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opengamma_pico_original.cpp
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/*
Open Gamma Detector Sketch
Only works on the Raspberry Pi Pico with arduino-pico!
Triggers on newly detected pulses and measures their energy.
2022, NuclearPhoenix. Open Gamma Project.
https://github.com/OpenGammaProject/Open-Gamma-Detector
## NOTE:
## Only change the highlighted USER SETTINGS below
## except you know exactly what you are doing!
## Flash with default settings and
## Flash Size: "2MB (Sketch: 1984KB, FS: 64KB)"
TODO: (?) Adafruit TinyUSB lib: WebUSB support
TODO: dead time correction for cps -> Running Average for dead time!
TODO: cps bar graph while in Geiger Mode instead of empty spectrum
*/
#define _TASK_SCHEDULING_OPTIONS
#define _TASK_TIMECRITICAL // Enable monitoring scheduling overruns
#define _TASK_SLEEP_ON_IDLE_RUN // Enable 1 ms SLEEP_IDLE powerdowns between tasks if no callback methods were invoked during the pass
#include <TaskScheduler.h> // Periodically executes tasks
//#include <ADCInput.h> // Special SiPM readout utilizing the ADC FIFO and Round Robin
#include "hardware/vreg.h" // Used for vreg_set_voltage
#include "Helper.h" // Misc helper functions
#include <SimpleShell_Enhanced.h> // Serial Commands/Console
#include <ArduinoJson.h> // Load and save the settings file
#include <LittleFS.h> // Used for FS, stores the settings and debug files
#include <RunningMedian.h> // Used to get running median and average with circular buffers
/*
===================
BEGIN USER SETTINGS
===================
*/
// These are the default settings that can only be changed by reflashing the Pico
#define SCREEN_TYPE SCREEN_SSD1306 // Display type: Either SCREEN_SSD1306 or SCREEN_SH1106
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define SCREEN_ADDRESS 0x3C // See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32
#define PH_RESET 1 // Milliseconds after which the P&H circuit will be reset once
#define EVENT_BUFFER 50000 // Buffer this many events for Serial.print
#define TRNG_BITS 8 // Number of bits for each random number, max 8
#define BASELINE_NUM 101 // Number of measurements taken to determine the DC baseline
#define CONFIG_FILE "/config.json" // File to store the settings
#define DEBUG_FILE "/debug.json" // File to store some misc debug info
#define DISPLAY_REFRESH 1000 // Milliseconds between display refreshs
#define BUZZER_PIN 9 // Digital PWM pin the buzzer is connected to
#define BUZZER_FREQ 3000 // Frequency used for the buzzer PWM
#define TICK_RATE 10 // Buzzer clicks once every TICK_RATE counts
struct Config {
// These are the default settings that can also be changes via the serial commands
bool ser_output = true; // Wheter data should be Serial.println'ed
bool geiger_mode = false; // Measure only cps, not energy
bool print_spectrum = false; // Print the finishes spectrum, not just chronological events
size_t meas_avg = 5; // Number of meas. averaged each event, higher=longer dead time
bool enable_display = false; // Enable I2C Display, see settings above
bool trng_enabled = false; // Enable the True Random Number Generator
bool subtract_baseline = false; // Subtract the DC bias from each pulse
bool cps_correction = true; // Correct the cps for the DNL compensation
uint8_t buzzer_tick = 0; // Ticker on-time for one pulse in ms
// Do NOT modify this function:
bool operator==(const Config &other) const {
return (buzzer_tick == other.buzzer_tick && cps_correction == other.cps_correction && ser_output == other.ser_output && geiger_mode == other.geiger_mode && print_spectrum == other.print_spectrum && meas_avg == other.meas_avg && enable_display == other.enable_display && trng_enabled == other.trng_enabled && subtract_baseline == other.subtract_baseline);
}
};
/*
=================
END USER SETTINGS
=================
*/
const String FWVERS = "3.5.2"; // Firmware Version Code
const uint8_t GND_PIN = A2; // GND meas pin
const uint8_t VSYS_MEAS = A3; // VSYS/3
const uint8_t VBUS_MEAS = 24; // VBUS Sense Pin
const uint8_t PS_PIN = 23; // SMPS power save pin
const uint8_t AIN_PIN = A1; // Analog input pin
const uint8_t AMP_PIN = A0; // Preamp (baseline) meas pin
const uint8_t INT_PIN = 16; // Signal interrupt pin
const uint8_t RST_PIN = 22; // Peak detector MOSFET reset pin
const uint8_t LED = 25; // LED on GP25
const uint16_t EVT_RESET_C = 3000; // Number of counts after which the OLED stats will be reset
const uint16_t OUT_REFRESH = 1000; // Milliseconds between serial data outputs
const float VREF_VOLTAGE = 3.0; // ADC reference voltage, defaults 3.3, with reference 3.0
const uint8_t ADC_RES = 12; // Use 12-bit ADC resolution
volatile uint32_t spectrum[uint16_t(pow(2, ADC_RES))]; // Holds the output histogram (spectrum)
volatile uint32_t display_spectrum[uint16_t(pow(2, ADC_RES))]; // Holds the display histogram (spectrum)
volatile uint16_t events[EVENT_BUFFER]; // Buffer array for single events
volatile uint32_t event_position = 0; // Target index in events array
volatile unsigned long start_time = 0; // Time in ms when the spectrum collection has started
volatile unsigned long last_time = 0; // Last time the display has been refreshed
volatile uint32_t last_total = 0; // Last total pulse count for display
volatile unsigned long trng_stamps[3]; // Timestamps for True Random Number Generator
volatile uint8_t random_num = 0b00000000; // Generated random bits that form a byte together
volatile uint8_t bit_index = 0; // Bit index for the generated number
volatile uint32_t trng_nums[1000]; // TRNG number output array
volatile uint16_t number_index = 0; // Amount of saved numbers to the TRNG array
volatile unsigned long dt_sum = 0; // Total detector dead time in µs
volatile uint32_t dt_sum_num = 0; // Number of dead time measurements
RunningMedian baseline(BASELINE_NUM); // Array of a number of baseline (DC bias) measurements at the SiPM input
uint16_t current_baseline = 0; // Median value of the input baseline voltage
volatile bool adc_lock = false; // Locks the ADC if it's currently in use
// Stores 5 * DISPLAY_REFRESH worth of "current" cps to calculate an average cps value in a ring buffer config
RunningMedian counts(5);
Config conf; // Configuration object
//ADCInput sipm(AMP_PIN);
// Check for the right display type
#if (SCREEN_TYPE == SCREEN_SH1106)
#include <Adafruit_SH110X.h>
#define DISPLAY_WHITE SH110X_WHITE
Adafruit_SH1106G display = Adafruit_SH1106G(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
#elif (SCREEN_TYPE == SCREEN_SSD1306)
#include <Adafruit_SSD1306.h>
#define DISPLAY_WHITE SSD1306_WHITE
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
#endif
// Forward declaration of callbacks
void writeDebugFileTime();
void queryButton();
void updateDisplay();
void dataOutput();
void updateBaseline();
void resetPHCircuit();
// Tasks
Task writeDebugFileTimeTask(60 * 60 * 1000, TASK_FOREVER, &writeDebugFileTime);
Task queryButtonTask(100, TASK_FOREVER, &queryButton);
Task updateDisplayTask(DISPLAY_REFRESH, TASK_FOREVER, &updateDisplay);
Task dataOutputTask(OUT_REFRESH, TASK_FOREVER, &dataOutput);
Task updateBaselineTask(1, TASK_FOREVER, &updateBaseline);
Task resetPHCircuitTask(PH_RESET, TASK_FOREVER, &resetPHCircuit);
// Scheduler
Scheduler schedule;
void resetSampleHold(uint8_t time = 2) { // Reset sample and hold circuit
digitalWriteFast(RST_PIN, HIGH);
delayMicroseconds(time); // Discharge for (default) 2 µs -> ~99% discharge time for 1 kOhm and 470 pF
digitalWriteFast(RST_PIN, LOW);
}
void queryButton() {
if (BOOTSEL) {
// Switch between Geiger and Energy modes
conf.geiger_mode = !conf.geiger_mode;
event_position = 0;
clearSpectrum();
clearSpectrumDisplay();
resetSampleHold();
if (conf.geiger_mode) {
println("Switched to geiger mode.");
} else {
println("Switched to energy measuring mode.");
}
saveSettings(); // Saved updated settings
while (BOOTSEL) { // Wait for BOOTSEL to be released
rp2040.wdt_reset(); // Reset watchdog so that the device doesn't quit if pressed for too long
delay(1);
}
}
rp2040.wdt_reset(); // Reset watchdog, everything is fine
}
void updateDisplay() {
// Update display every DISPLAY_REFRESH ms
// MAYBE ONLY START TASK IF DISPLAY IS ENABLED?
if (conf.enable_display) {
if (conf.geiger_mode) {
drawGeigerCounts();
} else {
drawSpectrum();
}
}
}
void dataOutput() {
// MAYBE ONLY START TASK IF OUTPUT IS ENABLED?
if (conf.ser_output) {
if (Serial || Serial2) {
if (conf.print_spectrum) {
for (uint16_t index = 0; index < uint16_t(pow(2, ADC_RES)); index++) {
cleanPrint(String(spectrum[index]) + ";");
//spectrum[index] = 0; // Uncomment for differential histogram
}
cleanPrintln();
} else if (event_position > 0 && event_position <= EVENT_BUFFER) {
for (uint16_t index = 0; index < event_position; index++) {
cleanPrint(String(events[index]) + ";");
}
cleanPrintln();
}
}
event_position = 0;
}
// MAYBE SEPARATE TRNG AND SERIAL OUTPUT TASKS?
if (conf.trng_enabled) {
if (Serial || Serial2) {
for (size_t i = 0; i < number_index; i++) {
cleanPrint(trng_nums[i], DEC);
cleanPrintln(";");
}
number_index = 0;
}
}
}
void updateBaseline() {
static uint8_t baseline_done = 0;
// Compute the median DC baseline to subtract from each pulse
if (conf.subtract_baseline) {
if (!adc_lock) {
adc_lock = true; // Disable interrupt ADC measurements while resetting
baseline.add(analogRead(AIN_PIN));
adc_lock = false;
baseline_done++;
if (baseline_done >= BASELINE_NUM) {
current_baseline = round(baseline.getMedian()); // Take the median value
baseline_done = 0;
}
}
}
}
void resetPHCircuit() {
if (!adc_lock) {
adc_lock = true; // Disable interrupt ADC measurements while resetting
resetSampleHold(); // Periodically reset the S&H/P&H circuit
adc_lock = false;
}
// TODO: Check if adc was locked and decrease interval to compensate
}
void setSerialOutMode(String *args) {
String command = *args;
command.replace("set out", "");
command.trim();
if (command == "spectrum") {
conf.ser_output = true;
conf.print_spectrum = true;
println("Set serial output mode to spectrum histogram.");
} else if (command == "events") {
conf.ser_output = true;
conf.print_spectrum = false;
println("Set serial output mode to events.");
} else if (command == "disable") {
conf.ser_output = false;
conf.print_spectrum = false;
println("Disabled serial outputs.");
} else {
println("Invalid input '" + command + "'.", true);
println("Must be 'spectrum', 'events' or 'disable'.", true);
return;
}
saveSettings();
}
void toggleDisplay(String *args) {
String command = *args;
command.replace("set display", "");
command.trim();
if (command == "enable") {
conf.enable_display = true;
println("Enabled display output. You might need to reboot the device.");
} else if (command == "disable") {
conf.enable_display = false;
println("Disabled display output. You might need to reboot the device.");
} else {
println("Invalid input '" + command + "'.", true);
println("Must be 'enable' or 'disable'.", true);
return;
}
saveSettings();
}
void setTickerTime(String *args) {
String command = *args;
command.replace("set ticker", "");
command.trim();
const long number = command.toInt();
if (number >= 0) {
conf.buzzer_tick = number;
println("Set ticker output to " + String(number) + ".");
println("You might need to reboot the device.");
} else {
println("Invalid input '" + command + "'.", true);
println("Parameter must be a number >= 0.", true);
return;
}
saveSettings();
}
void setMode(String *args) {
String command = *args;
command.replace("set mode", "");
command.trim();
if (command == "geiger") {
conf.geiger_mode = true;
event_position = 0;
println("Enabled geiger mode.");
} else if (command == "energy") {
conf.geiger_mode = false;
event_position = 0;
println("Enabled energy measuring mode.");
} else {
println("Invalid input '" + command + "'.", true);
println("Must be 'geiger' or 'energy'.", true);
return;
}
resetSampleHold();
saveSettings();
}
void toggleTRNG(String *args) {
String command = *args;
command.replace("set trng", "");
command.trim();
if (command == "enable") {
conf.trng_enabled = true;
println("Enabled True Random Number Generator output.");
} else if (command == "disable") {
conf.trng_enabled = false;
println("Disabled True Random Number Generator output.");
} else {
println("Invalid input '" + command + "'.", true);
println("Must be 'enable' or 'disable'.", true);
return;
}
saveSettings();
}
void toggleBaseline(String *args) {
String command = *args;
command.replace("set baseline", "");
command.trim();
if (command == "enable") {
conf.subtract_baseline = true;
println("Enabled automatic DC bias subtraction.");
} else if (command == "disable") {
conf.subtract_baseline = false;
current_baseline = 0; // Reset baseline back to zero
println("Disabled automatic DC bias subtraction.");
} else {
println("Invalid input '" + command + "'.", true);
println("Must be 'enable' or 'disable'.", true);
return;
}
saveSettings();
}
void toggleCPSCorrection(String *args) {
String command = *args;
command.replace("set correction", "");
command.trim();
if (command == "enable") {
conf.cps_correction = true;
println("Enabled CPS correction.");
} else if (command == "disable") {
conf.cps_correction = false;
println("Disabled CPS correction.");
} else {
println("Invalid input '" + command + "'.", true);
println("Must be 'enable' or 'disable'.", true);
return;
}
saveSettings();
}
void setMeasAveraging(String *args) {
String command = *args;
command.replace("set averaging", "");
command.trim();
const long number = command.toInt();
if (number > 0) {
conf.meas_avg = number;
println("Set measurement averaging to " + String(number) + ".");
} else {
println("Invalid input '" + command + "'.", true);
println("Parameter must be a number > 0.", true);
return;
}
saveSettings();
}
void deviceInfo([[maybe_unused]] String *args) {
File debugFile = LittleFS.open(DEBUG_FILE, "r");
DynamicJsonDocument doc(512);
DeserializationError error = deserializeJson(doc, debugFile);
uint32_t power_cycle, power_on;
if (!debugFile || error) {
power_cycle = 0;
power_on = 0;
} else {
power_cycle = doc["power_cycle_count"];
power_on = doc["power_on_hours"];
}
debugFile.close();
println("=========================");
println("-- Open Gamma Detector --");
println("By NuclearPhoenix, Open Gamma Project");
println("2023. https://github.com/OpenGammaProject");
println("Firmware Version: " + FWVERS);
println("=========================");
println("Runtime: " + String(millis() / 1000.0) + " s");
print("Average Dead Time: ");
if (dt_sum_num == 0) {
cleanPrint("no impulses");
} else {
cleanPrint(String(round(float(dt_sum) / float(dt_sum_num)), 0));
}
cleanPrintln(" µs");
const float deadtime_frac = float(dt_sum) / 1000.0 / float(millis()) * 100.0;
println("Total Dead Time: " + String(deadtime_frac) + " %");
println("Total Number Of Impulses: " + String(dt_sum_num));
println("CPU Frequency: " + String(rp2040.f_cpu() / 1e6) + " MHz");
println("Used Heap Memory: " + String(rp2040.getUsedHeap() / 1000.0) + " kB");
println("Free Heap Memory: " + String(rp2040.getFreeHeap() / 1000.0) + " kB");
println("Total Heap Size: " + String(rp2040.getTotalHeap() / 1000.0) + " kB");
println("Temperature: " + String(round(readTemp() * 10.0) / 10.0, 1) + " °C");
println("USB Connection: " + String(digitalRead(VBUS_MEAS)));
const float v = 3.0 * analogRead(VSYS_MEAS) * VREF_VOLTAGE / (pow(2, ADC_RES) - 1);
println("Supply Voltage: " + String(round(v * 10.0) / 10.0, 1) + " V");
print("Power Cycle Count: ");
if (power_cycle == 0) {
cleanPrintln("n/a");
} else {
cleanPrintln(power_cycle);
}
print("Power-on hours: ");
if (power_on == 0) {
cleanPrintln("n/a");
} else {
cleanPrintln(power_on);
}
}
void fsInfo([[maybe_unused]] String *args) {
FSInfo fsinfo;
LittleFS.info(fsinfo);
println("Total Size: " + String(fsinfo.totalBytes / 1000.0) + " kB");
print("Used Size: " + String(fsinfo.usedBytes / 1000.0) + " kB");
cleanPrintln(" / " + String(float(fsinfo.usedBytes) / fsinfo.totalBytes * 100) + " %");
println("Block Size: " + String(fsinfo.blockSize / 1000.0) + " kB");
println("Page Size: " + String(fsinfo.pageSize) + " B");
println("Max Open Files: " + String(fsinfo.maxOpenFiles));
println("Max Path Length: " + String(fsinfo.maxPathLength));
}
void getSpectrumData([[maybe_unused]] String *args) {
cleanPrintln();
println("Pulse height histogram, ready to be copied:");
for (size_t i = 0; i < pow(2, ADC_RES); i++) {
cleanPrintln(spectrum[i]);
}
cleanPrintln();
}
void clearSpectrumData([[maybe_unused]] String *args) {
println("Resetting spectrum...");
clearSpectrum();
//clearSpectrumDisplay();
println("Successfully reset spectrum!");
}
void readSettings([[maybe_unused]] String *args) {
File saveFile = LittleFS.open(CONFIG_FILE, "r");
if (!saveFile) {
println("Could not open save file!", true);
return;
}
DynamicJsonDocument doc(1024);
DeserializationError error = deserializeJson(doc, saveFile);
saveFile.close();
if (error) {
print("Could not load config from json file: ", true);
cleanPrintln(error.f_str());
return;
}
serializeJsonPretty(doc, Serial);
cleanPrintln();
println("Read settings file successfully.");
}
void resetSettings([[maybe_unused]] String *args) {
Config defaultConf; // New Config object with all default parameters
conf = defaultConf;
println("Applied default settings.");
println("You might need to reboot for all changes to take effect.");
saveSettings();
}
void rebootNow([[maybe_unused]] String *args) {
println("You might need to reconnect after reboot.");
println("Rebooting now...");
delay(1000);
rp2040.reboot();
}
void clearSpectrum() {
for (size_t i = 0; i < pow(2, ADC_RES); i++) {
spectrum[i] = 0;
}
}
void clearSpectrumDisplay() {
for (size_t i = 0; i < pow(2, ADC_RES); i++) {
display_spectrum[i] = 0;
}
start_time = millis(); // Spectrum pulse collection has started
last_time = millis();
last_total = 0; // Remove old values
}
void readDebugFile() {
File debugFile = LittleFS.open(DEBUG_FILE, "r");
if (!debugFile) {
println("Could not open debug file!", true);
return;
}
DynamicJsonDocument doc(512);
DeserializationError error = deserializeJson(doc, debugFile);
debugFile.close();
if (error) {
print("Could not load debug info from json file: ", true);
cleanPrintln(error.f_str());
return;
}
serializeJsonPretty(doc, Serial);
cleanPrintln();
println("Read debug file successfully.");
}
void writeDebugFileTime() {
// ALMOST THE SAME AS THE BOOT DEBUG FILE WRITE!
File debugFile = LittleFS.open(DEBUG_FILE, "r"); // Open read and write
DynamicJsonDocument doc(512);
DeserializationError error = deserializeJson(doc, debugFile);
if (!debugFile || error) {
//println("Could not open debug file!", true);
print("Could not load debug info from json file: ", true);
cleanPrintln(error.f_str());
doc["power_cycle_count"] = 0;
doc["power_on_hours"] = 0;
}
debugFile.close();
uint32_t temp = 0;
if (doc.containsKey("power_on_hours")) {
temp = doc["power_on_hours"];
}
doc["power_on_hours"] = ++temp;
debugFile = LittleFS.open(DEBUG_FILE, "w"); // Open read and write
serializeJson(doc, debugFile);
debugFile.close();
}
void writeDebugFileBoot() {
// ALMOST THE SAME AS THE TIME DEBUG FILE WRITE!
File debugFile = LittleFS.open(DEBUG_FILE, "r"); // Open read and write
DynamicJsonDocument doc(512);
DeserializationError error = deserializeJson(doc, debugFile);
if (!debugFile || error) {
//println("Could not open debug file!", true);
print("Could not load debug info from json file: ", true);
cleanPrintln(error.f_str());
doc["power_cycle_count"] = 0;
doc["power_on_hours"] = 0;
}
debugFile.close();
uint32_t temp = 0;
if (doc.containsKey("power_cycle_count")) {
temp = doc["power_cycle_count"];
}
doc["power_cycle_count"] = ++temp;
debugFile = LittleFS.open(DEBUG_FILE, "w"); // Open read and write
serializeJson(doc, debugFile);
debugFile.close();
}
Config loadSettings(bool msg = true) {
Config new_conf;
File saveFile = LittleFS.open(CONFIG_FILE, "r");
if (!saveFile) {
println("Could not open save file! Creating a fresh file...", true);
writeSettingsFile(); // Force creation of a new file
return new_conf;
}
DynamicJsonDocument doc(1024);
DeserializationError error = deserializeJson(doc, saveFile);
saveFile.close();
if (error) {
print("Could not load config from json file: ", true);
cleanPrintln(error.f_str());
return new_conf;
}
if (doc.containsKey("ser_output")) {
new_conf.ser_output = doc["ser_output"];
}
if (doc.containsKey("geiger_mode")) {
new_conf.geiger_mode = doc["geiger_mode"];
}
if (doc.containsKey("print_spectrum")) {
new_conf.print_spectrum = doc["print_spectrum"];
}
if (doc.containsKey("meas_avg")) {
new_conf.meas_avg = doc["meas_avg"];
}
if (doc.containsKey("enable_display")) {
new_conf.enable_display = doc["enable_display"];
}
if (doc.containsKey("trng_enabled")) {
new_conf.trng_enabled = doc["trng_enabled"];
}
if (doc.containsKey("subtract_baseline")) {
new_conf.subtract_baseline = doc["subtract_baseline"];
}
if (doc.containsKey("cps_correction")) {
new_conf.cps_correction = doc["cps_correction"];
}
if (doc.containsKey("buzzer_tick")) {
new_conf.buzzer_tick = doc["buzzer_tick"];
}
if (msg) {
println("Successfuly loaded settings from flash.");
}
return new_conf;
}
bool writeSettingsFile() {
File saveFile = LittleFS.open(CONFIG_FILE, "w");
if (!saveFile) {
println("Could not open save file!", true);
return false;
}
DynamicJsonDocument doc(1024);
doc["ser_output"] = conf.ser_output;
doc["geiger_mode"] = conf.geiger_mode;
doc["print_spectrum"] = conf.print_spectrum;
doc["meas_avg"] = conf.meas_avg;
doc["enable_display"] = conf.enable_display;
doc["trng_enabled"] = conf.trng_enabled;
doc["subtract_baseline"] = conf.subtract_baseline;
doc["cps_correction"] = conf.cps_correction;
doc["buzzer_tick"] = conf.buzzer_tick;
serializeJson(doc, saveFile);
saveFile.close();
return true;
}
bool saveSettings() {
Config read_conf = loadSettings(false);
if (read_conf == conf) {
//println("Settings did not change... not writing to flash.");
return false;
}
//println("Successfuly written config to flash.");
return writeSettingsFile();
}
void serialEvent() {
Shell.handleEvent(); // Handle the serial input for the USB Serial
}
void serialEvent2() {
Shell.handleEvent(); // Handle the serial input for the Hardware Serial
}
float readTemp() {
adc_lock = true; // Flag this, so that nothing else uses the ADC in the mean time
delayMicroseconds(conf.meas_avg * 20); // Wait for an already-executing interrupt
const float temp = analogReadTemp(VREF_VOLTAGE);
adc_lock = false;
return temp;
}
void drawSpectrum() {
const uint16_t BINSIZE = floor(pow(2, ADC_RES) / SCREEN_WIDTH);
uint32_t eventBins[SCREEN_WIDTH];
uint16_t offset = 0;
uint32_t max_num = 0;
uint32_t total = 0;
for (uint16_t i = 0; i < SCREEN_WIDTH; i++) {
uint32_t totalValue = 0;
for (uint16_t j = offset; j < offset + BINSIZE; j++) {
totalValue += display_spectrum[j];
}
offset += BINSIZE;
eventBins[i] = totalValue;
if (totalValue > max_num) {
max_num = totalValue;
}
total += totalValue;
}
float scale_factor = 0.0;
if (max_num > 0) { // No events accumulated, catch divide by zero
scale_factor = float(SCREEN_HEIGHT - 11) / float(max_num);
}
uint32_t new_total = total - last_total;
last_total = total;
if (millis() < last_time) { // Catch Millis() Rollover
last_time = millis();
return;
}
unsigned long time_delta = millis() - last_time;
last_time = millis();
if (time_delta == 0) { // Catch divide by zero
time_delta = 1000;
}
display.clearDisplay();
display.setCursor(0, 0);
counts.add(new_total * 1000.0 / time_delta);
display.print(counts.getAverage(), 1);
display.print(" cps");
static int16_t temp = round(readTemp());
if (!adc_lock) { // Only update if ADC is free atm
temp = round(readTemp());
}
if (temp < 0) {
display.setCursor(SCREEN_WIDTH - 36, 0);
} else {
display.setCursor(SCREEN_WIDTH - 30, 0);
}
display.print(temp);
display.print(" ");
display.print((char)247);
display.println("C");
const unsigned long seconds_running = round((millis() - start_time) / 1000.0);
const uint8_t char_offset = floor(log10(seconds_running));
display.setCursor(SCREEN_WIDTH - 18 - char_offset * 6, 8);
display.print(seconds_running);
display.println(" s");
for (uint16_t i = 0; i < SCREEN_WIDTH; i++) {
uint32_t val = round(eventBins[i] * scale_factor);
display.drawFastVLine(i, SCREEN_HEIGHT - val - 1, val, DISPLAY_WHITE);
}
display.drawFastHLine(0, SCREEN_HEIGHT - 1, SCREEN_WIDTH, DISPLAY_WHITE);
display.display();
if (total > EVT_RESET_C) {
clearSpectrumDisplay();
}
}
void drawGeigerCounts() {
uint32_t total = 0;
for (uint16_t i = 0; i < pow(2, ADC_RES); i++) {
total += display_spectrum[i];
}
uint32_t new_total = total - last_total;
last_total = total;
if (millis() < last_time) { // Catch Millis() Rollover
last_time = millis();
return;
}
unsigned long time_delta = millis() - last_time;
last_time = millis();
if (time_delta == 0) { // Catch divide by zero
time_delta = 1000;
}
counts.add(new_total * 1000.0 / time_delta);
float avg_cps = counts.getAverage();
static float max_cps = -1;
static float min_cps = -1;
if (max_cps == -1 || avg_cps > max_cps) {
max_cps = avg_cps;
}
if (min_cps <= 0 || avg_cps < min_cps) {
min_cps = avg_cps;
}
display.clearDisplay();
display.setCursor(0, 0);
display.print("Min: ");
display.println(min_cps, 1);
display.print("Max: ");
display.println(max_cps, 1);
static int16_t temp = round(readTemp());
if (!adc_lock) { // Only update if ADC is free atm
temp = round(readTemp());
}
if (temp < 0) {
display.setCursor(SCREEN_WIDTH - 36, 0);
} else {
display.setCursor(SCREEN_WIDTH - 30, 0);
}
display.print(temp);
display.print(" ");
display.print((char)247);
display.println("C");
display.setCursor(0, 0);
display.setTextSize(2);
display.drawFastHLine(0, 18, SCREEN_WIDTH, DISPLAY_WHITE);
display.setCursor(0, 22);
if (avg_cps > 1000) {
display.print(avg_cps / 1000.0, 2);
display.println(" kcps");
} else {
display.print(avg_cps, 1);
display.println(" cps");
}
display.setTextSize(1);
display.display();
}
void eventInt() {
// Disable interrupt generation for this pin ASAP.
// Directly uses Core0 IRQ Ctrl (core1 does not set the interrupt).
// Thanks a lot to all the replies at
// https://github.com/earlephilhower/arduino-pico/discussions/1397!
static io_rw_32 *addr = &(iobank0_hw->proc0_irq_ctrl.inte[INT_PIN / 8]);
static uint32_t mask1 = 0b1111 << (INT_PIN % 8) * 4u;
hw_clear_bits(addr, mask1);
const unsigned long start = micros();
digitalWriteFast(LED, HIGH); // Enable activity LED
const unsigned long start_millis = millis();
static unsigned long last_tick = start_millis; // Last buzzer tick in ms, not needed with tone()
static uint8_t count = 0;
// Check if ticker is enabled, currently not "ticking" and also catch the millis() overflow
if (conf.buzzer_tick > 0 && (start_millis - last_tick > conf.buzzer_tick || start_millis < last_tick)) {
if (count >= TICK_RATE - 1) { // Only click at every 10th count
tone(BUZZER_PIN, BUZZER_FREQ, conf.buzzer_tick); // Worse at higher cps
last_tick = start_millis;
count = 0;
} else {
count++;
}
}
uint16_t mean = 0;