Parth Sagar / Mbed OS MAX3000_Beta_July_first_demo

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Dependencies:   MAX30003 max32630fthr

main.cpp@18:101042d225ef, 2021-06-11 (annotated)

Committer:
kidecha_rahul
Date:
Fri Jun 11 23:20:20 2021 +0000
Revision:
18:101042d225ef
Parent:
17:f0008ebb1040
Child:
19:7a084dc2f09d
working with RTC

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
parthsagar2010 16:520034b124b6 24 DigitalOut EN(P1_7);
parthsagar2010 16:520034b124b6 25 DigitalOut A0(P1_4);
parthsagar2010 16:520034b124b6 26 DigitalOut A1(P7_2);
parthsagar2010 16:520034b124b6 27
coreyharris 0:38c49bc37c7c 28 void ecg_config(MAX30003 &ecgAFE);
parthsagar2010 11:300afaf2696b 29 //BufferedSerial pc(P3_1,P3_0); // Use USB debug probe for serial link static Unbuffered
parthsagar2010 15:0356e9454a60 30 static BufferedSerial pc(TARGET_TX_PIN, TARGET_RX_PIN, 230400); // 230400 works well
parthsagar2010 11:300afaf2696b 31
parthsagar2010 10:54aa50490b15 32 //Serial uart_1(USBTX, USBRX); // Use USB debug probe for serial link static Unbuffered
parthsagar2010 10:54aa50490b15 33 //
parthsagar2010 10:54aa50490b15 34 //Serial pc(P3_1,P3_0);
coreyharris 0:38c49bc37c7c 35 volatile bool ecgFIFOIntFlag = 0;
parthsagar2010 9:24ecf16eab0f 36 volatile bool timerflag = 0;
parthsagar2010 11:300afaf2696b 37
parthsagar2010 11:300afaf2696b 38 FileHandle *mbed::mbed_override_console(int fd)
parthsagar2010 11:300afaf2696b 39 {
parthsagar2010 11:300afaf2696b 40 return &pc;
parthsagar2010 11:300afaf2696b 41 }
parthsagar2010 11:300afaf2696b 42
parthsagar2010 8:6b9359f81cc0 43 void ecgFIFO_callback_1() { // Triggered when the ECG FIFO is about to be full
coreyharris 0:38c49bc37c7c 44
coreyharris 0:38c49bc37c7c 45 ecgFIFOIntFlag = 1;
coreyharris 0:38c49bc37c7c 46 }
coreyharris 0:38c49bc37c7c 47
parthsagar2010 12:10b49ad3c492 48 time_t asUnixTime(int year, int mon, int mday, int hour, int min, int sec) {
parthsagar2010 12:10b49ad3c492 49 struct tm t;
parthsagar2010 12:10b49ad3c492 50 t.tm_year = year - 1900;
parthsagar2010 12:10b49ad3c492 51 t.tm_mon = mon - 1; // convert to 0 based month
parthsagar2010 12:10b49ad3c492 52 t.tm_mday = mday;
parthsagar2010 12:10b49ad3c492 53 t.tm_hour = hour;
parthsagar2010 12:10b49ad3c492 54 t.tm_min = min;
parthsagar2010 12:10b49ad3c492 55 t.tm_sec = sec;
parthsagar2010 12:10b49ad3c492 56 t.tm_isdst = -1; // Is Daylight saving time on? 1 = yes, 0 = no, -1 = unknown
parthsagar2010 12:10b49ad3c492 57
parthsagar2010 12:10b49ad3c492 58 return mktime(&t); // returns seconds elapsed since January 1, 1970 (begin of the Epoch)
parthsagar2010 12:10b49ad3c492 59 }
parthsagar2010 11:300afaf2696b 60 int main(void)
coreyharris 3:420d5efbd967 61 {
parthsagar2010 16:520034b124b6 62 int t=0;
parthsagar2010 16:520034b124b6 63
parthsagar2010 16:520034b124b6 64 EN=0;
parthsagar2010 16:520034b124b6 65 EN=1;
parthsagar2010 16:520034b124b6 66 A0=0;
parthsagar2010 16:520034b124b6 67 A1=1;
parthsagar2010 16:520034b124b6 68
parthsagar2010 16:520034b124b6 69
parthsagar2010 16:520034b124b6 70
parthsagar2010 11:300afaf2696b 71 // Constants
coreyharris 4:06e258ff0b97 72 const int EINT_STATUS_MASK = 1 << 23;
coreyharris 6:86ac850c718d 73 const int FIFO_OVF_MASK = 0x7;
coreyharris 6:86ac850c718d 74 const int FIFO_VALID_SAMPLE_MASK = 0x0;
coreyharris 6:86ac850c718d 75 const int FIFO_FAST_SAMPLE_MASK = 0x1;
coreyharris 6:86ac850c718d 76 const int ETAG_BITS_MASK = 0x7;
kidecha_rahul 17:f0008ebb1040 77
kidecha_rahul 17:f0008ebb1040 78 //-------------------------------------------------------------RTC-------------------------------------------------------------//
kidecha_rahul 17:f0008ebb1040 79 //instantiate rtc object
kidecha_rahul 17:f0008ebb1040 80 Ds3231 rtc(SDA, SCL);
kidecha_rahul 17:f0008ebb1040 81
kidecha_rahul 17:f0008ebb1040 82 uint16_t rtn_val;
kidecha_rahul 17:f0008ebb1040 83
kidecha_rahul 17:f0008ebb1040 84 //time = 12:00:00 AM 12hr mode
kidecha_rahul 18:101042d225ef 85 ds3231_time_t time = {25,20,9,1, 0}; // seconds, min, hours, am_pm, mode
kidecha_rahul 17:f0008ebb1040 86
kidecha_rahul 17:f0008ebb1040 87
kidecha_rahul 17:f0008ebb1040 88 rtn_val = rtc.set_time(time);
kidecha_rahul 17:f0008ebb1040 89
kidecha_rahul 17:f0008ebb1040 90
kidecha_rahul 17:f0008ebb1040 91 //see datasheet for calendar format
kidecha_rahul 18:101042d225ef 92 ds3231_calendar_t calendar = {6, 11, 6, 21}; // day date month year
kidecha_rahul 17:f0008ebb1040 93
kidecha_rahul 17:f0008ebb1040 94
kidecha_rahul 17:f0008ebb1040 95 rtn_val = rtc.set_calendar(calendar);
kidecha_rahul 17:f0008ebb1040 96
kidecha_rahul 17:f0008ebb1040 97
kidecha_rahul 17:f0008ebb1040 98 //see datasheet for calendar format
kidecha_rahul 17:f0008ebb1040 99
kidecha_rahul 17:f0008ebb1040 100 ds3231_cntl_stat_t data = {0x1C, 0x08};
kidecha_rahul 17:f0008ebb1040 101
kidecha_rahul 17:f0008ebb1040 102 rtn_val = rtc.set_cntl_stat_reg(data);
kidecha_rahul 17:f0008ebb1040 103 //------------------------------------------------------------------------------------------------------------------------------//
kidecha_rahul 17:f0008ebb1040 104
kidecha_rahul 17:f0008ebb1040 105
parthsagar2010 9:24ecf16eab0f 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;
parthsagar2010 10:54aa50490b15 133 int16_t ecgSample_1sec[200];
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
parthsagar2010 9:24ecf16eab0f 139 int16_t sample = 300;
parthsagar2010 10:54aa50490b15 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;
parthsagar2010 16:520034b124b6 150 uint8_t channel_num[1]= {1};
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};
parthsagar2010 10:54aa50490b15 157 uint8_t header_packet_type[2] = {0,2};
parthsagar2010 10:54aa50490b15 158
parthsagar2010 10:54aa50490b15 159 uint8_t ending[5] = {'@','#','%','!','7'};
parthsagar2010 10:54aa50490b15 160
parthsagar2010 15:0356e9454a60 161 bool flip = true;
parthsagar2010 15:0356e9454a60 162 int sampleps = 0;
parthsagar2010 15:0356e9454a60 163
parthsagar2010 16:520034b124b6 164 char buf[20];//={"1622326341"};
parthsagar2010 15:0356e9454a60 165 // pc.write("Welcome",8*sizeof(char));
parthsagar2010 15:0356e9454a60 166 // printf("In the main loop"); //printf("In the main loop");
parthsagar2010 11:300afaf2696b 167 bool flag_first = false;
parthsagar2010 15:0356e9454a60 168 bool timestamp_reader = false;
kidecha_rahul 17:f0008ebb1040 169
kidecha_rahul 17:f0008ebb1040 170
kidecha_rahul 17:f0008ebb1040 171 time_t epoch_time;
kidecha_rahul 17:f0008ebb1040 172
kidecha_rahul 17:f0008ebb1040 173 do {
kidecha_rahul 17:f0008ebb1040 174 rtc.get_time(&time);
kidecha_rahul 17:f0008ebb1040 175 rtc.get_calendar(&calendar);
kidecha_rahul 17:f0008ebb1040 176 epoch_time = rtc.get_epoch();
kidecha_rahul 17:f0008ebb1040 177 //printf("seconds since the Epoch: %ld\n", epoch_time);
parthsagar2010 12:10b49ad3c492 178
kidecha_rahul 17:f0008ebb1040 179 packet_1 = epoch_time;
kidecha_rahul 17:f0008ebb1040 180 }while((epoch_time % 60)!=0); // come out at the start of minute
kidecha_rahul 17:f0008ebb1040 181
kidecha_rahul 17:f0008ebb1040 182
parthsagar2010 16:520034b124b6 183 while(1)
parthsagar2010 9:24ecf16eab0f 184 {
parthsagar2010 10:54aa50490b15 185
parthsagar2010 9:24ecf16eab0f 186
parthsagar2010 15:0356e9454a60 187 if ((onesec_counter>=125))
parthsagar2010 9:24ecf16eab0f 188 {
parthsagar2010 11:300afaf2696b 189 //t.start();
parthsagar2010 10:54aa50490b15 190 //ledA = !ledA;
kidecha_rahul 18:101042d225ef 191 pc.write((uint8_t *)header_device_id, sizeof(header_device_id)); // device ID
parthsagar2010 10:54aa50490b15 192
kidecha_rahul 18:101042d225ef 193 pc.write((uint8_t *)header_packet_type, sizeof(header_packet_type)); // packet type
kidecha_rahul 18:101042d225ef 194
kidecha_rahul 17:f0008ebb1040 195 epoch_time = rtc.get_epoch();
kidecha_rahul 17:f0008ebb1040 196 //time_t seconds = time(NULL); // if remove it the timestamp will be static
kidecha_rahul 17:f0008ebb1040 197 packet_1 = epoch_time; //
parthsagar2010 12:10b49ad3c492 198 //packet_1 ++;
parthsagar2010 15:0356e9454a60 199 // printf("Time as seconds since January 1, 1970 = %d\n", packet_1);
parthsagar2010 10:54aa50490b15 200 p_1 = packet_1 & 0xff;
parthsagar2010 10:54aa50490b15 201 p_2 = (packet_1 >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 202 p_3 = (packet_1 >> 16) & 0xff;
parthsagar2010 10:54aa50490b15 203 p_4 = (packet_1 >> 24) & 0xff;
parthsagar2010 10:54aa50490b15 204 // checksum_ = checksum_ + (packet_1 & 0xffff) + ((packet_1 >> 16) & 0xffff) ;
parthsagar2010 10:54aa50490b15 205 checksum_ = checksum_ + p_1 + p_2 + p_3 + p_4 ;
parthsagar2010 10:54aa50490b15 206 uint8_t header_packet_id[4] = {p_4,p_3,p_2,p_1};
kidecha_rahul 18:101042d225ef 207 pc.write((uint8_t *)header_packet_id, sizeof(header_packet_id)); // packet ID
kidecha_rahul 18:101042d225ef 208
kidecha_rahul 18:101042d225ef 209
parthsagar2010 16:520034b124b6 210 pc.write((uint8_t *)channel_num, sizeof(channel_num));
kidecha_rahul 18:101042d225ef 211
parthsagar2010 10:54aa50490b15 212 onesec_counter_temp = onesec_counter * 2;
parthsagar2010 10:54aa50490b15 213 data_len_1 = onesec_counter_temp & 0xff;
parthsagar2010 10:54aa50490b15 214 data_len_2 = (onesec_counter_temp >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 215 checksum_ = checksum_ + data_len_1 + data_len_2;
parthsagar2010 10:54aa50490b15 216 //pc.write((uint32_t *)packet_1, sizeof(packet_1));
parthsagar2010 10:54aa50490b15 217 uint8_t header_ecg_datalen[2] = {data_len_2,data_len_1};
parthsagar2010 10:54aa50490b15 218 pc.write((uint8_t *)header_ecg_datalen, sizeof(header_ecg_datalen));
kidecha_rahul 18:101042d225ef 219
parthsagar2010 10:54aa50490b15 220 mod_checksum = checksum_ % 65536 ;
parthsagar2010 10:54aa50490b15 221 cksm_1 = mod_checksum & 0xff;
parthsagar2010 10:54aa50490b15 222 cksm_2 = (mod_checksum >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 223 uint8_t header_ecg_checksum[2] = {cksm_2,cksm_1};
parthsagar2010 10:54aa50490b15 224 pc.write((uint8_t *)header_ecg_checksum, sizeof(header_ecg_checksum));
parthsagar2010 10:54aa50490b15 225
parthsagar2010 10:54aa50490b15 226 pc.write((int16_t *)ecgSample_1sec,onesec_counter * sizeof(int16_t));
parthsagar2010 15:0356e9454a60 227 // printf("Samples per second %d \n", (onesec_counter));
parthsagar2010 10:54aa50490b15 228 onesec_counter = 0;
parthsagar2010 10:54aa50490b15 229 // memset(ecgSample_1sec, 0, sizeof(ecgSample_1sec));
parthsagar2010 10:54aa50490b15 230
parthsagar2010 10:54aa50490b15 231 pc.write((uint8_t *)ending, sizeof(ending));
parthsagar2010 10:54aa50490b15 232 checksum_ = 0;
parthsagar2010 15:0356e9454a60 233 //t.stop();
parthsagar2010 11:300afaf2696b 234 // auto us = t.elapsed_time().count();
parthsagar2010 15:0356e9454a60 235 // float time_taken = us/1000000;
parthsagar2010 15:0356e9454a60 236 // printf("Timer time: %lu ms \n", (time_taken*100));
parthsagar2010 15:0356e9454a60 237 // t.reset();
parthsagar2010 15:0356e9454a60 238 // timer_fast.reset();
parthsagar2010 9:24ecf16eab0f 239 }
coreyharris 4:06e258ff0b97 240 // Read back ECG samples from the FIFO
parthsagar2010 9:24ecf16eab0f 241 else if( (ecgFIFOIntFlag==1))// && (timerflag == 0))
parthsagar2010 9:24ecf16eab0f 242 {
coreyharris 2:812d40f1853d 243
coreyharris 5:f8d1f651bef5 244 ecgFIFOIntFlag = 0;
coreyharris 4:06e258ff0b97 245 status = ecgAFE.readRegister( MAX30003::STATUS ); // Read the STATUS register
coreyharris 2:812d40f1853d 246
coreyharris 3:420d5efbd967 247 // Check if EINT interrupt asserted
parthsagar2010 9:24ecf16eab0f 248 if ( ( status & EINT_STATUS_MASK ) == EINT_STATUS_MASK )
parthsagar2010 9:24ecf16eab0f 249 {
coreyharris 3:420d5efbd967 250
coreyharris 4:06e258ff0b97 251 readECGSamples = 0; // Reset sample counter
coreyharris 3:420d5efbd967 252
coreyharris 2:812d40f1853d 253 do {
coreyharris 6:86ac850c718d 254 ecgFIFO = ecgAFE.readRegister( MAX30003::ECG_FIFO ); // Read FIFO
coreyharris 4:06e258ff0b97 255 ecgSample[readECGSamples] = ecgFIFO >> 8; // Isolate voltage data
parthsagar2010 10:54aa50490b15 256 ecgSample[readECGSamples] = ((ecgSample[readECGSamples]<<8)&0xFF00)|((ecgSample[readECGSamples]>>8)&0x00FF);
coreyharris 6:86ac850c718d 257 ETAG[readECGSamples] = ( ecgFIFO >> 3 ) & ETAG_BITS_MASK; // Isolate ETAG
coreyharris 4:06e258ff0b97 258 readECGSamples++; // Increment sample counter
coreyharris 3:420d5efbd967 259
coreyharris 3:420d5efbd967 260 // Check that sample is not last sample in FIFO
coreyharris 6:86ac850c718d 261 } while ( ETAG[readECGSamples-1] == FIFO_VALID_SAMPLE_MASK ||
coreyharris 6:86ac850c718d 262 ETAG[readECGSamples-1] == FIFO_FAST_SAMPLE_MASK );
coreyharris 2:812d40f1853d 263
coreyharris 3:420d5efbd967 264 // Check if FIFO has overflowed
parthsagar2010 9:24ecf16eab0f 265 if( ETAG[readECGSamples - 1] == FIFO_OVF_MASK )
parthsagar2010 9:24ecf16eab0f 266 {
coreyharris 3:420d5efbd967 267 ecgAFE.writeRegister( MAX30003::FIFO_RST , 0); // Reset FIFO
johnGreeneMaxim 7:cf0855a0450a 268 rLed = 1;//notifies the user that an over flow occured
coreyharris 3:420d5efbd967 269 }
parthsagar2010 10:54aa50490b15 270 //uint8_t header_ecg_checksum[2] = {'%','%'};
parthsagar2010 10:54aa50490b15 271 //pc.write((uint8_t *)header_ecg_checksum, sizeof(header_ecg_checksum));
coreyharris 3:420d5efbd967 272
parthsagar2010 10:54aa50490b15 273 //pc.write((int16_t *)ecgSample,readECGSamples * sizeof(int16_t ));
parthsagar2010 10:54aa50490b15 274 //memcpy(ecgSample_1sec , ecgSample, sizeof(ecgSample));
parthsagar2010 10:54aa50490b15 275
parthsagar2010 10:54aa50490b15 276 //memcpy(ecgSample_1sec + (onesec_counter * sizeof(int16_t)), ecgSample, sizeof(ecgSample));
parthsagar2010 15:0356e9454a60 277
parthsagar2010 15:0356e9454a60 278 if (flip)
parthsagar2010 15:0356e9454a60 279 {
parthsagar2010 15:0356e9454a60 280 sampleps = 12;
parthsagar2010 15:0356e9454a60 281 //printf("Flipped 12\r\n");
parthsagar2010 15:0356e9454a60 282 }
parthsagar2010 15:0356e9454a60 283 else
parthsagar2010 15:0356e9454a60 284 {
parthsagar2010 15:0356e9454a60 285 sampleps = 13;
parthsagar2010 15:0356e9454a60 286 // printf("Flipped 13\r\n");
parthsagar2010 15:0356e9454a60 287 }
parthsagar2010 15:0356e9454a60 288
parthsagar2010 15:0356e9454a60 289 for( idx = 0; idx < sampleps; idx++ )
parthsagar2010 9:24ecf16eab0f 290 {
parthsagar2010 9:24ecf16eab0f 291 //pc.printf("%6d\r\n", ecgSample[idx]);
parthsagar2010 9:24ecf16eab0f 292 ecgSample_1sec[onesec_counter] = ecgSample[idx];
parthsagar2010 10:54aa50490b15 293
parthsagar2010 10:54aa50490b15 294 cksm_1 = ecgSample[idx] & 0xff;
parthsagar2010 10:54aa50490b15 295 cksm_2 = (ecgSample[idx] >> 8) & 0xff;
parthsagar2010 10:54aa50490b15 296 checksum_ += cksm_1 + cksm_2;
parthsagar2010 9:24ecf16eab0f 297 onesec_counter++;
coreyharris 6:86ac850c718d 298 }
parthsagar2010 15:0356e9454a60 299 flip =!flip;
parthsagar2010 15:0356e9454a60 300 rLed = ! rLed;
coreyharris 0:38c49bc37c7c 301 }
parthsagar2010 10:54aa50490b15 302
coreyharris 0:38c49bc37c7c 303 }
coreyharris 0:38c49bc37c7c 304 }
coreyharris 0:38c49bc37c7c 305 }
coreyharris 0:38c49bc37c7c 306
coreyharris 0:38c49bc37c7c 307
coreyharris 0:38c49bc37c7c 308
coreyharris 0:38c49bc37c7c 309
coreyharris 0:38c49bc37c7c 310 void ecg_config(MAX30003& ecgAFE) {
coreyharris 0:38c49bc37c7c 311
coreyharris 1:86843c27cc81 312 // Reset ECG to clear registers
coreyharris 1:86843c27cc81 313 ecgAFE.writeRegister( MAX30003::SW_RST , 0);
coreyharris 0:38c49bc37c7c 314
coreyharris 1:86843c27cc81 315 // General config register setting
coreyharris 1:86843c27cc81 316 MAX30003::GeneralConfiguration_u CNFG_GEN_r;
coreyharris 3:420d5efbd967 317 CNFG_GEN_r.bits.en_ecg = 1; // Enable ECG channel
coreyharris 3:420d5efbd967 318 CNFG_GEN_r.bits.rbiasn = 1; // Enable resistive bias on negative input
coreyharris 3:420d5efbd967 319 CNFG_GEN_r.bits.rbiasp = 1; // Enable resistive bias on positive input
coreyharris 3:420d5efbd967 320 CNFG_GEN_r.bits.en_rbias = 1; // Enable resistive bias
coreyharris 3:420d5efbd967 321 CNFG_GEN_r.bits.imag = 2; // Current magnitude = 10nA
coreyharris 3:420d5efbd967 322 CNFG_GEN_r.bits.en_dcloff = 1; // Enable DC lead-off detection
parthsagar2010 12:10b49ad3c492 323 //CNFG_GEN_r.bits.fmstr = 1; //125 sps FMSTR 1
coreyharris 1:86843c27cc81 324 ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all);
coreyharris 1:86843c27cc81 325
coreyharris 1:86843c27cc81 326
coreyharris 1:86843c27cc81 327 // ECG Config register setting
coreyharris 1:86843c27cc81 328 MAX30003::ECGConfiguration_u CNFG_ECG_r;
coreyharris 3:420d5efbd967 329 CNFG_ECG_r.bits.dlpf = 1; // Digital LPF cutoff = 40Hz
coreyharris 3:420d5efbd967 330 CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz
coreyharris 3:420d5efbd967 331 CNFG_ECG_r.bits.gain = 3; // ECG gain = 160V/V
coreyharris 3:420d5efbd967 332 CNFG_ECG_r.bits.rate = 2; // Sample rate = 128 sps
coreyharris 1:86843c27cc81 333 ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all);
coreyharris 1:86843c27cc81 334
coreyharris 1:86843c27cc81 335
coreyharris 1:86843c27cc81 336 //R-to-R configuration
coreyharris 1:86843c27cc81 337 MAX30003::RtoR1Configuration_u CNFG_RTOR_r;
coreyharris 3:420d5efbd967 338 CNFG_RTOR_r.bits.en_rtor = 1; // Enable R-to-R detection
coreyharris 1:86843c27cc81 339 ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all);
coreyharris 1:86843c27cc81 340
coreyharris 1:86843c27cc81 341
coreyharris 1:86843c27cc81 342 //Manage interrupts register setting
coreyharris 1:86843c27cc81 343 MAX30003::ManageInterrupts_u MNG_INT_r;
coreyharris 3:420d5efbd967 344 MNG_INT_r.bits.efit = 0b00011; // Assert EINT w/ 4 unread samples
coreyharris 3:420d5efbd967 345 MNG_INT_r.bits.clr_rrint = 0b01; // Clear R-to-R on RTOR reg. read back
coreyharris 1:86843c27cc81 346 ecgAFE.writeRegister( MAX30003::MNGR_INT , MNG_INT_r.all);
coreyharris 0:38c49bc37c7c 347
coreyharris 0:38c49bc37c7c 348
coreyharris 1:86843c27cc81 349 //Enable interrupts register setting
coreyharris 1:86843c27cc81 350 MAX30003::EnableInterrupts_u EN_INT_r;
coreyharris 5:f8d1f651bef5 351 EN_INT_r.all = 0;
coreyharris 3:420d5efbd967 352 EN_INT_r.bits.en_eint = 1; // Enable EINT interrupt
coreyharris 4:06e258ff0b97 353 EN_INT_r.bits.en_rrint = 0; // Disable R-to-R interrupt
coreyharris 3:420d5efbd967 354 EN_INT_r.bits.intb_type = 3; // Open-drain NMOS with internal pullup
coreyharris 1:86843c27cc81 355 ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all);
coreyharris 1:86843c27cc81 356
coreyharris 1:86843c27cc81 357
coreyharris 1:86843c27cc81 358 //Dyanmic modes config
coreyharris 1:86843c27cc81 359 MAX30003::ManageDynamicModes_u MNG_DYN_r;
coreyharris 3:420d5efbd967 360 MNG_DYN_r.bits.fast = 0; // Fast recovery mode disabled
coreyharris 1:86843c27cc81 361 ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all);
coreyharris 5:f8d1f651bef5 362
coreyharris 5:f8d1f651bef5 363 // MUX Config
coreyharris 5:f8d1f651bef5 364 MAX30003::MuxConfiguration_u CNFG_MUX_r;
coreyharris 5:f8d1f651bef5 365 CNFG_MUX_r.bits.openn = 0; // Connect ECGN to AFE channel
coreyharris 5:f8d1f651bef5 366 CNFG_MUX_r.bits.openp = 0; // Connect ECGP to AFE channel
coreyharris 5:f8d1f651bef5 367 ecgAFE.writeRegister( MAX30003::CNFG_EMUX , CNFG_MUX_r.all);
coreyharris 1:86843c27cc81 368
coreyharris 1:86843c27cc81 369 return;
coreyharris 0:38c49bc37c7c 370 }
coreyharris 0:38c49bc37c7c 371