/* Includes ----------------------------------------------------------------- */ #include "task\user_task.h" // #include "device/pc.h" #include "usart.h" #include "bsp\led.h" /* Private variables -------------------------------------------------------- */ float distance = 0.0f; // 用于存储距离数据单位为米 /* Exported functions ------------------------------------------------------- */ void Task_PC(void *argument) { (void)argument; // 消除未使用参数的警告 const uint32_t delay_tick = osKernelGetTickFreq() / 50; // 50Hz uint32_t tick = osKernelGetTickCount(); /* 控制任务运行频率的计时 */ while (1) { tick += delay_tick; /* 计算下一个唤醒时刻 */ if (osMessageQueueGet(task_runtime.msgq.pc, &distance, NULL, osWaitForever) == osOK) { HAL_UART_Transmit_DMA(&huart3, (uint8_t *)&distance, sizeof(distance)); // 发送数据 } osDelayUntil(tick); /* 运行结束,等待下一次唤醒 */ } }