iso14229

简体中文

iso14229 is a UDS server and client implementation (ISO14229-1:2013) targeting embedded systems. It embeds the isotp-c ISO15765-2 (ISO-TP) transport layer.

API status: unstable

Features:

dependency injection gives you complete control
uses only static memory allocation
architecture-independent
- tested: arm, x86-64, ppc
- tests run under qemu
has many existing unit-tests and tests are easy to extend

supported functions (server and client )

SID	name	supported
0x10	diagnostic session control	✅
0x11	ECU reset	✅
0x14	clear diagnostic information	❌
0x19	read DTC information	❌
0x22	read data by identifier	✅
0x23	read memory by address	❌
0x24	read scaling data by identifier	❌
0x27	security access	✅
0x28	communication control	✅
0x2A	read periodic data by identifier	❌
0x2C	dynamically define data identifier	❌
0x2E	write data by identifier	✅
0x2F	input control by identifier	❌
0x31	routine control	✅
0x34	request download	✅
0x35	request upload	❌
0x36	transfer data	✅
0x37	request transfer exit	✅
0x38	request file transfer	❌
0x3D	write memory by address	❌
0x3E	tester present	✅
0x83	access timing parameter	❌
0x84	secured data transmission	❌
0x85	control DTC setting	✅
0x86	response on event	❌

Documentation

Examples

examples/README.md

Tests

test_iso14229.c

Running Tests

make test

qemu

CC=powerpc-linux-gnu-gcc make test_bin
qemu-ppc -L /usr/powerpc-linux-gnu test_bin

wine

CC=x86_64-w64-mingw32-gcc make test_bin
wine test_bin.exe

Contributing

contributions are welcome

Acknowledgements

isotp which this project embeds

License

MIT

Changelog

0.0.0

initial release

0.1.0

Add client
Add server SID 0x27 SecurityAccess
API changes

0.2.0

removed all instances of __attribute__((packed))
refactored server download functional unit API to simplify testing
refactored tests
- ordered by service
- documented macros
removed middleware
simplified server routine control API
removed redundant function iso14229ServerEnableService
updated example

0.3.0

added iso14229ClientRunSequenceBlocking(...)
added server and client examples
simplified test flow, deleted opaque macros and switch statements
flattened client and server main structs
simplified usage by moving isotp-c initialization parameters into server/client config structs
remove redundant buffers in server

Design Docs

Client State Machine

@startuml
title 客户端请求状态机
note as N1
enum {
    kNoError=0,
    kErrBadRequest,
    kErrP2Timeout,
} ClientErr;

static inline bool isRequestComplete() {return state==Idle;}

while (Idle != client->state) {
    receiveCAN(client);
    Iso14229ClientPoll(client);
}
end note

state Idle
state Sending
state Sent
state SentAwaitResponse
state ProcessResponse
Idle: if (ISOTP_RET_OK == isotp_receive(...)) // Error
ProcessResponse: isotp_receive()
ProcessResponse: _ClientValidateResponse(...)
ProcessResponse: _ClientHandleResponse(...)

Sending --> Sent: 传输层完成传输 

Sent --> Idle : suppressPositiveResponse
Sending --> SentAwaitResponse: !suppressPositiveResponse
SentAwaitResponse -> Idle: 响应收到了 ||\np2 超时
SentAwaitResponse --> ProcessResponse : ISOTP_RECEIVE_STATUS_FULL == link->receive_status
ProcessResponse --> Idle

[*] -> Idle
Idle -> Sending : _SendRequest()

@enduml

@startuml
title Request Lifecycle
alt normal
    alt positive response
        client --> client: Sending
        client -> server : *Any* Service
        client --> client: SentAwaitResponse: set p2
        alt 0x78 requestCorrectlyReceived-ResponsePending
            server -> client : 0x3F 0x78 
            client -->server : txLink  idle
            client --> client: SentAwaitResponse: set p2star
        end
        server -> client : Positive Service Response
        client --> client: Idle 
    else negative response
        server -> client !! : Negative Service Response
        client --> client: Idle: RequestErrorNegativeResponse
    else SID mismatch
        server -> client !! : Mismatched Service Response
        client --> client: Idle: RequestErrorResponseSIDMismatch
    end
else unexpected response
    server -> client !! : Unexpected Response
    client --> client: Idle: RequestErrorUnsolicitedResponse
end
@enduml

@startuml
' !pragma useVerticalIf on
title 客户端请求流程
start

:clientSendRequest();
if (验证参数) then (对)
:ok;
else (不对)
:foo;
detach
endif

:clearRequestContext();
if (等待UDS访问) then (访问接收了,进入UDS会话)
else (时间超过<b>20ms)
@enduml

Server 0x78 requestCorrectlyReceived-ResponsePending

@startuml
client -> server : *Any* Service
server -> userServiceHandler: handler(args)
note right: Doing this will take a long time\nso I return 0x78
userServiceHandler -> server: 0x78
server -> client : 0x3F 0x78 
client -->server : txLink  idle
server -> userServiceHandler: handler(args)
note right: actually call the long-running service
... p2* > t > p2 ... 
userServiceHandler -> server : Service Response
server -> client : Service Response
@enduml

@startuml
' !pragma useVerticalIf on
title 0x78流程(写flash)
start

:BufferedWriterWrite(BufferedWriter *self, const uint8_t *ibuf, uint32_t size, bool RCRRP);

if (RCRRP) then (true)
:write to flash;
else (false)
endif
if (iBufIdx == size) then (true)
    :write to pageBuffer;
    :iBufIdx = 0;
    :return kBufferedWriterWritePending;
    :0x78 RCRRP;
    detach;
else (false)
    :memmove(pageBuffer + pageBufIdx, iBuf + iBufIdx, size - iBufIdx);
    :write to pageBuffer;
    :iBufIdx += size;
    :0x01 PositiveResponse;
    :0x78 RCRRP;
    detach
endif

@enduml

lhc180/iso14229