ShiftLeftBuffer_U32

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ShiftLeftBuffer_U32

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Prototype

ShiftLeftBuffer_U32 (r, shLeft)

Description

Divide the values of two int32 stored in the buffer.

r «= arithShLeft (assumes uint32); note that shLeft CAN be <0 in which case it shifts r right buffer[r] <<= r2;

Return
Nothing

Code Example

The following code example uses the ShiftLeftBuffer_U32 function.

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

/* Example Code
* ShiftLeftBuffer_U32
*
* get buffer index r and shLeft
* set buffer in memory
* shiftLeft buffer[r] by shLeft
* if params used 
*   return result of shiftLeft on 32 bits
* else 
*   return 0x00 (shift not ok) or 0x01 (shift ok) on 8 bits
*
* example VMExecuteCmd:
* cmd:                                                             |r        |shLeft   |buffer
*       0xfb 0x0e 0x00 0x0c 0x00 0x0e [0x?? 0x?? 0x?? = macAdress] 0x00 0x00 0x04 0x00 0x12 0x34 0x56 0x78
* rsp:  0xfb 0x08 0x00 0x2d 0x00 0xe1 0x1e 0x20 0x41 0x63 0x85
* cmd:                                                             |r        |shLeft   |buffer
*       0xfb 0x0e 0x00 0x0c 0x00 0x0e [0x?? 0x?? 0x?? = macAdress] 0x00 0x00 0xfc 0xff 0x21 0x43 0x65 0x87
* rsp:  0xfb 0x08 0x00 0x2d 0x00 0xe1 0x1e 0x32 0x54 0x76 0x08
*/
 
 
#include "SMK900.evi"
 
#define SENSORCODE 0x01
     
function exec_aircmd(){
    local rxLen;
    local useParams;
    local idx,shift;
    local i;
    local result;
 
    rxLen=GetAirBuf(0, 0, 20);
     
    if(rxLen>=9){ // 1 byte for paketID + 8 bytes of payload (4 bytes for buffer indexes and minimum 4 bytes for buffer)
        useParams=true;
        idx=GetBuffer_16(1);
        shift=GetBuffer_16(3);
        for(i=5;i<rxLen;i++){
            SetBuffer(i-5,GetBuffer_S8(i),1);
        }
    }else{
        useParams=false;
        idx=0;
        shift=-4;
        SetBuffer_16(0,0x4321);
        SetBuffer_16(2,0x8765);
    }
     
    ShiftLeftBuffer_U32(idx,shift);
 
    if(useParams){
        SetBuffer_16(0,GetBuffer_16(idx));
        SetBuffer_16(2,GetBuffer_16(idx+2));
        Send(4);    
    }else{
        if(GetBuffer_16(idx+2)==0x0876&&GetBuffer_16(idx)==0x5432){
            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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