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Bittest and bitset in keil mdk5

Dear board
Im writing a driver for HX711 load cell pickup unit.

This has a clock pin which is input to hx711 ic and this clk will be driven by stm32f103
And a Dout pin where for every low to high transition hx711 will out a bit and this goes 24 bit long..

I need to read this serial input and store to a byte which is 24 bit data where i can use array of 3 bytes..

I can easily read input status low or high from input function.

But how can i assign that bit value to a byte at particular position??

Earlier in pic micro.. i have function called bit_set and bit_clear to set or clear particular bit in a byte...

I googled and found there are no code fullfilling my requirements.

Can anyone suggest me please?? I need to read pin and save 24 bit info and convert to
decimal.

Thanks

Parents

0 John Linq over 8 years ago in reply to John Linq

#include <stdio.h>
#include <stdint.h>

uint8_t bit_set( uint8_t data, int position )
{
    data |= (1u<<position);
    return data;
}

uint8_t bit_clear( uint8_t data, int position )
{
    data &= ~(1u<<position);
    return data;
}

void main(void)
{
    uint8_t Target = 0xC9;

    printf( "%X\n", Target );

    Target = bit_set( Target, 1 );
    Target = bit_clear( Target, 3 );

    printf( "%X\n", Target );
}

Reply

0 John Linq over 8 years ago in reply to John Linq

#include <stdio.h>
#include <stdint.h>

uint8_t bit_set( uint8_t data, int position )
{
    data |= (1u<<position);
    return data;
}

uint8_t bit_clear( uint8_t data, int position )
{
    data &= ~(1u<<position);
    return data;
}

void main(void)
{
    uint8_t Target = 0xC9;

    printf( "%X\n", Target );

    Target = bit_set( Target, 1 );
    Target = bit_clear( Target, 3 );

    printf( "%X\n", Target );
}

Children

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