mirror of
https://github.com/apache/nuttx.git
synced 2026-05-28 11:56:10 +08:00
drivers/ioexpander: Add support for PCA9557
Datasheet: https://www.ti.com/lit/ds/symlink/pca9557.pdf Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
This commit is contained in:
wangjianyu3
committed by
Alan C. Assis
Alan C. Assis
parent
5c2cfe8bac
commit
b73d7f2922
@@ -312,6 +312,37 @@ config PCA9538_RETRY
|
||||
|
||||
endif # IOEXPANDER_PCA9538
|
||||
|
||||
config IOEXPANDER_PCA9557
|
||||
bool "PCA9557 I2C IO expander"
|
||||
default n
|
||||
depends on I2C
|
||||
---help---
|
||||
Enable support for the NXP PCA9557 IO Expander
|
||||
|
||||
if IOEXPANDER_PCA9557
|
||||
|
||||
config PCA9557_SHADOW_MODE
|
||||
bool "Use Shadow Mode instead of Read-Modify-Write Operations"
|
||||
default n
|
||||
---help---
|
||||
This setting enables a mode where the output and pin
|
||||
configuration registers are held in RAM.
|
||||
With this for example we do not need to read back the
|
||||
output-register every time we want to change one pin.
|
||||
We do instead change the bit in the internal register
|
||||
and then just write this register to the IO-Expander.
|
||||
This reduces bus traffic and eliminates the problem of
|
||||
EMC-caused toggling of output pins.
|
||||
|
||||
config PCA9557_RETRY
|
||||
bool "Retry to send commands and data at I2C communication errors"
|
||||
default n
|
||||
---help---
|
||||
Retry to send commands and data if a I2C-communication
|
||||
error occurs (eg. caused by EMC).
|
||||
|
||||
endif # IOEXPANDER_PCA9557
|
||||
|
||||
config IOEXPANDER_TCA64XX
|
||||
bool "TCA64XX I2C IO expander"
|
||||
default n
|
||||
|
||||
@@ -54,6 +54,10 @@ ifeq ($(CONFIG_IOEXPANDER_PCA9538),y)
|
||||
CSRCS += pca9538.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_IOEXPANDER_PCA9557),y)
|
||||
CSRCS += pca9557.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_IOEXPANDER_TCA64XX),y)
|
||||
CSRCS += tca64xx.c
|
||||
endif
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,96 @@
|
||||
/****************************************************************************
|
||||
* drivers/ioexpander/pca9557.h
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||
* contributor license agreements. See the NOTICE file distributed with
|
||||
* this work for additional information regarding copyright ownership. The
|
||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
||||
* "License"); you may not use this file except in compliance with the
|
||||
* License. You may obtain a copy of the License at
|
||||
*
|
||||
* http://www.apache.org/licenses/LICENSE-2.0
|
||||
*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||||
* License for the specific language governing permissions and limitations
|
||||
* under the License.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
#ifndef __DRIVERS_IOEXPANDER_PCA9557_H
|
||||
#define __DRIVERS_IOEXPANDER_PCA9557_H
|
||||
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <nuttx/wdog.h>
|
||||
#include <nuttx/clock.h>
|
||||
#include <nuttx/mutex.h>
|
||||
#include <nuttx/wqueue.h>
|
||||
#include <nuttx/ioexpander/ioexpander.h>
|
||||
#include <nuttx/ioexpander/pca9557.h>
|
||||
|
||||
#include <nuttx/i2c/i2c_master.h>
|
||||
#include <nuttx/irq.h>
|
||||
|
||||
#if defined(CONFIG_IOEXPANDER) && defined(CONFIG_IOEXPANDER_PCA9557)
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/* Configuration ************************************************************/
|
||||
|
||||
/* Prerequisites:
|
||||
* CONFIG_I2C
|
||||
* I2C support is required
|
||||
* CONFIG_IOEXPANDER
|
||||
* Enables support for the PCA9557 I/O expander
|
||||
*
|
||||
* CONFIG_IOEXPANDER_PCA9557
|
||||
* Enables support for the PCA9557 driver (Needs CONFIG_INPUT)
|
||||
*/
|
||||
|
||||
/* PCA9557 Resources ********************************************************/
|
||||
|
||||
#define PCA9557_GPIO_NPINS 8
|
||||
#define PCA9557_MAXDEVS 8
|
||||
|
||||
/* I2C frequency */
|
||||
|
||||
#define PCA9557_I2C_MAXFREQUENCY 400000 /* 400KHz */
|
||||
|
||||
/* PCA9557 Registers ********************************************************/
|
||||
|
||||
#define PCA9557_REG_NUM 4
|
||||
#define PCA9557_REG_INPUT 0x00
|
||||
#define PCA9557_REG_OUTPUT 0x01
|
||||
#define PCA9557_REG_POLINV 0x02
|
||||
#define PCA9557_REG_CONFIG 0x03
|
||||
|
||||
/****************************************************************************
|
||||
* Public Types
|
||||
****************************************************************************/
|
||||
|
||||
/* This structure represents the state of the PCA9557 driver */
|
||||
|
||||
struct pca9557_dev_s
|
||||
{
|
||||
struct ioexpander_dev_s dev; /* Nested structure to allow casting
|
||||
* as public gpio expander. */
|
||||
#ifdef CONFIG_PCA9557_SHADOW_MODE
|
||||
uint8_t sreg[PCA9557_REG_NUM]; /* Shadowed registers */
|
||||
#endif
|
||||
FAR struct pca9557_config_s *config; /* Board configuration data */
|
||||
FAR struct i2c_master_s *i2c; /* Saved I2C driver instance */
|
||||
rmutex_t lock; /* Mutual exclusion */
|
||||
};
|
||||
|
||||
#endif /* CONFIG_IOEXPANDER && CONFIG_IOEXPANDER_PCA9557 */
|
||||
#endif /* __DRIVERS_IOEXPANDER_PCA9557_H */
|
||||
Reference in New Issue
Block a user