mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-11 22:43:40 +00:00
Harmonize stm32 ticks and sleep (#1673)
machine/stm32f*: move to harmonized tick / sleep logic code
This commit is contained in:
kenbell
GitHub
@@ -3,31 +3,8 @@
|
||||
package runtime
|
||||
|
||||
import (
|
||||
"device/arm"
|
||||
"device/stm32"
|
||||
"machine"
|
||||
"runtime/interrupt"
|
||||
"runtime/volatile"
|
||||
)
|
||||
|
||||
func init() {
|
||||
initCLK()
|
||||
initTIM3()
|
||||
machine.UART0.Configure(machine.UARTConfig{})
|
||||
initTIM7()
|
||||
}
|
||||
|
||||
func putchar(c byte) {
|
||||
machine.UART0.WriteByte(c)
|
||||
}
|
||||
|
||||
const (
|
||||
HSE_STARTUP_TIMEOUT = 0x0500
|
||||
/* PLL Options - See RM0090 Reference Manual pg. 95 */
|
||||
PLL_M = 8 /* PLL_VCO = (HSE_VALUE or HSI_VLAUE / PLL_M) * PLL_N */
|
||||
PLL_N = 336
|
||||
PLL_P = 2 /* SYSCLK = PLL_VCO / PLL_P */
|
||||
PLL_Q = 7 /* USB OTS FS, SDIO and RNG Clock = PLL_VCO / PLL_Q */
|
||||
)
|
||||
|
||||
/*
|
||||
@@ -40,8 +17,56 @@ const (
|
||||
| APB1(PCLK1) | 42mhz |
|
||||
+-------------+--------+
|
||||
*/
|
||||
func initCLK() {
|
||||
const (
|
||||
HSE_STARTUP_TIMEOUT = 0x0500
|
||||
// PLL Options - See RM0090 Reference Manual pg. 95
|
||||
PLL_M = 8 // PLL_VCO = (HSE_VALUE or HSI_VLAUE / PLL_M) * PLL_N
|
||||
PLL_N = 336
|
||||
PLL_P = 2 // SYSCLK = PLL_VCO / PLL_P
|
||||
PLL_Q = 7 // USB OTS FS, SDIO and RNG Clock = PLL_VCO / PLL_Q
|
||||
)
|
||||
|
||||
/*
|
||||
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_TIM7
|
||||
TICK_TIMER_FREQ = 84000000 // 84 MHz
|
||||
SLEEP_TIMER_IRQ = stm32.IRQ_TIM3
|
||||
SLEEP_TIMER_FREQ = 84000000 // 84 MHz
|
||||
)
|
||||
|
||||
type arrtype = uint32
|
||||
|
||||
const asyncScheduler = false
|
||||
|
||||
func init() {
|
||||
initCLK()
|
||||
|
||||
initSleepTimer(&timerInfo{
|
||||
EnableRegister: &stm32.RCC.APB1ENR,
|
||||
EnableFlag: stm32.RCC_APB1ENR_TIM3EN,
|
||||
Device: stm32.TIM3,
|
||||
})
|
||||
|
||||
machine.UART0.Configure(machine.UARTConfig{})
|
||||
|
||||
initTickTimer(&timerInfo{
|
||||
EnableRegister: &stm32.RCC.APB1ENR,
|
||||
EnableFlag: stm32.RCC_APB1ENR_TIM7EN,
|
||||
Device: stm32.TIM7,
|
||||
})
|
||||
}
|
||||
|
||||
func putchar(c byte) {
|
||||
machine.UART0.WriteByte(c)
|
||||
}
|
||||
|
||||
func initCLK() {
|
||||
// Reset clock registers
|
||||
// Set HSION
|
||||
stm32.RCC.CR.SetBits(stm32.RCC_CR_HSION)
|
||||
@@ -104,111 +129,7 @@ func initCLK() {
|
||||
for {
|
||||
}
|
||||
}
|
||||
|
||||
// Enable the CCM RAM clock
|
||||
stm32.RCC.AHB1ENR.SetBits(1 << 20)
|
||||
|
||||
}
|
||||
|
||||
var (
|
||||
// tick in milliseconds
|
||||
tickCount timeUnit
|
||||
)
|
||||
|
||||
var timerWakeup volatile.Register8
|
||||
|
||||
func ticksToNanoseconds(ticks timeUnit) int64 {
|
||||
return int64(ticks) * 1000
|
||||
}
|
||||
|
||||
func nanosecondsToTicks(ns int64) timeUnit {
|
||||
return timeUnit(ns / 1000)
|
||||
}
|
||||
|
||||
// Enable the TIM3 clock.(sleep count)
|
||||
func initTIM3() {
|
||||
stm32.RCC.APB1ENR.SetBits(stm32.RCC_APB1ENR_TIM3EN)
|
||||
|
||||
intr := interrupt.New(stm32.IRQ_TIM3, handleTIM3)
|
||||
intr.SetPriority(0xc3)
|
||||
intr.Enable()
|
||||
}
|
||||
|
||||
// Enable the TIM7 clock.(tick count)
|
||||
func initTIM7() {
|
||||
stm32.RCC.APB1ENR.SetBits(stm32.RCC_APB1ENR_TIM7EN)
|
||||
|
||||
// CK_INT = APB1 x2 = 84mhz
|
||||
stm32.TIM7.PSC.Set(84000000/10000 - 1) // 84mhz to 10khz(0.1ms)
|
||||
stm32.TIM7.ARR.Set(10 - 1) // interrupt per 1ms
|
||||
|
||||
// Enable the hardware interrupt.
|
||||
stm32.TIM7.DIER.SetBits(stm32.TIM_DIER_UIE)
|
||||
|
||||
// Enable the timer.
|
||||
stm32.TIM7.CR1.SetBits(stm32.TIM_CR1_CEN)
|
||||
|
||||
intr := interrupt.New(stm32.IRQ_TIM7, handleTIM7)
|
||||
intr.SetPriority(0xc1)
|
||||
intr.Enable()
|
||||
}
|
||||
|
||||
const asyncScheduler = false
|
||||
|
||||
// sleepTicks should sleep for specific number of microseconds.
|
||||
func sleepTicks(d timeUnit) {
|
||||
timerSleep(uint32(d))
|
||||
}
|
||||
|
||||
// number of ticks (microseconds) since start.
|
||||
func ticks() timeUnit {
|
||||
// milliseconds to microseconds
|
||||
return tickCount * 1000
|
||||
}
|
||||
|
||||
// ticks are in microseconds
|
||||
func timerSleep(ticks uint32) {
|
||||
timerWakeup.Set(0)
|
||||
|
||||
// CK_INT = APB1 x2 = 84mhz
|
||||
// prescale counter down from 84mhz to 10khz aka 0.1 ms frequency.
|
||||
stm32.TIM3.PSC.Set(84000000/10000 - 1) // 8399
|
||||
|
||||
// set duty aka duration
|
||||
arr := (ticks / 100) - 1 // convert from microseconds to 0.1 ms
|
||||
if arr == 0 {
|
||||
arr = 1 // avoid blocking
|
||||
}
|
||||
stm32.TIM3.ARR.Set(arr)
|
||||
|
||||
// Enable the hardware interrupt.
|
||||
stm32.TIM3.DIER.SetBits(stm32.TIM_DIER_UIE)
|
||||
|
||||
// Enable the timer.
|
||||
stm32.TIM3.CR1.SetBits(stm32.TIM_CR1_CEN)
|
||||
|
||||
// wait till timer wakes up
|
||||
for timerWakeup.Get() == 0 {
|
||||
arm.Asm("wfi")
|
||||
}
|
||||
}
|
||||
|
||||
func handleTIM3(interrupt.Interrupt) {
|
||||
if stm32.TIM3.SR.HasBits(stm32.TIM_SR_UIF) {
|
||||
// Disable the timer.
|
||||
stm32.TIM3.CR1.ClearBits(stm32.TIM_CR1_CEN)
|
||||
|
||||
// clear the update flag
|
||||
stm32.TIM3.SR.ClearBits(stm32.TIM_SR_UIF)
|
||||
|
||||
// timer was triggered
|
||||
timerWakeup.Set(1)
|
||||
}
|
||||
}
|
||||
|
||||
func handleTIM7(interrupt.Interrupt) {
|
||||
if stm32.TIM7.SR.HasBits(stm32.TIM_SR_UIF) {
|
||||
// clear the update flag
|
||||
stm32.TIM7.SR.ClearBits(stm32.TIM_SR_UIF)
|
||||
tickCount++
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user