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stm32: Use TIM for runtime clock

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This commit is contained in:
Kenneth Bell
2021-05-15 10:38:40 -07:00
committed by Ron Evans
parent 003c96edc0
commit fa3dd41a4f
9 changed files with 122 additions and 307 deletions
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src/runtime/runtime_stm32l4x2.go
+1 -25
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@@ -50,38 +50,14 @@ const (
RCC_PLL_SYSCLK = stm32.RCC_PLLCFGR_PLLREN
)
/*
timer settings used for tick and sleep.
note: TICK_TIMER_FREQ and SLEEP_TIMER_FREQ are controlled by PLL / clock
settings above, so must be kept in sync if the clock settings are changed.
*/
const (
TICK_RATE = 1000 // 1 KHz
TICK_TIMER_IRQ = stm32.IRQ_TIM1_UP_TIM16
TICK_TIMER_FREQ = 80000000 // 80 MHz
SLEEP_TIMER_IRQ = stm32.IRQ_TIM1_BRK_TIM15
SLEEP_TIMER_FREQ = 80000000 // 84 MHz
)
type arrtype = uint32
func init() {
initCLK()
initSleepTimer(&timerInfo{
EnableRegister: &stm32.RCC.APB2ENR,
EnableFlag: stm32.RCC_APB2ENR_TIM15EN,
Device: stm32.TIM15,
})
machine.Serial.Configure(machine.UARTConfig{})
initTickTimer(&timerInfo{
EnableRegister: &stm32.RCC.APB2ENR,
EnableFlag: stm32.RCC_APB2ENR_TIM16EN,
Device: stm32.TIM16,
})
initTickTimer(&machine.TIM15)
}
func putchar(c byte) {