examples/using_double_on_avr/encode_double.c

   1 /* Encodes a float value into a double on the wire.
   2  * Used to emit doubles from AVR code, which doesn't support double directly.
   3  */
   4
   5 #include <stdio.h>
   6 #include <pb_encode.h>
   7 #include "double_conversion.h"
   8 #include "doubleproto.pb.h"
   9
  10 int main()
  11 {
  12     AVRDoubleMessage message = {
  13         float_to_double(1234.5678f),
  14         float_to_double(0.00001f)
  15     };
  16
  17     uint8_t buffer[32];
  18     pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
  19
  20     pb_encode(&stream, AVRDoubleMessage_fields, &message);
  21     fwrite(buffer, 1, stream.bytes_written, stdout);
  22
  23     return 0;
  24 }
  25