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216 lines
6.7 KiB
216 lines
6.7 KiB
/* Copyright 2021 Drashna Jael're
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include QMK_KEYBOARD_H
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#include "rgb_functions.h"
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#ifdef RGBLIGHT_ENABLE
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# include "ws2812.h"
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# include <avr/interrupt.h>
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# include <avr/io.h>
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# include <util/delay.h>
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# define pinmask(pin) (_BV((pin)&0xF))
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/*
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* Forward declare internal functions
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*
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* The functions take a byte-array and send to the data output as WS2812 bitstream.
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* The length is the number of bytes to send - three per LED.
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*/
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static inline void ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t masklo, uint8_t maskhi);
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/*
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This routine writes an array of bytes with RGB values to the Dataout pin
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using the fast 800kHz clockless WS2811/2812 protocol.
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*/
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// Timing in ns
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# define w_zeropulse 350
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# define w_onepulse 900
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# define w_totalperiod 1250
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// Fixed cycles used by the inner loop
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# define w_fixedlow 2
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# define w_fixedhigh 4
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# define w_fixedtotal 8
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// Insert NOPs to match the timing, if possible
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# define w_zerocycles (((F_CPU / 1000) * w_zeropulse) / 1000000)
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# define w_onecycles (((F_CPU / 1000) * w_onepulse + 500000) / 1000000)
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# define w_totalcycles (((F_CPU / 1000) * w_totalperiod + 500000) / 1000000)
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// w1_nops - nops between rising edge and falling edge - low
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# if w_zerocycles >= w_fixedlow
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# define w1_nops (w_zerocycles - w_fixedlow)
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# else
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# define w1_nops 0
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# endif
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// w2_nops - nops between fe low and fe high
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# if w_onecycles >= (w_fixedhigh + w1_nops)
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# define w2_nops (w_onecycles - w_fixedhigh - w1_nops)
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# else
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# define w2_nops 0
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# endif
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// w3_nops - nops to complete loop
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# if w_totalcycles >= (w_fixedtotal + w1_nops + w2_nops)
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# define w3_nops (w_totalcycles - w_fixedtotal - w1_nops - w2_nops)
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# else
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# define w3_nops 0
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# endif
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// The only critical timing parameter is the minimum pulse length of the "0"
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// Warn or throw error if this timing can not be met with current F_CPU settings.
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# define w_lowtime ((w1_nops + w_fixedlow) * 1000000) / (F_CPU / 1000)
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# if w_lowtime > 550
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# error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?"
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# elif w_lowtime > 450
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# warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)."
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# warning "Please consider a higher clockspeed, if possible"
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# endif
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# define w_nop1 "nop \n\t"
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# define w_nop2 "rjmp .+0 \n\t"
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# define w_nop4 w_nop2 w_nop2
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# define w_nop8 w_nop4 w_nop4
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# define w_nop16 w_nop8 w_nop8
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static inline void ws2812_sendarray_mask(uint8_t *data, uint16_t datlen, uint8_t masklo, uint8_t maskhi) {
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uint8_t curbyte, ctr, sreg_prev;
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sreg_prev = SREG;
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cli();
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while (datlen--) {
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curbyte = (*data++);
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asm volatile(" ldi %0,8 \n\t"
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"loop%=: \n\t"
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" out %2,%3 \n\t" // '1' [01] '0' [01] - re
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# if (w1_nops & 1)
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w_nop1
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# endif
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# if (w1_nops & 2)
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w_nop2
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# endif
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# if (w1_nops & 4)
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w_nop4
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# endif
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# if (w1_nops & 8)
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w_nop8
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# endif
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# if (w1_nops & 16)
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w_nop16
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# endif
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" sbrs %1,7 \n\t" // '1' [03] '0' [02]
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" out %2,%4 \n\t" // '1' [--] '0' [03] - fe-low
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" lsl %1 \n\t" // '1' [04] '0' [04]
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# if (w2_nops & 1)
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w_nop1
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# endif
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# if (w2_nops & 2)
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w_nop2
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# endif
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# if (w2_nops & 4)
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w_nop4
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# endif
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# if (w2_nops & 8)
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w_nop8
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# endif
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# if (w2_nops & 16)
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w_nop16
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# endif
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" out %2,%4 \n\t" // '1' [+1] '0' [+1] - fe-high
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# if (w3_nops & 1)
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w_nop1
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# endif
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# if (w3_nops & 2)
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w_nop2
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# endif
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# if (w3_nops & 4)
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w_nop4
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# endif
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# if (w3_nops & 8)
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w_nop8
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# endif
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# if (w3_nops & 16)
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w_nop16
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# endif
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" dec %0 \n\t" // '1' [+2] '0' [+2]
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" brne loop%=\n\t" // '1' [+3] '0' [+4]
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: "=&d"(ctr)
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: "r"(curbyte), "I"(_SFR_IO_ADDR(PORTx_ADDRESS(RGBLIGHT_DI_PIN))), "r"(maskhi), "r"(masklo));
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}
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SREG = sreg_prev;
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}
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void rgblight_call_driver(LED_TYPE *start_led, uint8_t num_leds) {
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DDRx_ADDRESS(RGBLIGHT_DI_PIN) |= pinmask(RGBLIGHT_DI_PIN);
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uint8_t masklo = ~(pinmask(RGBLIGHT_DI_PIN)) & PORTx_ADDRESS(RGBLIGHT_DI_PIN);
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uint8_t maskhi = pinmask(RGBLIGHT_DI_PIN) | PORTx_ADDRESS(RGBLIGHT_DI_PIN);
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ws2812_sendarray_mask((uint8_t *)start_led, num_leds * sizeof(LED_TYPE), masklo, maskhi);
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_delay_us(WS2812_TRST_US);
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}
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#endif
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#ifdef RGB_MATRIX_ENABLE
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bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
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if (!process_record_user(keycode, record)) { return false; }
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if (record->event.pressed) {
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switch(keycode) {
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case RGB_MATRIX_TOGGLE: // toggle rgb matrix
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rgb_matrix_toggle();
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return false;
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case RGB_MATRIX_MODE_INC:
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rgb_matrix_step();
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return false;
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case RGB_MATRIX_MODE_DEC:
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rgb_matrix_step_reverse();
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return false;
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case RGB_MATRIX_HUE_INC:
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rgb_matrix_increase_hue();
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return false;
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case RGB_MATRIX_HUE_DEC:
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rgb_matrix_decrease_hue();
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return false;
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case RGB_MATRIX_SAT_INC:
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rgb_matrix_increase_sat();
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return false;
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case RGB_MATRIX_SAT_DEC:
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rgb_matrix_decrease_sat();
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return false;
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case RGB_MATRIX_VAL_INC:
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rgb_matrix_increase_val();
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return false;
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case RGB_MATRIX_VAL_DEC:
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rgb_matrix_decrease_val();
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return false;
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default:
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break;
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}
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}
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return true;
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}
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#endif
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