Diff: ecgg.cpp

Revision:

1:8316c23ec6b9

Child:

3:9a06c2bed650

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ecgg.cpp	Mon Jan 30 07:45:41 2017 +0000
@@ -0,0 +1,445 @@
+/** ECG ADS1291 Test program.
+ADS1291 is a single channel ECG chip
+with a 24 bit Sigma-Delta ADC
+ */
+ 
+#include "mbed.h"
+//#include "timer.h"
+#include <string.h>
+#include <stdio.h>
+#include "ds3231.h"
+#include "SDFileSystem.h"
+#include "ecg_dec.h"
+#include "rtc.h"
+#include "sdcard.h"
+//#include "rtos.h"
+
+//SPI SETTINGS
+#define baud_rate 115200
+#define freq 1000000
+#define bits 8 
+#define mode 1 
+#define loop 1000000 
+
+//PIN DECLARATIONS
+Serial pc(USBTX,USBRX);
+DigitalIn DRDY_BAR(PTC8);
+DigitalOut CHIPSEL_BAR(PTD0);
+DigitalOut ADS_START(PTC16);
+DigitalOut RESET_BAR(PTC17);
+
+//FILE *fp = NULL;
+
+
+//unsigned char chk2= 0;
+float value = 0;
+unsigned int value1 = 0;
+unsigned int value2 = 0;
+unsigned int value3 = 0;
+unsigned int value4 = 0;
+unsigned int value5 = 0;
+unsigned int value6 = 0;
+unsigned int data1 = 0;
+unsigned int count = 0;
+
+//static int32_t ecg_x[500];
+SPI mySpi(PIN_MOSI, PIN_MISO, PIN_SCLK) ; /* SPI is the spi function written in mbed and mySpi is the instance name*/
+
+typedef void (*func_ptr)(void) ; /*creates typedef to function pointer, does not take any arguement and returns void*/
+
+void doHelp(void) ;
+void doStatus(void) ;
+void doFreq(void) ;
+void doMode(void) ;
+void doBit(void) ;
+void doWrite(void) ;
+void doWrite2(void) ;
+void doRead(void) ;
+void doLoop(void) ;
+void setup(void);
+void testsetup(void);
+void ecgsetup(void);
+void regWrite(int,int);
+void cmdWrite(int);
+void regRead(int);
+void lpf_coef(void);
+float lpf( float coeff[5], float);
+void drdy_int(void);
+/*FILE *sd_openfile(char *buf);
+void sd_write (FILE *n,int value);
+void sd_close(FILE *n);
+time_t rtc_read();*/
+
+typedef struct _cmd_func {
+    char *name ;
+    func_ptr func ;
+} cmd_func_type ;
+
+cmd_func_type cmd_list[] = {   /*"cmd_func_type cmd_list[]" is same as "struct cmd_list[]"*/
+    {"help", doHelp},
+    {"status", doStatus},
+    {"freq", doFreq},
+    {"mode", doMode},
+    {"bit",  doBit},
+    {"write", doWrite},
+    {"read",  doRead},
+    {"loop", doLoop},
+    { 0, 0 }
+} ;
+
+func_ptr getFunc(char *cmd)  /*here "func_ptr is same as void*/
+{
+    int i = 0 ;
+    while(cmd_list[i].name != 0) {
+        if (strcmp(cmd, cmd_list[i].name) == 0) {
+            return(cmd_list[i].func) ; ;
+        }
+        i++ ;
+    }
+    return(0) ;
+}
+
+void doHello()
+{
+    printf("=== spi test program ===\n\r") ;
+    printf("please set your terminal program\n\r") ;
+    printf("local echo on\n\r") ;
+    printf("\n\r") ; 
+}
+    
+int ecg(int pid) {
+ //time_t epoch_time;
+  //int fp;
+ int concatenate_value = 0;
+ 
+//uint32_t ecg_buf[1500];
+//int32_t ecg_der[1500];
+//int buff1[15]= {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
+int32_t sample_sum; // static int32_t avg[1500];
+  count = 0; int32_t fs = 500; int32_t w=0,w1=0;
+Timer t;
+   unsigned char chk = 1;
+    pc.baud(baud_rate);
+    mySpi.frequency(freq) ;
+    mySpi.format(bits, mode) ; 
+  //  Ds3231 rtc(PTC11, PTC10); //sda,scl2yy
+   
+    
+
+   //Initialize ADS1291   
+    setup() ;  
+    
+    //Put device back in RDATAC mode
+    cmdWrite(CMD_RDATAC) ;
+//   printf("The device is in RDATAC mode\n");
+//Activate conversion, At this point DRDY should toggle
+    ADS_START = 1;
+     
+  //    printf( "ADC noise data is= \n");
+   for(int i=0;i<N_ERR;i++)
+     {
+     while(DRDY_BAR);
+    doWrite() ;
+    //printf( "ADC status is= %X %X %X\n", value1,value2,value3);
+    concatenate_value = ((value4<< LSHIFT_16)|(value5 <<LSHIFT_8) |(value6));
+ //   printf( "%X\n", concatenate_value);
+    }
+
+
+   /*testsetup();    // To set the ADS1291 registers for internal test signal generation
+    wait(0.2);
+    cmdWrite(CMD_RDATAC) ;
+    //printf("The device is in RDATAC mode\n");
+   // printf("Test data is\n");
+    ADS_START = 1;
+     //printf("Test data is\n");
+     sd_open_file();
+    
+    for(int j=0;j<N_TEST;j++)
+    {
+    while(DRDY_BAR);
+    doWrite() ;
+    concatenate_value = ((value4<< LSHIFT_16)|(value5 <<LSHIFT_8) |(value6));
+   
+    sd_write(concatenate_value);
+   pc.printf("%d\n",concatenate_value);
+ // fprintf(fp,"%d\n",concatenate_value) ;
+  }
+  sd_close();*/
+  
+ ecgsetup();   // To set the ADS1291 registers for ECG signal generation
+//  printf("\n Reading****");
+    //DRDY_BAR1.enable_irq();
+   cmdWrite(CMD_RDATAC) ;
+//    printf("The device is in RDATAC mode\n");
+    ADS_START = 1;
+    chk = 1;
+    t.start();
+   sd_open_ECGfile(pid);
+    for(int i=0; i<N_ECG; i++)
+    {
+    while(DRDY_BAR);
+    doWrite() ;
+    concatenate_value = ((value4<< 16)|(value5 <<8) |(value6));
+    sd_write(concatenate_value);
+    //printf( "%d\n", concatenate_value);
+    }
+   sd_close();
+   t.stop();
+   printf( "%f\n", t.read());
+ /* 
+  // remove DC of ecg signal    
+  uint32_t  ecg_mean=0, buf_length = 500; 
+ printf("DC removed\ ECG Data\n");
+  for (int k=0 ; k<buf_length ; k++ ) 
+        {ecg_mean = ecg_mean+ ecg_buf[k] ;
+       ///  printf("ecg_mean is %d\n",ecg_mean);
+         }
+   ecg_mean =ecg_mean/buf_length ;
+    //printf("ecg_mean is %d\n",ecg_mean);
+    for (k=0 ; k<buf_length ; k++ )  
+    {
+        ecg_x[k] =  ecg_buf[k] - ecg_mean ; 
+        printf("%d\n",(ecg_x[k]));
+  }
+  */
+ // 4 pt Moving Average
+ /*printf("Averaged ECG Data\n");
+    for(int k=0; k<N_ECG; k++)
+    {
+ //     sample_sum= ( ecg_x[k]+ecg_x[k+1]+ ecg_x[k+2]+ ecg_x[k+3]);
+        sample_sum= ( ecg_buf[k]+ecg_buf[k+1]+ ecg_buf[k+2]+ ecg_buf[k+3]);
+        ecg_buf[k]=  sample_sum/(int32_t)4; 
+      
+//        printf("%d\n",(ecg_buf[k]));
+    }
+    
+    // Derivative filtering of the averaged ECG signal
+//    printf("Derivative filtered ECG Data\n");
+    ecg_der[0]=0;
+    for(int k=0; k<N_ECG-3; k++)
+    {
+        w1= (fs*(ecg_buf[k+1]-ecg_buf[k]));
+        //w1=1;
+      //  w=0.995;
+      //  ecg_der[k]=(w+w1);
+        w=(1*ecg_der[k]); 
+        ecg_der[k+1]=(w1+w);
+         // printf("ecg_der[k+1]=%d\n",(ecg_der[k+1]));
+      //  printf("w=%f\n", w);
+      //  printf("w1=%f\n", w1);
+ //       printf("%d\n",(ecg_der[k]));
+        //printf("k=%d\n", k);
+    }*/
+ }    // End of main function
+
+//for initial configurations
+void setup()
+{
+   //initially make all inputs low until power is up and stabilized
+    CHIPSEL_BAR = 0;
+    ADS_START = 0;
+    RESET_BAR = 0;
+    //wait for oscillator to wake up
+    wait(1);     
+    
+    CHIPSEL_BAR = 1;
+    RESET_BAR = 1; //wait for tpor time
+    //wait for power on reset
+    wait(1);
+    RESET_BAR = 0; // send a reset pulse and wait for t_reset amount of time
+    wait(1);
+    RESET_BAR = 1;//release the reset
+    //Wait for 18 tclks = 36 us
+    wait_us(36);
+    
+    //Device wakes up in RDATAC mode so send SDATAC command to write to registers
+    cmdWrite(CMD_SDATAC) ;
+//    printf("Device is in SDATAC mode\n");
+    
+    regRead(REG_ID);
+    printf("DEVICE ID register read from ADS is= 0x%X\n",data1);
+    wait(1);
+    
+    //Since we are using internal 2.42V reference and enable clock on the CLK PIN
+    //Write 0xA8 to CONFIG2 register
+    regWrite(REG_CONFIG2,no_mode);
+       
+    //Set continuous sampling mode, 500 SPS
+    regWrite(REG_CONFIG1,sps500);
+        
+    //PGA Gain = 6, inputs shorted for noise measurements
+    regWrite(REG_CH1SET, offset_meas);
+    
+    //read data from CONFIG2 register
+    regRead(REG_CONFIG2);
+//    printf("REG_CONFIG2 register read from ADS for initial setup is= 0x%X\n",data1);
+    
+    //read data from CONFIG1 register
+    regRead(REG_CONFIG1);
+//    printf("REG_CONFIG1 register read from ADS for initial setup is= 0x%X\n",data1);
+    
+    //read data from CONFIG1 register
+    regRead(REG_CH1SET);
+//    printf("REG_CH1SET register read from ADS for initial setup is= 0x%X\n",data1);
+}   
+
+void testsetup()
+{
+ //Send SDATAC command to write to registers to set test signals 
+    cmdWrite(CMD_SDATAC) ;
+    printf("Device is in SDATAC mode\n");
+            
+    //Since we are using internal 2.42V reference and enable clock on the CLK PIN
+    //Write 0xA3 to CONFIG2 register to set test signal and its freq = 1Hz
+    regWrite(REG_CONFIG2,test_mode);
+       
+    //PGA Gain = 6, test signal selected
+    regWrite(REG_CH1SET, test_inp);
+    
+    //read data from CONFIG2 register
+    regRead(REG_CONFIG2);
+   printf("REG_CONFIG2 register read from ADS for test signal setup is= 0x%X\n",data1);
+    
+    //read data from CONFIG1 register
+    regRead(REG_CH1SET);
+   printf("REG_CH1SET register read from ADS for test signal setup is= 0x%X\n",data1);  
+}
+
+void ecgsetup()
+{
+cmdWrite(CMD_SDATAC) ; //Set to SDATAC mode to set CH1SET register
+
+regWrite(REG_CONFIG1,sps500);
+regWrite(REG_CONFIG2, default_mode);//put INT_TEST and TEST_FREQ bits to default mode(set those bits to '0')
+regWrite(REG_LOFF, loff_conf);
+regWrite(REG_CH1SET, elec_inp);// Set to read normal electrode input
+regWrite(REG_RLD_SENS, rld_sens_sig);//Set RLD_SENS
+regWrite(REG_LOFF_SENS, loff_sens_sig);//Set LOFF_SENS
+regWrite(REG_MISC1, misc1_inp );//Set RESP1
+regWrite(REG_MISC2, misc2_inp );//Set RESP2
+//printf("connect ECG leads\n");
+wait(0.5);
+regRead(REG_LOFF_STAT);//Read LOFF_STAT register
+printf("REG_LOFF_STAT register read from ADS for ecg setup is= 0x%X\n",data1); 
+}
+
+void doHelp(void) 
+{
+    printf("=== spi test ===\n\r") ;
+    printf("commands available\n\r") ;
+    printf("help\n\r") ;
+    printf("status\n\r") ;
+    printf("freq freq_in_hz\n\r") ;
+    printf("mode (0 | 1 | 2 | 3)\n\r") ;
+    printf("bit (4 - 16)\n\r") ;
+    printf("write value\n\r") ;
+    printf("read\n\r") ;
+    printf("loop number (set repeat number for read/write)\n\r") ;
+}
+
+void doStatus(void)
+{
+    printf("=== Status Report ===\n\r") ;
+    printf("bits: %d\n\r", bits) ;
+    printf("mode: %d\n\r", mode) ;
+    printf("freq: %d Hz\n\r", freq) ;
+    printf("loop: %d\n\r", loop) ;
+}
+
+void doFreq(void)
+{
+  //  int freq = 0 ;
+   // scanf("%d", &freq) ;
+    printf("setting frequency to %d\n\r", freq) ;
+    mySpi.frequency(freq) ;
+}
+
+void doMode(void)
+{
+    //scanf("%d", &mode) ;
+    printf("setting format(%d, %d)\n\r",bits, mode) ;
+    mySpi.format(bits, mode) ;       
+}
+
+void doBit(void) 
+{
+   // scanf("%d", &bits) ;
+    printf("setting format(%d, %d)\n\r",bits, mode) ;
+    mySpi.format(bits, mode) ;
+}
+
+void doWrite(void) 
+{    
+       
+     //DRDY_BAR1.disable_irq();
+      
+        CHIPSEL_BAR = 0;
+       // int freq1 = 50000;
+       // mySpi.frequency(freq1) ;
+        value1 =  mySpi.write(0x00);
+        value2 =  mySpi.write(0x00);
+        value3 =  mySpi.write(0x00);
+        value4 =  mySpi.write(0x00);
+        value5 =  mySpi.write(0x00);
+        value6 =  mySpi.write(0x00);
+      
+        CHIPSEL_BAR = 0;    
+        //DRDY_BAR1.enable_irq();
+}
+
+void doRead(void) 
+{
+    int dummy = 0 ;
+   
+    while(!DRDY_BAR)
+    ADS_START = 0;
+    
+        value = mySpi.write(dummy) ;
+         
+}
+
+void doLoop(void)
+{
+   // scanf("%d", &loop) ;
+    printf("repeat number has been set to %d\n\r", loop) ;
+}
+
+void cmdWrite(int data) 
+{
+         CHIPSEL_BAR = 0;
+         mySpi.write(data) ;
+         wait_ms(1);
+         CHIPSEL_BAR = 1;  
+}
+
+void regWrite(int address, int data) 
+{
+    int data_to_send = CMD_WREG << 5;
+    data_to_send = data_to_send | address;
+         CHIPSEL_BAR = 0;
+         mySpi.write(data_to_send);
+         wait_ms(1);
+         mySpi.write(0x00) ;
+         wait_ms(1);
+         mySpi.write(data) ;
+         wait_ms(1);
+         CHIPSEL_BAR = 1;  
+}
+
+void regRead(int address)
+{
+    int data_to_receive = CMD_RREG << 5;
+    data_to_receive = data_to_receive | address;
+         CHIPSEL_BAR = 0;
+         mySpi.write(data_to_receive);
+         wait_ms(1);
+         mySpi.write(0x00) ;
+         wait_ms(1);
+         data1 = mySpi.write(0x00) ;
+                  
+         //printf("DEVICE ID register read from ADS is= 0x%X\n",data1);
+         
+         //wait_ms(1);
+         CHIPSEL_BAR = 1;       
+}
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