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How to read P2 and convert the value to a float number? (AT89c51RC2)

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fatihbasaris

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I am using AT89c51RC2. I want to read P2 and convert to a float number and
write this number to the LCD...
 

Re: float????

If you are using a C compiler, the function sprinf can convert a float to ASCII.
 

Re: float????

thanks for reply. ı am using keil. ı wrote this codes.:(
For example received=174

.
.
.
.
void DATAdatawrite(char data[])
{
int i=0;
while(data!=0)
{
RS=1;lcddelay(1);
RW=0;lcddelay(1);
EN=1;lcddelay(1);
DATA=data;
EN=0;lcddelay(1);
i++;

}
}
.
.
.
.
void main()

unsigned int received,lasttwo,number1,number2,number3;


while(1)
{
received=P1;

lasttwo=received%100;
number1=lasttwo%10;
number2=(lasttwo-number1)/10;
number3=(received-lasttwo)/100;

LCDinit();

LCDdatawrite(????)

For example received=174

I want to write to lcd 174 but ı did not do this.
 

Re: float????

float? I don't see any floats in your code. Only unsigned int.

When I run your statements in the following program, it prints 1 7 4
Code: 
#include <stdio.h>

int main(void)
{
  unsigned int received,lasttwo,number1,number2,number3;

  received = 174;
  lasttwo = received % 100;
  number1 = lasttwo % 10;
  number2 = (lasttwo - number1) / 10;
  number3 = (received - lasttwo) / 100;

  printf("%u %u %u\n", number3, number2, number1);
  return 0;
}

Maybe you forgot to convert your three numbers to ASCII characters before sending them to your LCD?

You could convert the unsigned int to a string, and then use that:
Code: 
#include <stdio.h>

int main(void)
{
  unsigned int received = 174;
  char buf[100];

  sprintf(buf, "%u", received);
  puts(buf);
  return 0;
}
 

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