首页 › M5Stack › UART串口透传，猛男必备的串口从机调试工具！

是少翔啊 发表于 2020-3-19 21:12

UART串口透传，猛男必备的串口从机调试工具！

UART串口透传应用简介

没错！我就是标题党！正在调试串口从机的你恰好发现身边没有TTL to USB的串口转换器，却有多一个M5GO（或是其他M5设备）。不要慌！问题不大！简单的说，你只需要将你的M5GO作为串口中转站，你可以通过PC端的串口工具直接发送指令，经过M5GO转发至其他串口通信从机，实现数据透传功能。（还可以中途切换串口引脚和波特率哦）


下面是Github：
https://github.com/Gitshaoxiang/Project_example/tree/master/uart_pass_through



我是代码：


//Reset resistance is not soldered. If necessary, weld it yourself.

#include <M5Stack.h>

#define RESET_PIN   5   


bool status_flag = true;
int UART_PIN_SELECT = 0;
int UART_BAUD_SELECT = 0;
int UART_PIN_LIST= {{16,17},{22,21},{36,26}};
int UART_BAUD_LIST[] = {115200,961200,9600};
int RX_PIN = 16;
int TX_PIN = 17;
int BAUD = 115200;


void display_init() {
M5.Lcd.fillRect(0, 27, 320, 190, BLACK);
M5.Lcd.fillRect(0, 0, 320, 27, BLUE);
M5.Lcd.setTextColor(WHITE, BLUE);
M5.Lcd.setCursor(14, 60);
M5.Lcd.drawTriangle(280, 100, 230, 120, 230, 80, GREEN);
M5.Lcd.drawTriangle(160, 100, 210, 120, 210, 80, GREEN);
M5.Lcd.drawString("Select-RX/TX",25, 220, 2);
M5.Lcd.drawString("Select-BAUD",125, 220, 2);
M5.Lcd.drawString("UART PASS THROUGH.",0, 0, 4);
M5.Lcd.drawString(" RX : G"+String(RX_PIN)+" ",14, 60, 4);
M5.Lcd.drawString(" TX : G"+String(TX_PIN)+" ",14, 110, 4);
M5.Lcd.drawString(" BAUD RATE : "+String(BAUD)+" ",14, 160,4);

}

void Change_UART_status(){
Serial.write("Reseting UART");
Serial2.flush();
Serial2.end();
display_init();
Serial.print(String(BAUD)+String(SERIAL_8N1)+String(RX_PIN)+String(TX_PIN));
Serial2.begin(BAUD, SERIAL_8N1, RX_PIN, TX_PIN);
Serial.write("UART already reseted");
}


void setup() {
M5.begin();
M5.Lcd.setTextFont(2);
M5.Lcd.setTextColor(TFT_WHITE, TFT_BLACK);
// Host serial communication
Serial.begin(115200);   

// SIM800L serial communication
Serial2.begin(BAUD, SERIAL_8N1, RX_PIN, TX_PIN);   
pinMode(RESET_PIN, OUTPUT);
display_init();
}

void loop() {

//AT instruction write
if(Serial.available()){
    M5.Lcd.fillTriangle(280, 100, 230, 120, 230, 80, GREEN);
    Serial2.write(Serial.read());
}else{
    M5.Lcd.fillTriangle(280, 100, 230, 120, 230, 80, BLACK);
    M5.Lcd.drawTriangle(280, 100, 230, 120, 230, 80, GREEN);
}
//AT instruction result
if(Serial2.available()){
    M5.Lcd.fillTriangle(160, 100, 210, 120, 210, 80, GREEN);
    Serial.write(Serial2.read());
}else{
    M5.Lcd.fillTriangle(160, 100, 210, 120, 210, 80, BLACK);
    M5.Lcd.drawTriangle(160, 100, 210, 120, 210, 80, GREEN);
}

if(M5.BtnA.wasPressed()){
    if(UART_PIN_SELECT<2){
      UART_PIN_SELECT++;
    }else{
      UART_PIN_SELECT = 0;
    }
    RX_PIN = UART_PIN_LIST;
    TX_PIN = UART_PIN_LIST;
    Change_UART_status();
}

if(M5.BtnB.wasPressed()){
    if(UART_BAUD_SELECT<2){
      UART_BAUD_SELECT++;
    }else{
      UART_BAUD_SELECT = 0;
    }
    BAUD = UART_BAUD_LIST;
    Change_UART_status();
}
M5.update();
}

沧海笑1122 发表于 2020-3-23 15:54

虽然标题吸引人，内容更是硬核，值得收藏。uart/serial/屏显等知识点。感谢分享。

是少翔啊 发表于 2020-4-9 19:57

沧海笑1122 发表于 2020-3-23 15:54
虽然标题吸引人，内容更是硬核，值得收藏。uart/serial/屏显等知识点。感谢分享。 ...

抱拳了老铁

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