P. Expert I2C Bean problem.

[ecotecsa]

Hello everybody,

JM60 I2C module connected to TMP100 I2C Temperature sensor.

Problem is that process   EI2C1_RecvBlock(data,2,Rcv);     disable my Port A when is  excecuted.

All other comunication process with TMP100 temperature sensor work perfectly.

Part of code:

int  Read_Temp (){
  
   int Tph,Tpl;
   error=EI2C1_SelectSlave(0x48);           
   Pointer=0x00;
   error=EI2C1_SendChar(Pointer);            
   error=EI2C1_RecvBlock(data,2,Rcv);     // Here disable Port A (in *Rcv0=                                                  

   Temph=*data;                             
   Templ=*(data+1);                             
   Tph=(int)Temph;
   Tpl=(int)Templ;
   Tph <<= 4;
   Tpl >>= 4;
   Temp=Tph|Tpl;
  
   PTADD=0x18;                              //Enable PTAD because
   PTAD=0x18;                               // RecvBlock disable  this
   return (Temp);
 }

Thank you very much for suggestions.

Best Regards

Eduardo.

[CompilerGuru]

What is data? Is it a NULL pointer?

The reason I ask is that PTAD/PTADD happen to be at address 0/1, so could it be that you are using the port registers as data buffer?

[ecotecsa · Accepted solution]

Hi Compilerguru,

I was defined:

byte Datos[128];

and

data=&Datos[0];  // in main

Then

int leo_Temp { ...}

Thank you

Eduardo

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