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Test2
Dependencies: MAX30003 max32630fthr DS1307
main.cpp@3:420d5efbd967, 2017-08-22 (annotated)
- Committer:
- coreyharris
- Date:
- Tue Aug 22 21:40:49 2017 +0000
- Revision:
- 3:420d5efbd967
- Parent:
- 2:812d40f1853d
- Child:
- 4:06e258ff0b97
Comments, formatting, constants (done after code review).; ; Still to-do:; - BPM and RtoR reading/constants
Who changed what in which revision?
User | Revision | Line number | New 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 | 3:420d5efbd967 | 18 | { |
coreyharris | 3:420d5efbd967 | 19 | const int RTOR_STATUS_MASK = ( 1<<10 ); |
coreyharris | 3:420d5efbd967 | 20 | const int EINT_STATUS_MASK = ( 1<<23 ); |
coreyharris | 3:420d5efbd967 | 21 | |
coreyharris | 1:86843c27cc81 | 22 | Serial pc(USBTX, USBRX); // Use USB debug probe for serial link |
coreyharris | 1:86843c27cc81 | 23 | pc.baud(115200); // Baud rate = 115200 |
coreyharris | 1:86843c27cc81 | 24 | |
coreyharris | 1:86843c27cc81 | 25 | DigitalOut rLed(LED1, LED_OFF); // Debug LEDs |
coreyharris | 0:38c49bc37c7c | 26 | DigitalOut gLed(LED2, LED_OFF); |
coreyharris | 0:38c49bc37c7c | 27 | DigitalOut bLed(LED3, LED_OFF); |
coreyharris | 0:38c49bc37c7c | 28 | |
coreyharris | 1:86843c27cc81 | 29 | InterruptIn ecgFIFO_int(P5_4); // Config P5_4 as int. in for the |
coreyharris | 1:86843c27cc81 | 30 | ecgFIFO_int.fall(&ecgFIFO_callback); // ecg FIFO almost full interrupt |
coreyharris | 0:38c49bc37c7c | 31 | |
coreyharris | 1:86843c27cc81 | 32 | SPI spiBus(SPI2_MOSI, SPI2_MISO, SPI2_SCK); // SPI bus, P5_1 = MOSI, |
coreyharris | 1:86843c27cc81 | 33 | // P5_2 = MISO, P5_0 = SCK |
coreyharris | 0:38c49bc37c7c | 34 | |
coreyharris | 3:420d5efbd967 | 35 | MAX30003 * ecgAFE; |
coreyharris | 1:86843c27cc81 | 36 | ecgAFE = new MAX30003(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3 |
coreyharris | 1:86843c27cc81 | 37 | ecg_config(*ecgAFE); // Config ECG |
coreyharris | 1:86843c27cc81 | 38 | |
coreyharris | 0:38c49bc37c7c | 39 | |
coreyharris | 1:86843c27cc81 | 40 | ecgAFE->writeRegister( MAX30003::SYNCH , 0); |
coreyharris | 0:38c49bc37c7c | 41 | |
coreyharris | 2:812d40f1853d | 42 | uint32_t ecgFIFO, readSamples, idx, ETAG[32], status, RtoR; |
coreyharris | 1:86843c27cc81 | 43 | int16_t ecgSample[32]; |
coreyharris | 2:812d40f1853d | 44 | float BPM; |
coreyharris | 2:812d40f1853d | 45 | |
coreyharris | 1:86843c27cc81 | 46 | while(1) { |
coreyharris | 1:86843c27cc81 | 47 | |
coreyharris | 0:38c49bc37c7c | 48 | /* Read back ECG samples from the FIFO */ |
coreyharris | 0:38c49bc37c7c | 49 | if( ecgFIFOIntFlag ) { |
coreyharris | 2:812d40f1853d | 50 | pc.printf("Interrupt received....\r\n"); |
coreyharris | 3:420d5efbd967 | 51 | status = ecgAFE->readRegister( MAX30003::STATUS ); // Read the STATUS register |
coreyharris | 3:420d5efbd967 | 52 | pc.printf("Status : 0x%x\r\n" |
coreyharris | 3:420d5efbd967 | 53 | "Current BPM is %3.2f\r\n\r\n", status, BPM); |
coreyharris | 2:812d40f1853d | 54 | |
coreyharris | 3:420d5efbd967 | 55 | // Check if R-to-R interrupt asserted |
coreyharris | 3:420d5efbd967 | 56 | if( ( status & RTOR_STATUS_MASK ) == RTOR_STATUS_MASK ){ // Check if RtoR update |
coreyharris | 2:812d40f1853d | 57 | |
coreyharris | 2:812d40f1853d | 58 | ecgFIFOIntFlag = 0; |
coreyharris | 2:812d40f1853d | 59 | pc.printf("R-to-R Interrupt \r\n"); |
coreyharris | 3:420d5efbd967 | 60 | RtoR = ecgAFE->readRegister( MAX30003::RTOR ); // Read RtoR register |
coreyharris | 3:420d5efbd967 | 61 | BPM = 60.0*RtoR/32768.0; // Convert to BPM |
coreyharris | 3:420d5efbd967 | 62 | pc.printf("RtoR : %d\r\n\r\n", RtoR); // Print BPM/RtoR |
coreyharris | 3:420d5efbd967 | 63 | |
coreyharris | 2:812d40f1853d | 64 | } |
coreyharris | 2:812d40f1853d | 65 | |
coreyharris | 3:420d5efbd967 | 66 | // Check if EINT interrupt asserted |
coreyharris | 3:420d5efbd967 | 67 | if ( ( status & EINT_STATUS_MASK ) == EINT_STATUS_MASK ) { |
coreyharris | 3:420d5efbd967 | 68 | |
coreyharris | 3:420d5efbd967 | 69 | ecgFIFOIntFlag = 0; |
coreyharris | 2:812d40f1853d | 70 | pc.printf("FIFO Interrupt \r\n"); |
coreyharris | 3:420d5efbd967 | 71 | readSamples = 0; // Reset sample counter |
coreyharris | 3:420d5efbd967 | 72 | |
coreyharris | 2:812d40f1853d | 73 | do { |
coreyharris | 2:812d40f1853d | 74 | ecgFIFO = ecgAFE->readRegister( MAX30003::ECG_FIFO ); // Read FIFO |
coreyharris | 2:812d40f1853d | 75 | ecgSample[readSamples] = ecgFIFO >> 8; // Isolate voltage data |
coreyharris | 2:812d40f1853d | 76 | ETAG[readSamples] = ( ecgFIFO >> 3 ) & 0b111; // Isolate ETAG |
coreyharris | 2:812d40f1853d | 77 | readSamples++; // Increment sample counter |
coreyharris | 3:420d5efbd967 | 78 | |
coreyharris | 3:420d5efbd967 | 79 | // Check that sample is not last sample in FIFO |
coreyharris | 3:420d5efbd967 | 80 | } while ( ETAG[readSamples-1] == 0x0 || |
coreyharris | 3:420d5efbd967 | 81 | ETAG[readSamples-1] == 0x1 ); |
coreyharris | 1:86843c27cc81 | 82 | |
coreyharris | 2:812d40f1853d | 83 | pc.printf("%d samples read from FIFO \r\n", readSamples); |
coreyharris | 2:812d40f1853d | 84 | |
coreyharris | 3:420d5efbd967 | 85 | // Check if FIFO has overflowed |
coreyharris | 3:420d5efbd967 | 86 | if( ETAG[readECGSamples - 1] == 0x7 ){ |
coreyharris | 3:420d5efbd967 | 87 | ecgAFE.writeRegister( MAX30003::FIFO_RST , 0); // Reset FIFO |
coreyharris | 3:420d5efbd967 | 88 | } |
coreyharris | 3:420d5efbd967 | 89 | |
coreyharris | 3:420d5efbd967 | 90 | /* Print results */ |
coreyharris | 2:812d40f1853d | 91 | for( idx = 0; idx < readSamples; idx++ ) { |
coreyharris | 2:812d40f1853d | 92 | pc.printf("Sample : %6d, \tETAG : 0x%x\r\n", ecgSample[idx], ETAG[idx]); |
coreyharris | 2:812d40f1853d | 93 | } |
coreyharris | 2:812d40f1853d | 94 | pc.printf("\r\n\r\n\r\n"); |
coreyharris | 0:38c49bc37c7c | 95 | } |
coreyharris | 2:812d40f1853d | 96 | |
coreyharris | 0:38c49bc37c7c | 97 | } |
coreyharris | 0:38c49bc37c7c | 98 | } |
coreyharris | 0:38c49bc37c7c | 99 | } |
coreyharris | 0:38c49bc37c7c | 100 | |
coreyharris | 0:38c49bc37c7c | 101 | |
coreyharris | 0:38c49bc37c7c | 102 | |
coreyharris | 0:38c49bc37c7c | 103 | |
coreyharris | 0:38c49bc37c7c | 104 | void ecg_config(MAX30003& ecgAFE) { |
coreyharris | 0:38c49bc37c7c | 105 | |
coreyharris | 1:86843c27cc81 | 106 | // Reset ECG to clear registers |
coreyharris | 1:86843c27cc81 | 107 | ecgAFE.writeRegister( MAX30003::SW_RST , 0); |
coreyharris | 0:38c49bc37c7c | 108 | |
coreyharris | 1:86843c27cc81 | 109 | // General config register setting |
coreyharris | 1:86843c27cc81 | 110 | MAX30003::GeneralConfiguration_u CNFG_GEN_r; |
coreyharris | 3:420d5efbd967 | 111 | CNFG_GEN_r.bits.en_ecg = 1; // Enable ECG channel |
coreyharris | 3:420d5efbd967 | 112 | CNFG_GEN_r.bits.rbiasn = 1; // Enable resistive bias on negative input |
coreyharris | 3:420d5efbd967 | 113 | CNFG_GEN_r.bits.rbiasp = 1; // Enable resistive bias on positive input |
coreyharris | 3:420d5efbd967 | 114 | CNFG_GEN_r.bits.en_rbias = 1; // Enable resistive bias |
coreyharris | 3:420d5efbd967 | 115 | CNFG_GEN_r.bits.imag = 2; // Current magnitude = 10nA |
coreyharris | 3:420d5efbd967 | 116 | CNFG_GEN_r.bits.en_dcloff = 1; // Enable DC lead-off detection |
coreyharris | 1:86843c27cc81 | 117 | ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all); |
coreyharris | 1:86843c27cc81 | 118 | |
coreyharris | 1:86843c27cc81 | 119 | |
coreyharris | 1:86843c27cc81 | 120 | // ECG Config register setting |
coreyharris | 1:86843c27cc81 | 121 | MAX30003::ECGConfiguration_u CNFG_ECG_r; |
coreyharris | 3:420d5efbd967 | 122 | CNFG_ECG_r.bits.dlpf = 1; // Digital LPF cutoff = 40Hz |
coreyharris | 3:420d5efbd967 | 123 | CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz |
coreyharris | 3:420d5efbd967 | 124 | CNFG_ECG_r.bits.gain = 3; // ECG gain = 160V/V |
coreyharris | 3:420d5efbd967 | 125 | CNFG_ECG_r.bits.rate = 2; // Sample rate = 128 sps |
coreyharris | 1:86843c27cc81 | 126 | ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all); |
coreyharris | 1:86843c27cc81 | 127 | |
coreyharris | 1:86843c27cc81 | 128 | |
coreyharris | 1:86843c27cc81 | 129 | //R-to-R configuration |
coreyharris | 1:86843c27cc81 | 130 | MAX30003::RtoR1Configuration_u CNFG_RTOR_r; |
coreyharris | 3:420d5efbd967 | 131 | CNFG_RTOR_r.bits.en_rtor = 1; // Enable R-to-R detection |
coreyharris | 1:86843c27cc81 | 132 | ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all); |
coreyharris | 1:86843c27cc81 | 133 | |
coreyharris | 1:86843c27cc81 | 134 | |
coreyharris | 1:86843c27cc81 | 135 | //Manage interrupts register setting |
coreyharris | 1:86843c27cc81 | 136 | MAX30003::ManageInterrupts_u MNG_INT_r; |
coreyharris | 3:420d5efbd967 | 137 | MNG_INT_r.bits.efit = 0b00011; // Assert EINT w/ 4 unread samples |
coreyharris | 3:420d5efbd967 | 138 | MNG_INT_r.bits.clr_rrint = 0b01; // Clear R-to-R on RTOR reg. read back |
coreyharris | 1:86843c27cc81 | 139 | ecgAFE.writeRegister( MAX30003::MNGR_INT , MNG_INT_r.all); |
coreyharris | 0:38c49bc37c7c | 140 | |
coreyharris | 0:38c49bc37c7c | 141 | |
coreyharris | 1:86843c27cc81 | 142 | //Enable interrupts register setting |
coreyharris | 1:86843c27cc81 | 143 | MAX30003::EnableInterrupts_u EN_INT_r; |
coreyharris | 3:420d5efbd967 | 144 | EN_INT_r.bits.en_eint = 1; // Enable EINT interrupt |
coreyharris | 3:420d5efbd967 | 145 | EN_INT_r.bits.en_rrint = 1; // Enable R-to-R interrupt |
coreyharris | 3:420d5efbd967 | 146 | EN_INT_r.bits.intb_type = 3; // Open-drain NMOS with internal pullup |
coreyharris | 1:86843c27cc81 | 147 | ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all); |
coreyharris | 1:86843c27cc81 | 148 | |
coreyharris | 1:86843c27cc81 | 149 | |
coreyharris | 1:86843c27cc81 | 150 | //Dyanmic modes config |
coreyharris | 1:86843c27cc81 | 151 | MAX30003::ManageDynamicModes_u MNG_DYN_r; |
coreyharris | 3:420d5efbd967 | 152 | MNG_DYN_r.bits.fast = 0; // Fast recovery mode disabled |
coreyharris | 1:86843c27cc81 | 153 | ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all); |
coreyharris | 1:86843c27cc81 | 154 | |
coreyharris | 0:38c49bc37c7c | 155 | |
coreyharris | 1:86843c27cc81 | 156 | return; |
coreyharris | 0:38c49bc37c7c | 157 | } |
coreyharris | 0:38c49bc37c7c | 158 |