diff options
Diffstat (limited to 'floppyMusic/floppy.c')
| -rw-r--r-- | floppyMusic/floppy.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/floppyMusic/floppy.c b/floppyMusic/floppy.c index 440508b..9d6bd54 100644 --- a/floppyMusic/floppy.c +++ b/floppyMusic/floppy.c @@ -17,7 +17,7 @@ ISR(TIMER0_OVF_vect) for(uint8_t i = 0; i < 8; i++) { - if(floppy_nextrun[i] == timer_overflow_counter ) + if(floppy_nextrun[i] == timer_overflow_counter && floppy_frequencies[i] > 0) { floppy_nextrun[i] += floppy_frequencies[i]; floppy_pulse(i); @@ -87,7 +87,12 @@ void floppy_setup(char *_pulse_port, char *_pulse_ddr, char *_direction_port, ch } } - int floppy_calc_freq(uint32_t _f_hz) + uint8_t floppy_calc_freq(uint32_t _f_hz) { - + if(_f_hz < 31) + return 255; + if(_f_hz > 7813) + return 1; + + return 7913 / _f_hz; }
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