97 lines
4.7 KiB
C
97 lines
4.7 KiB
C
/* $NetBSD: mcp23s17.h,v 1.1 2014/04/06 17:59:39 kardel Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2014 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Frank Kardel.
|
|
*
|
|
* 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 MCP23S17_H
|
|
#define MCP23S17_H
|
|
|
|
/*
|
|
* SPI connected 16-bit general purpose parallel I/O
|
|
*
|
|
* see http://ww1.microchip.com/downloads/en/DeviceDoc/21952b.pdf
|
|
*/
|
|
|
|
/* resources */
|
|
#define MCP23x17_GPIO_NPINS 16
|
|
#define MCP23x17_GPIO_NPINS_MASK (MCP23x17_GPIO_NPINS-1)
|
|
|
|
/* address layout */
|
|
#define MCP23x17_BANKADDR(BANK, ADDR, PORT) (((BANK) == 1) ? ((PORT) << 4 | (ADDR)) : ((ADDR)<<1 | (PORT)))
|
|
|
|
#define MCP23x17_IODIR(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x0, PORT)
|
|
#define MCP23x17_IODIRA(BANK) MCP23x17_IODIR(BANK, 0)
|
|
#define MCP23x17_IODIRB(BANK) MCP23x17_IODIR(BANK, 1)
|
|
#define MCP23x17_IPOL(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x1, PORT)
|
|
#define MCP23x17_IPOLA(BANK) MCP23x17_IPOL(BANK, 0)
|
|
#define MCP23x17_IPOLB(BANK) MCP23x17_IPOL(BANK, 1)
|
|
#define MCP23x17_GPINTEN(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x2, PORT)
|
|
#define MCP23x17_GPINTENA(BANK) MCP23x17_GPINTEN(BANK, 0)
|
|
#define MCP23x17_GPINTENB(BANK) MCP23x17_GPINTEN(BANK, 1)
|
|
#define MCP23x17_DEFVAL(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x3, PORT)
|
|
#define MCP23x17_DEFVALA(BANK) MCP23x17_DEFVAL(BANK, 0)
|
|
#define MCP23x17_DEFVALB(BANK) MCP23x17_DEFVAL(BANK, 1)
|
|
#define MCP23x17_INTCON(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x4, PORT)
|
|
#define MCP23x17_INTCONA(BANK) MCP23x17_INTCON(BANK, 0)
|
|
#define MCP23x17_INTCONB(BANK) MCP23x17_INTCON(BANK, 0)
|
|
#define MCP23x17_IOCON(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x5, PORT)
|
|
#define MCP23x17_IOCONA(BANK) MCP23x17_IOCON(BANK, 0)
|
|
#define MCP23x17_IOCONB(BANK) MCP23x17_IOCON(BANK, 1)
|
|
#define MCP23x17_GPPU(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x6, PORT)
|
|
#define MCP23x17_GPPUA(BANK) MCP23x17_GPPU(BANK, 0)
|
|
#define MCP23x17_GPPUB(BANK) MCP23x17_GPPU(BANK, 1)
|
|
#define MCP23x17_INTF(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x7, PORT)
|
|
#define MCP23x17_INTFA(BANK) MCP23x17_INTF(BANK, 0)
|
|
#define MCP23x17_INTFB(BANK) MCP23x17_INTF(BANK, 1)
|
|
#define MCP23x17_INTCAP(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x8, PORT)
|
|
#define MCP23x17_INTCAPA(BANK) MCP23x17_INTCAP(BANK, 0)
|
|
#define MCP23x17_INTCAPB(BANK) MCP23x17_INTCAP(BANK, 1)
|
|
#define MCP23x17_GPIO(BANK, PORT) MCP23x17_BANKADDR(BANK, 0x9, PORT)
|
|
#define MCP23x17_GPIOA(BANK) MCP23x17_GPIO(BANK, 0)
|
|
#define MCP23x17_GPIOB(BANK) MCP23x17_GPIO(BANK, 1)
|
|
#define MCP23x17_OLAT(BANK, PORT) MCP23x17_BANKADDR(BANK, 0xA, PORT)
|
|
#define MCP23x17_OLATA(BANK) MCP23x17_OLAT(BANK, 0)
|
|
#define MCP23x17_OLATB(BANK) MCP23x17_OLAT(BANK, 1)
|
|
|
|
/* commands */
|
|
#define MCP23x17_OP_BASE_WR 0x40 /* write register */
|
|
#define MCP23x17_OP_BASE_RD 0x41 /* read register */
|
|
#define MCP23x17_OP_READ(HA) (MCP23x17_OP_BASE_RD|(HA)<<1)
|
|
#define MCP23x17_OP_WRITE(HA) (MCP23x17_OP_BASE_WR|(HA)<<1)
|
|
|
|
/* bits */
|
|
#define MCP23x17_IOCON_BANK __BIT(7) /* select address layout */
|
|
#define MCP23x17_IOCON_MIRROR __BIT(6) /* mirror INTA/INTB interrupt outputs */
|
|
#define MCP23x17_IOCON_SEQOP __BIT(5) /* sequential address operation */
|
|
#define MCP23x17_IOCON_DISLW __BIT(4) /* slew rate SDA output */
|
|
#define MCP23x17_IOCON_HAEN __BIT(3) /* hardware address enable bit (only MCP23S17) */
|
|
#define MCP23x17_IOCON_ODR __BIT(2) /* configure INT pin as open drain */
|
|
#define MCP23x17_IOCON_INTPOL __BIT(1) /* INT pin polarity (unless ODR is set) */
|
|
|
|
#endif
|