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设备为stm32L071,rtt是github上下载的最新版4.1.1。在调试pm功能时遇到问题:' z6 |8 Q# s* j1 i1 c
1.可以进入STOP模式,tickless使用lptim,工作正常,软件定时器可以主动唤醒。
( T2 o$ f8 ?3 h4 C# n$ i$ f2.当使用外部中断唤醒stop模式后,串口工作不正常,debug发现唤醒后竟然先执行了中断服务函数,然后切换到等待信号量的线程,直到idle后才会执行中的睡眠前的代码处,这时才执行恢复时钟函数。
, B+ t s$ ]. |, f# c; }4 Ipm睡眠前应该是禁用了全局中断的,只发生pending不执行ISR才对,为什么会有这种问题呢?
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static void rx_thread_entry(void *param)
9 p/ i4 h |9 F* Y$ V4 E{
1 V. g( O3 V6 u6 X1 r9 swhile(1)
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if (rt_sem_take(rx_sem, RT_WAITING_FOREVER) == RT_EOK). x F1 [- g5 X9 j. A
{
8 D$ `* j: a8 M9 H8 qrt_pm_sleep_request(PM_BOARD_ID, PM_SLEEP_MODE_NONE);
6 }& f8 e- y) k; W6 Q$ Fdo something //此时串口异常,LOG等功能输出乱码0 }7 l' D$ Y( x- ]* D( u, ] |
rt_thread_mdelay(5); //执行到此处,才跳转到睡眠前位置,恢复时钟
3 X# y8 r# L0 s8 Z* Nrt_thread_mdelay(5000);
5 l; x+ z, l7 R; I+ Crt_pm_sleep_release(PM_BOARD_ID, PM_SLEEP_MODE_NONE);
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}
. d4 R2 ~* B* y& K0 k# vvoid lora_rx_irq_callback(void *parameter)
( l t$ a7 [; n( m* U+ p{
8 R' C- t- i- b3 m4 x1 v6 f7 Nrt_sem_release(rx_sem); //先执行此行,释放信号量; L) ?/ d& {6 s3 \9 |' g; A
}
. n' @2 e |1 `& Kpm适配代码如下:7 B# l$ ^( s( U- ]+ X j
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static void sleep(struct rt_pm *pm, uint8_t mode) ^. W9 H- Q" X$ y
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switch (mode); G2 T3 V$ o0 f' ?, E
{
0 V i/ l% X! m6 mcase PM_SLEEP_MODE_NONE:
# r P# T6 l7 z; ~# ^% ]7 Tbreak;
6 Y" m) V! i! a- i. B% {1 zcase PM_SLEEP_MODE_IDLE:3 P7 h9 u+ {; S+ t" v
case PM_SLEEP_MODE_LIGHT:
" I+ D# K3 d) q( t4 L/* Enter SLEEP Mode, Main regulator is ON /( U" c q+ N0 J$ |
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);1 N0 b6 Y! ], s& i% g( E; b
break;/ }6 E: u# x( f& e2 C8 G# }) Z
case PM_SLEEP_MODE_DEEP:' c# ^/ Q3 E- E
/ Disable SysTick interrupt /
' C( r. a# r% c* ^) {7 y7 X7 iCLEAR_BIT(SysTick->CTRL, (rt_uint32_t)SysTick_CTRL_TICKINT_Msk);
; f% A6 @+ j* i# ?$ |* ~/ Enable the Ultra Low Power mode and the fast wake up /3 L; C% X0 r: c3 {( ^, m% Y
SET_BIT(PWR->CR, PWR_CR_ULP | PWR_CR_FWU);- Z r9 e9 c: U$ X2 v
/ Select HSI as system clock source after Wake Up from Stop mode /
: t3 v8 r/ z6 L. B//__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_HSI);- c+ h4 Y9 D+ v! b* v. h" m
/ Enter STOP mode /
$ _6 R+ e! V) d/ VHAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
( v# E% `6 F/ B$ ?/ Disable the Ultra Low Power mode and the fast wake up /% O! g* x+ }9 X7 C9 |
CLEAR_BIT(PWR->CR, PWR_CR_ULP | PWR_CR_FWU);
# G4 `- e4 p' [4 j& m) g/ Enable SysTick interrupt /5 ~0 a( f/ z& W% v+ h
SET_BIT(SysTick->CTRL, (rt_uint32_t)SysTick_CTRL_TICKINT_Msk);
9 W( p7 @& |# l7 j" p/ Re-configure the system clock /
0 m: D: X% `* G' wSystEMClock_ReConfig();/ x- u' j5 [5 r( U
break;
0 ~1 b% h( n+ ~ P5 N5 \8 icase PM_SLEEP_MODE_STANDBY:7 o. Q4 j! d/ j5 w! s& q3 }3 n( r/ u
case PM_SLEEP_MODE_SHUTDOWN:7 Q# {: I& F/ c! O3 Y1 \0 V2 \
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);$ e% Z) u ^4 ~0 w3 Q/ e
/ Enter STANDBY mode */
# ?! Y- D+ i2 y. s& w9 mHAL_PWR_EnterSTANDBYMode();
, C/ p3 x. l# j5 l* E Gbreak;! R9 f. h( i( ~0 h% V% X
default:7 c4 N7 _* ]2 J8 i ?
RT_ASSERT(0);
a2 o& g6 b! z5 jbreak;( h6 F1 h# y2 e! C: h x! a
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