tp28xx serial keil code demo code for ram test and checksum

byte   bval;
word   wval,wj;
word code  *sumvalue;// define the ROM checksum value
byte        *bbpt;

word str2whex(byte *pt)
{ 
 byte i;

 for(i=0;i<=3;i++)
 {
  wj=0x0000;
  if((pt[i]>='0')&&(pt[i]<='9'))wj=pt[i]-'0';
  if((pt[i]>='A')&&(pt[i]<='F'))wj=0x0a+(pt[i]-'A');
  if((pt[i]>='a')&&(pt[i]<='f'))wj=0x0a+(pt[i]-'a');
  if(i==0)wval=wj;
  if(i==1)wval=wval+(wj<<4 nbsp="" span="">
  if(i==2)wval=wval+(wj<<8 nbsp="" span="">
  if(i==3)wval=wval+(wj<<12 nbsp="" span="">
 }
 return wval;
}

byte str2bhex(byte *pt)
{
 byte i,j;

 for(i=0;i<=1;i++)
 {
  j=0x00;
  if((pt[i]>='0')&&(pt[i]<='9'))j=pt[i]-'0';
  if((pt[i]>='A')&&(pt[i]<='F'))j=0x0a+(pt[i]-'A');
  if((pt[i]>='a')&&(pt[i]<='f'))j=0x0a+(pt[i]-'a');
  if(i==0)bval=j;
  if(i==1)bval=bval+(j<<4 nbsp="" span="">
 }
 return bval;
}

void fillauxram()
{
//byte xdata  ss;

 CHPCON = 0x10;
 xdatapt = 0x0000;
  
 for(mi=0;mi<0xfe mi="" span="">
  *xdatapt=0x55;
  xdatapt++;
 }

 xdatapt = 0x0100;  
 for(mi=0;mi<0xfe mi="" span="">
  *xdatapt=0xa5;
  xdatapt++;
 }

 //CHPCON = 0x00;
}

byte w2byte(word xx,byte yy){
 if(yy==0){
  return (byte )xx&0x00ff;
 }
 if(yy==1){
  return (byte )xx>>8;
 }
}


word  setchecksum(word spt1,word spt2){

word idata  chkvalue; 
byte code  *ipt;

 chkvalue = 0x0000;
 for(ipt = spt1 ; ipt <= spt2 ; ipt++ )chkvalue += *ipt;
  
 return chkvalue;
}

byte iramcheck(){//check 0x40..0xfe idata  ram

byte IDATA *ipt;
byte i,tmp;

EA=0;
ipt = 0x40;
 for(i=0x40;i<0xfe i="" span="">
  tmp =*ipt;  
  *ipt=0x55;
  if(*ipt != 0x55)break;
  *ipt=0xaa;
  if(*ipt != 0xaa)break;    
  *ipt=tmp;
  ipt++;
 }
  
EA=1;

if( i != 0xfe) 
 return 0x55; //err ram
else 
 return 0x00;//ok !


}

byte xramcheck(){ // chcek 0x00.. 0xfe aux xdata ram

byte IDATA *xpt;
byte i,tmp;

CHPCON = 0x10;
EA=0;
xpt = 0x0000;
for(i=0x00;i<0xfe i="" span="">
 tmp =*xpt;  
 *xpt=0x55;
 if(*xpt != 0x55)break;
 *xpt=0xaa;
 if(*xpt != 0xaa)break;    
 *xpt=tmp;
 xpt++;
}
  
EA=1;
if(i != 0xfe)
 return 0x55; //err ram
else 
 return 0x00;//ok !

}