之前我們從0開始新建了一個簡單的Zephyr應(yīng)用-從0開始打造屬于自己的HelloWorld，本期就帶著大家熟悉一下Zephyr的shell和log系統(tǒng)。

首先給大家介紹Zephyr log系統(tǒng)的使用，在使用log前需要：

CONFIG_LOG=y

#include 
#include 


LOG_MODULE_REGISTER(main);


int main(void)
{
    int32_t count = 0;


    printk("Hello Zephyr!
");


    while (1)
    {   
         LOG_INF("Hello from main : %d", count++);
         k_sleep(K_MSEC(1000));
    }
    
    return 0;
}

接下來是shell的使用，同樣的首先要打開shell功能：

CONFIG_LOG=y

CONFIG_SHELL=y

CONFIG_LOG=y
CONFIG_LOG_CMDS=y
CONFIG_SHELL=y
CONFIG_SHELL_PROMPT_UART="shell>"
CONFIG_SHELL_VT100_COLORS=y
CONFIG_KERNEL_SHELL=y
CONFIG_THREAD_MONITOR=y
#add a reboot command
CONFIG_REBOOT=y

#include 
static int monkey_handler(const struct shell *shell, 
                      size_t argc,
                      char **argv)
{
   ARG_UNUSED(argc);
   ARG_UNUSED(argv);
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"                 ██████████████████████████            
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"               ██??????????????????????????██          
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"               ██????????????????????????????██        
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"             ██??????????????????????????????██        
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"         ██████????????????????????????????????██      
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"       ██??????????????????????????????????????██████  
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"       ██??????????????????????????????????????██????██
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"       ██??????????????????██????????██????????██????██
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"         ████??????????????██????????██????????██████  
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"             ██????????????????????????????????██      
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"     ████      ██????????????????????????????██        
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"   ██    ██      ██????????????????????????██          
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"   ██  ██      ██????????????????????????????██        
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"   ██          ██????????????????????????????██        
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"     ████    ██????????????????????????????????██      
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"         ██████????????????????????????????????██      
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"             ██????██????????????????????██????██      
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"               ██████????????????????????██████        
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"                   ██??????████████??????██            
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"                   ██????██        ██????██            
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"                   ██████            ██████            
");
   shell_fprintf(shell,SHELL_VT100_COLOR_YELLOW,"
");
   shell_fprintf(shell,SHELL_VT100_COLOR_CYAN,"                          I'm Super
");
      
   return 0;
}
SHELL_CMD_REGISTER(monkey, NULL, "I'm super.", monkey_handler);

這里我們通過SHELL_CMD_REGISTER聲明了一個叫做monkey的指令，其處理函數(shù)是monkey_handler, 會打印一個黃色猴子：

這樣，我們就介紹完了shell和log系統(tǒng)的添加。在上一期中，我們只添加了一個main.c，在本期我們?yōu)榇蠹已a一個如果添加額外的一個.c文件，需要干兩件事兒：

cmake_minimum_required(VERSION 3.20.0)


find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})


project(hello_world)


target_sources(app PRIVATE src/main.c)
target_sources(app PRIVATE src/t2.c)

#include 
#include 


// Thread configuration
#define CONFIG__T2_TH_STACK_SIZE 2048
#define CONFIG__T2_TH_PRIORITY 5


void t2_thread_task(void *, void *, void *);


K_THREAD_DEFINE(t2_thread, CONFIG__T2_TH_STACK_SIZE,
                t2_thread_task, NULL, NULL, NULL,
                CONFIG__T2_TH_PRIORITY, 0, 0);


LOG_MODULE_REGISTER(t2);


void t2_thread_task(void *, void *, void *)
{
    while (1)
    {
        LOG_INF("Hello from T2!");
        k_sleep(K_MSEC(500));
    }
}

這樣，即便我們后面有更復(fù)雜的工程需要添加更多的.c文件，我們也能游刃有余，處理得當(dāng)??！

恩智浦半導(dǎo)體NXP Semiconductors N.V.(納斯達克股票代碼：NXPI)是汽車、工業(yè)物聯(lián)網(wǎng)、移動設(shè)備和通信基礎(chǔ)設(shè)施市場值得信賴的合作伙伴，致力于提供創(chuàng)新解決方案。