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@3:86eef673aec5, 2015-04-07 (annotated)

Committer:
joelbandi
Date:
Tue Apr 07 18:49:23 2015 +0000
Revision:
3:86eef673aec5
Parent:
2:86845af4bcac
Child:
4:dee470044b03
Update

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 3:86eef673aec5 3 #include "SDFileSystem/SDFileSystem.h"
joelbandi 0:194165295aac 4
joelbandi 3:86eef673aec5 5 /***********************PROTOTYPING AND SETTINGS*********************/
joelbandi 2:86845af4bcac 6 DigitalOut CLKSEL(p8);
joelbandi 3:86eef673aec5 7 DigitalOut ADS1CS(p16);
joelbandi 3:86eef673aec5 8 DigitalOut ADS2CS(p17);
joelbandi 3:86eef673aec5 9 DigitalOut MULT_ADS(p18);
joelbandi 2:86845af4bcac 10 DigitalOut PWDN(p10);
joelbandi 2:86845af4bcac 11 DigitalOut RESETpin(p9);
joelbandi 3:86eef673aec5 12 DigitalOut STARTpin(p19);
joelbandi 2:86845af4bcac 13 DigitalIn DRDY(p15);
joelbandi 2:86845af4bcac 14 SPI spi(p5,p6,p7);
joelbandi 3:86eef673aec5 15 SDFileSystem sd(p11,p12,p13,p14,"sd");
joelbandi 2:86845af4bcac 16 signed char Input_Data_Stream[19];
joelbandi 2:86845af4bcac 17 int16_t Input_modified[12];
joelbandi 3:86eef673aec5 18 LocalFileSystem local("local");
joelbandi 3:86eef673aec5 19 /********************************************************************/
joelbandi 2:86845af4bcac 20
joelbandi 2:86845af4bcac 21 int main() // main call
joelbandi 2:86845af4bcac 22 {
joelbandi 2:86845af4bcac 23 /********************POWER ON SEQUENCING *****************************/
joelbandi 2:86845af4bcac 24 wait_ms(500); // boot up time
joelbandi 2:86845af4bcac 25
joelbandi 2:86845af4bcac 26 ADS1CS=1; // deselect ADS1
joelbandi 2:86845af4bcac 27 spi.format(8,3); //spi setttings
joelbandi 2:86845af4bcac 28 spi.frequency(1000000); //spi settings
joelbandi 2:86845af4bcac 29
joelbandi 2:86845af4bcac 30 CLKSEL = 1; //clock signal (internal) setup Frequency = 2.048 MHz
joelbandi 2:86845af4bcac 31 ADS1CS= 0;
joelbandi 2:86845af4bcac 32 spi.write(W_CONFIG1);
joelbandi 2:86845af4bcac 33 spi.write(0x00);
joelbandi 2:86845af4bcac 34 spi.write(0x64);
joelbandi 2:86845af4bcac 35 ADS1CS =1;
joelbandi 2:86845af4bcac 36
joelbandi 2:86845af4bcac 37 PWDN = 1;
joelbandi 2:86845af4bcac 38 RESETpin = 1;
joelbandi 2:86845af4bcac 39 wait(1); //Delay for Power-On Reset and Oscillator Start-Up
joelbandi 2:86845af4bcac 40
joelbandi 2:86845af4bcac 41 ADS1CS= 0; // intial reset command for device reset and register setting clean up
joelbandi 2:86845af4bcac 42 spi.write(RESET);
joelbandi 2:86845af4bcac 43 pause_clk(18);
joelbandi 2:86845af4bcac 44
joelbandi 2:86845af4bcac 45
joelbandi 2:86845af4bcac 46 spi.write(SDATAC); // device boots up in RDATAC mode set it in SDATAC mode
joelbandi 2:86845af4bcac 47 pause_clk(4);
joelbandi 2:86845af4bcac 48
joelbandi 2:86845af4bcac 49
joelbandi 2:86845af4bcac 50 spi.write(W_CONFIG3); // internal reference stup and enable
joelbandi 2:86845af4bcac 51 spi.write(0x00);
joelbandi 2:86845af4bcac 52 spi.write(0xC0);
joelbandi 2:86845af4bcac 53
joelbandi 2:86845af4bcac 54 /***************POWER ON SEQUENCING COMPLETE**************************/
joelbandi 2:86845af4bcac 55
joelbandi 2:86845af4bcac 56
joelbandi 2:86845af4bcac 57 /**************CHANNEL SETTINGS***************************************/
joelbandi 2:86845af4bcac 58 spi.write(W_CHnSET);
joelbandi 2:86845af4bcac 59 spi.write(0x07);
joelbandi 2:86845af4bcac 60 spi.write((int)ADS_Default_Channel_Settings);
joelbandi 2:86845af4bcac 61 ADS1CS = 1;
joelbandi 2:86845af4bcac 62 /*********************************************************************/
joelbandi 2:86845af4bcac 63
joelbandi 2:86845af4bcac 64 /*****************************CONVERSION BEGINS**********************/
joelbandi 2:86845af4bcac 65 STARTpin= 1;
joelbandi 2:86845af4bcac 66
joelbandi 2:86845af4bcac 67 //write main superloop and rdatac mode and enable dout conversion AND SETUP FILESTORAFGE
joelbandi 2:86845af4bcac 68
joelbandi 2:86845af4bcac 69 spi.write(RDATAC);
joelbandi 2:86845af4bcac 70 wait_ms(10);
joelbandi 2:86845af4bcac 71 while(DRDY) {}
joelbandi 2:86845af4bcac 72 ADS1CS= 0;
joelbandi 2:86845af4bcac 73 for (int i=0; i<=18; i++) {
joelbandi 2:86845af4bcac 74 Input_Data_Stream[i] = spi.write(0x00);
joelbandi 2:86845af4bcac 75 }
joelbandi 2:86845af4bcac 76 for(int i=3; i<=17; i++) {
joelbandi 2:86845af4bcac 77 int k= 0;
joelbandi 2:86845af4bcac 78 int j= 4;
joelbandi 2:86845af4bcac 79 Input_modified[k]=Input_Data_Stream[i]<<8 + Input_Data_Stream[j];
joelbandi 2:86845af4bcac 80 j++;
joelbandi 2:86845af4bcac 81 k++;
joelbandi 2:86845af4bcac 82 }
joelbandi 2:86845af4bcac 83 Input_modified[8]=Input_modified[7]-Input_modified[6];
joelbandi 2:86845af4bcac 84 Input_modified[9]=-(Input_modified[7]+Input_modified[6]/2);
joelbandi 2:86845af4bcac 85 Input_modified[10]=((2*Input_modified[6])-Input_modified[7])/2;
joelbandi 2:86845af4bcac 86 Input_modified[11]=((2*Input_modified[7])-Input_modified[6])/2;
joelbandi 2:86845af4bcac 87 spi.write(SDATAC);
joelbandi 2:86845af4bcac 88
joelbandi 3:86eef673aec5 89 /***********************FILE IO PROCEDURE ON LOCAL STORAGE******************/
joelbandi 3:86eef673aec5 90 FILE* file = fopen("local/logfile.txt","w");
joelbandi 3:86eef673aec5 91 for (int k =0; k<12; k++) {
joelbandi 3:86eef673aec5 92 fputc(Input_modified[k],file);
joelbandi 3:86eef673aec5 93 }
joelbandi 3:86eef673aec5 94 //dont forget to fclose(file);
joelbandi 3:86eef673aec5 95 /***************************************************************************/
joelbandi 3:86eef673aec5 96
joelbandi 3:86eef673aec5 97
joelbandi 3:86eef673aec5 98 ///////////////////////////OR///////////////////////////////////////////////////////////////////////
joelbandi 3:86eef673aec5 99
joelbandi 3:86eef673aec5 100
joelbandi 3:86eef673aec5 101 /****************************SD I/O OPERATIONS *****************************/
joelbandi 3:86eef673aec5 102 mkdir("sd/logfiledir",0777);
joelbandi 3:86eef673aec5 103 FILE* file1 = fopen("sd/logfiledir/logfile.txt","w");
joelbandi 3:86eef673aec5 104 for (int k =0; k<12; k++) {
joelbandi 3:86eef673aec5 105 fputc(Input_modified[k],file1);
joelbandi 3:86eef673aec5 106 }
joelbandi 3:86eef673aec5 107 //dont forget to fclose(file1);
joelbandi 3:86eef673aec5 108 /***************************************************************************/
joelbandi 3:86eef673aec5 109
joelbandi 3:86eef673aec5 110
joelbandi 3:86eef673aec5 111
joelbandi 3:86eef673aec5 112
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joelbandi 3:86eef673aec5 114
joelbandi 0:194165295aac 115
joelbandi 0:194165295aac 116
joelbandi 2:86845af4bcac 117
joelbandi 2:86845af4bcac 118
joelbandi 2:86845af4bcac 119
joelbandi 2:86845af4bcac 120
joelbandi 0:194165295aac 121
joelbandi 2:86845af4bcac 122
joelbandi 2:86845af4bcac 123 }
joelbandi 2:86845af4bcac 124
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