117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/****************************************************************************
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* boards/xtensa/esp32s3/esp32s3-lcd-ev/src/esp32s3_ws2812.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <stdio.h>
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#include "xtensa.h"
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#include "esp32s3_spi.h"
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#include <nuttx/kmalloc.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/leds/ws2812.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define APB_PERIOD (12.5)
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#define T0H ((uint16_t)(350 / APB_PERIOD)) // ns
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#define T0L ((uint16_t)(900 / APB_PERIOD)) // ns
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#define T1H ((uint16_t)(900 / APB_PERIOD)) // ns
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#define T1L ((uint16_t)(350 / APB_PERIOD)) // ns
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#define RES ((uint16_t)(60000 / APB_PERIOD)) // ns
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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#ifndef CONFIG_WS2812_NON_SPI_DRIVER
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/****************************************************************************
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* Name: board_ws2812_initialize
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*
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* Description:
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* Initialize and register the WS2812 LED driver.
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*
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* Input Parameters:
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* devno - The device number, used to build the device path as /dev/leddrvN
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* spino - SPI port number
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* nleds - number of LEDs
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int board_ws2812_initialize(int devno, int spino, uint16_t nleds)
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{
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struct spi_dev_s *spi;
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char devpath[13];
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int ret;
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spi = esp32s3_spibus_initialize(spino);
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if (spi == NULL)
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{
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return -ENODEV;
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}
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/* Register the WS2812 driver at the specified location. */
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snprintf(devpath, sizeof(devpath), "/dev/leds%d", devno);
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ret = ws2812_leds_register(devpath, spi, nleds);
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if (ret < 0)
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{
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lederr("ERROR: ws2812_leds_register(%s) failed: %d\n",
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devpath, ret);
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return ret;
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}
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return OK;
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}
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#endif
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