summaryrefslogtreecommitdiff
path: root/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/esp.c
diff options
context:
space:
mode:
Diffstat (limited to '.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/esp.c')
-rw-r--r--.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/esp.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/esp.c b/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/esp.c
new file mode 100644
index 0000000..b8c832e
--- /dev/null
+++ b/.pio/libdeps/esp32-s3-n16r8/Adafruit NeoPixel/esp.c
@@ -0,0 +1,282 @@
+// Implements the RMT peripheral on Espressif SoCs
+// Copyright (c) 2020 Lucian Copeland for Adafruit Industries
+
+/* Uses code from Espressif RGB LED Strip demo and drivers
+ * Copyright 2015-2020 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.
+ */
+
+#if defined(ESP32)
+
+#include <Arduino.h>
+
+#if defined(ESP_IDF_VERSION)
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0)
+#define HAS_ESP_IDF_4
+#endif
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+#define HAS_ESP_IDF_5
+#endif
+#endif
+
+#ifdef HAS_ESP_IDF_5
+
+static SemaphoreHandle_t show_mutex = NULL;
+
+void espShow(uint8_t pin, uint8_t *pixels, uint32_t numBytes,
+ boolean is800KHz) {
+ // Note: Because rmtPin is shared between all instances, we will
+ // end up releasing/initializing the RMT channels each time we
+ // invoke on different pins. This is probably ok, just not
+ // efficient. led_data is shared between all instances but will
+ // be allocated with enough space for the largest instance; data
+ // is not used beyond the mutex lock so this should be fine.
+
+#define SEMAPHORE_TIMEOUT_MS 50
+
+ static rmt_data_t *led_data = NULL;
+ static uint32_t led_data_size = 0;
+ static int rmtPin = -1;
+
+ if (show_mutex &&
+ xSemaphoreTake(show_mutex, SEMAPHORE_TIMEOUT_MS / portTICK_PERIOD_MS) ==
+ pdTRUE) {
+ uint32_t requiredSize = numBytes * 8;
+ if (requiredSize > led_data_size) {
+ free(led_data);
+ led_data = (rmt_data_t *)malloc(requiredSize * sizeof(rmt_data_t));
+ if (led_data != NULL) {
+ led_data_size = requiredSize;
+ } else {
+ led_data_size = 0;
+ }
+ } else if (requiredSize == 0) {
+ // To release RMT resources (RMT channels and led_data), call
+ // .updateLength(0) to set number of pixels/bytes to zero,
+ // then call .show() to invoke this code and free resources.
+ free(led_data);
+ led_data = NULL;
+ if (rmtPin >= 0) {
+ rmtDeinit(rmtPin);
+ rmtPin = -1;
+ }
+ led_data_size = 0;
+ }
+
+ if (led_data_size > 0 && requiredSize <= led_data_size) {
+ if (pin != rmtPin) {
+ if (rmtPin >= 0) {
+ rmtDeinit(rmtPin);
+ rmtPin = -1;
+ }
+ if (!rmtInit(pin, RMT_TX_MODE, RMT_MEM_NUM_BLOCKS_1,
+ 10000000)) {
+ log_e("Failed to init RMT TX mode on pin %d", pin);
+ return;
+ }
+ rmtPin = pin;
+ }
+
+ if (rmtPin >= 0) {
+ int i = 0;
+ for (int b = 0; b < numBytes; b++) {
+ for (int bit = 0; bit < 8; bit++) {
+ if (pixels[b] & (1 << (7 - bit))) {
+ led_data[i].level0 = 1;
+ led_data[i].duration0 = 8;
+ led_data[i].level1 = 0;
+ led_data[i].duration1 = 4;
+ } else {
+ led_data[i].level0 = 1;
+ led_data[i].duration0 = 4;
+ led_data[i].level1 = 0;
+ led_data[i].duration1 = 8;
+ }
+ i++;
+ }
+ }
+
+ rmtWrite(pin, led_data, numBytes * 8, RMT_WAIT_FOR_EVER);
+ }
+ }
+
+ xSemaphoreGive(show_mutex);
+ }
+}
+
+// To avoid race condition initializing the mutex, all instances of
+// Adafruit_NeoPixel must be constructed before launching and child threads
+void espInit() {
+ if (!show_mutex) {
+ show_mutex = xSemaphoreCreateMutex();
+ }
+}
+
+#else
+
+#include "driver/rmt.h"
+
+// This code is adapted from the ESP-IDF v3.4 RMT "led_strip" example, altered
+// to work with the Arduino version of the ESP-IDF (3.2)
+
+#define WS2812_T0H_NS (400)
+#define WS2812_T0L_NS (850)
+#define WS2812_T1H_NS (800)
+#define WS2812_T1L_NS (450)
+
+#define WS2811_T0H_NS (500)
+#define WS2811_T0L_NS (2000)
+#define WS2811_T1H_NS (1200)
+#define WS2811_T1L_NS (1300)
+
+static uint32_t t0h_ticks = 0;
+static uint32_t t1h_ticks = 0;
+static uint32_t t0l_ticks = 0;
+static uint32_t t1l_ticks = 0;
+
+// Limit the number of RMT channels available for the Neopixels. Defaults to all
+// channels (8 on ESP32, 4 on ESP32-S2 and S3). Redefining this value will free
+// any channels with a higher number for other uses, such as IR send-and-recieve
+// libraries. Redefine as 1 to restrict Neopixels to only a single channel.
+#define ADAFRUIT_RMT_CHANNEL_MAX RMT_CHANNEL_MAX
+
+#define RMT_LL_HW_BASE (&RMT)
+
+bool rmt_reserved_channels[ADAFRUIT_RMT_CHANNEL_MAX];
+
+static void IRAM_ATTR ws2812_rmt_adapter(const void *src, rmt_item32_t *dest,
+ size_t src_size, size_t wanted_num,
+ size_t *translated_size,
+ size_t *item_num) {
+ if (src == NULL || dest == NULL) {
+ *translated_size = 0;
+ *item_num = 0;
+ return;
+ }
+ const rmt_item32_t bit0 = {{{t0h_ticks, 1, t0l_ticks, 0}}}; // Logical 0
+ const rmt_item32_t bit1 = {{{t1h_ticks, 1, t1l_ticks, 0}}}; // Logical 1
+ size_t size = 0;
+ size_t num = 0;
+ uint8_t *psrc = (uint8_t *)src;
+ rmt_item32_t *pdest = dest;
+ while (size < src_size && num < wanted_num) {
+ for (int i = 0; i < 8; i++) {
+ // MSB first
+ if (*psrc & (1 << (7 - i))) {
+ pdest->val = bit1.val;
+ } else {
+ pdest->val = bit0.val;
+ }
+ num++;
+ pdest++;
+ }
+ size++;
+ psrc++;
+ }
+ *translated_size = size;
+ *item_num = num;
+}
+
+void espShow(uint8_t pin, uint8_t *pixels, uint32_t numBytes,
+ boolean is800KHz) {
+ // Reserve channel
+ rmt_channel_t channel = ADAFRUIT_RMT_CHANNEL_MAX;
+ for (size_t i = 0; i < ADAFRUIT_RMT_CHANNEL_MAX; i++) {
+ if (!rmt_reserved_channels[i]) {
+ rmt_reserved_channels[i] = true;
+ channel = i;
+ break;
+ }
+ }
+ if (channel == ADAFRUIT_RMT_CHANNEL_MAX) {
+ // Ran out of channels!
+ return;
+ }
+
+#if defined(HAS_ESP_IDF_4)
+ rmt_config_t config = RMT_DEFAULT_CONFIG_TX(pin, channel);
+ config.clk_div = 2;
+#else
+ // Match default TX config from ESP-IDF version 3.4
+ rmt_config_t config = {.rmt_mode = RMT_MODE_TX,
+ .channel = channel,
+ .gpio_num = pin,
+ .clk_div = 2,
+ .mem_block_num = 1,
+ .tx_config = {
+ .carrier_freq_hz = 38000,
+ .carrier_level = RMT_CARRIER_LEVEL_HIGH,
+ .idle_level = RMT_IDLE_LEVEL_LOW,
+ .carrier_duty_percent = 33,
+ .carrier_en = false,
+ .loop_en = false,
+ .idle_output_en = true,
+ }};
+#endif
+ rmt_config(&config);
+ rmt_driver_install(config.channel, 0, 0);
+
+ // Convert NS timings to ticks
+ uint32_t counter_clk_hz = 0;
+
+#if defined(HAS_ESP_IDF_4)
+ rmt_get_counter_clock(channel, &counter_clk_hz);
+#else
+ // this emulates the rmt_get_counter_clock() function from ESP-IDF 3.4
+ if (RMT_LL_HW_BASE->conf_ch[config.channel].conf1.ref_always_on ==
+ RMT_BASECLK_REF) {
+ uint32_t div_cnt =
+ RMT_LL_HW_BASE->conf_ch[config.channel].conf0.div_cnt;
+ uint32_t div = div_cnt == 0 ? 256 : div_cnt;
+ counter_clk_hz = REF_CLK_FREQ / (div);
+ } else {
+ uint32_t div_cnt =
+ RMT_LL_HW_BASE->conf_ch[config.channel].conf0.div_cnt;
+ uint32_t div = div_cnt == 0 ? 256 : div_cnt;
+ counter_clk_hz = APB_CLK_FREQ / (div);
+ }
+#endif
+
+ // NS to tick converter
+ float ratio = (float)counter_clk_hz / 1e9;
+
+ if (is800KHz) {
+ t0h_ticks = (uint32_t)(ratio * WS2812_T0H_NS);
+ t0l_ticks = (uint32_t)(ratio * WS2812_T0L_NS);
+ t1h_ticks = (uint32_t)(ratio * WS2812_T1H_NS);
+ t1l_ticks = (uint32_t)(ratio * WS2812_T1L_NS);
+ } else {
+ t0h_ticks = (uint32_t)(ratio * WS2811_T0H_NS);
+ t0l_ticks = (uint32_t)(ratio * WS2811_T0L_NS);
+ t1h_ticks = (uint32_t)(ratio * WS2811_T1H_NS);
+ t1l_ticks = (uint32_t)(ratio * WS2811_T1L_NS);
+ }
+
+ // Initialize automatic timing translator
+ rmt_translator_init(config.channel, ws2812_rmt_adapter);
+
+ // Write and wait to finish
+ rmt_write_sample(config.channel, pixels, (size_t)numBytes, true);
+ rmt_wait_tx_done(config.channel, pdMS_TO_TICKS(100));
+
+ // Free channel again
+ rmt_driver_uninstall(config.channel);
+ rmt_reserved_channels[channel] = false;
+
+ gpio_set_direction(pin, GPIO_MODE_OUTPUT);
+}
+
+#endif // ifndef IDF5
+
+#endif // ifdef(ESP32)
generated by cgit v1.2.3 (git 2.46.0) at 2026-06-30 06:26:34 +0000