Paul Jeon / Mbed OS PICO_board_demo

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Dependencies:   max32625pico SerialInterface USBDevice

main.txt@14:2a4baa07d46d, 2020-01-25 (annotated)

Committer:
mjoun
Date:
Sat Jan 25 21:16:58 2020 +0000
Revision:
14:2a4baa07d46d
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
mjoun 14:2a4baa07d46d 1 /** \file main.cpp ******************************************************
mjoun 14:2a4baa07d46d 2 *
mjoun 14:2a4baa07d46d 3 * Project: MAXREFDES117#
mjoun 14:2a4baa07d46d 4 * Filename: main.cpp
mjoun 14:2a4baa07d46d 5 * Description: This module contains the Main application for the MAXREFDES117 example program.
mjoun 14:2a4baa07d46d 6 *
mjoun 14:2a4baa07d46d 7 *
mjoun 14:2a4baa07d46d 8 * --------------------------------------------------------------------
mjoun 14:2a4baa07d46d 9 *
mjoun 14:2a4baa07d46d 10 * This code follows the following naming conventions:
mjoun 14:2a4baa07d46d 11 *
mjoun 14:2a4baa07d46d 12 * char ch_pmod_value
mjoun 14:2a4baa07d46d 13 * char (array) s_pmod_s_string[16]
mjoun 14:2a4baa07d46d 14 * float f_pmod_value
mjoun 14:2a4baa07d46d 15 * int32_t n_pmod_value
mjoun 14:2a4baa07d46d 16 * int32_t (array) an_pmod_value[16]
mjoun 14:2a4baa07d46d 17 * int16_t w_pmod_value
mjoun 14:2a4baa07d46d 18 * int16_t (array) aw_pmod_value[16]
mjoun 14:2a4baa07d46d 19 * uint16_t uw_pmod_value
mjoun 14:2a4baa07d46d 20 * uint16_t (array) auw_pmod_value[16]
mjoun 14:2a4baa07d46d 21 * uint8_t uch_pmod_value
mjoun 14:2a4baa07d46d 22 * uint8_t (array) auch_pmod_buffer[16]
mjoun 14:2a4baa07d46d 23 * uint32_t un_pmod_value
mjoun 14:2a4baa07d46d 24 * int32_t * pn_pmod_value
mjoun 14:2a4baa07d46d 25 *
mjoun 14:2a4baa07d46d 26 * ------------------------------------------------------------------------- */
mjoun 14:2a4baa07d46d 27 /*******************************************************************************
mjoun 14:2a4baa07d46d 28 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
mjoun 14:2a4baa07d46d 29 *
mjoun 14:2a4baa07d46d 30 * Permission is hereby granted, free of charge, to any person obtaining a
mjoun 14:2a4baa07d46d 31 * copy of this software and associated documentation files (the "Software"),
mjoun 14:2a4baa07d46d 32 * to deal in the Software without restriction, including without limitation
mjoun 14:2a4baa07d46d 33 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
mjoun 14:2a4baa07d46d 34 * and/or sell copies of the Software, and to permit persons to whom the
mjoun 14:2a4baa07d46d 35 * Software is furnished to do so, subject to the following conditions:
mjoun 14:2a4baa07d46d 36 *
mjoun 14:2a4baa07d46d 37 * The above copyright notice and this permission notice shall be included
mjoun 14:2a4baa07d46d 38 * in all copies or substantial portions of the Software.
mjoun 14:2a4baa07d46d 39 *
mjoun 14:2a4baa07d46d 40 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
mjoun 14:2a4baa07d46d 41 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
mjoun 14:2a4baa07d46d 42 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
mjoun 14:2a4baa07d46d 43 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
mjoun 14:2a4baa07d46d 44 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
mjoun 14:2a4baa07d46d 45 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
mjoun 14:2a4baa07d46d 46 * OTHER DEALINGS IN THE SOFTWARE.
mjoun 14:2a4baa07d46d 47 *
mjoun 14:2a4baa07d46d 48 * Except as contained in this notice, the name of Maxim Integrated
mjoun 14:2a4baa07d46d 49 * Products, Inc. shall not be used except as stated in the Maxim Integrated
mjoun 14:2a4baa07d46d 50 * Products, Inc. Branding Policy.
mjoun 14:2a4baa07d46d 51 *
mjoun 14:2a4baa07d46d 52 * The mere transfer of this software does not imply any licenses
mjoun 14:2a4baa07d46d 53 * of trade secrets, proprietary technology, copyrights, patents,
mjoun 14:2a4baa07d46d 54 * trademarks, maskwork rights, or any other form of intellectual
mjoun 14:2a4baa07d46d 55 * property whatsoever. Maxim Integrated Products, Inc. retains all
mjoun 14:2a4baa07d46d 56 * ownership rights.
mjoun 14:2a4baa07d46d 57 *******************************************************************************
mjoun 14:2a4baa07d46d 58 */
mjoun 14:2a4baa07d46d 59 /*!\mainpage Main Page
mjoun 14:2a4baa07d46d 60 *
mjoun 14:2a4baa07d46d 61 * \section intro_sec Introduction
mjoun 14:2a4baa07d46d 62 *
mjoun 14:2a4baa07d46d 63 * This is the code documentation for the MAXREFDES117# subsystem reference design.
mjoun 14:2a4baa07d46d 64 *
mjoun 14:2a4baa07d46d 65 * The Files page contains the File List page and the Globals page.
mjoun 14:2a4baa07d46d 66 *
mjoun 14:2a4baa07d46d 67 * The Globals page contains the Functions, Variables, and Macros sub-pages.
mjoun 14:2a4baa07d46d 68 *
mjoun 14:2a4baa07d46d 69 * \image html MAXREFDES117_Block_Diagram.png "MAXREFDES117# System Block Diagram"
mjoun 14:2a4baa07d46d 70 *
mjoun 14:2a4baa07d46d 71 * \image html MAXREFDES117_firmware_Flowchart.png "MAXREFDES117# Firmware Flowchart"
mjoun 14:2a4baa07d46d 72 *
mjoun 14:2a4baa07d46d 73 */
mjoun 14:2a4baa07d46d 74 #include "mbed.h"
mjoun 14:2a4baa07d46d 75 #include "algorithm.h"
mjoun 14:2a4baa07d46d 76 #include "MAX30102.h"
mjoun 14:2a4baa07d46d 77 #include "max32625pico.h"
mjoun 14:2a4baa07d46d 78
mjoun 14:2a4baa07d46d 79 #define MAX_BRIGHTNESS 255
mjoun 14:2a4baa07d46d 80
mjoun 14:2a4baa07d46d 81 uint32_t aun_ir_buffer[500]; //IR LED sensor data
mjoun 14:2a4baa07d46d 82 int32_t n_ir_buffer_length; //data length
mjoun 14:2a4baa07d46d 83 uint32_t aun_red_buffer[500]; //Red LED sensor data
mjoun 14:2a4baa07d46d 84 int32_t n_sp02; //SPO2 value
mjoun 14:2a4baa07d46d 85 int8_t ch_spo2_valid; //indicator to show if the SP02 calculation is valid
mjoun 14:2a4baa07d46d 86 int32_t n_heart_rate; //heart rate value
mjoun 14:2a4baa07d46d 87 int8_t ch_hr_valid; //indicator to show if the heart rate calculation is valid
mjoun 14:2a4baa07d46d 88 uint8_t uch_dummy;
mjoun 14:2a4baa07d46d 89
mjoun 14:2a4baa07d46d 90 Serial pc(USBTX, USBRX); //initializes the serial port
mjoun 14:2a4baa07d46d 91 #ifdef TARGET_KL25Z
mjoun 14:2a4baa07d46d 92 PwmOut led(PTB18); //initializes the pwm output that connects to the on board LED
mjoun 14:2a4baa07d46d 93 DigitalIn INT(PTD1); //pin PTD1 connects to the interrupt output pin of the MAX30102
mjoun 14:2a4baa07d46d 94 #endif
mjoun 14:2a4baa07d46d 95 #ifdef TARGET_K64F
mjoun 14:2a4baa07d46d 96 DigitalIn INT(PTD1); //pin PTD1 connects to the interrupt output pin of the MAX30102
mjoun 14:2a4baa07d46d 97 #endif
mjoun 14:2a4baa07d46d 98 #ifdef TARGET_MAX32600MBED
mjoun 14:2a4baa07d46d 99 PwmOut led(LED_RED); //initializes the pwm output that connects to the on board LED
mjoun 14:2a4baa07d46d 100 DigitalIn INT(P2_0); //pin P20 connects to the interrupt output pin of the MAX30102
mjoun 14:2a4baa07d46d 101 #endif
mjoun 14:2a4baa07d46d 102
mjoun 14:2a4baa07d46d 103 MAX32625PICO pico(MAX32625PICO::IOH_DIP_IN, MAX32625PICO::VIO_IOH, MAX32625PICO::VIO_1V8);
mjoun 14:2a4baa07d46d 104 // the setup routine runs once when you press reset:
mjoun 14:2a4baa07d46d 105 int main() {
mjoun 14:2a4baa07d46d 106 uint32_t un_min, un_max, un_prev_data; //variables to calculate the on-board LED brightness that reflects the heartbeats
mjoun 14:2a4baa07d46d 107 int i;
mjoun 14:2a4baa07d46d 108 int32_t n_brightness;
mjoun 14:2a4baa07d46d 109 float f_temp;
mjoun 14:2a4baa07d46d 110
mjoun 14:2a4baa07d46d 111 maxim_max30102_reset(); //resets the MAX30102
mjoun 14:2a4baa07d46d 112 // initialize serial communication at 115200 bits per second:
mjoun 14:2a4baa07d46d 113 pc.baud(115200);
mjoun 14:2a4baa07d46d 114 pc.format(8,SerialBase::None,1);
mjoun 14:2a4baa07d46d 115 wait(1);
mjoun 14:2a4baa07d46d 116
mjoun 14:2a4baa07d46d 117 //read and clear status register
mjoun 14:2a4baa07d46d 118 maxim_max30102_read_reg(0,&uch_dummy);
mjoun 14:2a4baa07d46d 119
mjoun 14:2a4baa07d46d 120 //wait until the user presses a key
mjoun 14:2a4baa07d46d 121 while(pc.readable()==0)
mjoun 14:2a4baa07d46d 122 {
mjoun 14:2a4baa07d46d 123 pc.printf("\x1B[2J"); //clear terminal program screen
mjoun 14:2a4baa07d46d 124 pc.printf("Press any key to start conversion\n\r");
mjoun 14:2a4baa07d46d 125 wait(1);
mjoun 14:2a4baa07d46d 126 }
mjoun 14:2a4baa07d46d 127 uch_dummy=getchar();
mjoun 14:2a4baa07d46d 128
mjoun 14:2a4baa07d46d 129 maxim_max30102_init(); //initializes the MAX30102
mjoun 14:2a4baa07d46d 130
mjoun 14:2a4baa07d46d 131
mjoun 14:2a4baa07d46d 132 n_brightness=0;
mjoun 14:2a4baa07d46d 133 un_min=0x3FFFF;
mjoun 14:2a4baa07d46d 134 un_max=0;
mjoun 14:2a4baa07d46d 135
mjoun 14:2a4baa07d46d 136 n_ir_buffer_length=500; //buffer length of 100 stores 5 seconds of samples running at 100sps
mjoun 14:2a4baa07d46d 137
mjoun 14:2a4baa07d46d 138 //read the first 500 samples, and determine the signal range
mjoun 14:2a4baa07d46d 139 for(i=0;i<n_ir_buffer_length;i++)
mjoun 14:2a4baa07d46d 140 {
mjoun 14:2a4baa07d46d 141 while(INT.read()==1); //wait until the interrupt pin asserts
mjoun 14:2a4baa07d46d 142
mjoun 14:2a4baa07d46d 143 maxim_max30102_read_fifo((aun_red_buffer+i), (aun_ir_buffer+i)); //read from MAX30102 FIFO
mjoun 14:2a4baa07d46d 144
mjoun 14:2a4baa07d46d 145 if(un_min>aun_red_buffer[i])
mjoun 14:2a4baa07d46d 146 un_min=aun_red_buffer[i]; //update signal min
mjoun 14:2a4baa07d46d 147 if(un_max<aun_red_buffer[i])
mjoun 14:2a4baa07d46d 148 un_max=aun_red_buffer[i]; //update signal max
mjoun 14:2a4baa07d46d 149 pc.printf("red=");
mjoun 14:2a4baa07d46d 150 pc.printf("%i", aun_red_buffer[i]);
mjoun 14:2a4baa07d46d 151 pc.printf(", ir=");
mjoun 14:2a4baa07d46d 152 pc.printf("%i\n\r", aun_ir_buffer[i]);
mjoun 14:2a4baa07d46d 153 }
mjoun 14:2a4baa07d46d 154 un_prev_data=aun_red_buffer[i];
mjoun 14:2a4baa07d46d 155
mjoun 14:2a4baa07d46d 156
mjoun 14:2a4baa07d46d 157 //calculate heart rate and SpO2 after first 500 samples (first 5 seconds of samples)
mjoun 14:2a4baa07d46d 158 maxim_heart_rate_and_oxygen_saturation(aun_ir_buffer, n_ir_buffer_length, aun_red_buffer, &n_sp02, &ch_spo2_valid, &n_heart_rate, &ch_hr_valid);
mjoun 14:2a4baa07d46d 159
mjoun 14:2a4baa07d46d 160 //Continuously taking samples from MAX30102. Heart rate and SpO2 are calculated every 1 second
mjoun 14:2a4baa07d46d 161 while(1)
mjoun 14:2a4baa07d46d 162 {
mjoun 14:2a4baa07d46d 163 i=0;
mjoun 14:2a4baa07d46d 164 un_min=0x3FFFF;
mjoun 14:2a4baa07d46d 165 un_max=0;
mjoun 14:2a4baa07d46d 166
mjoun 14:2a4baa07d46d 167 //dumping the first 100 sets of samples in the memory and shift the last 400 sets of samples to the top
mjoun 14:2a4baa07d46d 168 for(i=100;i<500;i++)
mjoun 14:2a4baa07d46d 169 {
mjoun 14:2a4baa07d46d 170 aun_red_buffer[i-100]=aun_red_buffer[i];
mjoun 14:2a4baa07d46d 171 aun_ir_buffer[i-100]=aun_ir_buffer[i];
mjoun 14:2a4baa07d46d 172
mjoun 14:2a4baa07d46d 173 //update the signal min and max
mjoun 14:2a4baa07d46d 174 if(un_min>aun_red_buffer[i])
mjoun 14:2a4baa07d46d 175 un_min=aun_red_buffer[i];
mjoun 14:2a4baa07d46d 176 if(un_max<aun_red_buffer[i])
mjoun 14:2a4baa07d46d 177 un_max=aun_red_buffer[i];
mjoun 14:2a4baa07d46d 178 }
mjoun 14:2a4baa07d46d 179
mjoun 14:2a4baa07d46d 180 //take 100 sets of samples before calculating the heart rate.
mjoun 14:2a4baa07d46d 181 for(i=400;i<500;i++)
mjoun 14:2a4baa07d46d 182 {
mjoun 14:2a4baa07d46d 183 un_prev_data=aun_red_buffer[i-1];
mjoun 14:2a4baa07d46d 184 while(INT.read()==1);
mjoun 14:2a4baa07d46d 185 maxim_max30102_read_fifo((aun_red_buffer+i), (aun_ir_buffer+i));
mjoun 14:2a4baa07d46d 186
mjoun 14:2a4baa07d46d 187 if(aun_red_buffer[i]>un_prev_data)
mjoun 14:2a4baa07d46d 188 {
mjoun 14:2a4baa07d46d 189 f_temp=aun_red_buffer[i]-un_prev_data;
mjoun 14:2a4baa07d46d 190 f_temp/=(un_max-un_min);
mjoun 14:2a4baa07d46d 191 f_temp*=MAX_BRIGHTNESS;
mjoun 14:2a4baa07d46d 192 n_brightness-=(int)f_temp;
mjoun 14:2a4baa07d46d 193 if(n_brightness<0)
mjoun 14:2a4baa07d46d 194 n_brightness=0;
mjoun 14:2a4baa07d46d 195 }
mjoun 14:2a4baa07d46d 196 else
mjoun 14:2a4baa07d46d 197 {
mjoun 14:2a4baa07d46d 198 f_temp=un_prev_data-aun_red_buffer[i];
mjoun 14:2a4baa07d46d 199 f_temp/=(un_max-un_min);
mjoun 14:2a4baa07d46d 200 f_temp*=MAX_BRIGHTNESS;
mjoun 14:2a4baa07d46d 201 n_brightness+=(int)f_temp;
mjoun 14:2a4baa07d46d 202 if(n_brightness>MAX_BRIGHTNESS)
mjoun 14:2a4baa07d46d 203 n_brightness=MAX_BRIGHTNESS;
mjoun 14:2a4baa07d46d 204 }
mjoun 14:2a4baa07d46d 205 #if defined(TARGET_KL25Z) || defined(TARGET_MAX32600MBED)
mjoun 14:2a4baa07d46d 206 led.write(1-(float)n_brightness/256);
mjoun 14:2a4baa07d46d 207 #endif
mjoun 14:2a4baa07d46d 208 //send samples and calculation result to terminal program through UART
mjoun 14:2a4baa07d46d 209 pc.printf("red=");
mjoun 14:2a4baa07d46d 210 pc.printf("%i", aun_red_buffer[i]);
mjoun 14:2a4baa07d46d 211 pc.printf(", ir=");
mjoun 14:2a4baa07d46d 212 pc.printf("%i", aun_ir_buffer[i]);
mjoun 14:2a4baa07d46d 213 pc.printf(", HR=%i, ", n_heart_rate);
mjoun 14:2a4baa07d46d 214 pc.printf("HRvalid=%i, ", ch_hr_valid);
mjoun 14:2a4baa07d46d 215 pc.printf("SpO2=%i, ", n_sp02);
mjoun 14:2a4baa07d46d 216 pc.printf("SPO2Valid=%i\n\r", ch_spo2_valid);
mjoun 14:2a4baa07d46d 217 }
mjoun 14:2a4baa07d46d 218 maxim_heart_rate_and_oxygen_saturation(aun_ir_buffer, n_ir_buffer_length, aun_red_buffer, &n_sp02, &ch_spo2_valid, &n_heart_rate, &ch_hr_valid);
mjoun 14:2a4baa07d46d 219 }
mjoun 14:2a4baa07d46d 220 }
mjoun 14:2a4baa07d46d 221