I have a problem sending data and receiving data, helpppppp

Mbed OS
1

I am sending data and receiving data from hercules. So, I want to receive some data from Hercules and display that data in Hercules, but I have several problems. Este es el codigo:

#include “mbed.h”
#include “BufferedSerial.h”

Mutex p_serie;

//declaraciones de pines
BufferedSerial pc(USBTX, USBRX);

//prototipos de las funciones
void recibir_datos_serie(void);

//tareas
Thread hilo_recibir_datos_serie(osPriorityNormal, 2048);

//variables globales
char men[50];

// main() runs in its own thread in the OS
int main()
{
hilo_recibir_datos_serie.start(recibir_datos_serie);

sprintf(men, "Inicializando programa...\n\r");
pc.write(men, sizeof(men));

}

void recibir_datos_serie(void){
char leer_dato[1];
while (true) {
p_serie.lock(); // Bloquear el acceso al puerto serie para evitar condiciones de carrera

    if (pc.readable()) {
        pc.read(leer_dato, sizeof(leer_dato));
        printf(men, "\n\r");
        pc.write(leer_dato, sizeof(leer_dato)); // Eco de vuelta de los datos recibidos
    }
    
    p_serie.unlock(); // Desbloquear el acceso al puerto serie
    ThisThread::sleep_for(10ms); // Esperar un corto período de tiempo antes de la próxima lectura
}

}

Problems:

  • this phrase “Inicializando programa…”, in main(), I can only see it when I send data, and I need to see it before, when the program starts, it should be like this.
    -When I send the data and show it in Hercules, it appears twice, why?

This is what comes out in Hercules:

image
image625×546 13.6 KB

2

Hello,

probably because you print the mem variable in the block below and because use BufferedSerial on same UART which is dedicated for default console (printf) .

It will be solved as soon as you remove this line - printf(men, "\n\r");

BR, Jan

1 Like
3

I removed the line you said, but it doesn’t print the phrase when the program starts and it doesn’t print it when I send the data.

image
image921×543 36 KB

4

OK I probably badly understood your requirements.

  1. Values are in Hercules twice because one color is your input, what you send form Hercules to the device. And second color is echo from your device, what Hercules received from the device.
  2. I am not sure why the sentence is missed at the beginning but your main is not in correct logic I think.

Try main like this.

#define MY_DEBUG 1 // switch debug msg ON/OFF

int main()
{
   debug_if(MY_DEBUG , "Debug: Mbed start\n"); 

   // 1. start second thread
   debug_if(MY_DEBUG , "Debug: second thread start\n"); 
   hilo_recibir_datos_serie.start(recibir_datos_serie);

   // 2. let main thread run
   debug_if(MY_DEBUG , "Debug: main loop start\n");
   while(1){
      thread_sleep_for(1000);
      debug_if(DEBUG, "Debug: loop\n");
   }
}

in funcion

void recibir_datos_serie(void){
   sprintf(men, "Inicializando programa...\n\r");
   pc.write(men, sizeof(men));

   char leer_dato[1];
   while (true) {
      p_serie.lock(); // Bloquear el acceso al puerto serie para evitar condiciones de carrera

      if (pc.readable()) {
         pc.read(leer_dato, sizeof(leer_dato));
         //sprintf(men, "Inicializando programa...\n\r");
         pc.write(men, sizeof(men));
         pc.write(leer_dato, sizeof(leer_dato)); // Eco de vuelta de los datos recibidos
      }
    
      p_serie.unlock(); // Desbloquear el acceso al puerto serie
      ThisThread::sleep_for(10ms); // Esperar un corto período de tiempo antes de la próxima lectura
   }
}

BR, Jan