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Changes added for the DISCO-L476VG
main.cpp
- Committer:
- MaximGordon
- Date:
- 2016-04-20
- Revision:
- 0:346a7fa07998
- Child:
- 3:7c0fb55eb3ff
File content as of revision 0:346a7fa07998:
/** \file main.cpp ****************************************************** * * Project: MAXREFDES117# * Filename: main.cpp * Description: This module contains the Main application for the MAXREFDES117 example program. * * Revision History: *\n 1-18-2016 Rev 01.00 GL Initial release. *\n * * -------------------------------------------------------------------- * * This code follows the following naming conventions: * *\n char ch_pmod_value *\n char (array) s_pmod_s_string[16] *\n float f_pmod_value *\n int32_t n_pmod_value *\n int32_t (array) an_pmod_value[16] *\n int16_t w_pmod_value *\n int16_t (array) aw_pmod_value[16] *\n uint16_t uw_pmod_value *\n uint16_t (array) auw_pmod_value[16] *\n uint8_t uch_pmod_value *\n uint8_t (array) auch_pmod_buffer[16] *\n uint32_t un_pmod_value *\n int32_t * pn_pmod_value * * ------------------------------------------------------------------------- */ /******************************************************************************* * Copyright (C) 2015 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. ******************************************************************************* */ /*!\mainpage Main Page * * \section intro_sec Introduction * * This is the code documentation for the MAXREFDES117# subsystem reference design. * \n * \n The Files page contains the File List page and the Globals page. * \n * \n The Globals page contains the Functions, Variables, and Macros sub-pages. * * \image html MAXREFDES117_Block_Diagram.png "MAXREFDES117# System Block Diagram" * \n * \image html MAXREFDES117_firmware_Flowchart.png "MAXREFDES117# Firmware Flowchart" * */ #include "mbed.h" #include "main.h" #include "algorithm.h" #include "MAX30102.h" #define MAX_BRIGHTNESS 255 uint32_t un_ir_buffer[500]; //IR LED sensor data int32_t n_ir_buffer_length; //data length uint32_t un_red_buffer[500]; //Red LED sensor data int32_t n_sp02; //SPO2 value int8_t ch_spo2_valid; //indicator to show if the SP02 calculation is valid int32_t n_heart_rate; //heart rate value int8_t ch_hr_valid; //indicator to show if the heart rate calculation is valid uint8_t uch_dummy; Serial pc(USBTX, USBRX); //initializes the serial port #ifdef TARGET_KL25Z PwmOut led(PTB18); //initializes the pwm output that connects to the on board LED DigitalIn INT(PTD1); //pin PTD1 connects to the interrupt output pin of the MAX30102 #endif #ifdef TARGET_K64F DigitalIn INT(PTD1); //pin PTD1 connects to the interrupt output pin of the MAX30102 #endif #ifdef TARGET_MAX32600MBED PwmOut led(LED_RED); //initializes the pwm output that connects to the on board LED DigitalIn INT(P2_0); //pin P20 connects to the interrupt output pin of the MAX30102 #endif // the setup routine runs once when you press reset: int main() { uint32_t un_min, un_max, un_prev_data; //variables to calculate the on-board LED brightness that reflects the heartbeats int i; int32_t n_brightness; float f_temp; maxim_max30102_reset(); //resets the MAX30102 // initialize serial communication at 115200 bits per second: pc.baud(115200); pc.format(8,SerialBase::None,1); wait(1); //read and clear status register maxim_max30102_read_reg(0,&uch_dummy); //wait until the user presses a key while(pc.readable()==0) { pc.printf("%c[2J",27); //clear terminal program screen pc.printf("Press any key to start conversion\n\r"); wait(1); } uch_dummy=getchar(); maxim_max30102_init(); //initializes the MAX30102 n_brightness=0; un_min=0x3FFFF; un_max=0; n_ir_buffer_length=500; //buffer length of 100 stores 5 seconds of samples running at 100sps //read the first 500 samples, and determine the signal range for(i=0;i<n_ir_buffer_length;i++) { while(INT.read()==1); //wait until the interrupt pin asserts maxim_max30102_read_fifo((un_red_buffer+i), (un_ir_buffer+i)); //read from MAX30102 FIFO if(un_min>un_red_buffer[i]) un_min=un_red_buffer[i]; //update signal min if(un_max<un_red_buffer[i]) un_max=un_red_buffer[i]; //update signal max pc.printf("red="); pc.printf("%i", un_red_buffer[i]); pc.printf(", ir="); pc.printf("%i\n\r", un_ir_buffer[i]); } un_prev_data=un_red_buffer[i]; //calculate heart rate and SpO2 after first 500 samples (first 5 seconds of samples) maxim_heart_rate_and_oxygen_saturation(un_ir_buffer, n_ir_buffer_length, un_red_buffer , &n_sp02, &ch_spo2_valid , &n_heart_rate , &ch_hr_valid); //Continuously taking samples from MAX30102. Heart rate and SpO2 are calculated every 1 second while(1) { i=0; un_min=0x3FFFF; un_max=0; //dumping the first 100 sets of samples in the memory and shift the last 400 sets of samples to the top for(i=100;i<500;i++) { un_red_buffer[i-100]=un_red_buffer[i]; un_ir_buffer[i-100]=un_ir_buffer[i]; //update the signal min and max if(un_min>un_red_buffer[i]) un_min=un_red_buffer[i]; if(un_max<un_red_buffer[i]) un_max=un_red_buffer[i]; } //take 100 sets of samples before calculating the heart rate. for(i=400;i<500;i++) { un_prev_data=un_red_buffer[i-1]; while(INT.read()==1); maxim_max30102_read_fifo((un_red_buffer+i), (un_ir_buffer+i)); if(un_red_buffer[i]>un_prev_data) { f_temp=un_red_buffer[i]-un_prev_data; f_temp/=(un_max-un_min); f_temp*=MAX_BRIGHTNESS; n_brightness-=(int)f_temp; if(n_brightness<0) n_brightness=0; } else { f_temp=un_prev_data-un_red_buffer[i]; f_temp/=(un_max-un_min); f_temp*=MAX_BRIGHTNESS; n_brightness+=(int)f_temp; if(n_brightness>MAX_BRIGHTNESS) n_brightness=MAX_BRIGHTNESS; } #if defined(TARGET_KL25Z) || defined(TARGET_MAX32600MBED) led.write(1-(float)n_brightness/256); #endif //send samples and calculation result to terminal program through UART pc.printf("red="); pc.printf("%i",un_red_buffer[i]); pc.printf(", ir="); pc.printf("%i", un_ir_buffer[i]); pc.printf(", HR=%i, ",n_heart_rate); pc.printf("HRvalid=%i, ",ch_hr_valid); pc.printf("SpO2=%i, ",n_sp02); pc.printf("SPO2Valid=%i\n\r",ch_spo2_valid); } maxim_heart_rate_and_oxygen_saturation(un_ir_buffer, n_ir_buffer_length, un_red_buffer , &n_sp02, &ch_spo2_valid , &n_heart_rate , &ch_hr_valid); } }