STM32f05 100kHz TIM_16 nur mit hardware ?

static void setup_Timer16(void) {

  TIM_OCInitTypeDef  TIM_OCInitStructure;

  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

  GPIO_InitTypeDef GPIO_InitStructure;

  // clock on Timer 16 enable

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);

  // GPIOB clocks enable

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

  // GPIOB Configuration: Pin PB8 AF2 connecting to TIM16 Ch1

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;

  GPIO_InitStructure.GPIO_Mode = /*GPIO_Mode_OUT*/GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOB, &GPIO_InitStructure);

  // Connect TIM16 pins to AF2

  GPIO_PinAFConfig(GPIOB, GPIO_PinSource8, GPIO_AF_2);

  TIM_DeInit(TIM16 );

  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

  /* Time base configuration */

  TIM_TimeBaseStructure.TIM_Period = (SystemCoreClock / 50000/*lcd_Contrast*/) - 1;

  TIM_TimeBaseStructure.TIM_Prescaler = 0x0;

  TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;

  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM16, &TIM_TimeBaseStructure);

  // Timer output compare configuration

  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OCInitStructure.TIM_OCMode = /*TIM_OCMode_Timing*/TIM_OCMode_Toggle;

  TIM_OCInitStructure.TIM_Pulse = 500;

  TIM_OC1Init(TIM16, &TIM_OCInitStructure);

/*

  NVIC_InitTypeDef nvic;

  nvic.NVIC_IRQChannel = TIM16_IRQn;

  nvic.NVIC_IRQChannelCmd = ENABLE;

  nvic.NVIC_IRQChannelPriority = 3;

  NVIC_Init(&nvic);

  TIM_ITConfig(TIM16, TIM_IT_CC1 | TIM_IT_Update, ENABLE);

*/

  /* TIM16 enable counter */

  TIM_Cmd(TIM16, ENABLE);

}