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awhitchurchawhitchurch
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Migrate to new AP. Add multi-version support
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‎.gitignore‎

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dkms.conf
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.bin
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CLAUDE.md

‎build-uno-r4.sh‎

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#!/bin/bash
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#########################################################################################
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#
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# Build script for the ProtoCentral Pulse Express library — Arduino Uno R4
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#
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# Compiles every sketch under examples/ against the Uno R4 Minima target by
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# default, or the Uno R4 WiFi target with --wifi. Installs the Renesas core
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# on first run if it is not already present.
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#
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# Copyright (c) 2025 ProtoCentral Electronics
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#
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# This software is licensed under the MIT License (http://opensource.org/licenses/MIT).
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#
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#########################################################################################
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set -euo pipefail
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LIBRARY_PATH="$(cd "$(dirname "$0")" && pwd)"
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EXAMPLES_DIR="$LIBRARY_PATH/examples"
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BOARD_FQBN="arduino:renesas_uno:minima"
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CORE_ID="arduino:renesas_uno"
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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BLUE='\033[0;34m'
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NC='\033[0m'
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print_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
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print_success() { echo -e "${GREEN}[OK]${NC} $1"; }
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print_warning() { echo -e "${YELLOW}[WARN]${NC} $1"; }
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print_error() { echo -e "${RED}[ERROR]${NC} $1"; }
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show_help() {
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cat <<EOF
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Pulse Express build script — Arduino Uno R4
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Usage: $0 [OPTIONS]
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Options:
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--wifi Build for Uno R4 WiFi (arduino:renesas_uno:unor4wifi)
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instead of the default Minima target.
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--fqbn FQBN Override the board FQBN entirely.
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-h, --help Show this help.
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The script compiles every directory found in examples/ that contains a .ino
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file with a matching name. Exit code is non-zero if any sketch fails to build.
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EOF
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}
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--wifi)
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BOARD_FQBN="arduino:renesas_uno:unor4wifi"
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shift
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;;
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--fqbn)
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BOARD_FQBN="$2"
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shift 2
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;;
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-h|--help)
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show_help
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exit 0
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;;
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*)
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print_error "Unknown option: $1"
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show_help
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exit 1
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;;
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esac
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done
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if ! command -v arduino-cli &> /dev/null; then
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print_error "arduino-cli not found"
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echo "Install from: https://arduino.github.io/arduino-cli/"
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exit 1
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fi
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if ! arduino-cli core list 2>/dev/null | awk 'NR>1 {print $1}' | grep -qx "$CORE_ID"; then
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print_info "Installing $CORE_ID core..."
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arduino-cli core update-index
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arduino-cli core install "$CORE_ID"
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fi
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if [[ ! -d "$EXAMPLES_DIR" ]]; then
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print_error "examples/ directory not found at $EXAMPLES_DIR"
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exit 1
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fi
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print_info "Target FQBN: $BOARD_FQBN"
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print_info "Library: $LIBRARY_PATH"
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echo
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declare -a SKETCHES=()
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while IFS= read -r dir; do
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name=$(basename "$dir")
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if [[ -f "$dir/$name.ino" ]]; then
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SKETCHES+=("$dir")
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else
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print_warning "Skipping $name (no $name.ino inside)"
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fi
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done < <(find "$EXAMPLES_DIR" -mindepth 1 -maxdepth 1 -type d | sort)
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if [[ ${#SKETCHES[@]} -eq 0 ]]; then
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print_error "No example sketches found under $EXAMPLES_DIR"
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exit 1
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fi
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PASS=0
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FAIL=0
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FAILED_NAMES=()
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for sketch in "${SKETCHES[@]}"; do
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name=$(basename "$sketch")
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print_info "Compiling $name ..."
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if arduino-cli compile \
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--fqbn "$BOARD_FQBN" \
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--library "$LIBRARY_PATH" \
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--warnings default \
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"$sketch" > /tmp/pulse-express-build.log 2>&1; then
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SIZE_LINE=$(grep -E "^Sketch uses" /tmp/pulse-express-build.log || true)
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print_success "$name ${SIZE_LINE#Sketch uses }"
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PASS=$((PASS + 1))
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else
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print_error "$name failed:"
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sed 's/^/ /' /tmp/pulse-express-build.log
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FAIL=$((FAIL + 1))
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FAILED_NAMES+=("$name")
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fi
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done
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echo
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echo "================================================================"
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print_info "$PASS passed, $FAIL failed (out of ${#SKETCHES[@]} sketches)"
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if [[ $FAIL -gt 0 ]]; then
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for n in "${FAILED_NAMES[@]}"; do
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echo " - $n"
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done
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exit 1
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fi
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echo "================================================================"

‎docs/6921_MAX32664D_Quick_Start_Guide_Rev2_201119.pdf‎

416 KB
Binary file not shown.

‎examples/01.RawPPGStreamPlotter/01.RawPPGStreamPlotter.ino‎

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//////////////////////////////////////////////////////////////////////////////////////////
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//
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// Pulse Express — Raw PPG stream for the Arduino Serial Plotter
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//
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// Streams the IR PPG counter from the MAX30101 (via the MAX32664D sensor hub)
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// one sample per line. Place a finger on the sensor and open Tools → Serial
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// Plotter at 57600 baud to view the waveform.
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//
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// Hardware connections (default):
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// | MAX32664 pin | Arduino pin | Function |
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// |--------------|-------------|----------------|
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// | SDA | A4 | I2C data |
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// | SCL | A5 | I2C clock |
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// | Vin | 5V | Power |
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// | GND | GND | |
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// | MFIO | D2 | Data-ready int |
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// | RESET | D4 | Hub reset |
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//
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// Original 2020 example: Joice Tm, Copyright (c) 2020 ProtoCentral
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// Modernised: Copyright (c) 2025 ProtoCentral Electronics
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//
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// This software is licensed under the MIT License (http://opensource.org/licenses/MIT).
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//
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/////////////////////////////////////////////////////////////////////////////////////////
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#include <Wire.h>
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#include "max32664.h"
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#define RESET_PIN 4
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#define MFIO_PIN 2
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#define SAMPLE_CAP 32 // max samples to drain per loop iteration
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Max32664 hub(RESET_PIN, MFIO_PIN);
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void setup()
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{
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Serial.begin(57600);
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Wire.begin();
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hub.setDebug(&Serial);
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Max32664Status s = hub.begin();
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if (s != Max32664Status::Ok)
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{
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Serial.print("hub.begin() failed: 0x");
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Serial.println(uint8_t(s), HEX);
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while (true) delay(5000);
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}
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Serial.print("Hub firmware ");
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Serial.print(hub.version().major); Serial.print('.');
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Serial.print(hub.version().minor); Serial.print('.');
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Serial.println(hub.version().patch);
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s = hub.startRaw();
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if (s != Max32664Status::Ok)
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{
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Serial.print("startRaw() failed: 0x");
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Serial.println(uint8_t(s), HEX);
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while (true) delay(5000);
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}
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delay(2000);
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}
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void loop()
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{
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Max32664RawSample buf[SAMPLE_CAP];
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size_t n = 0;
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Max32664Status s = hub.readRaw(buf, SAMPLE_CAP, &n, /*wantRed=*/false);
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if (s != Max32664Status::Ok) return;
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for (size_t i = 0; i < n; ++i)
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{
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Serial.println(buf[i].ir);
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delay(3);
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}
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}

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