Debug demo for ECG
Dependencies: MAX30003 max32630fthr
Fork of MAX30003_Demo_Debug by
Diff: main.cpp
- Revision:
- 4:828118be72d0
- Parent:
- 3:420d5efbd967
- Child:
- 5:202ed7222217
--- a/main.cpp Tue Aug 22 21:40:49 2017 +0000 +++ b/main.cpp Mon Aug 28 20:55:47 2017 +0000 @@ -1,3 +1,37 @@ +/******************************************************************************* + * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES + * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name of Maxim Integrated + * Products, Inc. shall not be used except as stated in the Maxim Integrated + * Products, Inc. Branding Policy. + * + * The mere transfer of this software does not imply any licenses + * of trade secrets, proprietary technology, copyrights, patents, + * trademarks, maskwork rights, or any other form of intellectual + * property whatsoever. Maxim Integrated Products, Inc. retains all + * ownership rights. + ******************************************************************************* + */ + + #include "mbed.h" #include "max32630fthr.h" #include "MAX30003.h" @@ -16,8 +50,8 @@ int main() { - const int RTOR_STATUS_MASK = ( 1<<10 ); - const int EINT_STATUS_MASK = ( 1<<23 ); + + const int EINT_STATUS_MASK = 1 << 23; Serial pc(USBTX, USBRX); // Use USB debug probe for serial link pc.baud(115200); // Baud rate = 115200 @@ -32,55 +66,41 @@ SPI spiBus(SPI2_MOSI, SPI2_MISO, SPI2_SCK); // SPI bus, P5_1 = MOSI, // P5_2 = MISO, P5_0 = SCK - MAX30003 * ecgAFE; - ecgAFE = new MAX30003(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3 - ecg_config(*ecgAFE); // Config ECG + MAX30003 ecgAFE(spiBus, P5_3); // New MAX30003 on spiBus, CS = P5_3 + ecg_config( ecgAFE ); // Config ECG - ecgAFE->writeRegister( MAX30003::SYNCH , 0); + ecgAFE.writeRegister( MAX30003::SYNCH , 0); - uint32_t ecgFIFO, readSamples, idx, ETAG[32], status, RtoR; + uint32_t ecgFIFO, readECGSamples, idx, ETAG[32], status; int16_t ecgSample[32]; - float BPM; while(1) { /* Read back ECG samples from the FIFO */ if( ecgFIFOIntFlag ) { + ecgFIFOIntFlag = 0; pc.printf("Interrupt received....\r\n"); - status = ecgAFE->readRegister( MAX30003::STATUS ); // Read the STATUS register - pc.printf("Status : 0x%x\r\n" - "Current BPM is %3.2f\r\n\r\n", status, BPM); - - // Check if R-to-R interrupt asserted - if( ( status & RTOR_STATUS_MASK ) == RTOR_STATUS_MASK ){ // Check if RtoR update - - ecgFIFOIntFlag = 0; - pc.printf("R-to-R Interrupt \r\n"); - RtoR = ecgAFE->readRegister( MAX30003::RTOR ); // Read RtoR register - BPM = 60.0*RtoR/32768.0; // Convert to BPM - pc.printf("RtoR : %d\r\n\r\n", RtoR); // Print BPM/RtoR - - } + status = ecgAFE.readRegister( MAX30003::STATUS ); // Read the STATUS register + pc.printf("Status : 0x%x\r\n\r\n", status); // Check if EINT interrupt asserted if ( ( status & EINT_STATUS_MASK ) == EINT_STATUS_MASK ) { - ecgFIFOIntFlag = 0; pc.printf("FIFO Interrupt \r\n"); - readSamples = 0; // Reset sample counter + readECGSamples = 0; // Reset sample counter do { - ecgFIFO = ecgAFE->readRegister( MAX30003::ECG_FIFO ); // Read FIFO - ecgSample[readSamples] = ecgFIFO >> 8; // Isolate voltage data - ETAG[readSamples] = ( ecgFIFO >> 3 ) & 0b111; // Isolate ETAG - readSamples++; // Increment sample counter + ecgFIFO = ecgAFE.readRegister( MAX30003::ECG_FIFO ); // Read FIFO + ecgSample[readECGSamples] = ecgFIFO >> 8; // Isolate voltage data + ETAG[readECGSamples] = ( ecgFIFO >> 3 ) & 0b111; // Isolate ETAG + readECGSamples++; // Increment sample counter // Check that sample is not last sample in FIFO - } while ( ETAG[readSamples-1] == 0x0 || - ETAG[readSamples-1] == 0x1 ); + } while ( ETAG[readECGSamples-1] == 0x0 || + ETAG[readECGSamples-1] == 0x1 ); - pc.printf("%d samples read from FIFO \r\n", readSamples); + pc.printf("%d samples read from FIFO \r\n", readECGSamples); // Check if FIFO has overflowed if( ETAG[readECGSamples - 1] == 0x7 ){ @@ -88,12 +108,11 @@ } /* Print results */ - for( idx = 0; idx < readSamples; idx++ ) { + for( idx = 0; idx < readECGSamples; idx++ ) { pc.printf("Sample : %6d, \tETAG : 0x%x\r\n", ecgSample[idx], ETAG[idx]); } pc.printf("\r\n\r\n\r\n"); } - } } } @@ -112,23 +131,24 @@ CNFG_GEN_r.bits.rbiasn = 1; // Enable resistive bias on negative input CNFG_GEN_r.bits.rbiasp = 1; // Enable resistive bias on positive input CNFG_GEN_r.bits.en_rbias = 1; // Enable resistive bias - CNFG_GEN_r.bits.imag = 2; // Current magnitude = 10nA CNFG_GEN_r.bits.en_dcloff = 1; // Enable DC lead-off detection + CNFG_GEN_r.bits.imag = 0b010; // Current magnitude = 10nA + CNFG_GEN_r.bits.rbiasv = 0b00; // Resistive bias = 50MOhm ecgAFE.writeRegister( MAX30003::CNFG_GEN , CNFG_GEN_r.all); // ECG Config register setting MAX30003::ECGConfiguration_u CNFG_ECG_r; - CNFG_ECG_r.bits.dlpf = 1; // Digital LPF cutoff = 40Hz - CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz - CNFG_ECG_r.bits.gain = 3; // ECG gain = 160V/V - CNFG_ECG_r.bits.rate = 2; // Sample rate = 128 sps + CNFG_ECG_r.bits.dlpf = 0b01; // Digital LPF cutoff = 40Hz + CNFG_ECG_r.bits.dhpf = 1; // Digital HPF cutoff = 0.5Hz + CNFG_ECG_r.bits.gain = 0b11; // ECG gain = 160V/V + CNFG_ECG_r.bits.rate = 0b10; // Sample rate = 128 sps ecgAFE.writeRegister( MAX30003::CNFG_ECG , CNFG_ECG_r.all); //R-to-R configuration MAX30003::RtoR1Configuration_u CNFG_RTOR_r; - CNFG_RTOR_r.bits.en_rtor = 1; // Enable R-to-R detection + CNFG_RTOR_r.bits.en_rtor = 0; // Disable R-to-R detection ecgAFE.writeRegister( MAX30003::CNFG_RTOR1 , CNFG_RTOR_r.all); @@ -142,8 +162,8 @@ //Enable interrupts register setting MAX30003::EnableInterrupts_u EN_INT_r; EN_INT_r.bits.en_eint = 1; // Enable EINT interrupt - EN_INT_r.bits.en_rrint = 1; // Enable R-to-R interrupt - EN_INT_r.bits.intb_type = 3; // Open-drain NMOS with internal pullup + EN_INT_r.bits.en_rrint = 0; // Disable R-to-R interrupt + EN_INT_r.bits.intb_type = 0b11; // Open-drain NMOS with internal pullup ecgAFE.writeRegister( MAX30003::EN_INT , EN_INT_r.all); @@ -151,6 +171,13 @@ MAX30003::ManageDynamicModes_u MNG_DYN_r; MNG_DYN_r.bits.fast = 0; // Fast recovery mode disabled ecgAFE.writeRegister( MAX30003::MNGR_DYN , MNG_DYN_r.all); + + // MUX Config + MAX30003::MuxConfiguration_u CNFG_MUX_r; + CNFG_MUX_r.bits.openn = 0; // Connect ECGN to AFE channel + CNFG_MUX_r.bits.openp = 0; // Connect ECGP to AFE channel + ecgAFE.writeRegister( MAX30003::CNFG_EMUX , CNFG_MUX_r.all); + return;