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InvBuffer_S32

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Estimated reading time: 1 min
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Prototype

InvBuffer_S32(r)

Description

WriteI32ToBuffer(rBuffer+r, -ReadBufferToI32(rBuffer+r));
Invert the int32 at index r of the buffer.

Return
Nothing

Code Example

The following code example uses the InvBuffer_S32 function to invert the int32 stored in a buffer at index r.

The SMK900.evi file used for this example can be downloaded at the bottom of this page.
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/* Example Code
* InvBuffer_S32
*
* get buffer indexes r1
* set buffer in memory
* inv buffer[r1]
* if params used
*   return result of inv on 32 bits
* else
*   return 0x00 (inv not ok) or 0x01 (inv ok) on 8 bits
*
* example VMExecuteCmd:
* cmd:                                                             |r1       |buffer
*       0xfb 0x0e 0x00 0x0c 0x00 0x0e [0x?? 0x?? 0x?? = macAdress] 0x00 0x00 0x21 0x43 0x65 0x87
* rsp:  0xfb 0x08 0x00 0x2d 0x00 0xe1 0x1e 0xdf 0xbc 0x9a 0x78
*/
 
 
#include "SMK900.evi"
 
#define SENSORCODE 0x01
     
function exec_aircmd(){
    local rxLen;
    local useParams;
    local r1;
    local i;
    local result;
     
    rxLen=GetAirBuf(0, 0, 20);
     
    if(rxLen>=7){ // 1 byte for paketID + 6 bytes of payload (2 bytes for buffer index and minimum 4 bytes for buffer)
        useParams=true;
        r1=GetBuffer_16(1);
        for(i=3;i<rxLen;i++){
            SetBuffer(i-3,GetBuffer_S8(i),1);
        }
    }else
        useParams=false;
        r1=0;
        SetBuffer_16(0,0x4321);
        SetBuffer_16(2,0x8765);
    }
     
    InvBuffer_S32(r1);
 
    if(useParams){
        SetBuffer_16(0,GetBuffer_16(r1));
        SetBuffer_16(2,GetBuffer_16(r1+2));
        Send(4);   
    }else{
        if(GetBuffer_16(r1+2)==0x789a && GetBuffer_16(r1)==0xbcdf){
            result = 1;
        }else{
            result = 0;
        }
        SetBuffer(4,result,1);
        Send(5);   
    }
}
 
function main()
{
    local execType;
     
    execType = GetExecType();
    if(execType==MESHEXECTYPE_AIRCMD_bm){
        exec_aircmd();
    }
}
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