Add an example of handling doubles on AVR platform.

1 files changed, 33 insertions, 0 deletions

diff --git a/example_avr_double/decode_double.c b/example_avr_double/decode_double.c
new file mode 100644
index 0000000..5802eca
--- /dev/null
+++ b/example_avr_double/decode_double.c
@@ -0,0 +1,33 @@
+/* Decodes a double value into a float variable.
+ * Used to read double values with AVR code, which doesn't support double directly.
+ */
+
+#include <stdio.h>
+#include <pb_decode.h>
+#include "double_conversion.h"
+#include "doubleproto.pb.h"
+
+int main()
+{
+    uint8_t buffer[32];
+    size_t count = fread(buffer, 1, sizeof(buffer), stdin);
+    pb_istream_t stream = pb_istream_from_buffer(buffer, count);
+    
+    AVRDoubleMessage message;
+    pb_decode(&stream, AVRDoubleMessage_fields, &message);
+    
+    float v1 = double_to_float(message.field1);
+    float v2 = double_to_float(message.field2);
+
+    printf("Values: %f %f\n", v1, v2);
+    
+    if (v1 == 1234.5678f &&
+        v2 == 0.00001f)
+    {
+        return 0;
+    }
+    else
+    {
+        return 1;
+    }
+}