diff options
| -rw-r--r-- | examples/cmake_simple/CMakeLists.txt | 17 | ||||
| -rw-r--r-- | examples/cmake_simple/README.txt | 25 | ||||
| -rw-r--r-- | examples/cmake_simple/simple.c | 68 | ||||
| -rw-r--r-- | examples/cmake_simple/simple.proto | 7 |
4 files changed, 117 insertions, 0 deletions
diff --git a/examples/cmake_simple/CMakeLists.txt b/examples/cmake_simple/CMakeLists.txt new file mode 100644 index 00000000..5439e8e6 --- /dev/null +++ b/examples/cmake_simple/CMakeLists.txt @@ -0,0 +1,17 @@ +cmake_minimum_required(VERSION 2.8.12) +project(NANOPB_CMAKE_SIMPLE C) + +set(NANOPB_SRC_ROOT_FOLDER ${CMAKE_CURRENT_SOURCE_DIR}/../..) +set(CMAKE_MODULE_PATH ${NANOPB_SRC_ROOT_FOLDER}/extra) +find_package(Nanopb REQUIRED) +include_directories(${NANOPB_INCLUDE_DIRS}) + +nanopb_generate_cpp(PROTO_SRCS PROTO_HDRS simple.proto) +include_directories(${CMAKE_CURRENT_BINARY_DIR}) +#add_custom_target(generate_proto_sources DEPENDS ${PROTO_SRCS} ${PROTO_HDRS}) +set_source_files_properties(${PROTO_SRCS} ${PROTO_HDRS} + PROPERTIES GENERATED TRUE) + +set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Werror -g -O0") + +add_executable(simple simple.c ${PROTO_SRCS} ${PROTO_HDRS}) diff --git a/examples/cmake_simple/README.txt b/examples/cmake_simple/README.txt new file mode 100644 index 00000000..e41b8408 --- /dev/null +++ b/examples/cmake_simple/README.txt @@ -0,0 +1,25 @@ +Nanopb example "simple" using CMake +======================= + +This example is the same as the simple nanopb example but built using CMake. + +Example usage +------------- + +On Linux, create a build directory and then call cmake: + + nanopb/examples/cmake_simple$ mkdir build + nanopb/examples/cmake_simple$ cd build/ + nanopb/examples/cmake_simple/build$ cmake .. + nanopb/examples/cmake_simple/build$ make + +After that, you can run it with the command: ./simple + +#On other platforms, you first have to compile the protocol definition using +#the following command:: +# +# ../../generator-bin/protoc --nanopb_out=. simple.proto +# +#After that, add the following four files to your project and compile: +# +# simple.c simple.pb.c pb_encode.c pb_decode.c diff --git a/examples/cmake_simple/simple.c b/examples/cmake_simple/simple.c new file mode 100644 index 00000000..31272301 --- /dev/null +++ b/examples/cmake_simple/simple.c @@ -0,0 +1,68 @@ +#include <stdio.h> +#include <pb_encode.h> +#include <pb_decode.h> +#include "simple.pb.h" + +int main() +{ + /* This is the buffer where we will store our message. */ + uint8_t buffer[128]; + size_t message_length; + bool status; + + /* Encode our message */ + { + /* Allocate space on the stack to store the message data. + * + * Nanopb generates simple struct definitions for all the messages. + * - check out the contents of simple.pb.h! */ + SimpleMessage message; + + /* Create a stream that will write to our buffer. */ + pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer)); + + /* Fill in the lucky number */ + message.lucky_number = 13; + + /* Now we are ready to encode the message! */ + status = pb_encode(&stream, SimpleMessage_fields, &message); + message_length = stream.bytes_written; + + /* Then just check for any errors.. */ + if (!status) + { + printf("Encoding failed: %s\n", PB_GET_ERROR(&stream)); + return 1; + } + } + + /* Now we could transmit the message over network, store it in a file or + * wrap it to a pigeon's leg. + */ + + /* But because we are lazy, we will just decode it immediately. */ + + { + /* Allocate space for the decoded message. */ + SimpleMessage message; + + /* Create a stream that reads from the buffer. */ + pb_istream_t stream = pb_istream_from_buffer(buffer, message_length); + + /* Now we are ready to decode the message. */ + status = pb_decode(&stream, SimpleMessage_fields, &message); + + /* Check for errors... */ + if (!status) + { + printf("Decoding failed: %s\n", PB_GET_ERROR(&stream)); + return 1; + } + + /* Print the data contained in the message. */ + printf("Your lucky number was %d!\n", message.lucky_number); + } + + return 0; +} + diff --git a/examples/cmake_simple/simple.proto b/examples/cmake_simple/simple.proto new file mode 100644 index 00000000..26e72f46 --- /dev/null +++ b/examples/cmake_simple/simple.proto @@ -0,0 +1,7 @@ +// A very simple protocol definition, consisting of only +// one message. + +message SimpleMessage { + required int32 lucky_number = 1; +} + |