esp32-hal-rgb-led.c

// Copyright 2024 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include"soc/soc_caps.h"

#include"esp32-hal-rgb-led.h"

// Backward compatibility - Deprecated. It will be removed in future releases.
voidneopixelWrite(uint8_tpin, uint8_tred_val, uint8_tgreen_val, uint8_tblue_val) {
log_w("neopixelWrite() is deprecated. Use rgbLedWrite().");
rgbLedWrite(pin, red_val, green_val, blue_val);
}

voidrgbLedWrite(uint8_tpin, uint8_tred_val, uint8_tgreen_val, uint8_tblue_val) {
rgbLedWriteOrdered(pin, RGB_BUILTIN_LED_COLOR_ORDER, red_val, green_val, blue_val);
}

voidrgbLedWriteOrdered(uint8_tpin, rgb_led_color_order_torder, uint8_tred_val, uint8_tgreen_val, uint8_tblue_val) {
#ifSOC_RMT_SUPPORTED
rmt_data_tled_data[24];

// Verify if the pin used is RGB_BUILTIN and fix GPIO number
#ifdefRGB_BUILTIN
pin=pin==RGB_BUILTIN ? pin-SOC_GPIO_PIN_COUNT : pin;
#endif
if (!rmtInit(pin, RMT_TX_MODE, RMT_MEM_NUM_BLOCKS_1, 10000000)) {
log_e("RGB LED driver initialization failed for GPIO%d!", pin);
return;
 }

// default WS2812B color order is G, R, B
intcolor[3] = {green_val, red_val, blue_val};

switch (order) {
caseLED_COLOR_ORDER_RGB:
color[0] =red_val;
color[1] =green_val;
color[2] =blue_val;
break;
caseLED_COLOR_ORDER_BGR:
color[0] =blue_val;
color[1] =green_val;
color[2] =red_val;
break;
caseLED_COLOR_ORDER_BRG:
color[0] =blue_val;
color[1] =red_val;
color[2] =green_val;
break;
caseLED_COLOR_ORDER_RBG:
color[0] =red_val;
color[1] =blue_val;
color[2] =green_val;
break;
caseLED_COLOR_ORDER_GBR:
color[0] =green_val;
color[1] =blue_val;
color[2] =red_val;
break;
default: // GRB
break;
 }

inti=0;
for (intcol=0; col<3; col++) {
for (intbit=0; bit<8; bit++) {
if ((color[col] & (1 << (7-bit)))) {
// HIGH bit
led_data[i].level0=1; // T1H
led_data[i].duration0=8; // 0.8us
led_data[i].level1=0; // T1L
led_data[i].duration1=4; // 0.4us
 } else {
// LOW bit
led_data[i].level0=1; // T0H
led_data[i].duration0=4; // 0.4us
led_data[i].level1=0; // T0L
led_data[i].duration1=8; // 0.8us
 }
i++;
 }
 }
rmtWrite(pin, led_data, RMT_SYMBOLS_OF(led_data), RMT_WAIT_FOR_EVER);
#else
log_e("RMT is not supported on "CONFIG_IDF_TARGET);
#endif/* SOC_RMT_SUPPORTED */
}