diff options
Diffstat (limited to 'drivers/avr/ws2812.c')
| -rw-r--r-- | drivers/avr/ws2812.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/drivers/avr/ws2812.c b/drivers/avr/ws2812.c deleted file mode 100644 index 77c492cd4c..0000000000 --- a/drivers/avr/ws2812.c +++ /dev/null @@ -1,176 +0,0 @@ -/* - * light weight WS2812 lib V2.0b - * - * Controls WS2811/WS2812/WS2812B RGB-LEDs - * Author: Tim (cpldcpu@gmail.com) - * - * Jan 18th, 2014 v2.0b Initial Version - * Nov 29th, 2015 v2.3 Added SK6812RGBW support - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ -#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); - -void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds) { - DDRx_ADDRESS(RGB_DI_PIN) |= pinmask(RGB_DI_PIN); - - uint8_t masklo = ~(pinmask(RGB_DI_PIN)) & PORTx_ADDRESS(RGB_DI_PIN); - uint8_t maskhi = pinmask(RGB_DI_PIN) | PORTx_ADDRESS(RGB_DI_PIN); - - ws2812_sendarray_mask((uint8_t *)ledarray, number_of_leds * sizeof(LED_TYPE), masklo, maskhi); - - _delay_us(WS2812_TRST_US); -} - -/* - 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(RGB_DI_PIN))), "r"(maskhi), "r"(masklo)); - } - - SREG = sreg_prev; -} |