diff options
Diffstat (limited to 'include/adc.h')
| -rw-r--r-- | include/adc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/adc.h b/include/adc.h index 715852cd76..8c5dda02d5 100644 --- a/include/adc.h +++ b/include/adc.h @@ -10,6 +10,8 @@ #include "common.h" +#define ADC_READ_ERROR -1 + /** * Read an ADC channel. * |