[ ST NUCLEO-U575ZI-Q 测评] FREERTOS - 结构体多参数传递

lugl4313820

[ ST NUCLEO-U575ZI-Q 测评] FREERTOS - 结构体多参数传递 [复制链接]

这次的例程是创建两个LED闪烁的程序，闪烁时间各不相同，如何做到同一程序，传入不同参数来实现功能呢？

先写一个任务创建函数，用指针来接收结构体数据。

void ledFlash(void *pt){
  LEDFLASH *ptLedFlash = (LEDFLASH *)pt;
  byte pin = ptLedFlash->pin;
  int delayTime = ptLedFlash->delayTime;

  pinMode(pin,OUTPUT);
  while(1){
    digitalWrite(pin,!digitalRead(pin));
    vTaskDelay(delayTime);
  }
}

为了给任务创建时传递多个参数，这里用结构体来传递多个参数。

typedef struct {
  byte pin;
  int delayTime;
} LEDFLASH;

setup函数：

void setup() {
  Serial.begin(115200);
  led1.pin = PB7;
  led1.delayTime = 200;
  led2.pin = PC7;
  led2.delayTime = 500;

  if(xTaskCreate(ledFlash,
                  "FLASH LED",
                  1024,
                  (void *)&led1,
                  6,
                  NULL) == pdPASS)
    Serial.println("led1,flash task Created.");
  
  if (xTaskCreate(ledFlash,
                  "Flash LED.",
                  1024,
                  (void *)&led2,
                  6,
                  NULL) == pdPASS)
    Serial.println("led2 flash task Created.");
  vTaskStartScheduler();
}

这样就实现了同一个任务接收不一样的参数，实现不同的功能，整体程序如下：

#include <Arduino.h>
#include <STM32FreeRTOS.h>

typedef struct {
  byte pin;
  int delayTime;
} LEDFLASH;

void ledFlash(void *pt){
  LEDFLASH *ptLedFlash = (LEDFLASH *)pt;
  byte pin = ptLedFlash->pin;
  int delayTime = ptLedFlash->delayTime;

  pinMode(pin,OUTPUT);
  while(1){
    digitalWrite(pin,!digitalRead(pin));
    vTaskDelay(delayTime);
  }
}

LEDFLASH led1,led2;

void setup() {
  Serial.begin(115200);
  led1.pin = PB7;
  led1.delayTime = 200;
  led2.pin = PC7;
  led2.delayTime = 500;

  if(xTaskCreate(ledFlash,
                  "FLASH LED",
                  1024,
                  (void *)&led1,
                  6,
                  NULL) == pdPASS)
    Serial.println("led1,flash task Created.");
  
  if (xTaskCreate(ledFlash,
                  "Flash LED.",
                  1024,
                  (void *)&led2,
                  6,
                  NULL) == pdPASS)
    Serial.println("led2 flash task Created.");
  vTaskStartScheduler();
}

void loop() {
  // put your main code here, to run repeatedly:
}

上传给开发板后实现两个LED按不同的频率闪烁。

 

2022-12-13 16.15拍摄的影片

 

 

damiaa

arduino真好

lugl4313820

damiaa 发表于 2022-12-13 19:36 arduino真好

谢谢！

okhxyyo

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