Missing way to set TIM_CtrlPWMOutputs from timer feature classes.

[Mike Purvis]

Calling this function is part of the deprecated initCompare scheme, but there's no way to do it using the feature classes.

This breaks initializing TIM1/8 as h-bridge motor controllers. Here's what you end up having to do:

template<class Pins>
struct timer_features<Timer1, Pins>
{
  typedef Timer1InternalClockFeature InternalClockFeature;
  typedef Timer1CustomGpioFeature<
      TIM1_CH1_OUT<Pins>,
      TIM1_CH1N<Pins>,
      TIM1_CH2_OUT<Pins>,
      TIM1_CH2N<Pins> > GpioDriveFeature;

  static void initDrive()
  {
    // Gah!
    TIM_CtrlPWMOutputs(tim, ENABLE);
  }
};

template<template <typename...> class DriveTimer, class TimerPins>
class DriveHardware
{
  typedef timer_features<DriveTimer, TimerPins> DriveTimerFeatures;

  template< template <typename...> class TimerChannelFeature >
  using DriveChannelFeature = TimerChannelFeature<
    TimerChannelOCModeFeature<TIM_OCMode_PWM1>,
    TimerChannelOCPolarityFeature<TIM_OCPolarity_High>,
    TimerChannelOCNPolarityFeature<TIM_OCPolarity_High>,
    TimerChannelOCPulseFeature<0> >;

  typedef DriveTimer<
    typename DriveTimerFeatures::InternalClockFeature,
    typename DriveTimerFeatures::GpioDriveFeature,
    DriveChannelFeature<TimerChannel1Feature>,
    DriveChannelFeature<TimerChannel2Feature>
  > DriveTimerT;

  DriveHardware(....)
  {
    [ ... ]
    // Eeep!
    DriveTimerFeatures::initDrive();
  }
}

With a feature class for enabling PWM output, the static function and oddball constructor call would be able to go away.

[Andy Brown]

I'll add this as part of a more general feature class to control the break functionality offered by some of the timers. I guess it's a safety feature that the MOE bit is initialized low after reset so you have to know about it even if you're not using the break feature that it was designed to support.

[Andy Brown]

Mike - see the timer_pwm_break demo. The call you want is timer.enableMainOutput(); that you get from the UnlockedTimerBreakFeature template.