Arduino for STM32

I want to port some code from core 1.6.1 to 1.9.0 and use HardwareTimer. I used one pulse mode: // Initialize Timer 6 // - enable TIM6 clock // - set prescaler for 1 µs resolution // - one pulse mode // - force update #if STM32_CORE_VERSION < 0x01070000 RCC->APB1ENR |= RCC_APB1ENR_TIM6EN; TIM6->PSC ...