diff options
Diffstat (limited to 'apps/systemlib/ppm_decode.h')
| -rw-r--r-- | apps/systemlib/ppm_decode.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/apps/systemlib/ppm_decode.h b/apps/systemlib/ppm_decode.h index c2b24321a..6c5e15345 100644 --- a/apps/systemlib/ppm_decode.h +++ b/apps/systemlib/ppm_decode.h @@ -46,12 +46,17 @@ */ #define PPM_MAX_CHANNELS 12 +/* PPM input nominal min/max values */ +#define PPM_MIN 1000 +#define PPM_MAX 2000 +#define PPM_MID ((PPM_MIN + PPM_MAX) / 2) + __BEGIN_DECLS /* * PPM decoder state */ -__EXPORT extern uint16_t ppm_buffer[]; /**< decoded PPM channel values */ +__EXPORT extern uint16_t ppm_buffer[PPM_MAX_CHANNELS]; /**< decoded PPM channel values */ __EXPORT extern unsigned ppm_decoded_channels; /**< count of decoded channels */ __EXPORT extern hrt_abstime ppm_last_valid_decode; /**< timestamp of the last valid decode */ |