From e62be3b12d3c94d709a77d89f52c31f7c4ac475d Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 4 Dec 2021 22:22:47 -0800
Subject: Initial commit.

---
 arduino/config.cc | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100755 arduino/config.cc

(limited to 'arduino/config.cc')

diff --git a/arduino/config.cc b/arduino/config.cc
new file mode 100755
index 0000000..a46c663
--- /dev/null
+++ b/arduino/config.cc
@@ -0,0 +1,61 @@
+#include "config.h"
+
+#include <Arduino.h>
+#include <EEPROM.h>
+
+#define ROM_INITIALISED 17
+
+#define DEFAULT_SIGNALS_PER_RPM 133
+#define DEFAULT_START_DELAY_MILLIS 1000
+#define DEFAULT_RPM_COUNT 5000
+
+static Config config;
+
+int writeLong (int address, unsigned long val)
+{
+    const char* p = (char*) &val;
+    int i = 0;
+    for (; i < sizeof(val); ++i, ++p)
+    {
+        EEPROM.write(address + i, *p);
+    }
+    return address + i;
+}
+
+int readLong (int address, unsigned long& val)
+{
+    char* p = (char*) &val;
+    int i = 0;
+    for (; i < sizeof(val); ++i, ++p)
+    {
+        *p = EEPROM.read(address + i);
+    }
+    return address + i;
+}
+
+const Config& readConfig ()
+{
+    byte initialised = EEPROM.read(0);
+    if (initialised != ROM_INITIALISED)
+    {
+        int addr = 1;
+        addr = writeLong(addr, DEFAULT_START_DELAY_MILLIS);
+        addr = writeLong(addr, DEFAULT_RPM_COUNT);
+        addr = writeLong(addr, DEFAULT_SIGNALS_PER_RPM);
+        EEPROM.write(0, ROM_INITIALISED);
+    }
+    int addr = 1;
+    addr = readLong(addr, config.startDelay);
+    addr = readLong(addr, config.rpmCount);
+    addr = readLong(addr, config.signalsPerRPM);
+    return config;
+}
+
+void writeConfig (const Config& config)
+{
+    int addr = 1;
+    addr = writeLong(addr, config.startDelay);
+    addr = writeLong(addr, config.rpmCount);
+    addr = writeLong(addr, config.signalsPerRPM);
+    EEPROM.write(0, ROM_INITIALISED);
+}
-- 
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