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Hx711.cpp
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Hx711.cpp
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* Hx711.cpp :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: sameye <sameye@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/02/27 18:08:27 by sameye #+# #+# */
/* Updated: 2022/02/27 20:54:57 by sameye ### ########.fr */
/* */
/* ************************************************************************** */
#include "Hx711.hpp"
Hx711::Hx711(void)
{
gpio_init(PD_SCK_GPIO);
gpio_set_dir(PD_SCK_GPIO, GPIO_OUT);
gpio_put(PD_SCK_GPIO, 0);
gpio_init(DOUT_GPIO);
gpio_set_dir(DOUT_GPIO, GPIO_IN);
}
unsigned long Hx711::ReadCound(void)
{
unsigned long Count;
unsigned char i;
//ADD0 = 1;
//ADSK = 0;
Count = 0;
while (gpio_get(DOUT_GPIO)); //DOUT stays high while data is not ready for retrieval
sleep_us(T1); //Here, sleep T1
for (i = 0; i < 24; i++) //data is encoded on 24 bits
{
gpio_put(PD_SCK_GPIO, 1); //ADSK = 1;
sleep_us(T3); //Here, sleep T3
Count = Count << 1;
if (gpio_get(DOUT_GPIO)) //if (ADD0)
Count++;
gpio_put(PD_SCK_GPIO, 0); //ADSK = 0;
sleep_us(T4); //Here, sleep T4
} //25th PD_SDK pulse will pull DOUT back to high
gpio_put(PD_SCK_GPIO, 1); //ADSK = 1;
sleep_us(T3); //Here, sleep T4
Count = Count ^ 0x800000;
gpio_put(PD_SCK_GPIO, 0); //ADSK = 0;
sleep_us(T4); //Here, sleep T4
if (GAIN == 64) //maybe send 0-1-2 more blinks ?
{
gpio_put(PD_SCK_GPIO, 1); //ADSK = 1;
sleep_us(T3);
gpio_put(PD_SCK_GPIO, 0); //ADSK = 1;
sleep_us(T4);
gpio_put(PD_SCK_GPIO, 1); //ADSK = 1;
sleep_us(T3);
gpio_put(PD_SCK_GPIO, 0); //ADSK = 1;
sleep_us(T4);
}
return (Count);
}