diff options
Diffstat (limited to 'drivers/avr')
| -rw-r--r-- | drivers/avr/ws2812.c | 38 |
1 files changed, 17 insertions, 21 deletions
diff --git a/drivers/avr/ws2812.c b/drivers/avr/ws2812.c index dd2ef89912..77c492cd4c 100644 --- a/drivers/avr/ws2812.c +++ b/drivers/avr/ws2812.c @@ -67,19 +67,27 @@ void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds) { #define w_onecycles (((F_CPU / 1000) * w_onepulse + 500000) / 1000000) #define w_totalcycles (((F_CPU / 1000) * w_totalperiod + 500000) / 1000000) -// w1 - nops between rising edge and falling edge - low -#define w1 (w_zerocycles - w_fixedlow) -// w2 nops between fe low and fe high -#define w2 (w_onecycles - w_fixedhigh - w1) -// w3 nops to complete loop -#define w3 (w_totalcycles - w_fixedtotal - w1 - w2) - -#if w1 > 0 -# define w1_nops w1 +// w1_nops - nops between rising edge and falling edge - low +#if w_zerocycles >= w_fixedlow +# define w1_nops (w_zerocycles - w_fixedlow) #else # define w1_nops 0 #endif +// w2_nops - nops between fe low and fe high +#if w_onecycles >= (w_fixedhigh + w1_nops) +# define w2_nops (w_onecycles - w_fixedhigh - w1_nops) +#else +# define w2_nops 0 +#endif + +// w3_nops - nops to complete loop +#if w_totalcycles >= (w_fixedtotal + w1_nops + w2_nops) +# define w3_nops (w_totalcycles - w_fixedtotal - w1_nops - w2_nops) +#else +# define w3_nops 0 +#endif + // The only critical timing parameter is the minimum pulse length of the "0" // Warn or throw error if this timing can not be met with current F_CPU settings. #define w_lowtime ((w1_nops + w_fixedlow) * 1000000) / (F_CPU / 1000) @@ -90,18 +98,6 @@ void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds) { # warning "Please consider a higher clockspeed, if possible" #endif -#if w2 > 0 -# define w2_nops w2 -#else -# define w2_nops 0 -#endif - -#if w3 > 0 -# define w3_nops w3 -#else -# define w3_nops 0 -#endif - #define w_nop1 "nop \n\t" #define w_nop2 "rjmp .+0 \n\t" #define w_nop4 w_nop2 w_nop2 |