Diff: main.cpp

Revision:

0:ea069e8429ef

diff -r 000000000000 -r ea069e8429ef main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 13 18:39:18 2017 +0000
@@ -0,0 +1,270 @@
+#include "mbed.h"
+#include "ADT7320_SPI.h"
+#include "math.h"
+#include "ADXL345_I2C.h"
+
+#define ESP_RXBUF_LEN 20
+
+
+// GRPEACH SMART HEALTH MONITOR WITH IOT FOR ELDER PEOPLE
+// Mbed Code for Renesas GR-PEACH REV-0
+// Released Under Creative Commons Attribution-ShareAlike 3.0 Unported Licence
+Serial pc(USBTX, USBRX); // tx, rx for USB Debug on PC
+Serial esp(D9, D8);      // tx, rx for ESP8266 Interfacing on UART
+
+ADT7320_SPI adt(D11, D12, D13, D10);   // mosi, miso, sclk, cs for ADT7320 Temperature Sensor
+Ticker acctick; // ticker for sample of adxl345 at every 10ms regardless what the loop doing
+
+ADXL345_I2C accelerometer(I2C_SDA,I2C_SCL); // sda and scl for ADXL345 Temperature Sensor 
+Timer timer; // timer for measure time interval between two heart beat Interrupts
+
+InterruptIn hr_int(P1_10);
+DigitalOut buz(D6);
+DigitalIn  loff(D7);
+DigitalIn  sosconf(P1_9);
+AnalogIn   ecg(P1_8);
+
+volatile char esp_buf[ESP_RXBUF_LEN]; // Circular Buffer for ESP8266 Serial Receive As MODSERIAL not supported in GRPeach 
+volatile uint32_t  esp_pos = 0, esp_por = 0, esp_ok = 0, esp_head = 0; // Variable used for hold head and tail of Circular Buffer
+
+volatile float ax,ay,az,a; 
+volatile float aavg = 50.0f;
+
+uint32_t pre_millis=0; 
+
+uint32_t hr = 100,hrmax = 170,hrmin = 60,bt = 35,btmax = 40,btmin = 30,ecgreq = 0,flagack = 0, hf = 0,bf = 0,ff = 0,sf = 0;
+
+// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ESP8266 UART Receive CallBack(ISR) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void esp_callback() {
+    esp_buf[esp_pos] = esp.getc();
+    if(esp_buf[esp_pos]== '#')
+    {
+        esp_ok = 1;    
+    } 
+    esp_pos = (esp_pos+1)% ESP_RXBUF_LEN;
+}
+
+//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Beep on buzzer <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void beep(unsigned int _beeps, float _on, float _off)
+{
+    unsigned int _i;
+    for(_i=0 ; _i<= _beeps; _i++)
+    {
+        buz = 1;
+        wait(_on);
+        buz = 0;
+        wait(_off);
+        
+    }
+    
+}
+
+// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ADXL345 Ticker CallBack(ISR) to detect Impact <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void acctick_isr() {
+     int   accraw[3] = {0, 0, 0};
+     accelerometer.getOutput(accraw);
+     ax = (float)((int16_t)accraw[0])/5.2f ;
+     ay = (float)((int16_t)accraw[1])/5.2f ;
+     az = (float)((int16_t)accraw[2])/5.2f ;
+     a = sqrt(pow(ax,2.0f) + pow(ay,2.0f) + pow(az,2.0f));
+     aavg = aavg*0.85f + a*0.15f;
+     if(aavg < 30.0f)
+     {
+        beep(2, 0.3f, 0.3f);
+        ff = 1;    
+     }
+     //printf("%3.1f%%\t%3.1f%%\r\n",aavg,a);
+     
+     //printf("%d\t%d\t%d\r\n",accraw[0],accraw[1],accraw[2]);
+}
+
+// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ADXL435 Accelerometer Initlization <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void adxl345_init(void)
+{
+     wait(.001);
+     accelerometer.getDeviceID();
+     wait(.001);
+     // These are here to test whether any of the initialization fails. 
+     accelerometer.setPowerControl(0x00);
+     //Full resolution, +/-16g, 4mg/LSB.
+     wait(.001);
+     accelerometer.setDataFormatControl(0x0B);
+     wait(.001);
+     //3.2kHz data rate.
+     accelerometer.setDataRate(ADXL345_3200HZ);
+     wait(.001);
+     //Measurement mode.
+     accelerometer.setPowerControl(MeasurementMode);      
+}
+
+// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ESP8266 UART returns how many chars available to read <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+int esp_available(void)
+{
+    return ((ESP_RXBUF_LEN + esp_pos - esp_por) % ESP_RXBUF_LEN);    
+}
+
+// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ESP8266 UART returns read one char <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+char esp_read(void)
+{
+    char c = esp_buf[esp_por];
+    esp_por = (esp_por + 1)% ESP_RXBUF_LEN;
+    return(c);
+}
+
+// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ESP8266 UART Flush receive Buffer <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void esp_flush(void)
+{
+    esp_pos = 0; 
+    esp_por = 0;   
+}
+
+// >>>>>>>>>>>>>>>>>>>>> ESP8266 UART returns comma seperated data points encapsulated between * and # <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+int esp_read_cmd()
+{
+   if (esp_ok == 1 )
+    {
+        char tmp[60];
+        char* temp;
+        esp_ok = false;
+        int _cnt = 0;
+        while(esp_read() != '*' );
+        tmp[_cnt] = esp_read();
+        while(tmp[_cnt] != '#')
+        {
+            _cnt++;
+            tmp[_cnt]= esp_read();    
+        }
+        tmp[_cnt] = '\0';
+        esp.printf("%s\r\n",tmp);
+        temp = strtok(tmp, ",");
+        hrmax = atoi(temp);
+        temp = strtok(NULL, ",");
+        hrmin = atoi(temp);
+        temp = strtok(NULL, ",");
+        btmax = atoi(temp);
+        temp = strtok(NULL, ",");
+        btmin = atoi(temp);
+        temp = strtok(NULL, ",");
+        ecgreq = atoi(temp);
+        temp = strtok(NULL, ",");
+        flagack = atoi(temp);
+        pc.printf("%d %d %d %d %d %d\r\n",hrmax,hrmin,btmax,btmin,ecgreq,flagack);
+        return 1;
+    }  
+    else return 0; 
+} 
+
+//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ECG/HR ISR <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void hr_isr()  
+{  
+  uint32_t _hr;  
+  _hr = timer.read_ms() - pre_millis;  
+  pre_millis = timer.read_ms();  
+  //pc.printf("premillis  = %d ",pre_millis);
+  _hr = 60000/_hr;  
+  if(_hr > 31 && _hr < 200)  
+  {
+    hr = ((hr*14) + _hr)/15;
+  } 
+  if(loff == 1)hr=31;
+  if(hr <= hrmin)hf = 1;
+  else if(hr >= hrmax)hf = 2;
+  else hf = 0;
+  //pc.printf("Heart Rate = %d \r\n",hr);  
+}  
+
+//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ECG capture Graph and send to ESP8266 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void esp_send_ecg(void)
+{
+     uint32_t _cnt = 0;
+     beep(4,0.2f,0.5f);
+     wait(2.0f);
+     beep(1,0.2f,0.1f);
+     for(_cnt=0; _cnt<410; _cnt++)
+     {
+        float raw = ecg.read();
+        uint32_t ecg_point = (uint32_t)(((raw*100.0f)-13.15f)*1.66f);
+        if(ecg_point > 99)ecg_point=99;
+        esp.printf("%d,",ecg_point);
+        pc.printf("%d,",ecg_point);
+        wait(0.01f);
+    }
+    esp.printf("10#");
+    pc.printf("10#\r\n");
+    pc.printf("ecg graph packet sent..\r\n");
+    beep(1,0.9f,0.1f);
+}
+   
+//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ECG capture Graph and send to ESP8266 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void esp_send_data(void)
+{
+    esp.printf("*%d,%d,%d,%d,%d,%d,%d,%d,%d,%d#",hr,hrmax,hrmin,bt,btmax,btmin,hf,bf,ff,sf);
+    pc.printf("*%d,%d,%d,%d,%d,%d,%d,%d,%d,%d#\r\rn",hr,hrmax,hrmin,bt,btmax,btmin,hf,bf,ff,sf);
+    pc.printf("data packet sent..\r\n");
+}
+
+//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Read ADT7320 Temperature sensor & bf flag <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
+void read_adt_temp(void)
+{
+    bt = (uint32_t)(adt.readTemp());
+    if(bt <= btmin)bf = 1;
+    else if(bf >= btmax)bf = 2;
+    else bf = 0;
+}
+
+//***************************************** MAIN FUNCTION ******************************************* 
+int main() {
+    uint32_t loop_cnt = 0;
+    wait(0.2f);
+    pc.baud(9600);
+    esp.baud(9600);
+    esp.attach(&esp_callback);
+    adxl345_init();
+    wait(0.01f);
+    acctick.attach(&acctick_isr, 0.02);
+    timer.start();
+    hr_int.rise(&hr_isr);
+    buz = 0; 
+    for (int ap=0; ap<=50; ap++)
+    {
+        if(sosconf == 0) beep(1,1.0f,0.2f);
+        wait(0.1f);
+    }
+  
+    // Do forever.
+    while(1)
+    {
+        esp_read_cmd();
+        read_adt_temp();
+        if(ecgreq == 1)
+        {
+            esp_send_ecg();
+            ecgreq = 0;
+        }
+        
+        if(loop_cnt >= 50)
+        {
+            esp_send_data();
+            loop_cnt = 0;    
+        }
+        
+        if(flagack == 1)
+        {
+            beep(3,0.4f,0.4f);
+            flagack = 0;
+            sf = 0;
+            ff=0;
+            hf=0;
+            bf=0;
+        }
+        
+        if(sosconf == 0)
+        {
+            beep(3,0.4f,0.4f);
+            sf = 1;
+        }
+        loop_cnt++;
+        wait(0.1f);
+    }
+   
+ }
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