![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
ok
Dependencies: MAX30003 max32630fthr DS1307
main.cpp@4:06e258ff0b97, 2017-08-28 (annotated)
- Committer:
- coreyharris
- Date:
- Mon Aug 28 16:09:51 2017 +0000
- Revision:
- 4:06e258ff0b97
- Parent:
- 3:420d5efbd967
- Child:
- 5:f8d1f651bef5
Plot demo final, updated comments, var names
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 | 4:06e258ff0b97 | 19 | const int EINT_STATUS_MASK = 1 << 23; |
coreyharris | 3:420d5efbd967 | 20 | |
coreyharris | 1:86843c27cc81 | 21 | Serial pc(USBTX, USBRX); // Use USB debug probe for serial link |
coreyharris | 1:86843c27cc81 | 22 | pc.baud(115200); // Baud rate = 115200 |
coreyharris | 1:86843c27cc81 | 23 | |
coreyharris | 1:86843c27cc81 | 24 | DigitalOut rLed(LED1, LED_OFF); // Debug LEDs |
coreyharris | 0:38c49bc37c7c | 25 | DigitalOut gLed(LED2, LED_OFF); |
coreyharris | 0:38c49bc37c7c | 26 | DigitalOut bLed(LED3, LED_OFF); |
coreyharris | 0:38c49bc37c7c | 27 | |
coreyharris | 1:86843c27cc81 | 28 | InterruptIn ecgFIFO_int(P5_4); // Config P5_4 as int. in for the |
coreyharris | 1:86843c27cc81 | 29 | ecgFIFO_int.fall(&ecgFIFO_callback); // ecg FIFO almost full interrupt |
coreyharris | 0:38c49bc37c7c | 30 | |
coreyharris | 1:86843c27cc81 | 31 | SPI spiBus(SPI2_MOSI, SPI2_MISO, SPI2_SCK); // SPI bus, P5_1 = MOSI, |
coreyharris | 1:86843c27cc81 | 32 | // P5_2 = MISO, P5_0 = SCK |
coreyharris | 0:38c49bc37c7c | 33 | |
coreyharris | 4:06e258ff0b97 | 34 | MAX30003 ecgAFE(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3 |
coreyharris | 4:06e258ff0b97 | 35 | ecg_config(ecgAFE); // Config ECG |
coreyharris | 1:86843c27cc81 | 36 | |
coreyharris | 0:38c49bc37c7c | 37 | |
coreyharris | 4:06e258ff0b97 | 38 | ecgAFE.writeRegister( MAX30003::SYNCH , 0); |
coreyharris | 0:38c49bc37c7c | 39 | |
coreyharris | 4:06e258ff0b97 | 40 | uint32_t ecgFIFO, readECGSamples, idx, ETAG[32], status; |
coreyharris | 1:86843c27cc81 | 41 | int16_t ecgSample[32]; |
coreyharris | 2:812d40f1853d | 42 | |
coreyharris | 1:86843c27cc81 | 43 | while(1) { |
coreyharris | 1:86843c27cc81 | 44 | |
coreyharris | 4:06e258ff0b97 | 45 | // Read back ECG samples from the FIFO |
coreyharris | 0:38c49bc37c7c | 46 | if( ecgFIFOIntFlag ) { |
coreyharris | 2:812d40f1853d | 47 | |
coreyharris | 4:06e258ff0b97 | 48 | status = ecgAFE.readRegister( MAX30003::STATUS ); // Read the STATUS register |
coreyharris | 2:812d40f1853d | 49 | |
coreyharris | 3:420d5efbd967 | 50 | // Check if EINT interrupt asserted |
coreyharris | 3:420d5efbd967 | 51 | if ( ( status & EINT_STATUS_MASK ) == EINT_STATUS_MASK ) { |
coreyharris | 3:420d5efbd967 | 52 | |
coreyharris | 3:420d5efbd967 | 53 | ecgFIFOIntFlag = 0; |
coreyharris | 4:06e258ff0b97 | 54 | readECGSamples = 0; // Reset sample counter |
coreyharris | 3:420d5efbd967 | 55 | |
coreyharris | 2:812d40f1853d | 56 | do { |
coreyharris | 4:06e258ff0b97 | 57 | ecgFIFO = ecgAFE.readRegister( MAX30003::ECG_FIFO ); // Read FIFO |
coreyharris | 4:06e258ff0b97 | 58 | ecgSample[readECGSamples] = ecgFIFO >> 8; // Isolate voltage data |
coreyharris | 4:06e258ff0b97 | 59 | ETAG[readECGSamples] = ( ecgFIFO >> 3 ) & 0b111; // Isolate ETAG |
coreyharris | 4:06e258ff0b97 | 60 | readECGSamples++; // Increment sample counter |
coreyharris | 3:420d5efbd967 | 61 | |
coreyharris | 3:420d5efbd967 | 62 | // Check that sample is not last sample in FIFO |
coreyharris | 4:06e258ff0b97 | 63 | } while ( ETAG[readECGSamples-1] == 0x0 || |
coreyharris | 4:06e258ff0b97 | 64 | ETAG[readECGSamples-1] == 0x1 ); |
coreyharris | 2:812d40f1853d | 65 | |
coreyharris | 3:420d5efbd967 | 66 | // Check if FIFO has overflowed |
coreyharris | 3:420d5efbd967 | 67 | if( ETAG[readECGSamples - 1] == 0x7 ){ |
coreyharris | 3:420d5efbd967 | 68 | ecgAFE.writeRegister( MAX30003::FIFO_RST , 0); // Reset FIFO |
coreyharris | 3:420d5efbd967 | 69 | } |
coreyharris | 3:420d5efbd967 | 70 | |
coreyharris | 4:06e258ff0b97 | 71 | // Print results |
coreyharris | 4:06e258ff0b97 | 72 | for( idx = 0; idx < readECGSamples; idx++ ) { |
coreyharris | 4:06e258ff0b97 | 73 | pc.printf("Sample : %6d\r\n", ecgSample[idx]); |
coreyharris | 4:06e258ff0b97 | 74 | } |
coreyharris | 0:38c49bc37c7c | 75 | } |
coreyharris | 0:38c49bc37c7c | 76 | } |
coreyharris | 0:38c49bc37c7c | 77 | } |
coreyharris | 0:38c49bc37c7c | 78 | } |
coreyharris | 0:38c49bc37c7c | 79 | |
coreyharris | 0:38c49bc37c7c | 80 | |
coreyharris | 0:38c49bc37c7c | 81 | |
coreyharris | 0:38c49bc37c7c | 82 | |
coreyharris | 0:38c49bc37c7c | 83 | void ecg_config(MAX30003& ecgAFE) { |
coreyharris | 0:38c49bc37c7c | 84 | |
coreyharris | 1:86843c27cc81 | 85 | // Reset ECG to clear registers |
coreyharris | 1:86843c27cc81 | 86 | ecgAFE.writeRegister( MAX30003::SW_RST , 0); |
coreyharris | 0:38c49bc37c7c | 87 | |
coreyharris | 1:86843c27cc81 | 88 | // General config register setting |
coreyharris | 1:86843c27cc81 | 89 | MAX30003::GeneralConfiguration_u CNFG_GEN_r; |
coreyharris | 3:420d5efbd967 | 90 | CNFG_GEN_r.bits.en_ecg = 1; // Enable ECG channel |
coreyharris | 3:420d5efbd967 | 91 | CNFG_GEN_r.bits.rbiasn = 1; // Enable resistive bias on negative input |
coreyharris | 3:420d5efbd967 | 92 | CNFG_GEN_r.bits.rbiasp = 1; // Enable resistive bias on positive input |
coreyharris | 3:420d5efbd967 | 93 | CNFG_GEN_r.bits.en_rbias = 1; // Enable resistive bias |
coreyharris | 3:420d5efbd967 | 94 | CNFG_GEN_r.bits.imag = 2; // Current magnitude = 10nA |
coreyharris | 3:420d5efbd967 | 95 | CNFG_GEN_r.bits.en_dcloff = 1; // Enable DC lead-off detection |
coreyharris | 1:86843c27cc81 | 96 | ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all); |
coreyharris | 1:86843c27cc81 | 97 | |
coreyharris | 1:86843c27cc81 | 98 | |
coreyharris | 1:86843c27cc81 | 99 | // ECG Config register setting |
coreyharris | 1:86843c27cc81 | 100 | MAX30003::ECGConfiguration_u CNFG_ECG_r; |
coreyharris | 3:420d5efbd967 | 101 | CNFG_ECG_r.bits.dlpf = 1; // Digital LPF cutoff = 40Hz |
coreyharris | 3:420d5efbd967 | 102 | CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz |
coreyharris | 3:420d5efbd967 | 103 | CNFG_ECG_r.bits.gain = 3; // ECG gain = 160V/V |
coreyharris | 3:420d5efbd967 | 104 | CNFG_ECG_r.bits.rate = 2; // Sample rate = 128 sps |
coreyharris | 1:86843c27cc81 | 105 | ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all); |
coreyharris | 1:86843c27cc81 | 106 | |
coreyharris | 1:86843c27cc81 | 107 | |
coreyharris | 1:86843c27cc81 | 108 | //R-to-R configuration |
coreyharris | 1:86843c27cc81 | 109 | MAX30003::RtoR1Configuration_u CNFG_RTOR_r; |
coreyharris | 3:420d5efbd967 | 110 | CNFG_RTOR_r.bits.en_rtor = 1; // Enable R-to-R detection |
coreyharris | 1:86843c27cc81 | 111 | ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all); |
coreyharris | 1:86843c27cc81 | 112 | |
coreyharris | 1:86843c27cc81 | 113 | |
coreyharris | 1:86843c27cc81 | 114 | //Manage interrupts register setting |
coreyharris | 1:86843c27cc81 | 115 | MAX30003::ManageInterrupts_u MNG_INT_r; |
coreyharris | 3:420d5efbd967 | 116 | MNG_INT_r.bits.efit = 0b00011; // Assert EINT w/ 4 unread samples |
coreyharris | 3:420d5efbd967 | 117 | MNG_INT_r.bits.clr_rrint = 0b01; // Clear R-to-R on RTOR reg. read back |
coreyharris | 1:86843c27cc81 | 118 | ecgAFE.writeRegister( MAX30003::MNGR_INT , MNG_INT_r.all); |
coreyharris | 0:38c49bc37c7c | 119 | |
coreyharris | 0:38c49bc37c7c | 120 | |
coreyharris | 1:86843c27cc81 | 121 | //Enable interrupts register setting |
coreyharris | 1:86843c27cc81 | 122 | MAX30003::EnableInterrupts_u EN_INT_r; |
coreyharris | 3:420d5efbd967 | 123 | EN_INT_r.bits.en_eint = 1; // Enable EINT interrupt |
coreyharris | 4:06e258ff0b97 | 124 | EN_INT_r.bits.en_rrint = 0; // Disable R-to-R interrupt |
coreyharris | 3:420d5efbd967 | 125 | EN_INT_r.bits.intb_type = 3; // Open-drain NMOS with internal pullup |
coreyharris | 1:86843c27cc81 | 126 | ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all); |
coreyharris | 1:86843c27cc81 | 127 | |
coreyharris | 1:86843c27cc81 | 128 | |
coreyharris | 1:86843c27cc81 | 129 | //Dyanmic modes config |
coreyharris | 1:86843c27cc81 | 130 | MAX30003::ManageDynamicModes_u MNG_DYN_r; |
coreyharris | 3:420d5efbd967 | 131 | MNG_DYN_r.bits.fast = 0; // Fast recovery mode disabled |
coreyharris | 1:86843c27cc81 | 132 | ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all); |
coreyharris | 1:86843c27cc81 | 133 | |
coreyharris | 0:38c49bc37c7c | 134 | |
coreyharris | 1:86843c27cc81 | 135 | return; |
coreyharris | 0:38c49bc37c7c | 136 | } |
coreyharris | 0:38c49bc37c7c | 137 |