135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/****************************************************************************
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* boards/xtensa/esp32/ttgo_eink5_v2/src/esp32_ledc.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 <sys/types.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include <nuttx/timers/pwm.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "esp32_ledc.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: esp32_pwm_setup
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*
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* Description:
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* Initialize LEDC PWM and register the PWM device.
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*
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****************************************************************************/
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int esp32_pwm_setup(void)
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{
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int ret;
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struct pwm_lowerhalf_s *pwm;
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#ifdef CONFIG_ESP32_LEDC_TIM0
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pwm = esp32_ledc_init(0);
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if (!pwm)
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{
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syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 0 lower half\n");
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return -ENODEV;
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}
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/* Register the PWM driver at "/dev/pwm0" */
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ret = pwm_register("/dev/pwm0", pwm);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
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return ret;
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}
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#endif
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#ifdef CONFIG_ESP32_LEDC_TIM1
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pwm = esp32_ledc_init(1);
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if (!pwm)
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{
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syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 1 lower half\n");
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return -ENODEV;
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}
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/* Register the PWM driver at "/dev/pwm1" */
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ret = pwm_register("/dev/pwm1", pwm);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
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return ret;
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}
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#endif
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#ifdef CONFIG_ESP32_LEDC_TIM2
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pwm = esp32_ledc_init(2);
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if (!pwm)
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{
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syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 2 lower half\n");
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return -ENODEV;
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}
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/* Register the PWM driver at "/dev/pwm2" */
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ret = pwm_register("/dev/pwm2", pwm);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
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return ret;
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}
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#endif
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#ifdef CONFIG_ESP32_LEDC_TIM3
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pwm = esp32_ledc_init(3);
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if (!pwm)
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{
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syslog(LOG_ERR, "ERROR: Failed to get the LEDC PWM 3 lower half\n");
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return -ENODEV;
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}
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/* Register the PWM driver at "/dev/pwm3" */
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ret = pwm_register("/dev/pwm3", pwm);
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if (ret < 0)
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{
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syslog(LOG_ERR, "ERROR: pwm_register failed: %d\n", ret);
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return ret;
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}
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#endif
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return OK;
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}
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