142 lines
4.9 KiB
C
142 lines
4.9 KiB
C
/****************************************************************************
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* include/nuttx/leds/ncp5623c.h
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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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#ifndef __INCLUDE_NUTTX_LEDS_NCP5623C_H
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#define __INCLUDE_NUTTX_LEDS_NCP5623C_H
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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 <nuttx/fs/ioctl.h>
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/* Configuration
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* CONFIG_I2C - Enables support for I2C drivers
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* CONFIG_NCP5623C - Enables support for the NCP5623C driver
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*/
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#if defined(CONFIG_I2C) && defined(CONFIG_NCP5623C)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* I2C definitions */
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#define I2C_BUS_FREQ_HZ (400000)
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/* NCP5623C register addresses */
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#define NCP5623C_SHUTDOWN (0x00) /* System Shut Down */
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#define NCP5623C_ILED (0x1) /* ILED current */
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#define NCP5623C_PWM1 (0x2) /* LED 1 brightness control */
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#define NCP5623C_PWM2 (0x3) /* LED 2 brightness control */
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#define NCP5623C_PWM3 (0x4) /* LED 3 brightness control */
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#define NCP5623C_UPWARD (0x5) /* Set Up the IEND Upward */
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#define NCP5623C_DWNWRD (0x6) /* Set Up the IEND Downward */
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#define NCP5623C_GRAD (0x7) /* Set Up the Gradual Dimming */
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#define NCP5623C_MAX_REG (0x7) /* Highest register */
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#define NCP5623C_ADDRESS_MASK (0xe0) /* Address part of reg */
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#define NCP5623C_VALUE_MASK (0x1f) /* Value part of reg */
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#define NCP5623C_SHIFT_ADDRESS (5)
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#define NCP5623C_MAX_VALUE (0x1f) /* Max value of all registers */
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#define NCP5623C_SET_REG(addr, val) \
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(((addr << NCP5623C_SHIFT_ADDRESS) & NCP5623C_ADDRESS_MASK) | \
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(val & NCP5623C_VALUE_MASK)) /* combine addr and val */
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/* IOCTL commands */
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#define LEDIOC_SET_REG _ULEDIOC(1) /* Arg: ncp5623c_set_reg_s * pointer */
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/****************************************************************************
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* Public Types
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****************************************************************************/
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enum led_select_e
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{
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LED_1 = NCP5623C_PWM1,
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LED_2 = NCP5623C_PWM2,
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LED_3 = NCP5623C_PWM3
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};
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/* This structure is used in an IOCTL command for setting the PWM of an
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* individual LED. The desired LED is selected by setting the 'led' parameter
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* accordingly whereas the 'led_pwm' field governs the brightness of the
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* selected LED. A value of 0 (0x00) leads to a duty cycle of 0 % = LED off
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* while a value of 255 (0xFF) leads to a duty cycle of 99.6 % = Maximum
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* brightness.
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*/
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struct ncp5623c_set_reg_s
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{
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uint8_t reg;
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uint8_t val;
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};
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/****************************************************************************
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* Forward declarations
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****************************************************************************/
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struct i2c_master_s;
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: ncp5623c_register
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*
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* Description:
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* Register the NCP5623C device as 'devpath'
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*
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* Input Parameters:
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* devpath - The full path to the driver to register. E.g., "/dev/leddrv0".
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* i2c - An instance of the I2C interface to use to communicate
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* with the LM92.
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* ncp5623c_i2c_addr
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* - The I2C address of the NCP5623C.
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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 ncp5623c_register(FAR const char *devpath, FAR struct i2c_master_s *i2c,
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uint8_t const ncp5623c_i2c_addr);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_I2C && CONFIG_I2C_NCP5623C */
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#endif /* __INCLUDE_NUTTX_LEDS_NCP5623C_H */
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