Parth Sagar / Mbed OS MAX3000_Beta_July_first_demo

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Dependencies:   MAX30003 max32630fthr

main.cpp@20:2e999e6568c1, 2021-06-23 (annotated)

Committer:
kidecha_rahul
Date:
Wed Jun 23 20:32:39 2021 +0000
Revision:
20:2e999e6568c1
Parent:
19:7a084dc2f09d
Child:
21:193a10530741
MUX and channel number

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"
parthsagar2010 9:24ecf16eab0f 5 #include "ds1307.h"
parthsagar2010 11:300afaf2696b 6 //#include <BufferedSerial.h>
parthsagar2010 10:54aa50490b15 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
parthsagar2010 9:24ecf16eab0f 17 Timer timer_fast;
parthsagar2010 10:54aa50490b15 18 Timer t;
coreyharris 0:38c49bc37c7c 19 MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
coreyharris 0:38c49bc37c7c 20
parthsagar2010 9:24ecf16eab0f 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 19:7a084dc2f09d 28
kidecha_rahul 19:7a084dc2f09d 29 DigitalOut S0(P5_6);
kidecha_rahul 19:7a084dc2f09d 30 DigitalOut S1(P5_5);
kidecha_rahul 19:7a084dc2f09d 31 DigitalOut S2(P3_3);
kidecha_rahul 19:7a084dc2f09d 32 DigitalOut S3(P3_2);
kidecha_rahul 19:7a084dc2f09d 33
kidecha_rahul 19:7a084dc2f09d 34
parthsagar2010 16:520034b124b6 35
coreyharris 0:38c49bc37c7c 36 void ecg_config(MAX30003 &ecgAFE);
parthsagar2010 11:300afaf2696b 37 //BufferedSerial pc(P3_1,P3_0); // Use USB debug probe for serial link static Unbuffered
parthsagar2010 15:0356e9454a60 38 static BufferedSerial pc(TARGET_TX_PIN, TARGET_RX_PIN, 230400); // 230400 works well
parthsagar2010 11:300afaf2696b 39
parthsagar2010 10:54aa50490b15 40 //Serial uart_1(USBTX, USBRX); // Use USB debug probe for serial link static Unbuffered
parthsagar2010 10:54aa50490b15 41 //
parthsagar2010 10:54aa50490b15 42 //Serial pc(P3_1,P3_0);
coreyharris 0:38c49bc37c7c 43 volatile bool ecgFIFOIntFlag = 0;
parthsagar2010 9:24ecf16eab0f 44 volatile bool timerflag = 0;
parthsagar2010 11:300afaf2696b 45
parthsagar2010 11:300afaf2696b 46 FileHandle *mbed::mbed_override_console(int fd)
parthsagar2010 11:300afaf2696b 47 {
parthsagar2010 11:300afaf2696b 48 return &pc;
parthsagar2010 11:300afaf2696b 49 }
parthsagar2010 11:300afaf2696b 50
parthsagar2010 8:6b9359f81cc0 51 void ecgFIFO_callback_1() { // Triggered when the ECG FIFO is about to be full
coreyharris 0:38c49bc37c7c 52
coreyharris 0:38c49bc37c7c 53 ecgFIFOIntFlag = 1;
coreyharris 0:38c49bc37c7c 54 }
coreyharris 0:38c49bc37c7c 55
parthsagar2010 12:10b49ad3c492 56 time_t asUnixTime(int year, int mon, int mday, int hour, int min, int sec) {
parthsagar2010 12:10b49ad3c492 57 struct tm t;
parthsagar2010 12:10b49ad3c492 58 t.tm_year = year - 1900;
parthsagar2010 12:10b49ad3c492 59 t.tm_mon = mon - 1; // convert to 0 based month
parthsagar2010 12:10b49ad3c492 60 t.tm_mday = mday;
parthsagar2010 12:10b49ad3c492 61 t.tm_hour = hour;
parthsagar2010 12:10b49ad3c492 62 t.tm_min = min;
parthsagar2010 12:10b49ad3c492 63 t.tm_sec = sec;
parthsagar2010 12:10b49ad3c492 64 t.tm_isdst = -1; // Is Daylight saving time on? 1 = yes, 0 = no, -1 = unknown
parthsagar2010 12:10b49ad3c492 65
parthsagar2010 12:10b49ad3c492 66 return mktime(&t); // returns seconds elapsed since January 1, 1970 (begin of the Epoch)
parthsagar2010 12:10b49ad3c492 67 }
parthsagar2010 11:300afaf2696b 68 int main(void)
coreyharris 3:420d5efbd967 69 {
parthsagar2010 16:520034b124b6 70 int t=0;
kidecha_rahul 19:7a084dc2f09d 71 //
kidecha_rahul 19:7a084dc2f09d 72 // EN=0;
kidecha_rahul 19:7a084dc2f09d 73 // EN=1;
kidecha_rahul 19:7a084dc2f09d 74 // A0=0;
kidecha_rahul 19:7a084dc2f09d 75 // A1=1;
kidecha_rahul 19:7a084dc2f09d 76
kidecha_rahul 19:7a084dc2f09d 77 S0=0;
kidecha_rahul 19:7a084dc2f09d 78 S1=0;
kidecha_rahul 19:7a084dc2f09d 79 S2=0;
kidecha_rahul 19:7a084dc2f09d 80 S3=0;
parthsagar2010 16:520034b124b6 81
parthsagar2010 16:520034b124b6 82
kidecha_rahul 19:7a084dc2f09d 83
parthsagar2010 11:300afaf2696b 84 // Constants
coreyharris 4:06e258ff0b97 85 const int EINT_STATUS_MASK = 1 << 23;
coreyharris 6:86ac850c718d 86 const int FIFO_OVF_MASK = 0x7;
coreyharris 6:86ac850c718d 87 const int FIFO_VALID_SAMPLE_MASK = 0x0;
coreyharris 6:86ac850c718d 88 const int FIFO_FAST_SAMPLE_MASK = 0x1;
coreyharris 6:86ac850c718d 89 const int ETAG_BITS_MASK = 0x7;
kidecha_rahul 17:f0008ebb1040 90
kidecha_rahul 17:f0008ebb1040 91 //-------------------------------------------------------------RTC-------------------------------------------------------------//
kidecha_rahul 17:f0008ebb1040 92 //instantiate rtc object
kidecha_rahul 17:f0008ebb1040 93 Ds3231 rtc(SDA, SCL);
kidecha_rahul 17:f0008ebb1040 94
kidecha_rahul 17:f0008ebb1040 95 uint16_t rtn_val;
kidecha_rahul 17:f0008ebb1040 96
kidecha_rahul 17:f0008ebb1040 97 //time = 12:00:00 AM 12hr mode
kidecha_rahul 20:2e999e6568c1 98 ds3231_time_t time = {50,10,16,1,0}; //seconds, min, hours, am_pm, mode
kidecha_rahul 17:f0008ebb1040 99
kidecha_rahul 17:f0008ebb1040 100
kidecha_rahul 17:f0008ebb1040 101 rtn_val = rtc.set_time(time);
kidecha_rahul 17:f0008ebb1040 102
kidecha_rahul 17:f0008ebb1040 103
kidecha_rahul 17:f0008ebb1040 104 //see datasheet for calendar format
kidecha_rahul 20:2e999e6568c1 105 ds3231_calendar_t calendar = {4,23,6,21}; //day date month year
kidecha_rahul 17:f0008ebb1040 106
kidecha_rahul 17:f0008ebb1040 107
kidecha_rahul 17:f0008ebb1040 108 rtn_val = rtc.set_calendar(calendar);
kidecha_rahul 17:f0008ebb1040 109
kidecha_rahul 17:f0008ebb1040 110
kidecha_rahul 17:f0008ebb1040 111 //see datasheet for calendar format
kidecha_rahul 17:f0008ebb1040 112
kidecha_rahul 17:f0008ebb1040 113 ds3231_cntl_stat_t data = {0x1C, 0x08};
kidecha_rahul 17:f0008ebb1040 114
kidecha_rahul 17:f0008ebb1040 115 rtn_val = rtc.set_cntl_stat_reg(data);
kidecha_rahul 17:f0008ebb1040 116 //------------------------------------------------------------------------------------------------------------------------------//
kidecha_rahul 17:f0008ebb1040 117
kidecha_rahul 17:f0008ebb1040 118
parthsagar2010 9:24ecf16eab0f 119 timer_fast.start();
parthsagar2010 15:0356e9454a60 120 DigitalOut rLed(LED2, LED_ON);
parthsagar2010 10:54aa50490b15 121 // pc.baud(9600);
coreyharris 3:420d5efbd967 122
parthsagar2010 11:300afaf2696b 123 //pc.set_baud(115200); // Baud rate = 115200
parthsagar2010 11:300afaf2696b 124 //pc.set_format(
parthsagar2010 11:300afaf2696b 125 // /* bits */ 8,
parthsagar2010 11:300afaf2696b 126 // /* parity */ BufferedSerial::None,
parthsagar2010 11:300afaf2696b 127 // /* stop bit */ 1 //1
parthsagar2010 11:300afaf2696b 128 //);
parthsagar2010 10:54aa50490b15 129 //uart_1.baud(115200);
coreyharris 1:86843c27cc81 130 InterruptIn ecgFIFO_int(P5_4); // Config P5_4 as int. in for the
parthsagar2010 8:6b9359f81cc0 131 ecgFIFO_int.fall(&ecgFIFO_callback_1); // ecg FIFO interrupt at falling edge
coreyharris 0:38c49bc37c7c 132
coreyharris 1:86843c27cc81 133 SPI spiBus(SPI2_MOSI, SPI2_MISO, SPI2_SCK); // SPI bus, P5_1 = MOSI,
coreyharris 1:86843c27cc81 134 // P5_2 = MISO, P5_0 = SCK
parthsagar2010 10:54aa50490b15 135
coreyharris 4:06e258ff0b97 136 MAX30003 ecgAFE(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3
parthsagar2010 8:6b9359f81cc0 137
coreyharris 4:06e258ff0b97 138 ecg_config(ecgAFE); // Config ECG
parthsagar2010 12:10b49ad3c492 139
coreyharris 0:38c49bc37c7c 140
coreyharris 4:06e258ff0b97 141 ecgAFE.writeRegister( MAX30003::SYNCH , 0);
coreyharris 0:38c49bc37c7c 142
coreyharris 4:06e258ff0b97 143 uint32_t ecgFIFO, readECGSamples, idx, ETAG[32], status;
coreyharris 1:86843c27cc81 144 int16_t ecgSample[32];
parthsagar2010 9:24ecf16eab0f 145 //bool timerflag = false;
parthsagar2010 10:54aa50490b15 146 int16_t ecgSample_1sec[200];
parthsagar2010 10:54aa50490b15 147 uint8_t ecg_1 = 0;
parthsagar2010 10:54aa50490b15 148 uint8_t ecg_2 = 0;
parthsagar2010 10:54aa50490b15 149 uint16_t onesec_counter = 0;
parthsagar2010 10:54aa50490b15 150 uint16_t onesec_counter_temp = 0;
parthsagar2010 10:54aa50490b15 151
parthsagar2010 9:24ecf16eab0f 152 int16_t sample = 300;
parthsagar2010 10:54aa50490b15 153 uint8_t final[10];
parthsagar2010 12:10b49ad3c492 154
parthsagar2010 10:54aa50490b15 155 uint16_t checksum_ = 0;
parthsagar2010 10:54aa50490b15 156 uint16_t mod_checksum = 0;
parthsagar2010 10:54aa50490b15 157
parthsagar2010 10:54aa50490b15 158 uint8_t p_1 = 0;
parthsagar2010 10:54aa50490b15 159 uint8_t p_2 = 0;
parthsagar2010 10:54aa50490b15 160 uint8_t p_3 = 0;
parthsagar2010 10:54aa50490b15 161 uint8_t p_4 = 0;
kidecha_rahul 18:101042d225ef 162 // uint8_t channel_num= 1;
kidecha_rahul 20:2e999e6568c1 163 uint8_t channel_num[1]= {0};
parthsagar2010 10:54aa50490b15 164 uint8_t data_len_1 = 0;
parthsagar2010 10:54aa50490b15 165 uint8_t data_len_2 = 0;
parthsagar2010 12:10b49ad3c492 166 uint32_t packet_1 = 0;
parthsagar2010 10:54aa50490b15 167 uint8_t cksm_1 = 0;
parthsagar2010 10:54aa50490b15 168 uint8_t cksm_2 = 0;
parthsagar2010 10:54aa50490b15 169 uint8_t header_device_id[3] = {0,0,210};
kidecha_rahul 19:7a084dc2f09d 170 // uint8_t header_device_id[3] = {0,0,1}; //for rahul
parthsagar2010 10:54aa50490b15 171 uint8_t header_packet_type[2] = {0,2};
parthsagar2010 10:54aa50490b15 172
parthsagar2010 10:54aa50490b15 173 uint8_t ending[5] = {'@','#','%','!','7'};
parthsagar2010 10:54aa50490b15 174
parthsagar2010 15:0356e9454a60 175 bool flip = true;
parthsagar2010 15:0356e9454a60 176 int sampleps = 0;
parthsagar2010 15:0356e9454a60 177
parthsagar2010 16:520034b124b6 178 char buf[20];//={"1622326341"};
parthsagar2010 15:0356e9454a60 179 // pc.write("Welcome",8*sizeof(char));
parthsagar2010 15:0356e9454a60 180 // printf("In the main loop"); //printf("In the main loop");
parthsagar2010 11:300afaf2696b 181 bool flag_first = false;
parthsagar2010 15:0356e9454a60 182 bool timestamp_reader = false;
kidecha_rahul 17:f0008ebb1040 183
kidecha_rahul 17:f0008ebb1040 184
kidecha_rahul 19:7a084dc2f09d 185 //---------------------------------hardware RTC check---------------------------------------------//
kidecha_rahul 17:f0008ebb1040 186 time_t epoch_time;
kidecha_rahul 17:f0008ebb1040 187
kidecha_rahul 17:f0008ebb1040 188 do {
kidecha_rahul 17:f0008ebb1040 189 rtc.get_time(&time);
kidecha_rahul 17:f0008ebb1040 190 rtc.get_calendar(&calendar);
kidecha_rahul 17:f0008ebb1040 191 epoch_time = rtc.get_epoch();
kidecha_rahul 17:f0008ebb1040 192 //printf("seconds since the Epoch: %ld\n", epoch_time);
parthsagar2010 12:10b49ad3c492 193
kidecha_rahul 17:f0008ebb1040 194 packet_1 = epoch_time;
kidecha_rahul 17:f0008ebb1040 195 }while((epoch_time % 60)!=0); // come out at the start of minute
kidecha_rahul 19:7a084dc2f09d 196
kidecha_rahul 19:7a084dc2f09d 197
kidecha_rahul 17:f0008ebb1040 198
parthsagar2010 16:520034b124b6 199 while(1)
parthsagar2010 9:24ecf16eab0f 200 {
kidecha_rahul 19:7a084dc2f09d 201
parthsagar2010 15:0356e9454a60 202 if ((onesec_counter>=125))
kidecha_rahul 19:7a084dc2f09d 203 { t++;
parthsagar2010 11:300afaf2696b 204 //t.start();
parthsagar2010 10:54aa50490b15 205 //ledA = !ledA;
kidecha_rahul 18:101042d225ef 206 pc.write((uint8_t *)header_device_id, sizeof(header_device_id)); // device ID
parthsagar2010 10:54aa50490b15 207
kidecha_rahul 18:101042d225ef 208 pc.write((uint8_t *)header_packet_type, sizeof(header_packet_type)); // packet type
kidecha_rahul 18:101042d225ef 209
kidecha_rahul 17:f0008ebb1040 210 epoch_time = rtc.get_epoch();
kidecha_rahul 17:f0008ebb1040 211 //time_t seconds = time(NULL); // if remove it the timestamp will be static
kidecha_rahul 17:f0008ebb1040 212 packet_1 = epoch_time; //
parthsagar2010 12:10b49ad3c492 213 //packet_1 ++;
parthsagar2010 15:0356e9454a60 214 // printf("Time as seconds since January 1, 1970 = %d\n", packet_1);
parthsagar2010 10:54aa50490b15 215 p_1 = packet_1 & 0xff;
parthsagar2010 10:54aa50490b15 216 p_2 = (packet_1 >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 217 p_3 = (packet_1 >> 16) & 0xff;
parthsagar2010 10:54aa50490b15 218 p_4 = (packet_1 >> 24) & 0xff;
parthsagar2010 10:54aa50490b15 219 // checksum_ = checksum_ + (packet_1 & 0xffff) + ((packet_1 >> 16) & 0xffff) ;
parthsagar2010 10:54aa50490b15 220 checksum_ = checksum_ + p_1 + p_2 + p_3 + p_4 ;
parthsagar2010 10:54aa50490b15 221 uint8_t header_packet_id[4] = {p_4,p_3,p_2,p_1};
kidecha_rahul 18:101042d225ef 222 pc.write((uint8_t *)header_packet_id, sizeof(header_packet_id)); // packet ID
kidecha_rahul 18:101042d225ef 223
kidecha_rahul 18:101042d225ef 224
parthsagar2010 16:520034b124b6 225 pc.write((uint8_t *)channel_num, sizeof(channel_num));
kidecha_rahul 18:101042d225ef 226
parthsagar2010 10:54aa50490b15 227 onesec_counter_temp = onesec_counter * 2;
parthsagar2010 10:54aa50490b15 228 data_len_1 = onesec_counter_temp & 0xff;
parthsagar2010 10:54aa50490b15 229 data_len_2 = (onesec_counter_temp >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 230 checksum_ = checksum_ + data_len_1 + data_len_2;
parthsagar2010 10:54aa50490b15 231 //pc.write((uint32_t *)packet_1, sizeof(packet_1));
parthsagar2010 10:54aa50490b15 232 uint8_t header_ecg_datalen[2] = {data_len_2,data_len_1};
parthsagar2010 10:54aa50490b15 233 pc.write((uint8_t *)header_ecg_datalen, sizeof(header_ecg_datalen));
kidecha_rahul 18:101042d225ef 234
parthsagar2010 10:54aa50490b15 235 mod_checksum = checksum_ % 65536 ;
parthsagar2010 10:54aa50490b15 236 cksm_1 = mod_checksum & 0xff;
parthsagar2010 10:54aa50490b15 237 cksm_2 = (mod_checksum >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 238 uint8_t header_ecg_checksum[2] = {cksm_2,cksm_1};
parthsagar2010 10:54aa50490b15 239 pc.write((uint8_t *)header_ecg_checksum, sizeof(header_ecg_checksum));
parthsagar2010 10:54aa50490b15 240
parthsagar2010 10:54aa50490b15 241 pc.write((int16_t *)ecgSample_1sec,onesec_counter * sizeof(int16_t));
parthsagar2010 15:0356e9454a60 242 // printf("Samples per second %d \n", (onesec_counter));
parthsagar2010 10:54aa50490b15 243 onesec_counter = 0;
parthsagar2010 10:54aa50490b15 244 // memset(ecgSample_1sec, 0, sizeof(ecgSample_1sec));
parthsagar2010 10:54aa50490b15 245
parthsagar2010 10:54aa50490b15 246 pc.write((uint8_t *)ending, sizeof(ending));
parthsagar2010 10:54aa50490b15 247 checksum_ = 0;
parthsagar2010 15:0356e9454a60 248 //t.stop();
parthsagar2010 11:300afaf2696b 249 // auto us = t.elapsed_time().count();
parthsagar2010 15:0356e9454a60 250 // float time_taken = us/1000000;
parthsagar2010 15:0356e9454a60 251 // printf("Timer time: %lu ms \n", (time_taken*100));
parthsagar2010 15:0356e9454a60 252 // t.reset();
parthsagar2010 15:0356e9454a60 253 // timer_fast.reset();
kidecha_rahul 19:7a084dc2f09d 254
kidecha_rahul 19:7a084dc2f09d 255 if (t==10) //C1
kidecha_rahul 19:7a084dc2f09d 256 {
kidecha_rahul 19:7a084dc2f09d 257 S0=1;
kidecha_rahul 19:7a084dc2f09d 258 S1=0;
kidecha_rahul 19:7a084dc2f09d 259 S2=0;
kidecha_rahul 19:7a084dc2f09d 260 S3=0;
kidecha_rahul 20:2e999e6568c1 261 channel_num[0]= {1};
kidecha_rahul 19:7a084dc2f09d 262 }
kidecha_rahul 19:7a084dc2f09d 263 if (t==20) //C2
kidecha_rahul 19:7a084dc2f09d 264 {
kidecha_rahul 19:7a084dc2f09d 265 S0=0;
kidecha_rahul 19:7a084dc2f09d 266 S1=1;
kidecha_rahul 19:7a084dc2f09d 267 S2=0;
kidecha_rahul 19:7a084dc2f09d 268 S3=0;
kidecha_rahul 20:2e999e6568c1 269 channel_num[0]= {2};
kidecha_rahul 19:7a084dc2f09d 270 }
kidecha_rahul 19:7a084dc2f09d 271
kidecha_rahul 19:7a084dc2f09d 272 if (t==30) // C0
kidecha_rahul 19:7a084dc2f09d 273 {
kidecha_rahul 19:7a084dc2f09d 274 S0=0;
kidecha_rahul 19:7a084dc2f09d 275 S1=0;
kidecha_rahul 19:7a084dc2f09d 276 S2=0;
kidecha_rahul 19:7a084dc2f09d 277 S3=0;
kidecha_rahul 20:2e999e6568c1 278 channel_num[0]= {0};
kidecha_rahul 19:7a084dc2f09d 279 t=0;}
kidecha_rahul 19:7a084dc2f09d 280
kidecha_rahul 19:7a084dc2f09d 281
kidecha_rahul 19:7a084dc2f09d 282
kidecha_rahul 19:7a084dc2f09d 283
parthsagar2010 9:24ecf16eab0f 284 }
coreyharris 4:06e258ff0b97 285 // Read back ECG samples from the FIFO
kidecha_rahul 20:2e999e6568c1 286 else if(ecgFIFOIntFlag==1)// && (timerflag == 0))
parthsagar2010 9:24ecf16eab0f 287 {
coreyharris 2:812d40f1853d 288
coreyharris 5:f8d1f651bef5 289 ecgFIFOIntFlag = 0;
coreyharris 4:06e258ff0b97 290 status = ecgAFE.readRegister( MAX30003::STATUS ); // Read the STATUS register
coreyharris 2:812d40f1853d 291
coreyharris 3:420d5efbd967 292 // Check if EINT interrupt asserted
parthsagar2010 9:24ecf16eab0f 293 if ( ( status & EINT_STATUS_MASK ) == EINT_STATUS_MASK )
parthsagar2010 9:24ecf16eab0f 294 {
coreyharris 3:420d5efbd967 295
coreyharris 4:06e258ff0b97 296 readECGSamples = 0; // Reset sample counter
coreyharris 3:420d5efbd967 297
coreyharris 2:812d40f1853d 298 do {
coreyharris 6:86ac850c718d 299 ecgFIFO = ecgAFE.readRegister( MAX30003::ECG_FIFO ); // Read FIFO
coreyharris 4:06e258ff0b97 300 ecgSample[readECGSamples] = ecgFIFO >> 8; // Isolate voltage data
parthsagar2010 10:54aa50490b15 301 ecgSample[readECGSamples] = ((ecgSample[readECGSamples]<<8)&0xFF00)|((ecgSample[readECGSamples]>>8)&0x00FF);
coreyharris 6:86ac850c718d 302 ETAG[readECGSamples] = ( ecgFIFO >> 3 ) & ETAG_BITS_MASK; // Isolate ETAG
coreyharris 4:06e258ff0b97 303 readECGSamples++; // Increment sample counter
coreyharris 3:420d5efbd967 304
coreyharris 3:420d5efbd967 305 // Check that sample is not last sample in FIFO
coreyharris 6:86ac850c718d 306 } while ( ETAG[readECGSamples-1] == FIFO_VALID_SAMPLE_MASK ||
coreyharris 6:86ac850c718d 307 ETAG[readECGSamples-1] == FIFO_FAST_SAMPLE_MASK );
coreyharris 2:812d40f1853d 308
coreyharris 3:420d5efbd967 309 // Check if FIFO has overflowed
parthsagar2010 9:24ecf16eab0f 310 if( ETAG[readECGSamples - 1] == FIFO_OVF_MASK )
parthsagar2010 9:24ecf16eab0f 311 {
coreyharris 3:420d5efbd967 312 ecgAFE.writeRegister( MAX30003::FIFO_RST , 0); // Reset FIFO
johnGreeneMaxim 7:cf0855a0450a 313 rLed = 1;//notifies the user that an over flow occured
coreyharris 3:420d5efbd967 314 }
parthsagar2010 10:54aa50490b15 315 //uint8_t header_ecg_checksum[2] = {'%','%'};
parthsagar2010 10:54aa50490b15 316 //pc.write((uint8_t *)header_ecg_checksum, sizeof(header_ecg_checksum));
coreyharris 3:420d5efbd967 317
parthsagar2010 10:54aa50490b15 318 //pc.write((int16_t *)ecgSample,readECGSamples * sizeof(int16_t ));
parthsagar2010 10:54aa50490b15 319 //memcpy(ecgSample_1sec , ecgSample, sizeof(ecgSample));
parthsagar2010 10:54aa50490b15 320
parthsagar2010 10:54aa50490b15 321 //memcpy(ecgSample_1sec + (onesec_counter * sizeof(int16_t)), ecgSample, sizeof(ecgSample));
parthsagar2010 15:0356e9454a60 322
parthsagar2010 15:0356e9454a60 323 if (flip)
parthsagar2010 15:0356e9454a60 324 {
parthsagar2010 15:0356e9454a60 325 sampleps = 12;
parthsagar2010 15:0356e9454a60 326 //printf("Flipped 12\r\n");
parthsagar2010 15:0356e9454a60 327 }
parthsagar2010 15:0356e9454a60 328 else
parthsagar2010 15:0356e9454a60 329 {
parthsagar2010 15:0356e9454a60 330 sampleps = 13;
parthsagar2010 15:0356e9454a60 331 // printf("Flipped 13\r\n");
parthsagar2010 15:0356e9454a60 332 }
parthsagar2010 15:0356e9454a60 333
parthsagar2010 15:0356e9454a60 334 for( idx = 0; idx < sampleps; idx++ )
parthsagar2010 9:24ecf16eab0f 335 {
parthsagar2010 9:24ecf16eab0f 336 //pc.printf("%6d\r\n", ecgSample[idx]);
parthsagar2010 9:24ecf16eab0f 337 ecgSample_1sec[onesec_counter] = ecgSample[idx];
parthsagar2010 10:54aa50490b15 338
parthsagar2010 10:54aa50490b15 339 cksm_1 = ecgSample[idx] & 0xff;
parthsagar2010 10:54aa50490b15 340 cksm_2 = (ecgSample[idx] >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 341 checksum_ += cksm_1 + cksm_2;
parthsagar2010 9:24ecf16eab0f 342 onesec_counter++;
coreyharris 6:86ac850c718d 343 }
parthsagar2010 15:0356e9454a60 344 flip =!flip;
parthsagar2010 15:0356e9454a60 345 rLed = ! rLed;
coreyharris 0:38c49bc37c7c 346 }
parthsagar2010 10:54aa50490b15 347
coreyharris 0:38c49bc37c7c 348 }
coreyharris 0:38c49bc37c7c 349 }
coreyharris 0:38c49bc37c7c 350 }
coreyharris 0:38c49bc37c7c 351
coreyharris 0:38c49bc37c7c 352
coreyharris 0:38c49bc37c7c 353
coreyharris 0:38c49bc37c7c 354
coreyharris 0:38c49bc37c7c 355 void ecg_config(MAX30003& ecgAFE) {
coreyharris 0:38c49bc37c7c 356
coreyharris 1:86843c27cc81 357 // Reset ECG to clear registers
coreyharris 1:86843c27cc81 358 ecgAFE.writeRegister( MAX30003::SW_RST , 0);
coreyharris 0:38c49bc37c7c 359
coreyharris 1:86843c27cc81 360 // General config register setting
coreyharris 1:86843c27cc81 361 MAX30003::GeneralConfiguration_u CNFG_GEN_r;
coreyharris 3:420d5efbd967 362 CNFG_GEN_r.bits.en_ecg = 1; // Enable ECG channel
coreyharris 3:420d5efbd967 363 CNFG_GEN_r.bits.rbiasn = 1; // Enable resistive bias on negative input
coreyharris 3:420d5efbd967 364 CNFG_GEN_r.bits.rbiasp = 1; // Enable resistive bias on positive input
coreyharris 3:420d5efbd967 365 CNFG_GEN_r.bits.en_rbias = 1; // Enable resistive bias
coreyharris 3:420d5efbd967 366 CNFG_GEN_r.bits.imag = 2; // Current magnitude = 10nA
coreyharris 3:420d5efbd967 367 CNFG_GEN_r.bits.en_dcloff = 1; // Enable DC lead-off detection
parthsagar2010 12:10b49ad3c492 368 //CNFG_GEN_r.bits.fmstr = 1; //125 sps FMSTR 1
coreyharris 1:86843c27cc81 369 ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all);
coreyharris 1:86843c27cc81 370
coreyharris 1:86843c27cc81 371
coreyharris 1:86843c27cc81 372 // ECG Config register setting
coreyharris 1:86843c27cc81 373 MAX30003::ECGConfiguration_u CNFG_ECG_r;
coreyharris 3:420d5efbd967 374 CNFG_ECG_r.bits.dlpf = 1; // Digital LPF cutoff = 40Hz
coreyharris 3:420d5efbd967 375 CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz
coreyharris 3:420d5efbd967 376 CNFG_ECG_r.bits.gain = 3; // ECG gain = 160V/V
coreyharris 3:420d5efbd967 377 CNFG_ECG_r.bits.rate = 2; // Sample rate = 128 sps
coreyharris 1:86843c27cc81 378 ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all);
coreyharris 1:86843c27cc81 379
coreyharris 1:86843c27cc81 380
coreyharris 1:86843c27cc81 381 //R-to-R configuration
coreyharris 1:86843c27cc81 382 MAX30003::RtoR1Configuration_u CNFG_RTOR_r;
coreyharris 3:420d5efbd967 383 CNFG_RTOR_r.bits.en_rtor = 1; // Enable R-to-R detection
coreyharris 1:86843c27cc81 384 ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all);
coreyharris 1:86843c27cc81 385
coreyharris 1:86843c27cc81 386
coreyharris 1:86843c27cc81 387 //Manage interrupts register setting
coreyharris 1:86843c27cc81 388 MAX30003::ManageInterrupts_u MNG_INT_r;
coreyharris 3:420d5efbd967 389 MNG_INT_r.bits.efit = 0b00011; // Assert EINT w/ 4 unread samples
coreyharris 3:420d5efbd967 390 MNG_INT_r.bits.clr_rrint = 0b01; // Clear R-to-R on RTOR reg. read back
coreyharris 1:86843c27cc81 391 ecgAFE.writeRegister( MAX30003::MNGR_INT , MNG_INT_r.all);
coreyharris 0:38c49bc37c7c 392
coreyharris 0:38c49bc37c7c 393
coreyharris 1:86843c27cc81 394 //Enable interrupts register setting
coreyharris 1:86843c27cc81 395 MAX30003::EnableInterrupts_u EN_INT_r;
coreyharris 5:f8d1f651bef5 396 EN_INT_r.all = 0;
coreyharris 3:420d5efbd967 397 EN_INT_r.bits.en_eint = 1; // Enable EINT interrupt
coreyharris 4:06e258ff0b97 398 EN_INT_r.bits.en_rrint = 0; // Disable R-to-R interrupt
coreyharris 3:420d5efbd967 399 EN_INT_r.bits.intb_type = 3; // Open-drain NMOS with internal pullup
coreyharris 1:86843c27cc81 400 ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all);
coreyharris 1:86843c27cc81 401
coreyharris 1:86843c27cc81 402
coreyharris 1:86843c27cc81 403 //Dyanmic modes config
coreyharris 1:86843c27cc81 404 MAX30003::ManageDynamicModes_u MNG_DYN_r;
coreyharris 3:420d5efbd967 405 MNG_DYN_r.bits.fast = 0; // Fast recovery mode disabled
coreyharris 1:86843c27cc81 406 ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all);
coreyharris 5:f8d1f651bef5 407
coreyharris 5:f8d1f651bef5 408 // MUX Config
coreyharris 5:f8d1f651bef5 409 MAX30003::MuxConfiguration_u CNFG_MUX_r;
coreyharris 5:f8d1f651bef5 410 CNFG_MUX_r.bits.openn = 0; // Connect ECGN to AFE channel
coreyharris 5:f8d1f651bef5 411 CNFG_MUX_r.bits.openp = 0; // Connect ECGP to AFE channel
coreyharris 5:f8d1f651bef5 412 ecgAFE.writeRegister( MAX30003::CNFG_EMUX , CNFG_MUX_r.all);
coreyharris 1:86843c27cc81 413
coreyharris 1:86843c27cc81 414 return;
coreyharris 0:38c49bc37c7c 415 }
coreyharris 0:38c49bc37c7c 416