ConvertI32ToFloat

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ConvertI32ToFloat

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Prototype

ConvertI32ToFloat (r, exp10)

Description

Inplace cast of int32 to a float. A scaling of 10^exp10 is applued to the produced value

Return
Nothing

Code Example

The following code example uses the ConvertI32ToFloat function.

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

/* Example Code
* ConvertI32ToFloat
* tools Converter: https://www.h-schmidt.net/FloatConverter/IEEE754.html
*
* get buffer index r and exp10
* set buffer in memory
* convert buffer[r] from I32 to Float
* if params used 
*   return result of convert on 32 bits
* else
*   return 0x00 (conv pas ok) or 0x01 (conv ok)
*
* example VMExecuteCmd:
* cmd:                                                             |r        |exp10    |buffer
*       0xfb 0x0e 0x00 0x0c 0x00 0x0e [0x?? 0x?? 0x?? = macAdress] 0x00 0x00 0xff 0xff 0xf6 0xff 0xff 0xff
* rsp:  0xfb 0x08 0x00 0x2d 0x00 0xe1 0x1e 0x00 0x00 0x80 0xbf
*/
 
#include "SMK900.evi"
 
#define SENSORCODE 0x01
 
function exec_aircmd(){
    local rxLen;
    local useParams;
    local idx,exp;
    local i;
    local result;
 
    rxLen=GetAirBuf(0, 0, 20);
     
    if(rxLen>=9){ // 1 byte for paketID + 8 bytes of payload (4 bytes for index + exp10 and minimum 4 bytes for buffer)
        useParams=true;
        idx=GetBuffer_16(1);
        exp=GetBuffer_16(3);
        for(i=5;i<rxLen;i++){
            SetBuffer(i-5,GetBuffer_S8(i),1);
        }
    }else{
        useParams=false;
        idx=0;
        exp=-1;
         
        SetBuffer_16(0,0xfff6);
        SetBuffer_16(2,0xffff);
     
    }
     
    ConvertI32ToFloat(idx,exp);
 
    if(useParams){
        SetBuffer_16(0,GetBuffer_16(idx));
        SetBuffer_16(2,GetBuffer_16(idx+2));
        Send(4);
    }else{
        if(GetBuffer_16(idx+2)==0xbf80&&GetBuffer_16(idx)==0x0000){
            result = 1;
        }else{
            result = 0;
        }
        SetBuffer(0,result,1);
        Send(1);
    }   
}
 
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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