John Greene / Mbed OS MAX30003_Demo_Debug

Debug demo for ECG

Dependencies:   MAX30003 max32630fthr

Fork of MAX30003_Demo_Debug by Central Applications - Mbed Code repo

main.cpp@2:812d40f1853d, 2017-08-18 (annotated)

Committer:
coreyharris
Date:
Fri Aug 18 17:37:07 2017 +0000
Revision:
2:812d40f1853d
Parent:
1:86843c27cc81
Child:
3:420d5efbd967
Read status register to determine the interrupt. Attempt to get R-to-R working, but no-go. The program works however, and prints ECG FIFO data;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
coreyharris 0:38c49bc37c7c 1 #include "mbed.h"
coreyharris 0:38c49bc37c7c 2 #include "max32630fthr.h"
coreyharris 0:38c49bc37c7c 3 #include "MAX30003.h"
coreyharris 0:38c49bc37c7c 4
coreyharris 0:38c49bc37c7c 5 MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
coreyharris 0:38c49bc37c7c 6
coreyharris 0:38c49bc37c7c 7 void ecg_config(MAX30003 &ecgAFE);
coreyharris 0:38c49bc37c7c 8
coreyharris 0:38c49bc37c7c 9 /* ECG FIFO nearly full callback */
coreyharris 0:38c49bc37c7c 10 volatile bool ecgFIFOIntFlag = 0;
coreyharris 0:38c49bc37c7c 11 void ecgFIFO_callback() {
coreyharris 0:38c49bc37c7c 12
coreyharris 0:38c49bc37c7c 13 ecgFIFOIntFlag = 1;
coreyharris 0:38c49bc37c7c 14
coreyharris 0:38c49bc37c7c 15 }
coreyharris 0:38c49bc37c7c 16
coreyharris 0:38c49bc37c7c 17 int main()
coreyharris 0:38c49bc37c7c 18 {
coreyharris 1:86843c27cc81 19 Serial pc(USBTX, USBRX); // Use USB debug probe for serial link
coreyharris 1:86843c27cc81 20 pc.baud(115200); // Baud rate = 115200
coreyharris 1:86843c27cc81 21
coreyharris 1:86843c27cc81 22 DigitalOut rLed(LED1, LED_OFF); // Debug LEDs
coreyharris 0:38c49bc37c7c 23 DigitalOut gLed(LED2, LED_OFF);
coreyharris 0:38c49bc37c7c 24 DigitalOut bLed(LED3, LED_OFF);
coreyharris 0:38c49bc37c7c 25
coreyharris 1:86843c27cc81 26 InterruptIn ecgFIFO_int(P5_4); // Config P5_4 as int. in for the
coreyharris 1:86843c27cc81 27 ecgFIFO_int.fall(&ecgFIFO_callback); // ecg FIFO almost full interrupt
coreyharris 0:38c49bc37c7c 28
coreyharris 1:86843c27cc81 29 SPI spiBus(SPI2_MOSI, SPI2_MISO, SPI2_SCK); // SPI bus, P5_1 = MOSI,
coreyharris 1:86843c27cc81 30 // P5_2 = MISO, P5_0 = SCK
coreyharris 0:38c49bc37c7c 31
coreyharris 0:38c49bc37c7c 32 MAX30003 *ecgAFE;
coreyharris 1:86843c27cc81 33 ecgAFE = new MAX30003(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3
coreyharris 1:86843c27cc81 34 ecg_config(*ecgAFE); // Config ECG
coreyharris 1:86843c27cc81 35
coreyharris 0:38c49bc37c7c 36
coreyharris 1:86843c27cc81 37 ecgAFE->writeRegister( MAX30003::SYNCH , 0);
coreyharris 0:38c49bc37c7c 38
coreyharris 2:812d40f1853d 39 uint32_t ecgFIFO, readSamples, idx, ETAG[32], status, RtoR;
coreyharris 1:86843c27cc81 40 int16_t ecgSample[32];
coreyharris 2:812d40f1853d 41 float BPM;
coreyharris 2:812d40f1853d 42
coreyharris 1:86843c27cc81 43 while(1) {
coreyharris 1:86843c27cc81 44
coreyharris 1:86843c27cc81 45 bLed = LED_ON;
coreyharris 1:86843c27cc81 46
coreyharris 0:38c49bc37c7c 47 /* Read back ECG samples from the FIFO */
coreyharris 0:38c49bc37c7c 48 if( ecgFIFOIntFlag ) {
coreyharris 2:812d40f1853d 49 pc.printf("Interrupt received....\r\n");
coreyharris 1:86843c27cc81 50 bLed = LED_OFF;
coreyharris 2:812d40f1853d 51 // Clear interrupt flag
coreyharris 2:812d40f1853d 52
coreyharris 2:812d40f1853d 53 status = ecgAFE->readRegister( MAX30003::STATUS );
coreyharris 2:812d40f1853d 54 pc.printf("Status : 0x%x\r\nCurrent BPM is %f\r\n\r\n", status, BPM);
coreyharris 2:812d40f1853d 55
coreyharris 1:86843c27cc81 56
coreyharris 2:812d40f1853d 57 if( ( status & (1<<10) ) == (1<<10) ){
coreyharris 2:812d40f1853d 58 ecgFIFOIntFlag = 0;
coreyharris 2:812d40f1853d 59 pc.printf("R-to-R Interrupt \r\n");
coreyharris 2:812d40f1853d 60 RtoR = ecgAFE->readRegister( MAX30003::RTOR );
coreyharris 2:812d40f1853d 61 BPM = 60.0*RtoR/32768.0;
coreyharris 2:812d40f1853d 62 pc.printf("RtoR : %d\r\n\r\n", RtoR);
coreyharris 2:812d40f1853d 63 }
coreyharris 2:812d40f1853d 64
coreyharris 2:812d40f1853d 65 if ( ( status & (1<<23) ) == (1<<23) ) {
coreyharris 2:812d40f1853d 66 ecgFIFOIntFlag = 0;
coreyharris 2:812d40f1853d 67 pc.printf("FIFO Interrupt \r\n");
coreyharris 2:812d40f1853d 68 readSamples = 0; // Reset sample counter
coreyharris 2:812d40f1853d 69 do {
coreyharris 2:812d40f1853d 70 ecgFIFO = ecgAFE->readRegister( MAX30003::ECG_FIFO ); // Read FIFO
coreyharris 2:812d40f1853d 71 ecgSample[readSamples] = ecgFIFO >> 8; // Isolate voltage data
coreyharris 2:812d40f1853d 72 ETAG[readSamples] = ( ecgFIFO >> 3 ) & 0b111; // Isolate ETAG
coreyharris 2:812d40f1853d 73 readSamples++; // Increment sample counter
coreyharris 2:812d40f1853d 74 } while ( ETAG[readSamples-1] == 0x0 || ETAG[readSamples-1] == 0x1 ); // Check that sample is valid
coreyharris 1:86843c27cc81 75
coreyharris 2:812d40f1853d 76 pc.printf("%d samples read from FIFO \r\n", readSamples);
coreyharris 2:812d40f1853d 77
coreyharris 2:812d40f1853d 78 for( idx = 0; idx < readSamples; idx++ ) {
coreyharris 2:812d40f1853d 79 pc.printf("Sample : %6d, \tETAG : 0x%x\r\n", ecgSample[idx], ETAG[idx]);
coreyharris 2:812d40f1853d 80 }
coreyharris 2:812d40f1853d 81 pc.printf("\r\n\r\n\r\n");
coreyharris 0:38c49bc37c7c 82 }
coreyharris 2:812d40f1853d 83
coreyharris 0:38c49bc37c7c 84 }
coreyharris 0:38c49bc37c7c 85 }
coreyharris 0:38c49bc37c7c 86 }
coreyharris 0:38c49bc37c7c 87
coreyharris 0:38c49bc37c7c 88
coreyharris 0:38c49bc37c7c 89
coreyharris 0:38c49bc37c7c 90
coreyharris 0:38c49bc37c7c 91 void ecg_config(MAX30003& ecgAFE) {
coreyharris 0:38c49bc37c7c 92
coreyharris 1:86843c27cc81 93 // Reset ECG to clear registers
coreyharris 1:86843c27cc81 94 ecgAFE.writeRegister( MAX30003::SW_RST , 0);
coreyharris 0:38c49bc37c7c 95
coreyharris 0:38c49bc37c7c 96
coreyharris 0:38c49bc37c7c 97
coreyharris 1:86843c27cc81 98 // General config register setting
coreyharris 1:86843c27cc81 99 MAX30003::GeneralConfiguration_u CNFG_GEN_r;
coreyharris 1:86843c27cc81 100 CNFG_GEN_r.bits.en_ecg = 1;
coreyharris 1:86843c27cc81 101 CNFG_GEN_r.bits.rbiasn = 1;
coreyharris 1:86843c27cc81 102 CNFG_GEN_r.bits.rbiasp = 1;
coreyharris 1:86843c27cc81 103 CNFG_GEN_r.bits.en_rbias = 1;
coreyharris 1:86843c27cc81 104 CNFG_GEN_r.bits.imag = 2;
coreyharris 1:86843c27cc81 105 CNFG_GEN_r.bits.en_dcloff = 1;
coreyharris 1:86843c27cc81 106 ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all);
coreyharris 1:86843c27cc81 107
coreyharris 1:86843c27cc81 108
coreyharris 1:86843c27cc81 109 // ECG Config register setting
coreyharris 1:86843c27cc81 110 MAX30003::ECGConfiguration_u CNFG_ECG_r;
coreyharris 1:86843c27cc81 111 CNFG_ECG_r.bits.dlpf = 1;
coreyharris 1:86843c27cc81 112 CNFG_ECG_r.bits.dhpf = 1;
coreyharris 1:86843c27cc81 113 CNFG_ECG_r.bits.gain = 3;
coreyharris 1:86843c27cc81 114 CNFG_ECG_r.bits.rate = 3;
coreyharris 1:86843c27cc81 115 ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all);
coreyharris 1:86843c27cc81 116
coreyharris 1:86843c27cc81 117
coreyharris 1:86843c27cc81 118 //R-to-R configuration
coreyharris 1:86843c27cc81 119 MAX30003::RtoR1Configuration_u CNFG_RTOR_r;
coreyharris 1:86843c27cc81 120 CNFG_RTOR_r.bits.en_rtor = 1;
coreyharris 1:86843c27cc81 121 ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all);
coreyharris 1:86843c27cc81 122
coreyharris 1:86843c27cc81 123
coreyharris 1:86843c27cc81 124 //Manage interrupts register setting
coreyharris 1:86843c27cc81 125 MAX30003::ManageInterrupts_u MNG_INT_r;
coreyharris 2:812d40f1853d 126 MNG_INT_r.bits.efit = 0b00011;
coreyharris 2:812d40f1853d 127 MNG_INT_r.bits.clr_rrint = 0b01;
coreyharris 1:86843c27cc81 128 ecgAFE.writeRegister( MAX30003::MNGR_INT , MNG_INT_r.all);
coreyharris 0:38c49bc37c7c 129
coreyharris 0:38c49bc37c7c 130
coreyharris 1:86843c27cc81 131 //Enable interrupts register setting
coreyharris 1:86843c27cc81 132 MAX30003::EnableInterrupts_u EN_INT_r;
coreyharris 1:86843c27cc81 133 EN_INT_r.all = 0;
coreyharris 1:86843c27cc81 134 EN_INT_r.bits.en_eint = 1;
coreyharris 2:812d40f1853d 135 EN_INT_r.bits.en_rrint = 1;
coreyharris 1:86843c27cc81 136 EN_INT_r.bits.intb_type = 0b11;
coreyharris 1:86843c27cc81 137 ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all);
coreyharris 1:86843c27cc81 138
coreyharris 1:86843c27cc81 139
coreyharris 1:86843c27cc81 140 //Dyanmic modes config
coreyharris 1:86843c27cc81 141 MAX30003::ManageDynamicModes_u MNG_DYN_r;
coreyharris 1:86843c27cc81 142 MNG_DYN_r.bits.fast = 0;
coreyharris 1:86843c27cc81 143 ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all);
coreyharris 1:86843c27cc81 144
coreyharris 0:38c49bc37c7c 145
coreyharris 1:86843c27cc81 146 //MUX Config
coreyharris 1:86843c27cc81 147 MAX30003::MuxConfiguration_u CNFG_MUX_r;
coreyharris 1:86843c27cc81 148 CNFG_MUX_r.bits.pol = 0;
coreyharris 1:86843c27cc81 149 ecgAFE.writeRegister( MAX30003::CNFG_EMUX , CNFG_MUX_r.all);
coreyharris 0:38c49bc37c7c 150
coreyharris 1:86843c27cc81 151 return;
coreyharris 0:38c49bc37c7c 152 }
coreyharris 0:38c49bc37c7c 153