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clock: [#55] Overflow handling for FreeRTOS stats.

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RedHawk 2023-05-29 20:01:35 +03:00
parent 70f0c7d8ca
commit cb31fc4009
2 changed files with 17 additions and 2 deletions
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3
source/shoh/freertos/FreeRTOSConfig.h
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@ -126,9 +126,10 @@ to exclude the API function. */
* must set up LPC_SCT1.
*/
void vConfigureTimerForRunTimeStats(void);
unsigned long ulGetTimeForRunTimeStats(void);
#define portCONFIGURE_TIMER_FOR_RUN_TIME_STATS() vConfigureTimerForRunTimeStats()
/* The value is read directly from the counter register for efficiency and low overhead. */
#define portGET_RUN_TIME_COUNTER_VALUE() LPC_SCT1->COUNT_U
#define portGET_RUN_TIME_COUNTER_VALUE() ulGetTimeForRunTimeStats()
/* Cortex-M specific definitions. */
#ifdef __NVIC_PRIO_BITS

16
source/shoh/src/peripherals/Clock.cpp
View File

@ -29,7 +29,7 @@ extern "C" {
/**
* @brief This function is used by FreeRTOS to configure the collection of
* time used by tasks.
* time used by tasks. (This timer is also used for logging timestamps.)
*/
void
vConfigureTimerForRunTimeStats (void)
@ -55,6 +55,20 @@ extern "C" {
LPC_SCT1->CONFIG = SCT_CONFIG_32BIT_COUNTER;
LPC_SCT1->CTRL_U = SCT_CTRL_CLRCTR_L;
}
/**
* @brief Used by FreeRTOS to collect runtime statistics.
* @paragraph FreeRTOS is unable to handle the counter overflow, so it must be done from our side.
* This solution will break eventually later on, presumably after 1193 hours of runtime,
* since unsigned long won't be able to hold more than that amount of milliseconds.
* FreeRTOS expects to get unsigned long, so there's nothing more that can be done.
* @return unsigned long
*/
unsigned long ulGetTimeForRunTimeStats(void)
{
return (unsigned long)(((double)(counter_overflows - 1) * max_counter_value) + LPC_SCT1->COUNT_U)
/ ((double)Chip_Clock_GetMainClockRate() / 1000);
}
}
/**