working - HRTC, MUX

Dependencies:   MAX30003 ds3231 max32630fthr

Committer:
parthsagar2010
Date:
Tue Dec 21 01:27:49 2021 +0000
Revision:
24:fc2c2d105e6a
Parent:
23:7590d93dfa5f
k

Who changed what in which revision?

UserRevisionLine numberNew contents of line
coreyharris 6:86ac850c718d 1
parthsagar2010 8:6b9359f81cc0 2 #include "MAX30003.h"
coreyharris 0:38c49bc37c7c 3 #include "mbed.h"
coreyharris 0:38c49bc37c7c 4 #include "max32630fthr.h"
kidecha_rahul 22:07eec382c267 5 //#include "ds1307.h"
parthsagar2010 11:300afaf2696b 6 //#include <BufferedSerial.h>
kidecha_rahul 22:07eec382c267 7 //#include <string>
parthsagar2010 10:54aa50490b15 8 //#include <Serial.h>
kidecha_rahul 17:f0008ebb1040 9 #include "ds3231.h"
parthsagar2010 11:300afaf2696b 10
kidecha_rahul 18:101042d225ef 11 #define TARGET_TX_PIN P3_1
kidecha_rahul 18:101042d225ef 12 #define TARGET_RX_PIN P3_0
parthsagar2010 11:300afaf2696b 13
kidecha_rahul 17:f0008ebb1040 14 #define SDA P3_4
kidecha_rahul 17:f0008ebb1040 15 #define SCL P3_5
kidecha_rahul 17:f0008ebb1040 16
kidecha_rahul 22:07eec382c267 17 //Timer timer_fast;
kidecha_rahul 22:07eec382c267 18 //Timer t;
coreyharris 0:38c49bc37c7c 19 MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
coreyharris 0:38c49bc37c7c 20
kidecha_rahul 22:07eec382c267 21 //void task_fast(void);
kidecha_rahul 18:101042d225ef 22 //DigitalOut ledA(LED2);
parthsagar2010 13:0e7bbc06083f 23
kidecha_rahul 19:7a084dc2f09d 24 //DigitalOut EN(P1_7);
kidecha_rahul 19:7a084dc2f09d 25 //DigitalOut A0(P1_4);
kidecha_rahul 19:7a084dc2f09d 26 //DigitalOut A1(P7_2);
kidecha_rahul 19:7a084dc2f09d 27
kidecha_rahul 22:07eec382c267 28 // mux controller pins
kidecha_rahul 23:7590d93dfa5f 29 DigitalOut S0(P4_0); //blue
kidecha_rahul 23:7590d93dfa5f 30 DigitalOut S1(P5_6);
kidecha_rahul 23:7590d93dfa5f 31 //DigitalOut S2(P3_3);
kidecha_rahul 23:7590d93dfa5f 32 //DigitalOut S3(P3_2); //white
kidecha_rahul 19:7a084dc2f09d 33
kidecha_rahul 22:07eec382c267 34 //channel feedback
kidecha_rahul 23:7590d93dfa5f 35 DigitalIn A(P5_5); //P17
kidecha_rahul 23:7590d93dfa5f 36 //DigitalIn B(P6_0); //P18
kidecha_rahul 23:7590d93dfa5f 37 //DigitalIn C(P4_0); //P19
kidecha_rahul 21:193a10530741 38
kidecha_rahul 19:7a084dc2f09d 39
parthsagar2010 16:520034b124b6 40
coreyharris 0:38c49bc37c7c 41 void ecg_config(MAX30003 &ecgAFE);
parthsagar2010 11:300afaf2696b 42 //BufferedSerial pc(P3_1,P3_0); // Use USB debug probe for serial link static Unbuffered
parthsagar2010 15:0356e9454a60 43 static BufferedSerial pc(TARGET_TX_PIN, TARGET_RX_PIN, 230400); // 230400 works well
parthsagar2010 11:300afaf2696b 44
parthsagar2010 10:54aa50490b15 45 //Serial uart_1(USBTX, USBRX); // Use USB debug probe for serial link static Unbuffered
parthsagar2010 10:54aa50490b15 46 //
parthsagar2010 10:54aa50490b15 47 //Serial pc(P3_1,P3_0);
coreyharris 0:38c49bc37c7c 48 volatile bool ecgFIFOIntFlag = 0;
kidecha_rahul 22:07eec382c267 49 //volatile bool timerflag = 0;
parthsagar2010 11:300afaf2696b 50
parthsagar2010 11:300afaf2696b 51 FileHandle *mbed::mbed_override_console(int fd)
parthsagar2010 11:300afaf2696b 52 {
parthsagar2010 11:300afaf2696b 53 return &pc;
parthsagar2010 11:300afaf2696b 54 }
parthsagar2010 11:300afaf2696b 55
parthsagar2010 8:6b9359f81cc0 56 void ecgFIFO_callback_1() { // Triggered when the ECG FIFO is about to be full
coreyharris 0:38c49bc37c7c 57
coreyharris 0:38c49bc37c7c 58 ecgFIFOIntFlag = 1;
coreyharris 0:38c49bc37c7c 59 }
coreyharris 0:38c49bc37c7c 60
kidecha_rahul 21:193a10530741 61
parthsagar2010 11:300afaf2696b 62 int main(void)
coreyharris 3:420d5efbd967 63 {
parthsagar2010 16:520034b124b6 64 int t=0;
kidecha_rahul 21:193a10530741 65
kidecha_rahul 19:7a084dc2f09d 66
kidecha_rahul 19:7a084dc2f09d 67 S0=0;
parthsagar2010 24:fc2c2d105e6a 68 S1=0;
kidecha_rahul 23:7590d93dfa5f 69 // S2=0;
kidecha_rahul 23:7590d93dfa5f 70 // S3=0;
parthsagar2010 16:520034b124b6 71
parthsagar2010 16:520034b124b6 72
kidecha_rahul 19:7a084dc2f09d 73
parthsagar2010 11:300afaf2696b 74 // Constants
coreyharris 4:06e258ff0b97 75 const int EINT_STATUS_MASK = 1 << 23;
coreyharris 6:86ac850c718d 76 const int FIFO_OVF_MASK = 0x7;
coreyharris 6:86ac850c718d 77 const int FIFO_VALID_SAMPLE_MASK = 0x0;
coreyharris 6:86ac850c718d 78 const int FIFO_FAST_SAMPLE_MASK = 0x1;
coreyharris 6:86ac850c718d 79 const int ETAG_BITS_MASK = 0x7;
kidecha_rahul 17:f0008ebb1040 80
kidecha_rahul 23:7590d93dfa5f 81
kidecha_rahul 23:7590d93dfa5f 82
kidecha_rahul 17:f0008ebb1040 83 //-------------------------------------------------------------RTC-------------------------------------------------------------//
kidecha_rahul 23:7590d93dfa5f 84 //instantiate rtc object
kidecha_rahul 17:f0008ebb1040 85 Ds3231 rtc(SDA, SCL);
kidecha_rahul 23:7590d93dfa5f 86 if (A==0)
kidecha_rahul 23:7590d93dfa5f 87 {
kidecha_rahul 23:7590d93dfa5f 88 uint16_t rtn_val;
kidecha_rahul 23:7590d93dfa5f 89 //time = 12:00:00 AM 12hr mode
parthsagar2010 24:fc2c2d105e6a 90 ds3231_time_t time = {50,40,13,1,0}; //seconds, min, hours, am=0/pm=1, mode 12=1/24=0
kidecha_rahul 17:f0008ebb1040 91
kidecha_rahul 17:f0008ebb1040 92 rtn_val = rtc.set_time(time);
kidecha_rahul 17:f0008ebb1040 93
kidecha_rahul 23:7590d93dfa5f 94 //see datasheet for calendar format
parthsagar2010 24:fc2c2d105e6a 95 ds3231_calendar_t calendar = {5,2,9,21}; //day date month year
kidecha_rahul 17:f0008ebb1040 96
kidecha_rahul 23:7590d93dfa5f 97 rtn_val = rtc.set_calendar(calendar);
kidecha_rahul 17:f0008ebb1040 98
kidecha_rahul 17:f0008ebb1040 99 //see datasheet for calendar format
kidecha_rahul 23:7590d93dfa5f 100 ds3231_cntl_stat_t data = {0x1C, 0x08};
kidecha_rahul 17:f0008ebb1040 101
kidecha_rahul 23:7590d93dfa5f 102 rtn_val = rtc.set_cntl_stat_reg(data);
kidecha_rahul 23:7590d93dfa5f 103 }//------------------------------------------------------------------------------------------------------------------------------//
kidecha_rahul 17:f0008ebb1040 104
kidecha_rahul 17:f0008ebb1040 105
kidecha_rahul 22:07eec382c267 106 //timer_fast.start();
parthsagar2010 15:0356e9454a60 107 DigitalOut rLed(LED2, LED_ON);
parthsagar2010 10:54aa50490b15 108 // pc.baud(9600);
coreyharris 3:420d5efbd967 109
parthsagar2010 11:300afaf2696b 110 //pc.set_baud(115200); // Baud rate = 115200
parthsagar2010 11:300afaf2696b 111 //pc.set_format(
parthsagar2010 11:300afaf2696b 112 // /* bits */ 8,
parthsagar2010 11:300afaf2696b 113 // /* parity */ BufferedSerial::None,
parthsagar2010 11:300afaf2696b 114 // /* stop bit */ 1 //1
parthsagar2010 11:300afaf2696b 115 //);
parthsagar2010 10:54aa50490b15 116 //uart_1.baud(115200);
coreyharris 1:86843c27cc81 117 InterruptIn ecgFIFO_int(P5_4); // Config P5_4 as int. in for the
parthsagar2010 8:6b9359f81cc0 118 ecgFIFO_int.fall(&ecgFIFO_callback_1); // ecg FIFO interrupt at falling edge
coreyharris 0:38c49bc37c7c 119
coreyharris 1:86843c27cc81 120 SPI spiBus(SPI2_MOSI, SPI2_MISO, SPI2_SCK); // SPI bus, P5_1 = MOSI,
coreyharris 1:86843c27cc81 121 // P5_2 = MISO, P5_0 = SCK
parthsagar2010 10:54aa50490b15 122
coreyharris 4:06e258ff0b97 123 MAX30003 ecgAFE(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3
parthsagar2010 8:6b9359f81cc0 124
coreyharris 4:06e258ff0b97 125 ecg_config(ecgAFE); // Config ECG
parthsagar2010 12:10b49ad3c492 126
coreyharris 0:38c49bc37c7c 127
coreyharris 4:06e258ff0b97 128 ecgAFE.writeRegister( MAX30003::SYNCH , 0);
coreyharris 0:38c49bc37c7c 129
coreyharris 4:06e258ff0b97 130 uint32_t ecgFIFO, readECGSamples, idx, ETAG[32], status;
coreyharris 1:86843c27cc81 131 int16_t ecgSample[32];
parthsagar2010 9:24ecf16eab0f 132 //bool timerflag = false;
kidecha_rahul 22:07eec382c267 133 int16_t ecgSample_1sec[125];
parthsagar2010 10:54aa50490b15 134 uint8_t ecg_1 = 0;
parthsagar2010 10:54aa50490b15 135 uint8_t ecg_2 = 0;
parthsagar2010 10:54aa50490b15 136 uint16_t onesec_counter = 0;
parthsagar2010 10:54aa50490b15 137 uint16_t onesec_counter_temp = 0;
parthsagar2010 10:54aa50490b15 138
kidecha_rahul 22:07eec382c267 139 // int16_t sample = 300;
kidecha_rahul 22:07eec382c267 140 // uint8_t final[10];
parthsagar2010 12:10b49ad3c492 141
parthsagar2010 10:54aa50490b15 142 uint16_t checksum_ = 0;
parthsagar2010 10:54aa50490b15 143 uint16_t mod_checksum = 0;
parthsagar2010 10:54aa50490b15 144
parthsagar2010 10:54aa50490b15 145 uint8_t p_1 = 0;
parthsagar2010 10:54aa50490b15 146 uint8_t p_2 = 0;
parthsagar2010 10:54aa50490b15 147 uint8_t p_3 = 0;
parthsagar2010 10:54aa50490b15 148 uint8_t p_4 = 0;
kidecha_rahul 18:101042d225ef 149 // uint8_t channel_num= 1;
kidecha_rahul 20:2e999e6568c1 150 uint8_t channel_num[1]= {0};
parthsagar2010 10:54aa50490b15 151 uint8_t data_len_1 = 0;
parthsagar2010 10:54aa50490b15 152 uint8_t data_len_2 = 0;
parthsagar2010 12:10b49ad3c492 153 uint32_t packet_1 = 0;
parthsagar2010 10:54aa50490b15 154 uint8_t cksm_1 = 0;
parthsagar2010 10:54aa50490b15 155 uint8_t cksm_2 = 0;
parthsagar2010 10:54aa50490b15 156 uint8_t header_device_id[3] = {0,0,210};
kidecha_rahul 19:7a084dc2f09d 157 // uint8_t header_device_id[3] = {0,0,1}; //for rahul
parthsagar2010 10:54aa50490b15 158 uint8_t header_packet_type[2] = {0,2};
parthsagar2010 10:54aa50490b15 159
parthsagar2010 10:54aa50490b15 160 uint8_t ending[5] = {'@','#','%','!','7'};
parthsagar2010 10:54aa50490b15 161
parthsagar2010 15:0356e9454a60 162 bool flip = true;
kidecha_rahul 22:07eec382c267 163 uint8_t sampleps = 0;
parthsagar2010 15:0356e9454a60 164
parthsagar2010 16:520034b124b6 165 char buf[20];//={"1622326341"};
parthsagar2010 15:0356e9454a60 166 // pc.write("Welcome",8*sizeof(char));
parthsagar2010 15:0356e9454a60 167 // printf("In the main loop"); //printf("In the main loop");
parthsagar2010 11:300afaf2696b 168 bool flag_first = false;
parthsagar2010 15:0356e9454a60 169 bool timestamp_reader = false;
kidecha_rahul 17:f0008ebb1040 170
kidecha_rahul 17:f0008ebb1040 171
kidecha_rahul 19:7a084dc2f09d 172 //---------------------------------hardware RTC check---------------------------------------------//
kidecha_rahul 17:f0008ebb1040 173 time_t epoch_time;
kidecha_rahul 17:f0008ebb1040 174
kidecha_rahul 17:f0008ebb1040 175 do {
kidecha_rahul 23:7590d93dfa5f 176 // rtc.get_time(&time);
kidecha_rahul 23:7590d93dfa5f 177 // rtc.get_calendar(&calendar);
kidecha_rahul 17:f0008ebb1040 178 epoch_time = rtc.get_epoch();
kidecha_rahul 17:f0008ebb1040 179 //printf("seconds since the Epoch: %ld\n", epoch_time);
parthsagar2010 12:10b49ad3c492 180
kidecha_rahul 17:f0008ebb1040 181 packet_1 = epoch_time;
kidecha_rahul 23:7590d93dfa5f 182 }while((epoch_time % 60)!=0); // come out at the start of minute
kidecha_rahul 23:7590d93dfa5f 183
kidecha_rahul 19:7a084dc2f09d 184
kidecha_rahul 17:f0008ebb1040 185
parthsagar2010 16:520034b124b6 186 while(1)
parthsagar2010 9:24ecf16eab0f 187 {
kidecha_rahul 19:7a084dc2f09d 188
parthsagar2010 15:0356e9454a60 189 if ((onesec_counter>=125))
kidecha_rahul 23:7590d93dfa5f 190 { //t++;
parthsagar2010 11:300afaf2696b 191 //t.start();
parthsagar2010 10:54aa50490b15 192 //ledA = !ledA;
kidecha_rahul 18:101042d225ef 193 pc.write((uint8_t *)header_device_id, sizeof(header_device_id)); // device ID
parthsagar2010 10:54aa50490b15 194
kidecha_rahul 18:101042d225ef 195 pc.write((uint8_t *)header_packet_type, sizeof(header_packet_type)); // packet type
kidecha_rahul 18:101042d225ef 196
kidecha_rahul 17:f0008ebb1040 197 epoch_time = rtc.get_epoch();
kidecha_rahul 17:f0008ebb1040 198 //time_t seconds = time(NULL); // if remove it the timestamp will be static
kidecha_rahul 17:f0008ebb1040 199 packet_1 = epoch_time; //
parthsagar2010 12:10b49ad3c492 200 //packet_1 ++;
parthsagar2010 15:0356e9454a60 201 // printf("Time as seconds since January 1, 1970 = %d\n", packet_1);
parthsagar2010 10:54aa50490b15 202 p_1 = packet_1 & 0xff;
parthsagar2010 10:54aa50490b15 203 p_2 = (packet_1 >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 204 p_3 = (packet_1 >> 16) & 0xff;
parthsagar2010 10:54aa50490b15 205 p_4 = (packet_1 >> 24) & 0xff;
parthsagar2010 10:54aa50490b15 206 // checksum_ = checksum_ + (packet_1 & 0xffff) + ((packet_1 >> 16) & 0xffff) ;
parthsagar2010 10:54aa50490b15 207 checksum_ = checksum_ + p_1 + p_2 + p_3 + p_4 ;
parthsagar2010 10:54aa50490b15 208 uint8_t header_packet_id[4] = {p_4,p_3,p_2,p_1};
kidecha_rahul 18:101042d225ef 209 pc.write((uint8_t *)header_packet_id, sizeof(header_packet_id)); // packet ID
kidecha_rahul 18:101042d225ef 210
kidecha_rahul 18:101042d225ef 211
parthsagar2010 16:520034b124b6 212 pc.write((uint8_t *)channel_num, sizeof(channel_num));
kidecha_rahul 18:101042d225ef 213
parthsagar2010 10:54aa50490b15 214 onesec_counter_temp = onesec_counter * 2;
parthsagar2010 10:54aa50490b15 215 data_len_1 = onesec_counter_temp & 0xff;
parthsagar2010 10:54aa50490b15 216 data_len_2 = (onesec_counter_temp >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 217 checksum_ = checksum_ + data_len_1 + data_len_2;
parthsagar2010 10:54aa50490b15 218 //pc.write((uint32_t *)packet_1, sizeof(packet_1));
parthsagar2010 10:54aa50490b15 219 uint8_t header_ecg_datalen[2] = {data_len_2,data_len_1};
parthsagar2010 10:54aa50490b15 220 pc.write((uint8_t *)header_ecg_datalen, sizeof(header_ecg_datalen));
kidecha_rahul 18:101042d225ef 221
parthsagar2010 10:54aa50490b15 222 mod_checksum = checksum_ % 65536 ;
parthsagar2010 10:54aa50490b15 223 cksm_1 = mod_checksum & 0xff;
parthsagar2010 10:54aa50490b15 224 cksm_2 = (mod_checksum >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 225 uint8_t header_ecg_checksum[2] = {cksm_2,cksm_1};
parthsagar2010 10:54aa50490b15 226 pc.write((uint8_t *)header_ecg_checksum, sizeof(header_ecg_checksum));
parthsagar2010 10:54aa50490b15 227
parthsagar2010 10:54aa50490b15 228 pc.write((int16_t *)ecgSample_1sec,onesec_counter * sizeof(int16_t));
parthsagar2010 15:0356e9454a60 229 // printf("Samples per second %d \n", (onesec_counter));
parthsagar2010 10:54aa50490b15 230 onesec_counter = 0;
parthsagar2010 10:54aa50490b15 231 // memset(ecgSample_1sec, 0, sizeof(ecgSample_1sec));
parthsagar2010 10:54aa50490b15 232
parthsagar2010 10:54aa50490b15 233 pc.write((uint8_t *)ending, sizeof(ending));
parthsagar2010 10:54aa50490b15 234 checksum_ = 0;
parthsagar2010 15:0356e9454a60 235 //t.stop();
parthsagar2010 11:300afaf2696b 236 // auto us = t.elapsed_time().count();
parthsagar2010 15:0356e9454a60 237 // float time_taken = us/1000000;
parthsagar2010 15:0356e9454a60 238 // printf("Timer time: %lu ms \n", (time_taken*100));
parthsagar2010 15:0356e9454a60 239 // t.reset();
parthsagar2010 15:0356e9454a60 240 // timer_fast.reset();
kidecha_rahul 19:7a084dc2f09d 241
kidecha_rahul 19:7a084dc2f09d 242 if (t==10) //C1
kidecha_rahul 19:7a084dc2f09d 243 {
kidecha_rahul 19:7a084dc2f09d 244 S0=1;
kidecha_rahul 19:7a084dc2f09d 245 S1=0;
kidecha_rahul 23:7590d93dfa5f 246 //S2=0;
kidecha_rahul 23:7590d93dfa5f 247 //S3=0;
kidecha_rahul 20:2e999e6568c1 248 channel_num[0]= {1};
kidecha_rahul 19:7a084dc2f09d 249 }
kidecha_rahul 19:7a084dc2f09d 250 if (t==20) //C2
kidecha_rahul 19:7a084dc2f09d 251 {
kidecha_rahul 19:7a084dc2f09d 252 S0=0;
kidecha_rahul 19:7a084dc2f09d 253 S1=1;
kidecha_rahul 23:7590d93dfa5f 254 //S2=0;
kidecha_rahul 23:7590d93dfa5f 255 //S3=0;
kidecha_rahul 20:2e999e6568c1 256 channel_num[0]= {2};
kidecha_rahul 19:7a084dc2f09d 257 }
kidecha_rahul 19:7a084dc2f09d 258
kidecha_rahul 19:7a084dc2f09d 259 if (t==30) // C0
kidecha_rahul 19:7a084dc2f09d 260 {
kidecha_rahul 19:7a084dc2f09d 261 S0=0;
kidecha_rahul 19:7a084dc2f09d 262 S1=0;
kidecha_rahul 23:7590d93dfa5f 263 //S2=0;
kidecha_rahul 23:7590d93dfa5f 264 //S3=0;
kidecha_rahul 20:2e999e6568c1 265 channel_num[0]= {0};
kidecha_rahul 19:7a084dc2f09d 266 t=0;}
kidecha_rahul 21:193a10530741 267
kidecha_rahul 23:7590d93dfa5f 268 /* if (A==0) //5_7 = P17
kidecha_rahul 22:07eec382c267 269 {//t=50;
kidecha_rahul 22:07eec382c267 270 S0=0;
kidecha_rahul 22:07eec382c267 271 S1=0;
kidecha_rahul 22:07eec382c267 272 S2=0;
kidecha_rahul 22:07eec382c267 273 S3=0;
kidecha_rahul 22:07eec382c267 274 channel_num[0]= {0};}
kidecha_rahul 22:07eec382c267 275
kidecha_rahul 22:07eec382c267 276 if (B==0) // 6_0 = P18
kidecha_rahul 22:07eec382c267 277 {
kidecha_rahul 21:193a10530741 278 S0=1;
kidecha_rahul 21:193a10530741 279 S1=0;
kidecha_rahul 21:193a10530741 280 S2=0;
kidecha_rahul 21:193a10530741 281 S3=0;
kidecha_rahul 22:07eec382c267 282 channel_num[0]= {1};}
kidecha_rahul 22:07eec382c267 283
kidecha_rahul 22:07eec382c267 284 if (C==0) // 4_0 = P19
kidecha_rahul 22:07eec382c267 285 {
kidecha_rahul 21:193a10530741 286 S0=0;
kidecha_rahul 21:193a10530741 287 S1=1;
kidecha_rahul 21:193a10530741 288 S2=0;
kidecha_rahul 21:193a10530741 289 S3=0;
kidecha_rahul 23:7590d93dfa5f 290 channel_num[0]= {2};} */
kidecha_rahul 19:7a084dc2f09d 291
parthsagar2010 9:24ecf16eab0f 292 }
coreyharris 4:06e258ff0b97 293 // Read back ECG samples from the FIFO
kidecha_rahul 20:2e999e6568c1 294 else if(ecgFIFOIntFlag==1)// && (timerflag == 0))
parthsagar2010 9:24ecf16eab0f 295 {
coreyharris 2:812d40f1853d 296
coreyharris 5:f8d1f651bef5 297 ecgFIFOIntFlag = 0;
coreyharris 4:06e258ff0b97 298 status = ecgAFE.readRegister( MAX30003::STATUS ); // Read the STATUS register
coreyharris 2:812d40f1853d 299
coreyharris 3:420d5efbd967 300 // Check if EINT interrupt asserted
parthsagar2010 9:24ecf16eab0f 301 if ( ( status & EINT_STATUS_MASK ) == EINT_STATUS_MASK )
parthsagar2010 9:24ecf16eab0f 302 {
coreyharris 3:420d5efbd967 303
coreyharris 4:06e258ff0b97 304 readECGSamples = 0; // Reset sample counter
coreyharris 3:420d5efbd967 305
coreyharris 2:812d40f1853d 306 do {
coreyharris 6:86ac850c718d 307 ecgFIFO = ecgAFE.readRegister( MAX30003::ECG_FIFO ); // Read FIFO
coreyharris 4:06e258ff0b97 308 ecgSample[readECGSamples] = ecgFIFO >> 8; // Isolate voltage data
parthsagar2010 10:54aa50490b15 309 ecgSample[readECGSamples] = ((ecgSample[readECGSamples]<<8)&0xFF00)|((ecgSample[readECGSamples]>>8)&0x00FF);
coreyharris 6:86ac850c718d 310 ETAG[readECGSamples] = ( ecgFIFO >> 3 ) & ETAG_BITS_MASK; // Isolate ETAG
coreyharris 4:06e258ff0b97 311 readECGSamples++; // Increment sample counter
coreyharris 3:420d5efbd967 312
coreyharris 3:420d5efbd967 313 // Check that sample is not last sample in FIFO
coreyharris 6:86ac850c718d 314 } while ( ETAG[readECGSamples-1] == FIFO_VALID_SAMPLE_MASK ||
coreyharris 6:86ac850c718d 315 ETAG[readECGSamples-1] == FIFO_FAST_SAMPLE_MASK );
coreyharris 2:812d40f1853d 316
coreyharris 3:420d5efbd967 317 // Check if FIFO has overflowed
parthsagar2010 9:24ecf16eab0f 318 if( ETAG[readECGSamples - 1] == FIFO_OVF_MASK )
parthsagar2010 9:24ecf16eab0f 319 {
coreyharris 3:420d5efbd967 320 ecgAFE.writeRegister( MAX30003::FIFO_RST , 0); // Reset FIFO
johnGreeneMaxim 7:cf0855a0450a 321 rLed = 1;//notifies the user that an over flow occured
coreyharris 3:420d5efbd967 322 }
parthsagar2010 10:54aa50490b15 323 //uint8_t header_ecg_checksum[2] = {'%','%'};
parthsagar2010 10:54aa50490b15 324 //pc.write((uint8_t *)header_ecg_checksum, sizeof(header_ecg_checksum));
coreyharris 3:420d5efbd967 325
parthsagar2010 10:54aa50490b15 326 //pc.write((int16_t *)ecgSample,readECGSamples * sizeof(int16_t ));
parthsagar2010 10:54aa50490b15 327 //memcpy(ecgSample_1sec , ecgSample, sizeof(ecgSample));
parthsagar2010 10:54aa50490b15 328
parthsagar2010 10:54aa50490b15 329 //memcpy(ecgSample_1sec + (onesec_counter * sizeof(int16_t)), ecgSample, sizeof(ecgSample));
parthsagar2010 15:0356e9454a60 330
parthsagar2010 15:0356e9454a60 331 if (flip)
parthsagar2010 15:0356e9454a60 332 {
parthsagar2010 15:0356e9454a60 333 sampleps = 12;
parthsagar2010 15:0356e9454a60 334 //printf("Flipped 12\r\n");
parthsagar2010 15:0356e9454a60 335 }
parthsagar2010 15:0356e9454a60 336 else
parthsagar2010 15:0356e9454a60 337 {
parthsagar2010 15:0356e9454a60 338 sampleps = 13;
parthsagar2010 15:0356e9454a60 339 // printf("Flipped 13\r\n");
parthsagar2010 15:0356e9454a60 340 }
parthsagar2010 15:0356e9454a60 341
parthsagar2010 15:0356e9454a60 342 for( idx = 0; idx < sampleps; idx++ )
parthsagar2010 9:24ecf16eab0f 343 {
parthsagar2010 9:24ecf16eab0f 344 //pc.printf("%6d\r\n", ecgSample[idx]);
parthsagar2010 9:24ecf16eab0f 345 ecgSample_1sec[onesec_counter] = ecgSample[idx];
parthsagar2010 10:54aa50490b15 346
parthsagar2010 10:54aa50490b15 347 cksm_1 = ecgSample[idx] & 0xff;
parthsagar2010 10:54aa50490b15 348 cksm_2 = (ecgSample[idx] >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 349 checksum_ += cksm_1 + cksm_2;
parthsagar2010 9:24ecf16eab0f 350 onesec_counter++;
coreyharris 6:86ac850c718d 351 }
parthsagar2010 15:0356e9454a60 352 flip =!flip;
parthsagar2010 15:0356e9454a60 353 rLed = ! rLed;
coreyharris 0:38c49bc37c7c 354 }
parthsagar2010 10:54aa50490b15 355
coreyharris 0:38c49bc37c7c 356 }
coreyharris 0:38c49bc37c7c 357 }
coreyharris 0:38c49bc37c7c 358 }
coreyharris 0:38c49bc37c7c 359
coreyharris 0:38c49bc37c7c 360
coreyharris 0:38c49bc37c7c 361
coreyharris 0:38c49bc37c7c 362
coreyharris 0:38c49bc37c7c 363 void ecg_config(MAX30003& ecgAFE) {
coreyharris 0:38c49bc37c7c 364
coreyharris 1:86843c27cc81 365 // Reset ECG to clear registers
coreyharris 1:86843c27cc81 366 ecgAFE.writeRegister( MAX30003::SW_RST , 0);
coreyharris 0:38c49bc37c7c 367
coreyharris 1:86843c27cc81 368 // General config register setting
coreyharris 1:86843c27cc81 369 MAX30003::GeneralConfiguration_u CNFG_GEN_r;
coreyharris 3:420d5efbd967 370 CNFG_GEN_r.bits.en_ecg = 1; // Enable ECG channel
kidecha_rahul 21:193a10530741 371 CNFG_GEN_r.bits.fmstr = 1; // set frequency to 32000kHz
coreyharris 3:420d5efbd967 372 CNFG_GEN_r.bits.rbiasn = 1; // Enable resistive bias on negative input
coreyharris 3:420d5efbd967 373 CNFG_GEN_r.bits.rbiasp = 1; // Enable resistive bias on positive input
coreyharris 3:420d5efbd967 374 CNFG_GEN_r.bits.en_rbias = 1; // Enable resistive bias
coreyharris 3:420d5efbd967 375 CNFG_GEN_r.bits.imag = 2; // Current magnitude = 10nA
coreyharris 3:420d5efbd967 376 CNFG_GEN_r.bits.en_dcloff = 1; // Enable DC lead-off detection
parthsagar2010 12:10b49ad3c492 377 //CNFG_GEN_r.bits.fmstr = 1; //125 sps FMSTR 1
coreyharris 1:86843c27cc81 378 ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all);
coreyharris 1:86843c27cc81 379
coreyharris 1:86843c27cc81 380
coreyharris 1:86843c27cc81 381 // ECG Config register setting
coreyharris 1:86843c27cc81 382 MAX30003::ECGConfiguration_u CNFG_ECG_r;
coreyharris 3:420d5efbd967 383 CNFG_ECG_r.bits.dlpf = 1; // Digital LPF cutoff = 40Hz
coreyharris 3:420d5efbd967 384 CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz
coreyharris 3:420d5efbd967 385 CNFG_ECG_r.bits.gain = 3; // ECG gain = 160V/V
kidecha_rahul 21:193a10530741 386 CNFG_ECG_r.bits.rate = 2; // Sample rate = 125 sps
coreyharris 1:86843c27cc81 387 ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all);
coreyharris 1:86843c27cc81 388
coreyharris 1:86843c27cc81 389
coreyharris 1:86843c27cc81 390 //R-to-R configuration
coreyharris 1:86843c27cc81 391 MAX30003::RtoR1Configuration_u CNFG_RTOR_r;
coreyharris 3:420d5efbd967 392 CNFG_RTOR_r.bits.en_rtor = 1; // Enable R-to-R detection
coreyharris 1:86843c27cc81 393 ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all);
coreyharris 1:86843c27cc81 394
coreyharris 1:86843c27cc81 395
coreyharris 1:86843c27cc81 396 //Manage interrupts register setting
coreyharris 1:86843c27cc81 397 MAX30003::ManageInterrupts_u MNG_INT_r;
coreyharris 3:420d5efbd967 398 MNG_INT_r.bits.efit = 0b00011; // Assert EINT w/ 4 unread samples
coreyharris 3:420d5efbd967 399 MNG_INT_r.bits.clr_rrint = 0b01; // Clear R-to-R on RTOR reg. read back
coreyharris 1:86843c27cc81 400 ecgAFE.writeRegister( MAX30003::MNGR_INT , MNG_INT_r.all);
coreyharris 0:38c49bc37c7c 401
coreyharris 0:38c49bc37c7c 402
coreyharris 1:86843c27cc81 403 //Enable interrupts register setting
coreyharris 1:86843c27cc81 404 MAX30003::EnableInterrupts_u EN_INT_r;
coreyharris 5:f8d1f651bef5 405 EN_INT_r.all = 0;
coreyharris 3:420d5efbd967 406 EN_INT_r.bits.en_eint = 1; // Enable EINT interrupt
coreyharris 4:06e258ff0b97 407 EN_INT_r.bits.en_rrint = 0; // Disable R-to-R interrupt
coreyharris 3:420d5efbd967 408 EN_INT_r.bits.intb_type = 3; // Open-drain NMOS with internal pullup
coreyharris 1:86843c27cc81 409 ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all);
coreyharris 1:86843c27cc81 410
coreyharris 1:86843c27cc81 411
coreyharris 1:86843c27cc81 412 //Dyanmic modes config
coreyharris 1:86843c27cc81 413 MAX30003::ManageDynamicModes_u MNG_DYN_r;
coreyharris 3:420d5efbd967 414 MNG_DYN_r.bits.fast = 0; // Fast recovery mode disabled
coreyharris 1:86843c27cc81 415 ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all);
coreyharris 5:f8d1f651bef5 416
coreyharris 5:f8d1f651bef5 417 // MUX Config
coreyharris 5:f8d1f651bef5 418 MAX30003::MuxConfiguration_u CNFG_MUX_r;
coreyharris 5:f8d1f651bef5 419 CNFG_MUX_r.bits.openn = 0; // Connect ECGN to AFE channel
coreyharris 5:f8d1f651bef5 420 CNFG_MUX_r.bits.openp = 0; // Connect ECGP to AFE channel
coreyharris 5:f8d1f651bef5 421 ecgAFE.writeRegister( MAX30003::CNFG_EMUX , CNFG_MUX_r.all);
coreyharris 1:86843c27cc81 422
coreyharris 1:86843c27cc81 423 return;
coreyharris 0:38c49bc37c7c 424 }
coreyharris 0:38c49bc37c7c 425