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author | 2017-05-02 17:51:53 +0200 | |
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committer | 2017-05-02 17:51:53 +0200 | |
commit | 3102ec9ce009d0f28355c5b7df9c5bd5013e6e75 (patch) | |
tree | 80a1ea19ff06cc9308b236a0d8d6358d21dd0381 /CAN-binder/libs/nanopb/examples/cmake_simple/simple.c | |
parent | 12e680a3c97a2750c657a8c561a79706f3689149 (diff) | |
parent | 278ffb890e3d8722e4c7d824baaf221a1e375fc4 (diff) |
Add 'CAN-binder/libs/nanopb/' from commit '278ffb890e3d8722e4c7d824baaf221a1e375fc4'
git-subtree-dir: CAN-binder/libs/nanopb
git-subtree-mainline: 12e680a3c97a2750c657a8c561a79706f3689149
git-subtree-split: 278ffb890e3d8722e4c7d824baaf221a1e375fc4
Diffstat (limited to 'CAN-binder/libs/nanopb/examples/cmake_simple/simple.c')
-rw-r--r-- | CAN-binder/libs/nanopb/examples/cmake_simple/simple.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/CAN-binder/libs/nanopb/examples/cmake_simple/simple.c b/CAN-binder/libs/nanopb/examples/cmake_simple/simple.c new file mode 100644 index 00000000..1f6b1373 --- /dev/null +++ b/CAN-binder/libs/nanopb/examples/cmake_simple/simple.c @@ -0,0 +1,71 @@ +#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! + * It is a good idea to always initialize your structures + * so that you do not have garbage data from RAM in there. + */ + SimpleMessage message = SimpleMessage_init_zero; + + /* 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 = SimpleMessage_init_zero; + + /* 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; +} + |