ADHEETH VK

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7 years, 6 months ago.

attach function not working with Hexiwear

I am writing a serial application with Hexiwear platform . I am trying to configure gsm modem using uart communication. I am sending AT commands to gsm modem and the response from modem will be stored in buffer.

I used attach() function in Serial class to attach a function ( rec() ) . The code i used is,

main.cpp

#include "mbed.h"

Serial pc(USBTX, USBRX);
Serial gsm( PTD3,PTD2);
unsigned char buffer[256];
int counter = 0 ;

void rec() { 
        pc.printf("in rec\r\n");                                            
        if(counter<=255){
        buffer[counter]=gsm.getc();                                
        counter++;       
        }                                        
        else counter =0;
}


void Init()
{
    pc.printf("init\r\n"); 
    gsm.baud(115200);
    gsm.format(8, Serial::None, 1);
    pc.baud(115200);
    pc.format(8, Serial::None, 1);
    gsm.attach(&rec);
    
}
main()
{  
   Init();
   int j=0,i=0;
   const char at[ ] = "ATI\r";
         
    for(j=0;j<4;j++)
    {
        gsm.putc(at[j]);  
    }

   for ( i=0; i<counter; i++) {                             
            pc.putc(buffer[i]);                                 
        } 
}

The problem i am facing is that rec() function is never called even though the AT command is successfully send. Please help me with a solution. Thanks

i solved the issue by using latest available mbed library. earlier i used the hexiwear serial example and added code up on it . With that library (mbed-os) attach is not working.

posted by ADHEETH VK 05 Jul 2017

1 Answer

Terry Koziniec
7 years, 5 months ago.

I know this is an old question but I would suggest starting with the Simple attach example. If that works, build your code up from that base incrementally. In my case, the example file hangs a MAX32630FTHR when it triggers. Let us know how it goes.

Accepted Answer