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

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1. timer_config_t config = {
2.         .divider = TIMER_DIVIDER,
3.         .counter_dir = TIMER_COUNT_DOWN,
4.         .counter_en = TIMER_PAUSE,
5.         .alarm_en = TIMER_ALARM_EN,
6.         .auto_reload = auto_reload,
7.     }; // default clock source is APB
8.     timer_init(group, timer, &config);
9. ...
10.  timer_set_counter_value(group, timer, timer_interval_sec * TIMER_SCALE);

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