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@4:dee470044b03, 2015-04-09 (annotated)

Committer:
joelbandi
Date:
Thu Apr 09 21:07:59 2015 +0000
Revision:
4:dee470044b03
Parent:
3:86eef673aec5
Child:
5:4bcb26d018f8
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
joelbandi 0:194165295aac 1 #include "mbed.h"
joelbandi 4:dee470044b03 2 #include "ADSlib/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 4:dee470044b03 13 DigitalOut waitled(LED1);
joelbandi 2:86845af4bcac 14 DigitalIn DRDY(p15);
joelbandi 2:86845af4bcac 15 SPI spi(p5,p6,p7);
joelbandi 3:86eef673aec5 16 SDFileSystem sd(p11,p12,p13,p14,"sd");
joelbandi 2:86845af4bcac 17 signed char Input_Data_Stream[19];
joelbandi 2:86845af4bcac 18 int16_t Input_modified[12];
joelbandi 3:86eef673aec5 19 LocalFileSystem local("local");
joelbandi 3:86eef673aec5 20 /********************************************************************/
joelbandi 2:86845af4bcac 21
joelbandi 4:dee470044b03 22 int main() // main call
joelbandi 2:86845af4bcac 23 {
joelbandi 2:86845af4bcac 24 /********************POWER ON SEQUENCING *****************************/
joelbandi 4:dee470044b03 25 waitled =1;
joelbandi 4:dee470044b03 26 wait_ms(500); //boot up time
joelbandi 2:86845af4bcac 27
joelbandi 4:dee470044b03 28 ADS1CS=1; //deselect ADS1
joelbandi 2:86845af4bcac 29 spi.format(8,3); //spi setttings
joelbandi 2:86845af4bcac 30 spi.frequency(1000000); //spi settings
joelbandi 2:86845af4bcac 31
joelbandi 2:86845af4bcac 32 CLKSEL = 1; //clock signal (internal) setup Frequency = 2.048 MHz
joelbandi 2:86845af4bcac 33 ADS1CS= 0;
joelbandi 2:86845af4bcac 34 spi.write(W_CONFIG1);
joelbandi 2:86845af4bcac 35 spi.write(0x00);
joelbandi 2:86845af4bcac 36 spi.write(0x64);
joelbandi 2:86845af4bcac 37 ADS1CS =1;
joelbandi 2:86845af4bcac 38
joelbandi 2:86845af4bcac 39 PWDN = 1;
joelbandi 2:86845af4bcac 40 RESETpin = 1;
joelbandi 2:86845af4bcac 41 wait(1); //Delay for Power-On Reset and Oscillator Start-Up
joelbandi 2:86845af4bcac 42
joelbandi 2:86845af4bcac 43 ADS1CS= 0; // intial reset command for device reset and register setting clean up
joelbandi 2:86845af4bcac 44 spi.write(RESET);
joelbandi 2:86845af4bcac 45 pause_clk(18);
joelbandi 2:86845af4bcac 46
joelbandi 2:86845af4bcac 47
joelbandi 2:86845af4bcac 48 spi.write(SDATAC); // device boots up in RDATAC mode set it in SDATAC mode
joelbandi 2:86845af4bcac 49 pause_clk(4);
joelbandi 2:86845af4bcac 50
joelbandi 2:86845af4bcac 51
joelbandi 2:86845af4bcac 52 spi.write(W_CONFIG3); // internal reference stup and enable
joelbandi 2:86845af4bcac 53 spi.write(0x00);
joelbandi 2:86845af4bcac 54 spi.write(0xC0);
joelbandi 2:86845af4bcac 55
joelbandi 2:86845af4bcac 56 /***************POWER ON SEQUENCING COMPLETE**************************/
joelbandi 2:86845af4bcac 57
joelbandi 2:86845af4bcac 58
joelbandi 2:86845af4bcac 59 /**************CHANNEL SETTINGS***************************************/
joelbandi 2:86845af4bcac 60 spi.write(W_CHnSET);
joelbandi 2:86845af4bcac 61 spi.write(0x07);
joelbandi 2:86845af4bcac 62 spi.write((int)ADS_Default_Channel_Settings);
joelbandi 2:86845af4bcac 63 ADS1CS = 1;
joelbandi 2:86845af4bcac 64 /*********************************************************************/
joelbandi 2:86845af4bcac 65
joelbandi 2:86845af4bcac 66 /*****************************CONVERSION BEGINS**********************/
joelbandi 2:86845af4bcac 67 STARTpin= 1;
joelbandi 2:86845af4bcac 68
joelbandi 2:86845af4bcac 69 //write main superloop and rdatac mode and enable dout conversion AND SETUP FILESTORAFGE
joelbandi 4:dee470044b03 70 Timer tensec;
joelbandi 4:dee470044b03 71 tensec.start();
joelbandi 4:dee470044b03 72 while(tensec.read()<=10) {
joelbandi 4:dee470044b03 73 spi.write(RDATAC);
joelbandi 4:dee470044b03 74 wait_ms(10);
joelbandi 4:dee470044b03 75 while(DRDY) {}
joelbandi 4:dee470044b03 76 ADS1CS= 0;
joelbandi 4:dee470044b03 77 for (int i=0; i<=18; i++) {
joelbandi 4:dee470044b03 78 Input_Data_Stream[i] = spi.write(0x00);
joelbandi 4:dee470044b03 79 }
joelbandi 4:dee470044b03 80 for(int i=3; i<=17; i++) {
joelbandi 4:dee470044b03 81 int k= 0;
joelbandi 4:dee470044b03 82 int j= 4;
joelbandi 4:dee470044b03 83 Input_modified[k]=Input_Data_Stream[i]<<8 + Input_Data_Stream[j];
joelbandi 4:dee470044b03 84 j++;
joelbandi 4:dee470044b03 85 k++;
joelbandi 4:dee470044b03 86 }
joelbandi 4:dee470044b03 87 Input_modified[8]=Input_modified[7]-Input_modified[6];
joelbandi 4:dee470044b03 88 Input_modified[9]=-(Input_modified[7]+Input_modified[6]/2);
joelbandi 4:dee470044b03 89 Input_modified[10]=((2*Input_modified[6])-Input_modified[7])/2;
joelbandi 4:dee470044b03 90 Input_modified[11]=((2*Input_modified[7])-Input_modified[6])/2;
joelbandi 4:dee470044b03 91 spi.write(SDATAC);
joelbandi 2:86845af4bcac 92
joelbandi 4:dee470044b03 93 /***********************FILE IO PROCEDURE ON LOCAL STORAGE******************/
joelbandi 4:dee470044b03 94 FILE* file = fopen("local/logfile.txt","w");
joelbandi 4:dee470044b03 95 for (int k =0; k<12; k++) {
joelbandi 4:dee470044b03 96 fputc(Input_modified[k],file);
joelbandi 4:dee470044b03 97 }
joelbandi 4:dee470044b03 98 //dont forget to
joelbandi 4:dee470044b03 99 //fclose(file);
joelbandi 4:dee470044b03 100 /***************************************************************************/
joelbandi 3:86eef673aec5 101
joelbandi 3:86eef673aec5 102
joelbandi 3:86eef673aec5 103 ///////////////////////////OR///////////////////////////////////////////////////////////////////////
joelbandi 3:86eef673aec5 104
joelbandi 3:86eef673aec5 105
joelbandi 4:dee470044b03 106 /****************************SD I/O OPERATIONS *****************************/
joelbandi 4:dee470044b03 107 mkdir("sd/logfiledir",0777);
joelbandi 4:dee470044b03 108 FILE* file1 = fopen("sd/logfiledir/logfile.txt","w");
joelbandi 4:dee470044b03 109 for (int k =0; k<12; k++) {
joelbandi 4:dee470044b03 110 fputc(Input_modified[k],file1);
joelbandi 4:dee470044b03 111 }
joelbandi 4:dee470044b03 112 //dont forget to
joelbandi 4:dee470044b03 113 //fclose(file1);
joelbandi 4:dee470044b03 114 /***************************************************************************/
joelbandi 3:86eef673aec5 115 }
joelbandi 4:dee470044b03 116 tensec.stop();
joelbandi 4:dee470044b03 117 waitled =0;
joelbandi 2:86845af4bcac 118 }
joelbandi 2:86845af4bcac 119
joelbandi 2:86845af4bcac 120
joelbandi 2:86845af4bcac 121