diff options
Diffstat (limited to 'tinyusb/hw/bsp/esp32s2/components/led_strip/src/led_strip_rmt_ws2812.c')
| -rwxr-xr-x | tinyusb/hw/bsp/esp32s2/components/led_strip/src/led_strip_rmt_ws2812.c | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/tinyusb/hw/bsp/esp32s2/components/led_strip/src/led_strip_rmt_ws2812.c b/tinyusb/hw/bsp/esp32s2/components/led_strip/src/led_strip_rmt_ws2812.c deleted file mode 100755 index 025d3c59..00000000 --- a/tinyusb/hw/bsp/esp32s2/components/led_strip/src/led_strip_rmt_ws2812.c +++ /dev/null @@ -1,171 +0,0 @@ -// Copyright 2019 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 <stdlib.h> -#include <string.h> -#include <sys/cdefs.h> -#include "esp_log.h" -#include "esp_attr.h" -#include "led_strip.h" -#include "driver/rmt.h" - -static const char *TAG = "ws2812"; -#define STRIP_CHECK(a, str, goto_tag, ret_value, ...) \ - do \ - { \ - if (!(a)) \ - { \ - ESP_LOGE(TAG, "%s(%d): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \ - ret = ret_value; \ - goto goto_tag; \ - } \ - } while (0) - -#define WS2812_T0H_NS (350) -#define WS2812_T0L_NS (1000) -#define WS2812_T1H_NS (1000) -#define WS2812_T1L_NS (350) -#define WS2812_RESET_US (280) - -static uint32_t ws2812_t0h_ticks = 0; -static uint32_t ws2812_t1h_ticks = 0; -static uint32_t ws2812_t0l_ticks = 0; -static uint32_t ws2812_t1l_ticks = 0; - -typedef struct { - led_strip_t parent; - rmt_channel_t rmt_channel; - uint32_t strip_len; - uint8_t buffer[0]; -} ws2812_t; - -/** - * @brief Conver RGB data to RMT format. - * - * @note For WS2812, R,G,B each contains 256 different choices (i.e. uint8_t) - * - * @param[in] src: source data, to converted to RMT format - * @param[in] dest: place where to store the convert result - * @param[in] src_size: size of source data - * @param[in] wanted_num: number of RMT items that want to get - * @param[out] translated_size: number of source data that got converted - * @param[out] item_num: number of RMT items which are converted from source data - */ -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 = {{{ ws2812_t0h_ticks, 1, ws2812_t0l_ticks, 0 }}}; //Logical 0 - const rmt_item32_t bit1 = {{{ ws2812_t1h_ticks, 1, ws2812_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; -} - -static esp_err_t ws2812_set_pixel(led_strip_t *strip, uint32_t index, uint32_t red, uint32_t green, uint32_t blue) -{ - esp_err_t ret = ESP_OK; - ws2812_t *ws2812 = __containerof(strip, ws2812_t, parent); - STRIP_CHECK(index < ws2812->strip_len, "index out of the maximum number of leds", err, ESP_ERR_INVALID_ARG); - uint32_t start = index * 3; - // In thr order of GRB - ws2812->buffer[start + 0] = green & 0xFF; - ws2812->buffer[start + 1] = red & 0xFF; - ws2812->buffer[start + 2] = blue & 0xFF; - return ESP_OK; -err: - return ret; -} - -static esp_err_t ws2812_refresh(led_strip_t *strip, uint32_t timeout_ms) -{ - esp_err_t ret = ESP_OK; - ws2812_t *ws2812 = __containerof(strip, ws2812_t, parent); - STRIP_CHECK(rmt_write_sample(ws2812->rmt_channel, ws2812->buffer, ws2812->strip_len * 3, true) == ESP_OK, - "transmit RMT samples failed", err, ESP_FAIL); - return rmt_wait_tx_done(ws2812->rmt_channel, pdMS_TO_TICKS(timeout_ms)); -err: - return ret; -} - -static esp_err_t ws2812_clear(led_strip_t *strip, uint32_t timeout_ms) -{ - ws2812_t *ws2812 = __containerof(strip, ws2812_t, parent); - // Write zero to turn off all leds - memset(ws2812->buffer, 0, ws2812->strip_len * 3); - return ws2812_refresh(strip, timeout_ms); -} - -static esp_err_t ws2812_del(led_strip_t *strip) -{ - ws2812_t *ws2812 = __containerof(strip, ws2812_t, parent); - free(ws2812); - return ESP_OK; -} - -led_strip_t *led_strip_new_rmt_ws2812(const led_strip_config_t *config) -{ - led_strip_t *ret = NULL; - STRIP_CHECK(config, "configuration can't be null", err, NULL); - - // 24 bits per led - uint32_t ws2812_size = sizeof(ws2812_t) + config->max_leds * 3; - ws2812_t *ws2812 = calloc(1, ws2812_size); - STRIP_CHECK(ws2812, "request memory for ws2812 failed", err, NULL); - - uint32_t counter_clk_hz = 0; - STRIP_CHECK(rmt_get_counter_clock((rmt_channel_t)config->dev, &counter_clk_hz) == ESP_OK, - "get rmt counter clock failed", err, NULL); - // ns -> ticks - float ratio = (float)counter_clk_hz / 1e9; - ws2812_t0h_ticks = (uint32_t)(ratio * WS2812_T0H_NS); - ws2812_t0l_ticks = (uint32_t)(ratio * WS2812_T0L_NS); - ws2812_t1h_ticks = (uint32_t)(ratio * WS2812_T1H_NS); - ws2812_t1l_ticks = (uint32_t)(ratio * WS2812_T1L_NS); - - // set ws2812 to rmt adapter - rmt_translator_init((rmt_channel_t)config->dev, ws2812_rmt_adapter); - - ws2812->rmt_channel = (rmt_channel_t)config->dev; - ws2812->strip_len = config->max_leds; - - ws2812->parent.set_pixel = ws2812_set_pixel; - ws2812->parent.refresh = ws2812_refresh; - ws2812->parent.clear = ws2812_clear; - ws2812->parent.del = ws2812_del; - - return &ws2812->parent; -err: - return ret; -} |