWM_setCount(pwmHandle, 0U);							/* Zero the count. */
	PWM_setCounterMode(pwmHandle, PWM_CounterMode_Up);		/* Set counter to count-up mode. */
	PWM_setHighSpeedClkDiv(pwmHandle, PWM_HspClkDiv_by_1);	/* TBCLK = SYSCLKOUT / 1. */
	PWM_setClkDiv(pwmHandle, PWM_ClkDiv_by_1);
//	PWM_enableCounterLoad(pwmHandle);						/* Enable load counter from phase register when sync'd. */
	PWM_setSyncMode(pwmHandle, PWM_SyncMode_EPWMxSYNC);		/* Enable synchonization input. */

	/* Counter compare submodule. */
	PWM_setCmpA(pwmHandle, CALC_IMIN_DUTY_PERIOD(ishr->period));/* Set output A duty to I_min initially. */
	PWM_setCmpB(pwmHandle, 0);									/* Clear output B duty (unused). */
	PWM_setShadowMode_CmpA(pwmHandle, PWM_ShadowMode_Shadow);	/* Load compare from the shadow register. */
	PWM_setLoadMode_CmpA(pwmHandle, PWM_LoadMode_Period);		/* Load compare at end of period. */

	/* Action qualifier submodule. */
	PWM_setActionQual_Zero_PwmA(pwmHandle, PWM_ActionQual_Set);	/* Set output A HIGH at start of period. */
	PWM_setActionQual_CntUp_CmpA_PwmA(pwmHandle, PWM_ActionQual_Clear);	/* Set output A LOW at counter compare A value. */

	PWM_setActionQual_Zero_PwmB(pwmHandle, PWM_ActionQual_Disabled);	/* Disable any action on output B (unused). */
	PWM_setActionQual_CntUp_CmpA_PwmB(pwmHandle, PWM_ActionQual_Disabled);
	PWM_setActionQual_Period_PwmB(pwmHandle, PWM_ActionQual_Disabled);

	PWM_forceSync(pwmHandle);	/* Force the PWM sync to start the PWM output. */
        CLK_enableTbClockSync(clkHandle);/