Hello,
I'm facing an issue with xtimer_usleep function. All is working fine for a
while but ramdomly, this function never returns, and my task stays blocked.
Actually, this is because the callback that is supposed to unlock the mutex
is never called. I have investigated and i saw that in xcore_timer.c:464,
the second argument of the while is always false.
I don't think this is the same issue as #7347
<https://github.com/RIOT-OS/RIOT/issues/7347>. I tried to modified
XTIMER_BACKOFF but without any success.
Here is my clock configuration :
*`#define CLOCK_HSI (16000000U) /* internal
oscillator */*
*#define CLOCK_CORECLOCK (16000000U) /* desired core clock
frequency */*
*/* configuration of PLL prescaler and multiply values */*
*/* CORECLOCK := HSI / CLOCK_PLL_DIV * CLOCK_PLL_MUL */*
*#define CLOCK_PLL_DIV RCC_CFGR_PLLDIV4*
*#define CLOCK_PLL_MUL RCC_CFGR_PLLMUL4*
*/* configuration of peripheral bus clock prescalers */*
*#define CLOCK_AHB_DIV RCC_CFGR_HPRE_DIV8 /* AHB clock -> 2MHz
*/*
*#define CLOCK_APB2_DIV RCC_CFGR_PPRE2_DIV1 /* APB2 clock -> 2MHz
*/*
*#define CLOCK_APB1_DIV RCC_CFGR_PPRE1_DIV1 /* APB1 clock -> 2MHz
*/*
*/* configuration of flash access cycles */*
*#define CLOCK_FLASH_LATENCY FLASH_ACR_LATENCY*
*/* bus clocks for simplified peripheral initialization, UPDATE MANUALLY!
*/*
*#define CLOCK_AHB (CLOCK_CORECLOCK / 8)*
*#define CLOCK_APB2 (CLOCK_CORECLOCK / 8)*
*#define CLOCK_APB1 (CLOCK_CORECLOCK / 8)*
*#define ENABLE_LSI (1)*
*/***
* * @name Timer configuration*
* * @{*
* */*
*static const timer_conf_t timer_config[] = {*
* {*
* .dev = TIM2,*
* .max = 0x0000ffff,*
* .rcc_mask = RCC_APB1ENR_TIM2EN,*
* .bus = APB1,*
* .irqn = TIM2_IRQn*
* }*
*};*
*#define TIMER_0_ISR isr_tim2*
*#define TIMER_NUMOF (sizeof(timer_config) /
sizeof(timer_config[0]))`*
I have reduced all clocks to save power. I'm working on a stm32l073.
If you have any ideas about this issue, feel free to share your thoughts :)
Thank you in advance,
Aurélien
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