STM32F103 PWM timer3 output

[icamaster]

I am trying to generate a clock of 1.4MHz using the STM32F103C8Tx using the STM32CubeMX.

First of all, in my code I have pin PB13 as output and in main I toggle it every one second. This works.

Now the more important part. Things I have set up in CubeMX :

I have set up the base clock of the device to 28MHz.
TIM3 Channel2 :PWM Generation CH2
Internal Clock
Timer3 :

Here is the code :
https://gist.github.com/icamaster/e45649478a2e01d5beb46f4313e79e9c

Apart from the generate part, I have added these lines before the while(1) in the main :
  HAL_TIM_PWM_MspInit(&htim3);
  HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_2);

Where the *_MspInit function is :

Code: [Select]

void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* htim_pwm)
{

  if(htim_pwm->Instance==TIM3)
  {
  /* USER CODE BEGIN TIM3_MspInit 0 */

  /* USER CODE END TIM3_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_TIM3_CLK_ENABLE();
  /* USER CODE BEGIN TIM3_MspInit 1 */

  /* USER CODE END TIM3_MspInit 1 */
  }

}
The LED is blinking at the set interval but I have no output on the pin A7 (Timer3 channel 2). This is verified on the oscilloscope.

[Brutte]

Cross post warning 

[newbrain]

Look carefully at you setup value for period and pulse and their meaning.