: crc ( n ch--n)  >< XOR
                  8 0 DO  DUP 8000 AND  
                          IF  2* FFFF AND  crc-polynomial XOR
                        ELSE  2*
                        THEN
                    LOOP;

__z UREG CRC16stage2(UINT8 uchCRCLo, UINT8 uchCRCHi, UREG l, UREG write, UINT8 *puchMsg, UREG i128,UREG i1, UREG i192);

UREG CRC16(UINT8 *puchMsg, UREG usDataLen, UREG write )
{
return CRC16stage2(0xFF,0xFF,usDataLen,write,puchMsg,128,1,192);
}

#pragma optimize=no_inline
__z UREG CRC16stage2(UINT8 uchCRCLo, UINT8 uchCRCHi, UREG l, UREG write, UINT8 *puchMsg, UREG i128, UREG i1, UREG i192)
{
if (l)
do
{
UINT8 parity;
UINT16 tmp16;
parity=*puchMsg++;
parity^=uchCRCLo;
uchCRCLo=uchCRCHi;
tmp16=__multiply_unsigned(parity,i128);
uchCRCHi=tmp16>>8;
uchCRCLo^=tmp16;
//tmp16=__multiply_unsigned(parity,i64);
tmp16>>=1;
uchCRCHi^=tmp16>>8;
uchCRCLo^=tmp16;
parity^=tmp16>>8;
parity^=parity>>1;
parity^=__swap_nibbles(parity);
if (parity&1)
{
uchCRCLo^=i1;
uchCRCHi^=i192;
}
}
while(--l);
if (write)
{
*puchMsg++=uchCRCLo;
*puchMsg++=uchCRCHi;
}
else
{
UREG k;
if ((k=*puchMsg++-uchCRCLo)) return k;
return *puchMsg++-uchCRCHi;
}
return 0;
}

//Полный подсчет за один раз
void PGMCRC(void)
{
unsigned long p;
char h12=0;
char h0=0;
char h1;
char hl5;
char hh5;

p=0;
do
{
h1=h12; //F E D C B A 9 8
h12=__swap_nibbles(h12); //B A 9 8 F E D C
hh5=h12; //B A 9 8 F E D C
h12^=h1; //FB EA D9 C8 BF AE 9D 8C
h12&=0xF0; //FB EA D9 C8 _ _ _ _
hh5&=0x0F; //_ _ _ _ F E D C
h1^=hh5; //F E D C FB EA D9 C8
hl5=h12; //FB EA D9 C8 _ _ _ _
{
unsigned int i=(hh5<<8)|hl5; //_ _ _ _ F E D C FB EA D9 C8 _ _ _ _
i<<=1;
hh5=i>>8; //_ _ _ F E D C FB
hl5=(char)i; // EA D9 C8 _ _ _ _ _
}
h1^=hl5; //crclo // FEA ED9 DC8 C FB EA D9 C8
h12^=hh5; //crchi //FB EA D9 FC8 E D C FB

h12^=h0;
#pragma diag_suppress=Pe1053
h0=h1^(p<0x1FFFE?(*(char __farflash *)p):0);
#pragma diag_default=Pe1053
p++;
#ifdef PUA1
if (!((char)p))
{
if (PORTA&8) PORTA&=~8; else PORTA|=8;
}
#endif
}
while(p<0x20000);
#pragma diag_suppress=Pe1053
if(((h12<<8)|h0)!=*(unsigned int __farflash *)0x1FFFE)
{
//Ошибка контрольной суммы
__disable_interrupt();
__watchdog_reset();
WDTCR=0x08;
WDTCR=0x18;
WDTCR=0x0A; //Разрешаем сторожевой таймер
__watchdog_reset();
for(;;);
}
#pragma diag_default=Pe1053
}

//***************************************************************************
// Расчёт CRC16
//***************************************************************************
static const unsigned int wCRCTable[] = {
0X0000, 0XC0C1, 0XC181, 0X0140, 0XC301, 0X03C0, 0X0280, 0XC241,
0XC601, 0X06C0, 0X0780, 0XC741, 0X0500, 0XC5C1, 0XC481, 0X0440,
0XCC01, 0X0CC0, 0X0D80, 0XCD41, 0X0F00, 0XCFC1, 0XCE81, 0X0E40,
0X0A00, 0XCAC1, 0XCB81, 0X0B40, 0XC901, 0X09C0, 0X0880, 0XC841,
0XD801, 0X18C0, 0X1980, 0XD941, 0X1B00, 0XDBC1, 0XDA81, 0X1A40,
0X1E00, 0XDEC1, 0XDF81, 0X1F40, 0XDD01, 0X1DC0, 0X1C80, 0XDC41,
0X1400, 0XD4C1, 0XD581, 0X1540, 0XD701, 0X17C0, 0X1680, 0XD641,
0XD201, 0X12C0, 0X1380, 0XD341, 0X1100, 0XD1C1, 0XD081, 0X1040,
0XF001, 0X30C0, 0X3180, 0XF141, 0X3300, 0XF3C1, 0XF281, 0X3240,
0X3600, 0XF6C1, 0XF781, 0X3740, 0XF501, 0X35C0, 0X3480, 0XF441,
0X3C00, 0XFCC1, 0XFD81, 0X3D40, 0XFF01, 0X3FC0, 0X3E80, 0XFE41,
0XFA01, 0X3AC0, 0X3B80, 0XFB41, 0X3900, 0XF9C1, 0XF881, 0X3840,
0X2800, 0XE8C1, 0XE981, 0X2940, 0XEB01, 0X2BC0, 0X2A80, 0XEA41,
0XEE01, 0X2EC0, 0X2F80, 0XEF41, 0X2D00, 0XEDC1, 0XEC81, 0X2C40,
0XE401, 0X24C0, 0X2580, 0XE541, 0X2700, 0XE7C1, 0XE681, 0X2640,
0X2200, 0XE2C1, 0XE381, 0X2340, 0XE101, 0X21C0, 0X2080, 0XE041,
0XA001, 0X60C0, 0X6180, 0XA141, 0X6300, 0XA3C1, 0XA281, 0X6240,
0X6600, 0XA6C1, 0XA781, 0X6740, 0XA501, 0X65C0, 0X6480, 0XA441,
0X6C00, 0XACC1, 0XAD81, 0X6D40, 0XAF01, 0X6FC0, 0X6E80, 0XAE41,
0XAA01, 0X6AC0, 0X6B80, 0XAB41, 0X6900, 0XA9C1, 0XA881, 0X6840,
0X7800, 0XB8C1, 0XB981, 0X7940, 0XBB01, 0X7BC0, 0X7A80, 0XBA41,
0XBE01, 0X7EC0, 0X7F80, 0XBF41, 0X7D00, 0XBDC1, 0XBC81, 0X7C40,
0XB401, 0X74C0, 0X7580, 0XB541, 0X7700, 0XB7C1, 0XB681, 0X7640,
0X7200, 0XB2C1, 0XB381, 0X7340, 0XB101, 0X71C0, 0X7080, 0XB041,
0X5000, 0X90C1, 0X9181, 0X5140, 0X9301, 0X53C0, 0X5280, 0X9241,
0X9601, 0X56C0, 0X5780, 0X9741, 0X5500, 0X95C1, 0X9481, 0X5440,
0X9C01, 0X5CC0, 0X5D80, 0X9D41, 0X5F00, 0X9FC1, 0X9E81, 0X5E40,
0X5A00, 0X9AC1, 0X9B81, 0X5B40, 0X9901, 0X59C0, 0X5880, 0X9841,
0X8801, 0X48C0, 0X4980, 0X8941, 0X4B00, 0X8BC1, 0X8A81, 0X4A40,
0X4E00, 0X8EC1, 0X8F81, 0X4F40, 0X8D01, 0X4DC0, 0X4C80, 0X8C41,
0X4400, 0X84C1, 0X8581, 0X4540, 0X8701, 0X47C0, 0X4680, 0X8641,
0X8201, 0X42C0, 0X4380, 0X8341, 0X4100, 0X81C1, 0X8081, 0X4040 };

unsigned int CRC16 ( unsigned char *nData, unsigned int wLength)
{
unsigned char nTemp;
unsigned int wCRCWord = 0xFFFF;

while (wLength--)
{
nTemp = *nData++ ^ wCRCWord;
wCRCWord >>= 8;
wCRCWord ^= wCRCTable[nTemp];
}
return wCRCWord;
}


unsigned int U_CRC16 (unsigned int lngth)
{
unsigned char *item=&UART_RxBuf[0];//Я убрал (было в передаваемых параметрах)
unsigned int CRC = 0xFFFF;
unsigned char i;

while (lngth--)
{
CRC ^= *item++;

for (i=8;i>0;i--)
if (CRC & 1) { CRC >>= 1; CRC ^= 0xA001; }
else { CRC >>= 1; }


}

return (CRC);
}

#define inc_crc16_modbus_upd(data, crc_prev) { \
    U8 cnt_bits, flag_xor; \
    crc_prev ^= data; \
    for (cnt_bits = 8; cnt_bits; cnt_bits--) { \
        flag_xor = crc_prev & 1; \
        crc_prev >>= 1; \
        if (flag_xor) crc_prev ^= CRC16_MODBUS_POLY_VALUE; \
    } \
}

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{-# OPTIONS_GHC -fno-warn-type-defaults #-}
{-# LANGUAGE ExtendedDefaultRules, OverloadedStrings #-}
module Hello where
import Language.BASIC

main :: IO ()
main = runBASIC $ do

    10 PRINT "Hello BASIC World!"