Initial commit

6 files changed, 278 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..39b8314
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+.*
+*.o
+
+!.gitignore
+!.gitmodules
+
+turris-lcd
+build
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..8f42eb3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "liblcd"]
+	path = liblcd
+	url = https://github.com/Cynerd/liquidcrystal-i2c.git
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9c2cc47
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,98 @@
+MAKEFLAGS += --no-builtin-rules
+
+# This variable can be overwritten to show executed commands
+Q ?= @
+
+# Default output path. This is used when output (writable) directory is different
+# than project directory. You shouldn't be setting it by hand, but it is used in
+# external Makefiles.
+O ?= .
+
+# Load configuration
+-include $(O)/.config.mk
+
+.PHONY: all
+all: $(O)/turris-lcd
+
+ifeq ($(DEBUG),yes)
+CFLAGS += -ggdb -DDEBUG
+endif
+CFLAGS += -Wall
+CFLAGS += -Iliblcd -include $(O)/build/config.h
+
+# Apply CPREFIX
+CXX:=$(CPREFIX)$(CXX)
+
+### Source files list ###########################
+SRC = turris-lcd.cpp
+### End of source files list ####################
+
+CSRC = $(patsubst %,src/%,$(filter %.cpp,$(SRC)))
+
+OBJ = $(patsubst src/%.cpp,$(O)/build/%.o,$(CSRC))
+DEP = $(patsubst src/%.cpp,$(O)/build/%.d,$(CSRC))
+
+.PHONY: help
+help:
+	@echo "General extendable macro language make targets:"
+	@echo " turris-lcd  - Build geml executable"
+	@echo " help        - Prints this text help."
+	@echo " clean       - Cleans builded files"
+	@echo " prune       - Same as clean but also removes configuration."
+	@echo "Some enviroment variables to be defined:"
+	@echo " Q             - Define emty to show executed commands"
+
+# Cleaning
+.PHONY: clean
+clean::
+	@echo " CLEAN build"
+	$(Q)$(RM) -r $(O)/build
+	$(Q)$(RM) $(O)/.config.mk
+	@echo " CLEAN turris-lcd"
+	$(Q)$(RM) $(O)/turris-lcd
+.PHONY: prune
+prune:: clean
+	@echo " CLEAN configuration"
+	$(Q)$(RM) $(O)/.config $(O)/.config.mk 
+	@echo " CLEAN liblcd"
+	$(Q)$(MAKE) -C liblcd clean
+
+## Building targets ##
+ifeq (,$(filter clean prune help \
+	  ,$(MAKECMDGOALS))) # Ignore build targets if goal is not building
+
+ifeq ($(DEBUG),yes)
+-include $(DEP) # If developing, use dependencies from source files
+.PHONY: dependency dep
+dependency dep:: $(DEP)
+$(DEP): $(O)/build/%.d: src/%.cpp
+	@mkdir -p "$(@D)"
+	@echo " DEP   $@"
+	$(Q)$(CXX) -MM -MG -MT '$*.o $@' $(CFLAGS) $< -MF $@
+endif # DEBUG
+
+$(O)/turris-lcd: $(OBJ) liblcd/libliquidcrystali2c.a
+	@echo " LD    $@"
+	$(Q)$(CXX) $(LDFLAGS) $^ -o $@
+
+$(OBJ): $(O)/build/%.o: src/%.cpp $(O)/build/config.h
+	@mkdir -p "$(@D)"
+	@echo " CXX   $@"
+	$(Q)$(CXX) -c $(CFLAGS) $< -o $@
+
+$(O)/build/config.h: $(O)/.config
+	@mkdir -p "$(@D)"
+	@echo " CONF  $@"
+	$(Q)$(O)/configure --op-h > $@
+
+liblcd/libliquidcrystali2c.a:
+	$(Q)$(MAKE) -C liblcd static
+endif
+
+## Configuation files ##
+$(O)/.config:
+	$(error Please run configure script first)
+
+$(O)/.config.mk: $(O)/.config
+	@echo " CONF  $@"
+	$(Q)$(O)/configure --op-makefile > $@
diff --git a/configure b/configure
new file mode 100755
index 0000000..f10ef90
--- /dev/null
+++ b/configure
@@ -0,0 +1,152 @@
+#!/bin/sh
+# vim:ft=sh:ts=4:sw=4:noexpandtab
+set -e
+
+# Configured variables #####################################################
+# Described in following format:
+# name:initial value:type:if exported to makefile:if exported to C header
+# Where type can be just a string (in C in "") or plain. None implies plain.
+CNFS="CBUILD:::F:F
+CHOST:::F:F
+DEBUG:no::T:F
+CPREFIX:::T:F
+CCX:g++::T:F
+CFLAGS:::T:F
+LFLAGS:::T:F"
+############################################################################
+# TODO add options to fine tune installation directories
+
+print_help() {
+	echo "Usage: ./configure [OPTION]..."
+	echo "GEML configuration script. Execute this script to configure project"
+	echo "and prepare it for building."
+	echo
+	echo "  --help, -h              Give this help list"
+	echo "  --debug, -d             Enable development features."
+	echo "  --release, -r           Disable development features for project."
+	echo "  --dep-check             Force depencency check."
+	echo "  --build=CBUILD          System compiler prefix on which project is"
+	echo "                          built."
+	echo "  --host=CHOST            Compiler prefix for system program and"
+	echo "                          libraries will run on."
+	echo
+	echo "Environment variables:"
+	echo "  CPREFIX                 Compilation tools prefix."
+	echo "  CXX                     C++ compiler command."
+	echo "  CFLAGS                  C++ compiler flags."
+	echo "  LDFLAGS                 C++ Linker flags."
+}
+
+CONFIG_FILE=.config
+CONFIGURED_FILE=.configured # TODO
+
+# Backup variables from environment
+ENVVARS="CPREFIX CXX CFLAGS LDFLAGS"
+for E in $ENVVARS; do
+	eval "[ -n \"\${$E+y}\" ]" && eval "BACKUP_$E=\$$E"
+done
+
+# Load default configuration if variable not set from environment
+eval `echo "$CNFS" | sed -ne 's/^\([^:]*\):\([^:]*\).*$/\1=\2/p'`
+
+# Load existing configuration
+if [ -f "$CONFIG_FILE" ]; then
+	. ./"$CONFIG_FILE"
+fi
+
+# Functions used for arguments parsing. Handles both --*=* and --* * arguments.
+# First arguments is option name. Second is $1 and third $2
+set_options() {
+	if [[ "$2" == --*=* ]]; then
+		VAL="$(echo "$2" | sed 's/--[^=]*=//')"
+	else
+		VAL="$3"
+	fi
+}
+
+# Requested operation.
+# c - Configure, default configuration behavior
+# m - Prints output for Makefile
+# h - Prints C header file
+OP=c
+
+# Parse arguments
+while [ "$#" -gt 0 ]; do
+	case $1 in
+		-h|--help)
+			print_help
+			exit 0
+			;;
+		-d|--debug)
+			DEBUG=yes
+			;;
+		-r|--release)
+			DEBUG=no
+			;;
+		--op-makefile)
+			OP=m
+			;;
+		--op-h)
+			OP=h
+			;;
+		*)
+			echo Warning: Unknown option $1 1>&2
+			;;
+	esac
+	shift
+done
+
+# Recover from enviroment variables
+for E in $ENVVARS; do
+	eval "[ -n \"\${BACKUP_$E+y}\" ]" && eval "$E=\$BACKUP_$E"
+done
+
+# Basically save configuration to file
+configure() {
+	echo "# linux-lcd configuration file" > "$CONFIG_FILE"
+	echo "# Please do not edit this file directly." >> "$CONFIG_FILE"
+	echo "$CNFS" | while read L; do
+		NAME=`echo "$L" | grep -o -E '^[^:]*'`
+		eval "VALUE=\$$NAME"
+		echo "$NAME=$VALUE" >> "$CONFIG_FILE"
+	done
+	echo "Configuration written to \"$CONFIG_FILE\""
+}
+
+makefile() {
+	echo "$CNFS" | while read L; do
+		if [ `echo $L | awk -F ':' '{ print $4 }'` != "T" ]; then
+			continue
+		fi
+		NAME=`echo "$L" | grep -o -E '^[^:]*'`
+		eval "VALUE=\$$NAME"
+		echo "$NAME := $VALUE"
+	done
+}
+
+cheader() {
+	echo "$CNFS" | while read L; do
+		if [ `echo $L | awk -F ':' '{ print $5 }'` != "T" ]; then
+			continue
+		fi
+		NAME=`echo "$L" | grep -o -E '^[^:]*'`
+		eval "VALUE=\$$NAME"
+		if [ "`echo $L | awk -F ':' '{ print $3 }'`" = "string" ]; then
+			echo "#define $NAME \"$VALUE\""
+		else
+			echo "#define $NAME $VALUE"
+		fi
+	done
+}
+
+case $OP in
+	c)
+		configure
+		;;
+	m)
+		makefile
+		;;
+	h)
+		cheader
+		;;
+esac
diff --git a/liblcd b/liblcd
new file mode 160000
+Subproject 9d2a982638e8b84fa335e29b8fe7fdf17ea8aed
diff --git a/src/turris-lcd.cpp b/src/turris-lcd.cpp
new file mode 100644
index 0000000..d9509e0
--- /dev/null
+++ b/src/turris-lcd.cpp
@@ -0,0 +1,17 @@
+#include <iostream>
+#include <LiquidCrystal_I2C.h>
+
+using namespace std;
+
+int main(int argc, char *argv[]) {
+	// Initialize LCD
+	LiquidCrystal_I2C lcd("/dev/i2c-2", 0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
+	lcd.begin(20, 4);
+
+	lcd.on();
+	lcd.clear();
+
+	lcd.print("Turris Omnia");
+
+	return 0;
+}