diff options
Diffstat (limited to 'software/rda1846dongle/rda1846_defines.h')
| -rw-r--r-- | software/rda1846dongle/rda1846_defines.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/software/rda1846dongle/rda1846_defines.h b/software/rda1846dongle/rda1846_defines.h index 242df4e..ab4b496 100644 --- a/software/rda1846dongle/rda1846_defines.h +++ b/software/rda1846dongle/rda1846_defines.h @@ -182,10 +182,12 @@ #define RDA1846_DTMF_EN 0x0100 // DTMF tone freq -#define dtmf_tone_freq_hz(value) (value/4.096) -#define dtmf_tone_freq_value(hz) (hz*4.096) +#include <math.h> -// DTMF frequencies @ 12.288 MHz - these are defaults... +#define dtmf_tone_freq_hz(value) (uint16_t)round(value/4.096) +#define dtmf_tone_freq_value(hz) (uint16_t)round(hz*4.096) + +// DTMF frequencies @ 12.288 MHz - these are the defaults... #define RDA1846_DTMF_C0 0x61 // 697 Hz #define RDA1846_DTMF_C1 0x5B // 770 Hz #define RDA1846_DTMF_C2 0x53 // 852 Hz |