Hi, iam a beguinner on writing program in C# language. I'm having problems when i try to run the program using the softwate Keil. I follow the steps which one of them is to select the device at89s8253 and I put my program and when i run it reports a buch of errors on the output window.
The program starts like this: Thank you very much and sorry for not understanding that well!


#ifndef __AT89S8253_H__
#define __AT89S8253_H__


#define SDA P1_5 // Pino SDA do barramento I2C
#define SCL P1_6 // Pino SCL do barramento I2C
#define pcf_addr 0x94 // Endereco I2C do PCF8591
#define config_DA 0x40 // configuracao para D/A
#define config_AD 0x00 // configuracao para D/A

void timer(char vezes)
{ while(vezes)
{ TMOD=0x01; // TIMER 0 - modo 1 ( 16 bits)
TH0=~(1000/256); // atribui o valor 0x15h, figura 1.12
TL0=-(1000%256); // atribui o valor 0x9Fh, figura 1.12
TR0=1; // seta o flag TR0 dando início à contagem
TF0=0;
while(!TF0); // espera término da contagem
vezes--; // decrementa a variável vezes -
//determina 60ms x 2!
}
}
void start()
{ SDA=SCL=1; // atribui nível lógico 1 aos ports
SDA=0;
_asm
nop // 1 us
nop // 1 us
nop // 1 us
nop // 1 us
nop // 1 us
_endasm;
SCL=0;
}
void stop()
{ SDA=0;
SCL=1;
_asm
nop // 1 us
nop // 1 us
nop // 1 us
nop // 1 us
nop // 1 us
_endasm;
SDA=1;
}
char clock()
{ char level;
SCL=1;
level=SDA;
SCL=0;
return(level);
}
char write(unsigned char byte)
{ unsigned char mask=0x80;
unsigned char controle=0;
while(mask)
{ if(byte & mask)SDA=1;
else SDA=0;
SCL=1;
mask>>=1; //enquanto espera SCL chegar em nível '1', rotaciona mask
SCL=0;
}
SDA=1;
SCL=1;
controle=SDA;
SCL=0;
return(controle); // ack from D/A
}
char read(char ack)
{ unsigned char mask=0x80, byte=0x00;
while(mask)
{ if(clock())
byte|=mask;
mask>>=1;
}
if(ack)
{ SDA=0;
clock();
SDA=1;
}
else
{ SDA=1;
clock();
}
return(byte);
}
char PCF8591(unsigned char addr, unsigned char mod, unsigned char conf) // conf = [1] leitura / [0] escrita
{ char status=0;
unsigned char temp;
temp=(addr+mod);
start();
if(!write(temp))
if(!mod)
{ if(!write(conf))
status=1;
}
else status=1;
return(status); // retorna valor para controle
}
void main()
{ unsigned char value;
unsigned char temp;
unsigned int cont;
value=0x00;
while(1)
{ while(!(PCF8591(pcf_addr,1,0x40)));// configurado para leitura
temp=read(1);
stop();
timer(100);
while(!(PCF8591(pcf_addr,0,config_DA)));// configurado para escrita
write(temp);
stop();
timer(100);
}
}


The error on the output window follows:

Build target 'Target 1'
assembling STARTUP.A51...
compiling programa#1.C...
PROGRAMA#1.C(13): error C202: 'TMOD': undefined identifier
PROGRAMA#1.C(14): error C202: 'TH0': undefined identifier
PROGRAMA#1.C(15): error C202: 'TL0': undefined identifier
PROGRAMA#1.C(16): error C202: 'TR0': undefined identifier
PROGRAMA#1.C(17): error C202: 'TF0': undefined identifier
PROGRAMA#1.C(18): error C202: 'TF0': undefined identifier
PROGRAMA#1.C(24): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(25): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(27): error C202: '_asm': undefined identifier
PROGRAMA#1.C(27): error C141: syntax error near 'nop'
PROGRAMA#1.C(33): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(36): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(37): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(39): error C202: '_asm': undefined identifier
PROGRAMA#1.C(39): error C141: syntax error near 'nop'
PROGRAMA#1.C(45): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(49): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(50): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(51): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(58): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(59): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(60): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(62): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(64): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(65): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(66): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(67): error C202: 'P1_6': undefined identifier
PROGRAMA#1.C(78): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(80): error C202: 'P1_5': undefined identifier
PROGRAMA#1.C(83): error C202: 'P1_5': undefined identifier
Target not created