Eugene Mwangi / Mbed 2 deprecated mbed_blinky

A test program for hx711 built for mbed Os framework.

Dependencies:   mbed HX711

main.cpp@25:611277904537, 2019-06-25 (annotated)

Committer:
Eugene0469
Date:
Tue Jun 25 15:16:15 2019 +0000
Revision:
25:611277904537
Parent:
24:7f14b70fc9ef 
Create a hx711 test program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dan 0:7dec7e9ac085 1 #include "mbed.h"
Eugene0469 25:611277904537 2 #include "Hx711.h"
Eugene0469 25:611277904537 3
Eugene0469 25:611277904537 4
dan 0:7dec7e9ac085 5
Eugene0469 25:611277904537 6 float calibration_factor = -1.0f; // this calibration factor is adjusted according to my load cell
Eugene0469 25:611277904537 7 int32_t units_raw;
Eugene0469 25:611277904537 8 float units;
Eugene0469 25:611277904537 9 float ounces;
Eugene0469 25:611277904537 10 int offset = 0;
Eugene0469 25:611277904537 11
Eugene0469 25:611277904537 12 Hx711 scale(D4, D5);
Eugene0469 25:611277904537 13
Eugene0469 25:611277904537 14 //void delay(int delay){
Eugene0469 25:611277904537 15 // for(int i=0; i<delay;i++)
Eugene0469 25:611277904537 16 //}
dan 0:7dec7e9ac085 17
dan 0:7dec7e9ac085 18 int main() {
Eugene0469 25:611277904537 19 printf("HX711 calibration sketch\n");
Eugene0469 25:611277904537 20 printf("Remove all weight from scale\n");
Eugene0469 25:611277904537 21 printf("After readings begin, place known weight on scale\n");
Eugene0469 25:611277904537 22 printf("Press + or a to increase calibration factor\n");
Eugene0469 25:611277904537 23 printf("Press - or z to decrease calibration factor\n");
Eugene0469 25:611277904537 24
Eugene0469 25:611277904537 25 offset = (int)scale.read();
Eugene0469 25:611277904537 26 scale.set_offset(offset);
Eugene0469 25:611277904537 27 printf("Reading: %d \n",offset);
Eugene0469 25:611277904537 28 scale.set_scale(calibration_factor);
dan 0:7dec7e9ac085 29 while(1) {
Eugene0469 25:611277904537 30 wait_ms(1000);
Eugene0469 25:611277904537 31
Eugene0469 25:611277904537 32 units_raw = scale.readRaw();
Eugene0469 25:611277904537 33 units = scale.read();
Eugene0469 25:611277904537 34 if (units < 0)
Eugene0469 25:611277904537 35 {
Eugene0469 25:611277904537 36 units = 0.00;
Eugene0469 25:611277904537 37 }
Eugene0469 25:611277904537 38 // ounces = units * 0.035274f;
Eugene0469 25:611277904537 39 printf("Raw reading: %d grams. \n",units_raw);
Eugene0469 25:611277904537 40 printf("Actual reading: %f grams. \n",units);
Eugene0469 25:611277904537 41 // printf("Calibration_factor: %f\n",calibration_factor);
Eugene0469 25:611277904537 42 wait_ms(10000);
stevep 4:81cea7a352b0 43 }
dan 0:7dec7e9ac085 44 }
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