9 files changed, 155 insertions, 16 deletions
diff --git a/src/tempmodule/configuration.c b/src/tempmodule/configuration.c
new file mode 100644
index 0000000..76acde8
--- /dev/null
+++ b/src/tempmodule/configuration.c
@@ -0,0 +1,33 @@
+/*
+ * Hot Beverage Companion – configuration data
+ *
+ * Copyright (C) 2018 Gediminas Jakutis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+/* We want the padding data to be detectible in the binary
+ * so we could find out the boundries of inner workings.
+ * We also want to detect byte order from the padding.
+ */
+
+#include "datatypes.h"
+volatile const struct configuration configuration = {{{
+	PADDING_START,
+	"ssid",				/* ssid */
+	"password",			/* password */
+	{3430, 3330, 3230, 3130},	/* calibration */
+	PADDING_END
+}}};
diff --git a/src/tempmodule/configuration.h b/src/tempmodule/configuration.h
new file mode 100644
index 0000000..dfe1264
--- /dev/null
+++ b/src/tempmodule/configuration.h
@@ -0,0 +1,28 @@
+/*
+ * Hot Beverage Companion – configuration data
+ *
+ * Copyright (C) 2018 Gediminas Jakutis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef CONFIGURATION_INCLUDED
+#define CONFIGURATION_INCLUDED
+
+#include "datatypes.h"
+
+extern volatile const struct configuration configuration;
+
+#endif /* CONFIGURATION_INCLUDED */
diff --git a/src/tempmodule/datatypes.h b/src/tempmodule/datatypes.h
new file mode 120000
index 0000000..3a91016
--- /dev/null
+++ b/src/tempmodule/datatypes.h
@@ -0,0 +1 @@
+../../include/datatypes.h
+\ No newline at end of file
diff --git a/src/tempmodule/indicator.c b/src/tempmodule/indicator.c
index 2968958..16df495 100644
--- a/src/tempmodule/indicator.c
+++ b/src/tempmodule/indicator.c
@@ -19,6 +19,8 @@
  */
 
 #include "indicator.h"
+#include "configuration.h"
+#include "volatile_ops.h"
 
 #define HIGH 1
 #define LOW 0
@@ -38,8 +40,9 @@ static const unsigned int greenled = 4;	/* D2 */
 static const unsigned int blueled = 14;	/* D5 */
 
 static void indicator_set_state(unsigned int red, unsigned int green, unsigned int blue);
+static void indicator_calibrate(int const * const calibration);
 
-void indicator_init(int temp, unsigned int const * const calibration)
+void indicator_init(int temp)
 {
 	static const int default_calibration[] = {3430, 3330, 3230, 3130};
 
@@ -49,11 +52,7 @@ void indicator_init(int temp, unsigned int const * const calibration)
 
 	state.current_temp = temp;
 
-	if (calibration) {
-		indicator_calibrate(calibration);
-	} else {
-		indicator_calibrate(default_calibration);
-	}
+	indicator_calibrate(configuration.calibration);
 
 }
 
@@ -79,9 +78,9 @@ void indicator_update(const int temp, const unsigned int on)
 	}
 }
 
-void indicator_calibrate(int const * const calibration)
+static void indicator_calibrate(int const * const calibration)
 {
-	memcpy(state.calibration, calibration, sizeof(state.calibration));
+	volatile_memcpy(state.calibration, calibration, sizeof(state.calibration));
 	indicator_update(state.current_temp, 1);
 }
 
diff --git a/src/tempmodule/indicator.h b/src/tempmodule/indicator.h
index 99f4e1c..23ac87d 100644
--- a/src/tempmodule/indicator.h
+++ b/src/tempmodule/indicator.h
@@ -25,9 +25,8 @@
 extern "C" {
 #endif
 
-void indicator_init(int temp, unsigned int const * const calibration);
+void indicator_init(int temp);
 void indicator_update(const int temp, const unsigned int on);
-void indicator_calibrate(int const * const calibration);
 
 #ifdef __cplusplus
 }
diff --git a/src/tempmodule/main.ino b/src/tempmodule/main.ino
index 29ebc11..914b3ff 100644
--- a/src/tempmodule/main.ino
+++ b/src/tempmodule/main.ino
@@ -25,6 +25,8 @@
 #include <limits.h>
 #include "indicator.h"
 #include "temperature.h"
+#include "configuration.h"
+#include "volatile_ops.h"
 
 #define arrsize(a) (sizeof(a)/sizeof(*a))
 
@@ -69,7 +71,7 @@ void setup(void)
 	pinMode(thermistorvcc, OUTPUT);
 	digitalWrite(thermistorvcc, LOW);
 
-	indicator_init(0, NULL);
+	indicator_init(0);
 
 	WiFi.mode(WIFI_OFF);
 	WiFi.forceSleepBegin();
@@ -90,12 +92,15 @@ void setup(void)
 
 void loop(void)
 {
-	static const char * const ssid = "SSID";
-	static const char * const password = "password";
+	char ssid[32];
+	char password[32];
 	static unsigned int ticker = 0;
 	short int data[3];
 	size_t i;
 
+	volatile_memcpy(ssid, configuration.ssid, sizeof(configuration.ssid));
+	volatile_memcpy(password, configuration.password, sizeof(configuration.ssid));
+
 	udp_init_packet(ip, port);
 
 	if (wifidesired && !wifistate) {
@@ -193,7 +198,6 @@ static void wifi_disconnect(void)
 	wifiled_off();
 	Udp.stop();
 	WiFi.disconnect(1);
-	WiFi.mode(WIFI_OFF);
 	WiFi.forceSleepBegin();
 	yield();
 	wifistate = 0;
diff --git a/src/tempmodule/meson.build b/src/tempmodule/meson.build
index e974884..b2c88b9 100644
--- a/src/tempmodule/meson.build
+++ b/src/tempmodule/meson.build
@@ -1,3 +1,4 @@
+fw_filename = 'fw.bin'
 if get_option('fwbuild')
 	espmake = find_program('espmake')
 
@@ -5,9 +6,9 @@ if get_option('fwbuild')
 	fw_filenames = ['main.ino', 'indicator.c', 'temperature.c', 'indicator.h', 'temperature.h']
 	fw_sources = files(fw_filenames)
 	fw = custom_target('fw',
-			output : 'fw.bin',
+			output : fw_filename,
 			input : fw_sources,
-			command : [espmake, '-C', sourcedir, '&&', 'cp', '/tmp/mkESP/main_d1_mini/main.bin', '@OUTDIR@/fw.bin'])
+			command : [espmake, '-C', sourcedir, '&&', 'cp', '/tmp/mkESP/main_d1_mini/main.bin', '@OUTDIR@/' + fw_filename], install : true, install_dir : resource_dir)
 
 	if get_option('fwflash')
 		esptool = find_program('esptool.py')
diff --git a/src/tempmodule/volatile_ops.c b/src/tempmodule/volatile_ops.c
new file mode 100644
index 0000000..432955a
--- /dev/null
+++ b/src/tempmodule/volatile_ops.c
@@ -0,0 +1,38 @@
+/*
+ * Hot Beverage Companion – volatile data ops
+ *
+ * Copyright (C) 2018 Gediminas Jakutis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include "volatile_ops.h"
+
+void *volatile_memcpy(void *dest, volatile const void * const src, size_t n)
+{
+	char *d;
+	volatile const char *s;
+
+	if (!n) {
+		return dest;
+	}
+
+	d = dest;
+	s = src;
+
+	while (n--) {
+		d[n] = s[n];
+	}
+}
diff --git a/src/tempmodule/volatile_ops.h b/src/tempmodule/volatile_ops.h
new file mode 100644
index 0000000..7a165b9
--- /dev/null
+++ b/src/tempmodule/volatile_ops.h
@@ -0,0 +1,36 @@
+/*
+ * Hot Beverage Companion – volatile data ops
+ *
+ * Copyright (C) 2018 Gediminas Jakutis
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; version 2.1
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef VOLATILE_OPS_INCLUDED
+#define VOLATILE_OPS_INCLUDED
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void *volatile_memcpy(void *dest, volatile const void * const src, size_t n);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* VOLATILE_OPS_INCLUDED */