[51] Software UART on AT89C51 Using Embedded C

paulfjujo said:

hello,

you can test with MikroC for 8051 ... available if code size <=2Kb

Code:

#define Version "180702"
#define Directory  " "
#define Project   " "
#define Source     " "
#define MCU  "AT89C2051"
#define FOSC  "18.432MHz"
#define POWER_Supply "5V"
#define XTAL 18432000
#define BAUDRATE
#define BitTimer (((XTAL/BAUDRATE)/12) - 5) / 2

#define Byte unsigned char
#define Word unsigned int

#define TRUE 1
#define FALSE 0
#define CR 13
#define LF 10

#define LED_Error P1.B4


#define ON 0
#define OFF 1

const char TH1_INIT = 0xB1; // Initial 20mS   at 12MHZ
const char TL1_INIT = 0xE0;

sbit Soft_Uart_RX at P3_0_bit;
sbit Soft_Uart_TX at P3_1_bit;

char TEXTE[64];
Word i,j,k;
volatile unsigned char Count1;
Byte char c1;
Byte Erreur=0;
Byte Dummy;




void main( void)
{
  j=0;
  P3=0xFF;
  P1=0xFF;
  Delay_ms(2000);

  Erreur= Soft_UART_Init(2400,1);
  while (Erreur>0)
  {
   LED_Error=!LED_Error;
   Delay_ms(1000);
  }

   Soft_UART_Write('A');
   Soft_UART_Write('B');
   Soft_UART_Write('C');
   Soft_UART_Write('D');
   Soft_UART_Write(CR);
   Soft_UART_Write(LF);
  
  Delay_ms(1000);
  
  while(1) 
  {
    c1 = Soft_UART_Read(&Erreur);
    if (Erreur)
      LED_Error=1;
    else
      Soft_UART_Write(c1);
    }
  }

compile OK for AT89C2051 18.432 MHz
use Software UART MikroC lib
but not tested in real world...

Click to expand...

adyrn001 said:

Please suggest something good or provide code... any library i can explore...

Click to expand...