You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.3 KiB
74 lines
2.3 KiB
4 months ago
|
#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;
|
||
|
|
message.unlucky.number = 42;
|
||
|
|
|
||
|
|
/* 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);
|
||
|
|
printf("Your unlucky number was %u!\n", message.unlucky.number);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|