Initial Upload

Author: kevinkessler

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Custom for Visual Studio
+*.cs     diff=csharp
+*.sln    merge=union
+*.csproj merge=union
+*.vbproj merge=union
+*.fsproj merge=union
+*.dbproj merge=union
+
+# Standard to msysgit
+*.doc	 diff=astextplain
+*.DOC	 diff=astextplain
+*.docx diff=astextplain
+*.DOCX diff=astextplain
+*.dot  diff=astextplain
+*.DOT  diff=astextplain
+*.pdf  diff=astextplain
+*.PDF	 diff=astextplain
+*.rtf	 diff=astextplain
+*.RTF	 diff=astextplain

.gitignore

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+#################
+## Eclipse
+#################
+
+*.pydevproject
+.project
+.metadata
+bin/
+tmp/
+*.tmp
+*.bak
+*.swp
+*~.nib
+local.properties
+.classpath
+.settings/
+.loadpath
+
+# External tool builders
+.externalToolBuilders/
+
+# Locally stored "Eclipse launch configurations"
+*.launch
+
+# CDT-specific
+.cproject
+
+# PDT-specific
+.buildpath
+
+
+#################
+## Visual Studio
+#################
+
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+
+# User-specific files
+*.suo
+*.user
+*.sln.docstates
+
+# Build results
+
+[Dd]ebug/
+[Rr]elease/
+x64/
+build/
+[Bb]in/
+[Oo]bj/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+*_i.c
+*_p.c
+*.ilk
+*.meta
+*.obj
+*.pch
+*.pdb
+*.pgc
+*.pgd
+*.rsp
+*.sbr
+*.tlb
+*.tli
+*.tlh
+*.tmp
+*.tmp_proj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.log
+*.scc
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opensdf
+*.sdf
+*.cachefile
+
+# Visual Studio profiler
+*.psess
+*.vsp
+*.vspx
+
+# Guidance Automation Toolkit
+*.gpState
+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+
+# TeamCity is a build add-in
+_TeamCity*
+
+# DotCover is a Code Coverage Tool
+*.dotCover
+
+# NCrunch
+*.ncrunch*
+.*crunch*.local.xml
+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
+DocProject/buildhelp/
+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
+publish/
+
+# Publish Web Output
+*.Publish.xml
+*.pubxml
+
+# NuGet Packages Directory
+## TODO: If you have NuGet Package Restore enabled, uncomment the next line
+#packages/
+
+# Windows Azure Build Output
+csx
+*.build.csdef
+
+# Windows Store app package directory
+AppPackages/
+
+# Others
+sql/
+*.Cache
+ClientBin/
+[Ss]tyle[Cc]op.*
+~$*
+*~
+*.dbmdl
+*.[Pp]ublish.xml
+*.pfx
+*.publishsettings
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file to a newer
+# Visual Studio version. Backup files are not needed, because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+
+# SQL Server files
+App_Data/*.mdf
+App_Data/*.ldf
+
+#############
+## Windows detritus
+#############
+
+# Windows image file caches
+Thumbs.db
+ehthumbs.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Mac crap
+.DS_Store
+
+
+#############
+## Python
+#############
+
+*.py[co]
+
+# Packages
+*.egg
+*.egg-info
+dist/
+build/
+eggs/
+parts/
+var/
+sdist/
+develop-eggs/
+.installed.cfg
+
+# Installer logs
+pip-log.txt
+
+# Unit test / coverage reports
+.coverage
+.tox
+
+#Translations
+*.mo
+
+#Mr Developer
+.mr.developer.cfg

Spektrum.c

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+/*
+ * Spektrum.c
+ *
+ *  Created on: Jan 15, 2014
+ *      Author: Kevin
+ */
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <string.h>
+#include <util/twi.h>
+
+#define MSG_LENGTH 16
+
+void TWISlaveInit();
+
+
+extern uint8_t alt_buf[16];
+extern uint8_t cur_buf[16];
+extern uint8_t pwr_buf[16];
+extern uint8_t air_buf[16];
+extern uint8_t gps_buf16[16];
+extern uint8_t gps_buf17[16];
+
+uint8_t addresses[]={0x03,0x0A,0x11,0x12,0x16,0x17,0x00};
+uint8_t initializing=1;
+uint8_t addrIdx=0;
+uint8_t twi_buf[17];
+volatile uint8_t twi_buf_ptr=0;
+volatile uint8_t addrCount=0;
+
+void TWISlaveInit()
+{
+	TWAR=addresses[0]<<1;
+
+	TWSR=0;
+	TWBR=0;
+
+	TWCR=(1<<TWEN)|(1<<TWEA)|(1<<TWIE);
+
+
+	for(int n=0;n<16;n++)
+		twi_buf[n]=alt_buf[n];
+	sei();
+
+
+}
+
+ISR(TWI_vect)
+{
+
+	uint8_t dummy;
+	switch (TW_STATUS)
+	{
+		case TW_SR_SLA_ACK:
+			dummy=TWDR;
+			TWCR |= (1<<TWINT);
+			break;
+		case TW_ST_SLA_ACK:
+			if(initializing)
+			{
+				addrCount++;
+				if(addrCount==2)
+				{
+					addrCount=0;
+					if(addresses[++addrIdx]==0)
+					{
+						TWAR=addresses[0]<<1;
+						initializing=0;
+					}
+					else
+						TWAR=addresses[addrIdx]<<1;
+				}
+			}
+			else
+				TWAMR=0xFF;
+
+			uint8_t funct=TWDR>>1;
+			switch(funct)
+			{
+			case 0x03:
+				memcpy(twi_buf,cur_buf,16);
+				break;
+			case 0x0A:
+				memcpy(twi_buf,pwr_buf,16);
+				break;
+			case 0x11:
+				memcpy(twi_buf,air_buf,16);
+				break;
+			case 0x12:
+				memcpy(twi_buf,alt_buf,16);
+				break;
+			case 0x16:
+				memcpy(twi_buf,gps_buf16,16);
+				break;
+			case 0x17:
+				memcpy(twi_buf,gps_buf17,16);
+				break;
+			default:
+				for (int n=0;n<16;n++)
+					twi_buf[n]=0;
+				break;
+			}
+		case TW_ST_DATA_ACK:
+			TWDR=twi_buf[twi_buf_ptr++];
+			if(twi_buf_ptr==MSG_LENGTH)
+			{
+				twi_buf_ptr=0;
+				TWCR = (1<<TWINT) | (1<<TWEN) | (0<<TWEA) | (1<<TWIE);
+			}
+			else
+			{
+				TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA) | (1<<TWIE);
+			}
+			break;
+		case TW_ST_LAST_DATA:
+		case TW_ST_DATA_NACK:
+				TWCR=(1<<TWEN)|(1<<TWEA)|(1<<TWINT)| (1<<TWIE);
+			break;
+		default:
+			TWCR|=(1<<TWINT);
+
+			break;
+	}
+
+	sei();
+
+}