Merge pull request #1940 from caternuson/trng_code

Add code for Trinkey QT2040 TRNG

Author: ladyada

Trinkey_QT2040_TRNG_Gadget/python/trng_read_csv.py

@@ -0,0 +1,14 @@
+import serial
+
+# open serial port
+ss = serial.Serial("/dev/ttyACM0")
+
+# read string
+_ = ss.readline() # first read may be incomplete, just toss it
+raw_string = ss.readline().strip().decode()
+
+# create list of integers
+rnd_ints = [int(x) for x in raw_string.split(',')]
+
+# print them
+print(rnd_ints)

Trinkey_QT2040_TRNG_Gadget/python/trng_read_json.py

@@ -0,0 +1,15 @@
+import json
+import serial
+
+# open serial port
+ss = serial.Serial("/dev/ttyACM0")
+
+# read string
+_ = ss.readline() # first read may be incomplete, just toss it
+raw_string = ss.readline().strip().decode()
+
+# load JSON
+json_data = json.loads(raw_string)
+
+# print data
+print(json_data['trng'])

Trinkey_QT2040_TRNG_Gadget/python/trng_read_raw.py

@@ -0,0 +1,13 @@
+import serial
+
+# how many bytes to read?
+TRNG_SIZE = 4
+
+# open serial port
+ss = serial.Serial("/dev/ttyACM0")
+
+# read raw bytes
+raw_bytes = ss.read(TRNG_SIZE)
+
+# print them
+print(raw_bytes)

Trinkey_QT2040_TRNG_Gadget/trinkey_rp2040_trust_m_trng/.qt2040_trinkey.test.only

@@ -0,0 +1 @@
+

Trinkey_QT2040_TRNG_Gadget/trinkey_rp2040_trust_m_trng/trinkey_rp2040_trust_m_trng.ino

@@ -0,0 +1,76 @@
+#include <Adafruit_NeoPixel.h>
+#include "OPTIGATrustM.h"
+
+//--| User Config |-----------------------------------------------
+#define TRNG_FORMAT   2         // 0=raw, 1=CSV, 2=JSON
+#define TRNG_LENGTH   8         // random number length in bytes, 8 to 256
+#define TRNG_RATE     100       // generate new number ever X ms
+#define BEAT_RATE     1000      // neopixel heart beat rate in ms, 0=none
+#define BEAT_COLOR    0xADAF00  // neopixel heart beat color
+//----------------------------------------------------------------
+
+uint8_t trng[TRNG_LENGTH];
+int current_time, last_trng, last_beat;
+
+Adafruit_NeoPixel neopixel(1, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);
+
+void setup() 
+{
+  Serial.begin(115200); // USB CDC doesn't really care about baud rate
+  
+  if (trustM.begin()) {
+    Serial.println("Failed to initialize Trust M.");
+    neoPanic();
+  }
+
+  neopixel.begin();
+  neopixel.fill(0);
+  neopixel.show();
+
+  last_trng = last_beat = millis();
+}
+
+void loop()
+{
+  current_time = millis();
+
+  if (current_time - last_trng > TRNG_RATE) {
+    trustM.getRandom(TRNG_LENGTH, trng);
+    sendTRNG();
+    last_trng = current_time;   
+  }
+
+  if ((BEAT_RATE) && (current_time - last_beat > BEAT_RATE)) {
+    if (neopixel.getPixelColor(0)) {
+      neopixel.fill(0);
+    } else {
+      neopixel.fill(BEAT_COLOR);
+    }
+    neopixel.show();
+    last_beat = current_time;
+  }
+}
+
+void sendTRNG() {
+  if (TRNG_FORMAT) {
+    // formatted string output (CSV, JSON)
+    if (TRNG_FORMAT==2) Serial.print("{\"trng\": \"");
+    for (uint16_t i=0; i<TRNG_LENGTH; i++) {
+      Serial.print(trng[i]);
+      if (i != TRNG_LENGTH - 1) Serial.print(", "); 
+    }
+    if (TRNG_FORMAT==2) Serial.print("\"}");
+    Serial.println();
+  } else {
+    // raw output (bytes)
+    Serial.write(trng, TRNG_LENGTH);
+  }
+}
+
+
+void neoPanic() {
+  while (1) {
+    neopixel.fill(0xFF0000); neopixel.show(); delay(100);
+    neopixel.fill(0x000000); neopixel.show(); delay(100);
+  }
+}