Joel Bandi / Mbed 2 deprecated ECG_ADS1198_IITH

ECG_ADS1198

Dependencies:   ADSlib mbed SDFileSystem

This was created for an internship project at IIT hyderabad.

main.cpp@2:86845af4bcac, 2015-04-05 (annotated)

Committer:
joelbandi
Date:
Sun Apr 05 20:34:03 2015 +0000
Revision:
2:86845af4bcac
Parent:
1:65a219536d66
Child:
3:86eef673aec5
SUPERFIX;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
joelbandi 0:194165295aac 1 #include "mbed.h"
joelbandi 0:194165295aac 2 #include "ADSlib.h"
joelbandi 0:194165295aac 3
joelbandi 2:86845af4bcac 4 /***********************PROTOTYPING**********************************/
joelbandi 2:86845af4bcac 5 DigitalOut CLKSEL(p8);
joelbandi 2:86845af4bcac 6 DigitalOut ADS1CS(p11);
joelbandi 2:86845af4bcac 7 DigitalOut ADS2CS(p12);
joelbandi 2:86845af4bcac 8 DigitalOut MULT_ADS(p13);
joelbandi 2:86845af4bcac 9 DigitalOut PWDN(p10);
joelbandi 2:86845af4bcac 10 DigitalOut RESETpin(p9);
joelbandi 2:86845af4bcac 11 DigitalOut STARTpin(p14);
joelbandi 2:86845af4bcac 12 DigitalIn DRDY(p15);
joelbandi 2:86845af4bcac 13 SPI spi(p5,p6,p7);
joelbandi 2:86845af4bcac 14 /********************************************************************/
joelbandi 2:86845af4bcac 15 signed char Input_Data_Stream[19];
joelbandi 2:86845af4bcac 16 int16_t Input_modified[12];
joelbandi 2:86845af4bcac 17
joelbandi 2:86845af4bcac 18 int main() // main call
joelbandi 2:86845af4bcac 19 {
joelbandi 2:86845af4bcac 20 /********************POWER ON SEQUENCING *****************************/
joelbandi 2:86845af4bcac 21 wait_ms(500); // boot up time
joelbandi 2:86845af4bcac 22
joelbandi 2:86845af4bcac 23 ADS1CS=1; // deselect ADS1
joelbandi 2:86845af4bcac 24 spi.format(8,3); //spi setttings
joelbandi 2:86845af4bcac 25 spi.frequency(1000000); //spi settings
joelbandi 2:86845af4bcac 26
joelbandi 2:86845af4bcac 27 CLKSEL = 1; //clock signal (internal) setup Frequency = 2.048 MHz
joelbandi 2:86845af4bcac 28 ADS1CS= 0;
joelbandi 2:86845af4bcac 29 spi.write(W_CONFIG1);
joelbandi 2:86845af4bcac 30 spi.write(0x00);
joelbandi 2:86845af4bcac 31 spi.write(0x64);
joelbandi 2:86845af4bcac 32 ADS1CS =1;
joelbandi 2:86845af4bcac 33
joelbandi 2:86845af4bcac 34 PWDN = 1;
joelbandi 2:86845af4bcac 35 RESETpin = 1;
joelbandi 2:86845af4bcac 36 wait(1); //Delay for Power-On Reset and Oscillator Start-Up
joelbandi 2:86845af4bcac 37
joelbandi 2:86845af4bcac 38 ADS1CS= 0; // intial reset command for device reset and register setting clean up
joelbandi 2:86845af4bcac 39 spi.write(RESET);
joelbandi 2:86845af4bcac 40 pause_clk(18);
joelbandi 2:86845af4bcac 41
joelbandi 2:86845af4bcac 42
joelbandi 2:86845af4bcac 43 spi.write(SDATAC); // device boots up in RDATAC mode set it in SDATAC mode
joelbandi 2:86845af4bcac 44 pause_clk(4);
joelbandi 2:86845af4bcac 45
joelbandi 2:86845af4bcac 46
joelbandi 2:86845af4bcac 47 spi.write(W_CONFIG3); // internal reference stup and enable
joelbandi 2:86845af4bcac 48 spi.write(0x00);
joelbandi 2:86845af4bcac 49 spi.write(0xC0);
joelbandi 2:86845af4bcac 50
joelbandi 2:86845af4bcac 51 /***************POWER ON SEQUENCING COMPLETE**************************/
joelbandi 2:86845af4bcac 52
joelbandi 2:86845af4bcac 53
joelbandi 2:86845af4bcac 54 /**************CHANNEL SETTINGS***************************************/
joelbandi 2:86845af4bcac 55 spi.write(W_CHnSET);
joelbandi 2:86845af4bcac 56 spi.write(0x07);
joelbandi 2:86845af4bcac 57 spi.write((int)ADS_Default_Channel_Settings);
joelbandi 2:86845af4bcac 58 ADS1CS = 1;
joelbandi 2:86845af4bcac 59 /*********************************************************************/
joelbandi 2:86845af4bcac 60
joelbandi 2:86845af4bcac 61 /*****************************CONVERSION BEGINS**********************/
joelbandi 2:86845af4bcac 62 STARTpin= 1;
joelbandi 2:86845af4bcac 63
joelbandi 2:86845af4bcac 64 //write main superloop and rdatac mode and enable dout conversion AND SETUP FILESTORAFGE
joelbandi 2:86845af4bcac 65
joelbandi 2:86845af4bcac 66 spi.write(RDATAC);
joelbandi 2:86845af4bcac 67 wait_ms(10);
joelbandi 2:86845af4bcac 68 while(DRDY) {}
joelbandi 2:86845af4bcac 69 ADS1CS= 0;
joelbandi 2:86845af4bcac 70 for (int i=0; i<=18; i++) {
joelbandi 2:86845af4bcac 71 Input_Data_Stream[i] = spi.write(0x00);
joelbandi 2:86845af4bcac 72 }
joelbandi 2:86845af4bcac 73 for(int i=3; i<=17; i++) {
joelbandi 2:86845af4bcac 74 int k= 0;
joelbandi 2:86845af4bcac 75 int j= 4;
joelbandi 2:86845af4bcac 76 Input_modified[k]=Input_Data_Stream[i]<<8 + Input_Data_Stream[j];
joelbandi 2:86845af4bcac 77 j++;
joelbandi 2:86845af4bcac 78 k++;
joelbandi 2:86845af4bcac 79 }
joelbandi 2:86845af4bcac 80 Input_modified[8]=Input_modified[7]-Input_modified[6];
joelbandi 2:86845af4bcac 81 Input_modified[9]=-(Input_modified[7]+Input_modified[6]/2);
joelbandi 2:86845af4bcac 82 Input_modified[10]=((2*Input_modified[6])-Input_modified[7])/2;
joelbandi 2:86845af4bcac 83 Input_modified[11]=((2*Input_modified[7])-Input_modified[6])/2;
joelbandi 2:86845af4bcac 84 spi.write(SDATAC);
joelbandi 2:86845af4bcac 85
joelbandi 0:194165295aac 86
joelbandi 0:194165295aac 87
joelbandi 2:86845af4bcac 88
joelbandi 2:86845af4bcac 89
joelbandi 2:86845af4bcac 90
joelbandi 2:86845af4bcac 91
joelbandi 0:194165295aac 92
joelbandi 2:86845af4bcac 93
joelbandi 2:86845af4bcac 94 }
joelbandi 2:86845af4bcac 95
joelbandi 2:86845af4bcac 96
joelbandi 2:86845af4bcac 97