prepare for actual work

.gitignore

@@ -1,4 +1,6 @@
 .directory
+.cache
 
 sensor/build
 sensor/sensor.*
+sensor/compile_commands.json

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "sensor/v-usb"]
 	path = sensor/v-usb
 	url = https://github.com/obdev/v-usb
+[submodule "sensor/micronucleus"]
+	path = sensor/micronucleus
+	url = https://github.com/micronucleus/micronucleus

COPYING

@@ -0,0 +1,674 @@
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+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
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+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1 +1,22 @@
 # AutoBrightness
+
+
+
+## License
+
+The firmware of this project is licensed as GPLv3.
+A copy of the license can be found in `COPYING`.
+
+It uses [V-USB](https://github.com/obdev/v-usb), and is based on their example code.
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    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 General Public License for more details.
+
+    See <http://www.gnu.org/licenses/>.

sensor/Makefile

@@ -80,7 +80,7 @@ OBJDIR = build
 
 # List C source files here. (C dependencies are automatically generated.)
 SRC = v-usb/usbdrv/usbdrv.c v-usb/usbdrv/oddebug.c
-SRC += src/main.c
+SRC += src/main.c src/adc.c src/usb.c
 
 
 # List C++ source files here. (C dependencies are automatically generated.)

sensor/include/adc.h

@@ -0,0 +1,24 @@
+/*
+ * adc.h
+ *
+ * Copyright (c) 2024 Thomas Buck (thomas@xythobuz.de)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * See <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ADC_H__
+#define __ADC_H__
+
+void adcInit(void);
+
+#endif // __ADC_H__

sensor/include/usbconfig.h

@@ -241,8 +241,8 @@ section at the end of this file).
 #define USB_CFG_DEVICE_VERSION  0x00, 0x01
 /* Version number of the device: Minor number first, then major number.
  */
-#define USB_CFG_VENDOR_NAME     'o', 'b', 'd', 'e', 'v', '.', 'a', 't'
-#define USB_CFG_VENDOR_NAME_LEN 8
+#define USB_CFG_VENDOR_NAME     'x', 'y', 't', 'h', 'o', 'b', 'u', 'z', '.', 'd', 'e'
+#define USB_CFG_VENDOR_NAME_LEN 11
 /* These two values define the vendor name returned by the USB device. The name
  * must be given as a list of characters under single quotes. The characters
  * are interpreted as Unicode (UTF-16) entities.
@@ -251,8 +251,8 @@ section at the end of this file).
  * obdev's free shared VID/PID pair. See the file USB-IDs-for-free.txt for
  * details.
  */
-#define USB_CFG_DEVICE_NAME     'T', 'e', 'm', 'p', 'l', 'a', 't', 'e'
-#define USB_CFG_DEVICE_NAME_LEN 8
+#define USB_CFG_DEVICE_NAME     'A', 'u', 't', 'o', 'B', 'r', 'i', 'g', 'h', 't', 'n', 'e', 's', 's'
+#define USB_CFG_DEVICE_NAME_LEN 14
 /* Same as above for the device name. If you don't want a device name, undefine
  * the macros. See the file USB-IDs-for-free.txt before you assign a name if
  * you use a shared VID/PID.

sensor/micronucleus

@@ -0,0 +1 @@
+Subproject commit a30afe607c3266b3244aa4fe14f9c98f869ae4c5

sensor/src/adc.c

@@ -0,0 +1,26 @@
+/*
+ * adc.c
+ *
+ * Copyright (c) 2024 Thomas Buck (thomas@xythobuz.de)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * See <http://www.gnu.org/licenses/>.
+ */
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#include "adc.h"
+
+void adcInit(void) {
+
+}

sensor/src/main.c

@@ -1,24 +1,39 @@
+/*
+ * main.c
+ *
+ * Copyright (c) 2024 Thomas Buck (thomas@xythobuz.de)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * See <http://www.gnu.org/licenses/>.
+ */
 
 #include <avr/io.h>
 #include <avr/interrupt.h>
 #include <avr/wdt.h>
 #include <util/delay.h>
 
+#include "adc.h"
 #include "usbdrv.h"
 
-usbMsgLen_t usbFunctionSetup(uchar data[8])
-{
-    return 0;   /* default for not implemented requests: return no data back to host */
-}
-
 int __attribute__((noreturn)) main(void) {
     wdt_enable(WDTO_1S);
+    wdt_reset();
 
+    adcInit();
     usbInit();
 
-    usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */
+    usbDeviceDisconnect(); // enforce re-enumeration, do this while interrupts are disabled!
     wdt_reset();
-    _delay_ms(255); /* fake USB disconnect for > 250 ms */
+    _delay_ms(255); // fake USB disconnect for > 250 ms
     usbDeviceConnect();
 
     sei();

sensor/src/usb.c

@@ -0,0 +1,23 @@
+/*
+ * usb.c
+ *
+ * Copyright (c) 2024 Thomas Buck (thomas@xythobuz.de)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * See <http://www.gnu.org/licenses/>.
+ */
+
+#include "usbdrv.h"
+
+usbMsgLen_t usbFunctionSetup(uchar data[8]) {
+    return 0;   /* default for not implemented requests: return no data back to host */
+}