Crash_Override/OVMS3-idf
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Merge branch 'bufgix/esp_timer_set_alarm_v3.3' into 'release/v3.3'

Browse source 
esp_timer: Fix set_alarm. Case when timestamp < now_time (v3.3)

See merge request espressif/esp-idf!6997
This commit is contained in:
Jiang Jiang Jian 2019-12-16 19:40:52 +08:00
parent 97dba89daf d071cd11c8
commit de9fd03b3e
2 changed files with 21 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
components/esp32/esp_timer_esp32.c
View file

@ -216,7 +216,7 @@ void IRAM_ATTR esp_timer_impl_set_alarm(uint64_t timestamp)
// Note that if by the time we update ALARM_REG, COUNT_REG value is higher,
// interrupt will not happen for another ALARM_OVERFLOW_VAL timer ticks,
// so need to check if alarm value is too close in the future (e.g. <2 us away).
const uint32_t offset = s_timer_ticks_per_us * 2;
const int32_t offset = s_timer_ticks_per_us * 2;
do {
// Adjust current time if overflow has happened
if (timer_overflow_happened()) {
@ -224,7 +224,7 @@ void IRAM_ATTR esp_timer_impl_set_alarm(uint64_t timestamp)
s_time_base_us += s_timer_us_per_overflow;
}
s_mask_overflow = false;
uint64_t cur_count = REG_READ(FRC_TIMER_COUNT_REG(1));
int64_t cur_count = REG_READ(FRC_TIMER_COUNT_REG(1));
// Alarm time relative to the moment when counter was 0
int64_t time_after_timebase_us = (int64_t)timestamp - s_time_base_us;
// Calculate desired timer compare value (may exceed 2^32-1)

19
components/esp32/test/test_esp_timer.c
View file

@ -4,6 +4,7 @@
#include <sys/time.h>
#include <sys/param.h>
#include "unity.h"
#include "soc/frc_timer_reg.h"
#include "esp_timer.h"
#include "esp_heap_caps.h"
#include "freertos/FreeRTOS.h"
@ -779,3 +780,21 @@ TEST_CASE("esp_timer_impl_set_alarm and using start_once do not lead that the Sy
}
#endif // !defined(CONFIG_FREERTOS_UNICORE) && defined(CONFIG_ESP32_DPORT_WORKAROUND)
TEST_CASE("Test case when esp_timer_impl_set_alarm needs set timer < now_time", "[esp_timer]")
{
REG_WRITE(FRC_TIMER_LOAD_REG(1), 0);
esp_timer_impl_advance(50331648); // 0xefffffff/80 = 50331647
ets_delay_us(2);
portDISABLE_INTERRUPTS();
esp_timer_impl_set_alarm(50331647);
uint32_t alarm_reg = REG_READ(FRC_TIMER_ALARM_REG(1));
uint32_t count_reg = REG_READ(FRC_TIMER_COUNT_REG(1));
portENABLE_INTERRUPTS();
const uint32_t offset = 80 * 2; // s_timer_ticks_per_us
printf("alarm_reg = 0x%x, count_reg 0x%x\n", alarm_reg, count_reg);
TEST_ASSERT(alarm_reg <= (count_reg + offset));
}