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authorRomain Forlot <romain.forlot@iot.bzh>2017-06-20 10:24:05 +0000
committerRomain Forlot <romain.forlot@iot.bzh>2017-06-20 10:24:05 +0000
commit32e25cbca210a359b09768537b6f443fe90a3070 (patch)
tree3309794c15d8a8f8e9c1c08cad072ee1378813ba /libs/nanopb/examples/simple/simple.c
parent76c43dec62b2e21cd6446360c00d4fe6b437533f (diff)
Separation Generator to a dedicated repo
Change-Id: Id94831651c3266861435272a6e36c7884bef2c45 Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'libs/nanopb/examples/simple/simple.c')
-rw-r--r--libs/nanopb/examples/simple/simple.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/libs/nanopb/examples/simple/simple.c b/libs/nanopb/examples/simple/simple.c
new file mode 100644
index 00000000..1f6b1373
--- /dev/null
+++ b/libs/nanopb/examples/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;
+}
+