message: give USB some clocks
diff: /* Private define ------------------------------------------------------------*/
  #define TIM_1_8_CLOCK_HZ 168000000
  // #define TIM_1_8_PERIOD_CLOCKS 4096
  -#define TIM_1_8_PERIOD_CLOCKS 8192
  +// #define TIM_1_8_PERIOD_CLOCKS 8192
  +#define TIM_1_8_PERIOD_CLOCKS 10192
  #define TIM_1_8_DEADTIME_CLOCKS 20
  #define TIM_APB1_CLOCK_HZ 84000000
  // #define TIM_APB1_PERIOD_CLOCKS 2048
  