Merge branch 'release-v0.55'

Firmware changes:
- Guard configuration structure access to avoid rare event resulting in data loss
- Mark global variables volatile, where accessed between tasks
- Timeout and reset DMA channels on failure
- Introduce smart card start up delay to favor internal processes
- Increased firmware version to v0.55
- Configuration access refactorization for easier data manipulation

Development:
- Import project to Atmel Studio 7
- Allow to build using Makefile
- Add stub for CMake usage
- Remove obsolete code
- Add initial support for stack guard protection

Connected: #98

Tested on:
- macOS 10.15.2
- Linux Fedora 32
- Windows 10 20H2
with:
- libnitrokey 3.6 (Python test suites; skipped on Windows)
- Nitrokey App v1.4 (manual test)
For tests firmware was built using GCC 4.3.3 (AVR_Toolchain_3.0_124), -O0.
Firmware upgrade and downgrade tested on the previous latest firmware.

Test suite was modified to account TOTP#15 slot being disabled.

.gitignore

@@ -0,0 +1,17 @@
+*.bin
+build*
+cmake-build-debug
+*.elf
+*.hex
+*.hex*
+.idea
+.idea/
+*.list
+*.log
+*.o
+*.sha256sum
+*.sig
+*.swp
+*.tar.gz
+tmp
+*.txt

STICK20_GIT-7.atsln

@@ -0,0 +1,22 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Atmel Studio Solution File, Format Version 11.00
+VisualStudioVersion = 14.0.23107.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{54F91283-7BC4-4236-8FF9-10F437C3AD48}") = "STICK20_GIT", "STICK20_GIT.cproj", "{B19EB321-4623-42D6-8259-B5D025DAFC16}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|AVR = Debug|AVR
+		Release|AVR = Release|AVR
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B19EB321-4623-42D6-8259-B5D025DAFC16}.Debug|AVR.ActiveCfg = Debug|AVR
+		{B19EB321-4623-42D6-8259-B5D025DAFC16}.Debug|AVR.Build.0 = Debug|AVR
+		{B19EB321-4623-42D6-8259-B5D025DAFC16}.Release|AVR.ActiveCfg = Release|AVR
+		{B19EB321-4623-42D6-8259-B5D025DAFC16}.Release|AVR.Build.0 = Release|AVR
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

STICK20_GIT.componentinfo.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Store xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="AtmelPackComponentManagement">
+	<ProjectComponents />
+</Store>

src/CCID/USART/ISO7816_ADPU.c

@@ -204,6 +204,9 @@ u8 Text[20];
 
     LockActive_u32 = FALSE;
 
+    // TODO set timeout instead of infinite loop
+    // TODO reorganize this loop to make clear what is the CRITICAL part
+
     // Check lock
     portENTER_CRITICAL ();
     while (0 != USB_CCID_GetLockCounter ())

src/CMakeLists.txt

@@ -1,19 +1,23 @@
 cmake_minimum_required(VERSION 3.9)
 project(nitrokey_storage)
 
-set(CMAKE_C_STANDARD 90)
+set(CMAKE_C_STANDARD 99)
 
 MESSAGE(WARNING "This is only a stub. Not possible to build a firmware with it at the moment.")
 
 # Copied from the AVR32 build log for the further processing
-set(NKDEFINES "-DBOARD=EVK1104 -DFREERTOS_USED")
-set(NKFLAGS "-O0 -fdata-sections -g3 -Wall -c -fmessage-length=0 -mpart=uc3a3256s -ffunction-sections -masm-addr-pseudos")
+set(NKDEFINES -DBOARD=EVK1104 -DFREERTOS_USED)
+set(NKFLAGS -O0 -fdata-sections -g3 -Wall -c -fmessage-length=0 -mpart=uc3a3256s -ffunction-sections -masm-addr-pseudos)
 set(NKCOMPILER avr32-gcc)
-set(NKLINKFLAGS "-nostartfiles -L../src/SOFTWARE_FRAMEWORK/UTILS/LIBS/NEWLIB_ADDONS -L../src/SOFTWARE_FRAMEWORK/BOARDS -Wl,--gc-sections -Wl,-e,_trampoline -T../src/SOFTWARE_FRAMEWORK/UTILS/LINKER_SCRIPTS/AT32UC3A3/256/GCC/link_uc3a3256.lds -mpart=uc3a3256s -Wl,--gc-sections --rodata-writable -Wl,--direct-data -oUSB_MASS.elf -lnewlib_addons-at32ucr2-speed_opt")
+set(NKLINKFLAGS -nostartfiles -L../src/SOFTWARE_FRAMEWORK/UTILS/LIBS/NEWLIB_ADDONS -L../src/SOFTWARE_FRAMEWORK/BOARDS -Wl,--gc-sections -Wl,-e,_trampoline -T../src/SOFTWARE_FRAMEWORK/UTILS/LINKER_SCRIPTS/AT32UC3A3/256/GCC/link_uc3a3256.lds -mpart=uc3a3256s -Wl,--gc-sections --rodata-writable -Wl,--direct-data -oUSB_MASS.elf -lnewlib_addons-at32ucr2-speed_opt)
 
+add_definitions(${NKDEFINES})
+SET(CMAKE_C_COMPILER /home/sz/work/software/as4e-ide/plugins/com.atmel.avr.toolchains.linux.x86_64_3.0.0.201009140852/os/linux/x86_64/bin/avr32-gcc)
 
 include_directories(.)
 
+include_directories(/home/sz/work/software/as4e-ide/plugins/com.atmel.avr.toolchains.linux.x86_64_3.0.0.201009140852/os/linux/x86_64/avr32/include/)
+
 include_directories(./CCID/LOCAL_ACCESS/)
 include_directories(./CCID/UNIT_TEST/)
 include_directories(./CCID/USART/)