diff options
Diffstat (limited to 'keyboards/work_louder/rgb_functions.c')
| -rw-r--r-- | keyboards/work_louder/rgb_functions.c | 157 |
1 files changed, 152 insertions, 5 deletions
diff --git a/keyboards/work_louder/rgb_functions.c b/keyboards/work_louder/rgb_functions.c index 5a2043f9b4..c9106b3976 100644 --- a/keyboards/work_louder/rgb_functions.c +++ b/keyboards/work_louder/rgb_functions.c @@ -17,13 +17,160 @@ #include QMK_KEYBOARD_H #include "rgb_functions.h" -#if defined(RGBLIGHT_ENABLE) && defined(RGB_MATRIX_EANBLE) -# undef RGB_DI_PIN -# define RGBLIGHT_DI_PIN -# include "ws2812.c" +#ifdef RGBLIGHT_ENABLE +# include "ws2812.h" +# include <avr/interrupt.h> +# include <avr/io.h> +# include <util/delay.h> + +# define pinmask(pin) (_BV((pin)&0xF)) + +/* + * Forward declare internal functions + * + * The functions take a byte-array and send to the data output as WS2812 bitstream. + * The length is the number of bytes to send - three per LED. + */ + +static inline void ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t masklo, uint8_t maskhi); + +/* + This routine writes an array of bytes with RGB values to the Dataout pin + using the fast 800kHz clockless WS2811/2812 protocol. +*/ + +// Timing in ns +# define w_zeropulse 350 +# define w_onepulse 900 +# define w_totalperiod 1250 + +// Fixed cycles used by the inner loop +# define w_fixedlow 2 +# define w_fixedhigh 4 +# define w_fixedtotal 8 + +// Insert NOPs to match the timing, if possible +# define w_zerocycles (((F_CPU / 1000) * w_zeropulse) / 1000000) +# define w_onecycles (((F_CPU / 1000) * w_onepulse + 500000) / 1000000) +# define w_totalcycles (((F_CPU / 1000) * w_totalperiod + 500000) / 1000000) + +// 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) +# if w_lowtime > 550 +# error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?" +# elif w_lowtime > 450 +# warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)." +# warning "Please consider a higher clockspeed, if possible" +# endif + +# define w_nop1 "nop \n\t" +# define w_nop2 "rjmp .+0 \n\t" +# define w_nop4 w_nop2 w_nop2 +# define w_nop8 w_nop4 w_nop4 +# define w_nop16 w_nop8 w_nop8 + +static inline void ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t masklo, uint8_t maskhi) { + uint8_t curbyte, ctr, sreg_prev; + + sreg_prev = SREG; + cli(); + + while (datlen--) { + curbyte = (*data++); + + asm volatile(" ldi %0,8 \n\t" + "loop%=: \n\t" + " out %2,%3 \n\t" // '1' [01] '0' [01] - re +# if (w1_nops & 1) + w_nop1 +# endif +# if (w1_nops & 2) + w_nop2 +# endif +# if (w1_nops & 4) + w_nop4 +# endif +# if (w1_nops & 8) + w_nop8 +# endif +# if (w1_nops & 16) + w_nop16 +# endif + " sbrs %1,7 \n\t" // '1' [03] '0' [02] + " out %2,%4 \n\t" // '1' [--] '0' [03] - fe-low + " lsl %1 \n\t" // '1' [04] '0' [04] +# if (w2_nops & 1) + w_nop1 +# endif +# if (w2_nops & 2) + w_nop2 +# endif +# if (w2_nops & 4) + w_nop4 +# endif +# if (w2_nops & 8) + w_nop8 +# endif +# if (w2_nops & 16) + w_nop16 +# endif + " out %2,%4 \n\t" // '1' [+1] '0' [+1] - fe-high +# if (w3_nops & 1) + w_nop1 +# endif +# if (w3_nops & 2) + w_nop2 +# endif +# if (w3_nops & 4) + w_nop4 +# endif +# if (w3_nops & 8) + w_nop8 +# endif +# if (w3_nops & 16) + w_nop16 +# endif + + " dec %0 \n\t" // '1' [+2] '0' [+2] + " brne loop%=\n\t" // '1' [+3] '0' [+4] + : "=&d"(ctr) + : "r"(curbyte), "I"(_SFR_IO_ADDR(PORTx_ADDRESS(RGBLIGHT_DI_PIN))), "r"(maskhi), "r"(masklo)); + } + + SREG = sreg_prev; +} void rgblight_call_driver(LED_TYPE *start_led, uint8_t num_leds) { - ws2812_setleds(start_led, num_leds); + DDRx_ADDRESS(RGBLIGHT_DI_PIN) |= pinmask(RGBLIGHT_DI_PIN); + + uint8_t masklo = ~(pinmask(RGBLIGHT_DI_PIN)) & PORTx_ADDRESS(RGBLIGHT_DI_PIN); + uint8_t maskhi = pinmask(RGBLIGHT_DI_PIN) | PORTx_ADDRESS(RGBLIGHT_DI_PIN); + + ws2812_sendarray_mask((uint8_t *)start_led, num_leds * sizeof(LED_TYPE), masklo, maskhi); + + _delay_us(WS2812_TRST_US); } #endif |