From f0fdd4b91cd4dded9e029a7a3a8b6a158d721a30 Mon Sep 17 00:00:00 2001
From: bnewbold <bnewbold@robocracy.org>
Date: Thu, 22 Nov 2012 00:21:11 +0100
Subject: add Nov 22nd notes and scripts

---
 test_20121121/entropy_hex.cpp | 63 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 test_20121121/entropy_hex.cpp

(limited to 'test_20121121/entropy_hex.cpp')

diff --git a/test_20121121/entropy_hex.cpp b/test_20121121/entropy_hex.cpp
new file mode 100644
index 0000000..7fc627c
--- /dev/null
+++ b/test_20121121/entropy_hex.cpp
@@ -0,0 +1,63 @@
+// Sample main.cpp file. Blinks the built-in LED, sends a message out
+// USART2, and turns on PWM on pin 2.
+
+#include "wirish.h"
+
+int inByte;                     // Byte read from Serial1
+
+void printHex(char val);
+
+void setup() {
+    // Initialize Serial1
+    //Serial1.begin(9600);
+    //pinMode(37, INPUT_FLOATING);
+    pinMode(37, INPUT_PULLDOWN);
+    //pinMode(37, INPUT_PULLUP);
+    pinMode(BOARD_LED_PIN, OUTPUT);
+}
+
+void loop() {
+
+    togglePin(BOARD_LED_PIN);
+
+    for (int i=0; i < 78/2; i++) {
+        inByte = 0;
+        for (int j=0; j < 8; j++) {
+            delay(1);
+            inByte |= digitalRead(37) << j;
+        }
+        printHex(inByte);
+    }
+    SerialUSB.println();
+}
+
+void printHex(char val) {
+    char u = (val & 0xF0) >> 4;
+    char l = (val & 0x0F);
+    if(u <= 9) {
+        SerialUSB.write('0'+u);
+    } else {        
+        SerialUSB.write('A'+u-10);
+    }
+    if(l <= 9) {
+        SerialUSB.write('0'+l);
+    } else {        
+        SerialUSB.write('A'+l-10);
+    }
+}
+
+// Force init to be called *first*, i.e. before static object allocation.
+// Otherwise, statically allocated objects that need libmaple may fail.
+__attribute__((constructor)) void premain() {
+    init();
+}
+
+int main(void) {
+    setup();
+
+    while (true) {
+        loop();
+    }
+
+    return 0;
+}
-- 
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