san m / Mbed 2 deprecated WeightScale

Weight scale using ADS1220

Dependencies:   ADS1220 mbed

Fork of WeightScale by san m

main.cpp@1:933f47cce5bf, 2017-02-15 (annotated)

Committer:
sandeepmalladi
Date:
Wed Feb 15 15:32:38 2017 +0000
Revision:
1:933f47cce5bf
Parent:
0:94208ccccbde
Child:
4:3ca00da0024d
Ads1220 Code to Voltage Conversion Program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sandeepmalladi 0:94208ccccbde 1 #include "mbed.h"
sandeepmalladi 0:94208ccccbde 2 #include "ADS1220.h"
sandeepmalladi 0:94208ccccbde 3 #include "math.h"
sandeepmalladi 0:94208ccccbde 4
sandeepmalladi 0:94208ccccbde 5
sandeepmalladi 1:933f47cce5bf 6 #define NWIDTH 20 /* Size of the data buffer; length of the sequence. */
sandeepmalladi 1:933f47cce5bf 7 #define STOPPER 0 /* Smaller than any datum */
sandeepmalladi 1:933f47cce5bf 8 #define AVERGARE_COUNT 1000 /*Count can be any number from 2,4,8,16 */
sandeepmalladi 0:94208ccccbde 9
sandeepmalladi 1:933f47cce5bf 10 #define PGA 128 // Programmable Gain = 1
sandeepmalladi 1:933f47cce5bf 11 #define VREF 5.0 // Internal reference of 2.048V
sandeepmalladi 0:94208ccccbde 12 #define VFSR VREF/PGA
sandeepmalladi 0:94208ccccbde 13 #define FSR (((long int)1<<23))
sandeepmalladi 0:94208ccccbde 14 #define LSB_Size (VFSR/FSR)
sandeepmalladi 0:94208ccccbde 15
sandeepmalladi 1:933f47cce5bf 16 ADS1220 ads1220_com(SPI_MOSI, SPI_MISO, SPI_SCK,SPI_CS);
sandeepmalladi 0:94208ccccbde 17 Serial data_serial(USBTX, USBRX);
sandeepmalladi 0:94208ccccbde 18 InterruptIn DRDY(PC_5);
sandeepmalladi 0:94208ccccbde 19
sandeepmalladi 0:94208ccccbde 20
sandeepmalladi 0:94208ccccbde 21
sandeepmalladi 0:94208ccccbde 22
sandeepmalladi 0:94208ccccbde 23
sandeepmalladi 1:933f47cce5bf 24 bool New_data_avialable;
sandeepmalladi 0:94208ccccbde 25 void ext_int_DRDY(void);
sandeepmalladi 0:94208ccccbde 26 float code2volt(float c);
sandeepmalladi 0:94208ccccbde 27
sandeepmalladi 1:933f47cce5bf 28 signed long tData;
sandeepmalladi 1:933f47cce5bf 29 float volt;
sandeepmalladi 0:94208ccccbde 30
sandeepmalladi 0:94208ccccbde 31 int main()
sandeepmalladi 0:94208ccccbde 32 {
sandeepmalladi 1:933f47cce5bf 33 data_serial.baud(115200);
sandeepmalladi 0:94208ccccbde 34 wait(0.1);
sandeepmalladi 0:94208ccccbde 35 DRDY.rise(&ext_int_DRDY);
sandeepmalladi 0:94208ccccbde 36 ads1220_com.Config();
sandeepmalladi 0:94208ccccbde 37 ads1220_com.SendStartCommand();
sandeepmalladi 0:94208ccccbde 38 while(1)
sandeepmalladi 0:94208ccccbde 39 {
sandeepmalladi 1:933f47cce5bf 40 if(New_data_avialable)
sandeepmalladi 1:933f47cce5bf 41 {
sandeepmalladi 1:933f47cce5bf 42 New_data_avialable = 0;
sandeepmalladi 1:933f47cce5bf 43 tData = ads1220_com.ReadData();
sandeepmalladi 1:933f47cce5bf 44 volt = code2volt(tData);
sandeepmalladi 1:933f47cce5bf 45 data_serial.printf("\rVoltage : %f\n",volt);
sandeepmalladi 1:933f47cce5bf 46 }
sandeepmalladi 0:94208ccccbde 47 }
sandeepmalladi 0:94208ccccbde 48 }
sandeepmalladi 0:94208ccccbde 49
sandeepmalladi 0:94208ccccbde 50 float code2volt(float c)
sandeepmalladi 0:94208ccccbde 51 {
sandeepmalladi 0:94208ccccbde 52 float Vout = 0;
sandeepmalladi 0:94208ccccbde 53 Vout = (float)(c*LSB_Size*1000); //In mV
sandeepmalladi 0:94208ccccbde 54 return Vout;
sandeepmalladi 0:94208ccccbde 55 }
sandeepmalladi 0:94208ccccbde 56
sandeepmalladi 0:94208ccccbde 57 void ext_int_DRDY(void)
sandeepmalladi 0:94208ccccbde 58 {
sandeepmalladi 0:94208ccccbde 59 New_data_avialable = 1;
sandeepmalladi 0:94208ccccbde 60 }