CompBuffer_64 - Smartrek

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Prototype

CompBuffer_64 (r1, r2)

Description

Compare the values of two int64 stored in the buffer.

Return
return buffer[r1]>buffer[r2]?1 : (buffer[r1] == buffer[r2]?0 : -1 )

Code Example

The following code example uses the CompBuffer_64 function.

The SMK900.evi file used for this example can be downloaded at the bottom of this page.

/* Example Code
* CompBuffer_64
*
* get buffer indexes r1 and r2
* set buffer in memory
* if params used 
*   compare buffer[r1] to buffer[r2]
*   return result of compare (0xFF if "<", 0x00 if "=" or 0x01 if ">") on 8 bits
* else
*   compare buffer[r1] to buffer[r2], buffer[r1] to buffer[r1] and buffer[r2] to buffer[r1]
*   return results of 3 compares on 3*8 bits
*
* example VMExecuteCmd:
* cmd:                                                             |r1       |r2       |buffer
*       0xfb 0x0e 0x00 0x0c 0x00 0x0e [0x?? 0x?? 0x?? = macAdress] 0x00 0x00 0x01 0x00 0x01 0x01 0x02 0x02 0x03 0x03 0x04 0x04 0x05
* rsp:  0xfb 0x08 0x00 0x2d 0x00 0xe1 0x1e 0xff
*/
 
 
#include "SMK900.evi"
 
#define SENSORCODE 0x01
 
function exec_aircmd(){
    local rxLen;
    local useParams;
    local idx1,idx2;
    local i;
    local result1,result2,result3;
     
    rxLen=GetAirBuf(0, 0, 20);
     
    if(rxLen>=13){ // 1 byte for paketID + 12 bytes of payload (4 bytes for buffer indexes and minimum 8 bytes for buffer)
        useParams=true;
        idx1=GetBuffer_16(1);
        idx2=GetBuffer_16(3);
        for(i=5;i<rxLen;i++){
            SetBuffer(i-5,GetBuffer_S8(i),1);
        }
    }else{
        useParams=false;
        idx1=0;
        idx2=8;
         
        SetBuffer_16(0,0x0000);
        SetBuffer_16(2,0x9000);
        SetBuffer_16(4,0x5678);
        SetBuffer_16(6,0x1234);
         
        SetBuffer_16(8,0x6789);
        SetBuffer_16(10,0x2345);
        SetBuffer_16(12,0x0001);
        SetBuffer_16(14,0x0000);
    }
     
    result1 = CompBuffer_64(idx1,idx2);
 
    if(useParams){
        SetBuffer(0,result1,1);
        Send(1);    
    }else{
        result2 = CompBuffer_64(idx1,idx1);
        result3 = CompBuffer_64(idx2,idx1);
        SetBuffer(0,result1,1);
        SetBuffer(1,result2,1);
        SetBuffer(2,result3,1);
        Send(3);    
    }   
}
 
function main() 
{
    local execType;
     
    execType = GetExecType();
    if(execType==MESHEXECTYPE_AIRCMD_bm){
        exec_aircmd();
    }
}

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Attachments

SMK900 (20 KB)

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