51單片機(jī)的一個(gè)多線程編程模型

ID:88762 · 發(fā)表于 2021-10-28 18:14

Protothread 一個(gè)非常巧妙的輪詢式多線程模型，也是 contiki 系統(tǒng)的內(nèi)核，uip 和 lwip 作者 adam 的杰作

proteus8.12.SP0 居然都支持 STC 51 單片機(jī)和 STM32 模擬了。。可以去百度下載

常見(jiàn)問(wèn)題：
一、proteus 8.12_sp0和proteus_8.9sp2存在相同的問(wèn)題，如果安裝在非C盤目錄下，打開(kāi)后則會(huì)顯示密鑰錯(cuò)誤和未注冊(cè)的灰色字體；點(diǎn)擊幫助后也是未注冊(cè)。
這是因?yàn)槠平馄髂J(rèn)是你安裝在C盤。
解決方法如下：
[1]、卸載后重裝在C盤
[2]、1.先在C盤安裝，破解.
      2.打開(kāi)軟件，發(fā)現(xiàn)有注冊(cè)信息，則注冊(cè)成功
      3.此時(shí)軟件復(fù)制根目錄的bin文件夾。
      4.卸載剛才安裝的proteus
      注意：不要用第三方的卸載軟件，在控制面版里卸載就行，更不要用everything之類的把殘余文件刪的干干凈凈
      5.重新安裝，選擇D盤。破解
      6.把剛才復(fù)制bin文件夾覆蓋到D盤軟件的根目錄下，選擇全部替換
      7.再打開(kāi)proteus就顯示注冊(cè)成功了
-- 雖然有點(diǎn)脫褲子放屁的感覺(jué)，但能用就行

Protesu 仿真測(cè)試，兩個(gè)線程控制 LED 閃爍，另外還有 mutex timer 等，可以參考 contiki 的內(nèi)核實(shí)現(xiàn)。

示例工程：

STCxx_Projects.rar (169.57 KB, 下載次數(shù): 17)

單片機(jī)源程序如下:

/**
******************************************************************************
* @file main.c
* @author Iron
* @date 2021-01-01
* @version v1.0
* @brief main c file
*/
/* Private includes ----------------------------------------------------------*/
#include "board.h"
#include "pt.h"
#include "delay.h"
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Two flags that the two protothread functions use. */
static int protothread1_flag, protothread2_flag;
/* Private function prototypes -----------------------------------------------*/
/**
* The first protothread function. A protothread function must always
* return an integer, but must never explicitly return - returning is
* performed inside the protothread statements.
*
* The protothread function is driven by the main loop further down in
* the code.
*/
static int protothread1(struct pt *pt)
{
/* A protothread function must begin with PT_BEGIN() which takes a
pointer to a struct pt. */
PT_BEGIN(pt);
/* We loop forever here. */
while (1)
{
/* Wait until the other protothread has set its flag. */
PT_WAIT_UNTIL(pt, protothread2_flag != 0);
/* thread code... */
led_togger(LED0);
delay_ms(100);
/* We then reset the other protothread's flag, and set our own
flag so that the other protothread can run. */
protothread2_flag = 0;
protothread1_flag = 1;
/* And we loop. */
}
/* All protothread functions must end with PT_END() which takes a
pointer to a struct pt. */
PT_END(pt);
}
/**
* The second protothread function. This is almost the same as the
* first one.
*/
static int protothread2(struct pt *pt)
{
PT_BEGIN(pt);
while (1)
{
/* Let the other protothread run. */
protothread2_flag = 1;
/* Wait until the other protothread has set its flag. */
PT_WAIT_UNTIL(pt, protothread1_flag != 0);
/* thread code... */
led_togger(LED1);
delay_ms(100);
/* We then reset the other protothread's flag. */
protothread1_flag = 0;
/* And we loop. */
}
PT_END(pt);
}
/**
* Finally, we have the main loop. Here is where the protothreads are
* initialized and scheduled. First, however, we define the
* protothread state variables pt1 and pt2, which hold the state of
* the two protothreads.
*/
static struct pt pt1, pt2;
int main(void)
{
board_init();
/* Initialize the protothread state variables with PT_INIT(). */
PT_INIT(&pt1);
PT_INIT(&pt2);
/*
* Then we schedule the two protothreads by repeatedly calling their
* protothread functions and passing a pointer to the protothread
* state variables as arguments.
*/
while (1)
{
protothread1(&pt1);
protothread2(&pt2);
}
}
/**
* @}
*/

復(fù)制代碼

ID:646477 · 發(fā)表于 2021-10-29 18:39

贊一個(gè)，Protothread 用了幾年了，大大小小的項(xiàng)目，感覺(jué)都比較不錯(cuò)。除非有搶占式的需求，才會(huì)用上RTOS，總體來(lái)說(shuō)，還是對(duì)它比較親切

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51單片機(jī)的一個(gè)多線程編程模型

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