ESP32S3 gptimer 初始化问题

配置定时器警报一秒一次，在中断中通过信号量传递给处理任务，在定时器初始化时需要注意一个问题：

timer_config.intr_priority = 0; 该成员必须配置，设置为0 系统会分配给一个较低的优先级，如果不配置会重启报错：

E (811) gptimer: gptimer_new_timer(115): invalid interrupt priority:-2113815094

测试程序：

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "freertos/semphr.h"
#include "driver/gptimer.h"
#include "esp_log.h"

static const char *TAG = "example";

SemaphoreHandle_t BinarySem_Handle;

static bool IRAM_ATTR gptimer_callback(gptimer_handle_t timer, const gptimer_alarm_event_data_t *edata, void *user_data)
{
	BaseType_t xHigherPriorityTaskWoken = pdFALSE;

	/* 重新配置报警值 */
	gptimer_alarm_config_t alarm_config = {
		.alarm_count = edata->alarm_value + 1000000, /* 在接下来的1秒内报警 */
	};
	gptimer_set_alarm_action(timer, &alarm_config);

	xSemaphoreGiveFromISR(BinarySem_Handle, &xHigherPriorityTaskWoken); //发送二值信号量

	/* 返回是否需要在ISR结束时让步 */
	return xHigherPriorityTaskWoken == pdTRUE;
}

void init_gptimer(void)
{
	gptimer_handle_t gptimer = NULL;
	gptimer_config_t timer_config;
	gptimer_alarm_config_t alarm_config;

	timer_config.clk_src = GPTIMER_CLK_SRC_DEFAULT; //选择 APB 作为默认选项
	timer_config.direction = GPTIMER_COUNT_UP; 		//向上计数，即从 0 到 65535
	timer_config.resolution_hz = 1000000; 			//设置内部计数器的分辨率。计数器每滴答一次相当于 1 / resolution_hz 秒
	timer_config.flags.intr_shared = false;
	timer_config.intr_priority = 0; 				//注意这里一定要写，否则会重启

	ESP_LOGI(TAG, "init_gptimer");

	//实例化定时器实例并返回定时器句柄
	ESP_ERROR_CHECK(gptimer_new_timer(&timer_config, &gptimer));

	gptimer_event_callbacks_t cbs;
	cbs.on_alarm = gptimer_callback;
	ESP_ERROR_CHECK(gptimer_register_event_callbacks(gptimer, &cbs, NULL));

	//使能定时器
	ESP_ERROR_CHECK(gptimer_enable(gptimer));

	//设置报警
	alarm_config.alarm_count = 1000000; // period = 1s
	ESP_ERROR_CHECK(gptimer_set_alarm_action(gptimer, &alarm_config)); //配置定时器报警
	ESP_ERROR_CHECK(gptimer_start(gptimer)); //开始定时器

}

void alarm_dispose(void)
{
	BaseType_t xReturn = pdPASS;

	while(1)
	{
		xReturn = xSemaphoreTake(BinarySem_Handle, portMAX_DELAY);

		if(pdTRUE == xReturn)
		{

			printf("gptimer alarm\n");
		}
	}
}

void app_main(void)
{
	uint32_t i= 0;

	//创建一个二值信号量
	BinarySem_Handle = xSemaphoreCreateBinary();

	xTaskCreate((TaskFunction_t)alarm_dispose, "alarm_dispose", 2048, NULL, 1, NULL);

	init_gptimer();

	ESP_LOGI(TAG, "Hello World");

	while(1)
	{

		printf("run %lu\n", i);
		++i;
		vTaskDelay(500);
	}

}