esp32 硬件定时器计数器设置向下计数，会无限重启是怎么回事？

[hello_galaxy]

环境是esp-idf v4.4.3,用的是官方的timer_group例程
修改如下

Code: Untitled.c Select all

timer_config_t config = {

        .divider = TIMER_DIVIDER,

        .counter_dir = TIMER_COUNT_DOWN,

        .counter_en = TIMER_PAUSE,

        .alarm_en = TIMER_ALARM_EN,

        .auto_reload = auto_reload,

    }; // default clock source is APB

    timer_init(group, timer, &config);

...

 timer_set_counter_value(group, timer, timer_interval_sec * TIMER_SCALE);