//go:build stm32f4 && (stm32f405 || stm32f407) package machine func CPUFrequency() uint32 { return 168000000 } // Internal use: configured speed of the APB1 and APB2 timers, this should be kept // in sync with any changes to runtime package which configures the oscillators // and clock frequencies const APB1_TIM_FREQ = 42000000 * 2 const APB2_TIM_FREQ = 84000000 * 2