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esp_timer: reduce overflow value in unit tests

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This allows testing for race conditions which occur near timer
overflow point more effectively.
This commit is contained in:
Ivan Grokhotkov
2018-05-23 22:39:49 +08:00
committed by bot
parent 125bbf0882
commit 141e51b468
3 changed files with 53 additions and 1 deletions
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27
components/esp32/esp_timer_esp32.c
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@@ -82,7 +82,18 @@
* ISR happens follow set_alarm, so change the ALARM_OVERFLOW_VAL to resolve this problem.
* Set it to 0xefffffffUL. The remain 0x10000000UL(about 3 second) is enough to handle ISR.
*/
#define ALARM_OVERFLOW_VAL 0xefffffffUL
#define DEFAULT_ALARM_OVERFLOW_VAL 0xefffffffUL
/* Provision to set lower overflow value for unit testing. Lowering the
* overflow value helps check for race conditions which occur near overflow
* moment.
*/
#ifndef ESP_TIMER_DYNAMIC_OVERFLOW_VAL
#define ALARM_OVERFLOW_VAL DEFAULT_ALARM_OVERFLOW_VAL
#else
static uint32_t s_alarm_overflow_val = DEFAULT_ALARM_OVERFLOW_VAL;
#define ALARM_OVERFLOW_VAL (s_alarm_overflow_val)
#endif
static const char* TAG = "esp_timer_impl";
@@ -379,3 +390,17 @@ uint64_t IRAM_ATTR esp_timer_impl_get_min_period_us()
{
return 50;
}
#ifdef ESP_TIMER_DYNAMIC_OVERFLOW_VAL
uint32_t esp_timer_impl_get_overflow_val()
{
return s_alarm_overflow_val;
}
void esp_timer_impl_set_overflow_val(uint32_t overflow_val)
{
s_alarm_overflow_val = overflow_val;
/* update alarm value */
esp_timer_impl_update_apb_freq(esp_clk_apb_freq() / 1000000);
}
#endif // ESP_TIMER_DYNAMIC_OVERFLOW_VAL