HX710B .h drive

[huseyin]

Hi HX710B digital pressure sensor .h file
I need it with 16f877a.

[Ttelmah]

Just write it.
It is a very simple serial protocol. Hold the clock low.
You just read the DOUT pin, when it is low a conversion is available.
Send 25, 26 or 27 clocks. 25 clocks reads the differential input. 26
reads temperature (on the A chip), or Dvdd-Avdd
(on B chip). 27 reads the differential input like 25, but at 4* the rate.
Raising the clock and leaving it high, powers down the chip.
The number of clocks configures what the next conversion will do.
Just be aware the result is in 2's complement form. Code on how to
simply handle this has been posted many times in the main forum.
This should be writable in less than 20 minutes by any competent
programmer.

[huseyin]

I cannot measure above 10 kPa



#include <16f877a.h>

#fuses XT,NOWDT,PROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD

#use delay (clock=4000000) // Gecikme fonksiyonu için kullanılacak osilatör frekansı belirtiliyor.
#use spi( SPI1, FORCE_HW, BITS=8, stream=SPI_STREAM)
#include <lcd420.c> // lcd.c dosyası tanıtılıyor
#define HX711_CLK pin_d3
#define HX711_DAT pin_d2
unsigned int32 ADC_DATA=0;
unsigned int32 Get_Load_Cell_Values()
{

unsigned int32 Count;
unsigned char i;
signed int32 Count_C;

Output_low(HX711_CLK);
Count=0;

while(Input(HX711_DAT));
for (i=0;i<24;i++)
{

Output_High(HX711_CLK);

Count=Count<<1;
Output_low(HX711_CLK);

if(Input(HX711_DAT)) Count++;
}
Output_High(HX711_CLK);
Count=Count^0x800000;

Output_Low(HX711_CLK);


return(Count);


}
void main ( )
{
setup_psp(PSP_DISABLED); // PSP birimi devre dışı


setup_timer_1(T1_DISABLED); // T1 zamanlayıcısı devre dışı

setup_adc_ports(NO_ANALOGS); // ANALOG giriş yok
setup_adc(ADC_OFF); // ADC birimi devre dışı
setup_CCP1(CCP_off); // CCP1 birimi devre dışı
setup_ccp2(CCP_off);


lcd_init(); // LCD hazırlanıyor


while(1) // Sonsuz döngü
{

adc_data=Get_Load_Cell_Values();
printf(lcd_putc,"\f %lu ",adc_data);

delay_ms(200);
} }