Diff: ec_bp.cpp

Revision:

3:9a06c2bed650

Child:

11:9a6545c2eb5d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ec_bp.cpp	Fri Feb 10 10:39:13 2017 +0000
@@ -0,0 +1,343 @@
+#include "mbed.h"
+#include "ec_bp.h"
+//#include "ecg_dec.h"
+
+//PIN DECLARATIONS
+//Serial pc(USBTX,USBRX);
+SPI mySpi(PIN_MOSI, PIN_MISO, PIN_SCLK) ;
+DigitalIn DRDY_BAR(PTC8);
+ 
+DigitalOut CHIPSEL_BAR(PTD0);
+DigitalOut ADS_START(PTC16);
+DigitalOut RESET_BAR(PTC17);
+DigitalOut myled(LED1);
+PwmOut led(PTB18);
+ float value = 0;
+ unsigned int value1;
+ unsigned int value2;
+ unsigned int value3;
+ unsigned int value4;
+ unsigned int value5;
+ unsigned int value6;
+ unsigned int data1;
+ unsigned int count;
+
+//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 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 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") ; 
+}
+
+
+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;       
+}
+
+
+
+void freqset()
+{
+mySpi.frequency(freq) ;
+    mySpi.format(bits, mode) ; 
+    }
+    
+    
+    
+ void setupfunc()
+ {   
+    setup() ;  
+    cmdWrite(CMD_RDATAC) ;
+    ADS_START = 1;
+  } 
+  
+   void ecgsetupfunc()
+{ 
+   ecgsetup();   // To set the ADS1291 registers for ECG signal generation
+   cmdWrite(CMD_RDATAC) ;
+   ADS_START = 1; 
+  
+  }
+  
+    void ecgtestsetupfunc()
+{ 
+   testsetup();   // To set the ADS1291 registers for ECG signal generation
+   cmdWrite(CMD_RDATAC) ;
+   ADS_START = 1; 
+  
+  } 
+int readvalue()
+  {
+      int concatenate_value;
+      while(DRDY_BAR);
+    doWrite() ;
+    concatenate_value = ((value4<< 16)|(value5 <<8) |(value6));
+    
+  return  concatenate_value;
+  }
+  
+  
+  
+  
+  
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