NetBSD/sys/dev/i2c/pca9685reg.h

161 lines
5.0 KiB
C

/* $NetBSD: pca9685reg.h,v 1.1 2019/07/24 05:25:32 thorpej Exp $ */
/*-
* Copyright (c) 2018 Jason R. Thorpe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef pca9685reg_h_included
#define pca9685reg_h_included
/*
* Hardware definitions for the NXP PCA9685 16-channel, 12-bit PWM FM+
* I2C-bus LED controller.
*/
#define PCA9685_NCHANNELS 16
/*
* PCA9685 i2c addresses.
*/
/* Default all-call address. */
#define PCA9685_I2CADDR_ALLCALL_DEFAULT 0x70
/* Default sub-addresses. */
#define PCA9685_I2CADDR_SUBADR1_DEFAULT 0x71
#define PCA9685_I2CADDR_SUBADR2_DEFAULT 0x72
#define PCA9685_I2CADDR_SUBADR3_DEFAULT 0x74
/*
* The PCA9685 has 6 address select pins, which must be
* pulled up or down to select the device's address. The
* selected slave address is:
*
* 1 A5 A4 A3 A2 A1 A0
*
* There are some addresses, however, that cannot be selected
* even if they fall into the selectable range:
*
* - Default all-call address (0x70)
* - 10-bit slave address prefix (0x78)
* - Reserved for future purposes address (0x7c)
*
* Use of sub-addresses to control groups of devices also limits
* the available individual slave addresses.
*/
#define PCA9685_I2CADDR_MIN 0x40
#define PCA9685_I2CADDR_MAX 0x7f
#define PCA9685_I2CADDR_BLACKLIST { 0x78, 0x7c }
/*
* PCA9685 has an internal 25MHz oscillator. The maximum external
* reference clock frequency is 50MHz.
*/
#define PCA9685_INTERNAL_FREQ 25000000
#define PCA9685_EXTERNAL_FREQ_MAX 50000000
/*
* Data sheet sez:
*
* Maximum PWM frequency is 1526Hz -- prescale == 0x03.
* Minimum PWM frequency is 24Hz -- prescale == 0xff.
*/
#define PCA9685_FREQ_MIN 24
#define PCA9685_FREQ_MAX 1526
#define PCA9685_PRESCALE_MIN 0x03
#define PCA9685_PRESCALE_MAX 0xff
/*
* The PCA9685 pulse counter has a 12-bit resolution (4096 ticks).
*/
#define PCA9685_PWM_TICKS 4096
/*
* PCA9685 register definitions.
*/
/* Mode register 1 */
#define PCA9685_MODE1 0x00
#define MODE1_ALLCALL 0x01 /* responds to LED All Call address */
#define MODE1_SUB3 0x02 /* responds to subaddress 3 */
#define MODE1_SUB2 0x04 /* responds to subaddress 2 */
#define MODE1_SUB1 0x08 /* responds to subaddress 1 */
#define MODE1_SLEEP 0x10 /* 1 = low power mode, oscillator off */
#define MODE1_AI 0x20 /* register auto-increment enabled */
#define MODE1_EXTCLK 0x40 /* external oscillatior enable */
#define MODE1_RESTART 0x80 /* restart enabled */
/* Mode register 2 */
#define PCA9685_MODE2 0x01
#define MODE2_OUTNE_MASK 0x03 /* see data sheet */
#define MODE2_OUTDRV 0x04 /* 0 = open-drain, 1 = totem pole */
#define MODE2_OCH 0x08 /* outputs change: 0 = STOP, 1 = ACK */
#define MODE2_INVRT 0x10 /* Output logic state inverted */
/* I2C subaddress 1 */
#define PCA9685_SUBADR1 0x02
/* I2C subaddress 2 */
#define PCA9685_SUBADR2 0x03
/* I2C subaddress 3 */
#define PCA9685_SUBADR3 0x04
/* LED All Call address */
#define PCA9685_ALLCALLADR 0x05
/* LEDx output and brightness control byte 0 */
#define PCA9685_LEDx_ON_L(x) (0x06 + ((x) * 4))
/* LEDx output and brightness control byte 1 */
#define PCA9685_LEDx_ON_H(x) (0x07 + ((x) * 4))
/* LEDx output and brightness control byte 2 */
#define PCA9685_LEDx_OFF_L(x) (0x08 + ((x) * 4))
/* LEDx output and brightness control byte 3 */
#define PCA9685_LEDx_OFF_H(x) (0x09 + ((x) * 4))
/* Load all LEDx_ON registers byte 0 */
#define PCA9685_ALL_LED_ON_L 0xfa
/* Load all LEDx_ON registers byte 1 */
#define PCA9685_ALL_LED_ON_H 0xfb
/* Load all LEDx_OFF registers byte 0 */
#define PCA9685_ALL_LED_OFF_L 0xfc
/* Load all LEDx_OFF registers byte 1 */
#define PCA9685_ALL_LED_OFF_H 0xfd
/* Prescaler for PWM output frequency */
#define PCA9685_PRE_SCALE 0xfe
/* Test mode */
#define PCA9685_TEST_MODE 0xff
#endif /* pca9685reg_h_included */