TencentOS-tiny 任务间通信（九）任务间通信（九）- 邮箱队列邮箱队列
一、任务间通信一、任务间通信
1、邮箱队列
概述
消息队列传递的是指针，邮箱队列传递的是大片的内存数据。
API讲解
编程实例
1、在tos_config.h中，配置邮箱队列组件开关TOS_CFG_MAIL_QUEUE_EN：
#define TOS_CFG_MAIL_QUEUE_EN 1u
2、编写main.c示例代码：
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "usart.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "cmsis_os.h"
#include "stdio.h"
#include "tos_k.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/*
这里演示如何使用邮箱队列在sender和receiver任务之间传递邮箱（此案例中邮件，也就是邮箱要传递的内存数据为一个
mail_t类型的结构体，从此案例中可以看出来，邮箱队列相对消息队列来说，可以传递更为复杂的内存块数据）
*/
#define STK_SIZE_TASK_RECEIVER 512
#define STK_SIZE_TASK_SENDER 512
#define PRIO_TASK_RECEIVER_HIGHER_PRIO 4
#define PRIO_TASK_RECEIVER_LOWER_PRIO (PRIO_TASK_RECEIVER_HIGHER_PRIO + 1)
#define MAIL_MAX 10
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
k_stack_t stack_task_receiver_higher_prio[STK_SIZE_TASK_RECEIVER];
k_stack_t stack_task_receiver_lower_prio[STK_SIZE_TASK_RECEIVER];
k_stack_t stack_task_sender[STK_SIZE_TASK_SENDER];
typedef struct mail_st {
char *message;
int payload;
} mail_t;
uint8_t mail_pool[MAIL_MAX * sizeof(mail_t)];
k_task_t task_receiver_higher_prio;
k_task_t task_receiver_lower_prio;
k_task_t task_sender;
k_mail_q_t mail_q;
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