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Software for White Rabbit PTP Core
Commit bdb96ef3 authored by Peter Jansweijer's avatar Peter Jansweijer
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add device pca9544

parent 49d0ef74
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dev/dev.mk
View file @ bdb96ef3
......@@ -18,6 +18,7 @@ obj-$(CONFIG_EMBEDDED_NODE) += \
dev/spi_flash.o \
dev/iuart.o \
dev/ltc695x.o \
dev/pca9554.o \
dev/ad9520.o \
dev/i2c_eeprom.o \
dev/sdbfs.o \
......
dev/pca9554.c 0 → 100755
View file @ bdb96ef3
/*
* This work is part of the White Rabbit project
*
* Copyright (C) 2019 CERN (www.cern.ch)
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include "wrc.h"
#include "dev/i2c.h"
#include "dev/pca9554.h"
uint8_t pca9554_read_reg( struct pca9554_gpio_device *dev, uint8_t reg )
{
uint8_t rv;
int err = 0;
bb_i2c_start(dev->bus);
err |= bb_i2c_put_byte(dev->bus, dev->i2c_addr << 1);
bb_i2c_put_byte(dev->bus, reg );
bb_i2c_repeat_start(dev->bus );
err |= bb_i2c_put_byte(dev->bus, (dev->i2c_addr << 1) | 1);
bb_i2c_get_byte(dev->bus, &rv, 1 );
bb_i2c_stop(dev->bus);
if( err )
{
board_dbg("pca9554 not responding [addr = 0x%x]!\n", dev->i2c_addr );
}
return rv;
}
void pca9554_write_reg( struct pca9554_gpio_device *dev, uint8_t reg, uint8_t value )
{
bb_i2c_start(dev->bus);
bb_i2c_put_byte(dev->bus, dev->i2c_addr << 1);
bb_i2c_put_byte(dev->bus, reg );
bb_i2c_put_byte(dev->bus, value );
bb_i2c_stop(dev->bus);
}
void pca9554_gpio_out(const struct gpio_pin *pin, int value)
{
struct pca9554_gpio_device* dev = ( struct pca9554_gpio_device* ) pin->device->priv;
uint8_t oreg = pca9554_read_reg( dev, PCA9554_REG_OUT );
if( value )
oreg |= ( 1<< pin->pin );
else
oreg &= ~ ( 1<< pin->pin );
pca9554_write_reg( dev, PCA9554_REG_OUT, oreg );
}
void pca9554_gpio_set_dir(const struct gpio_pin *pin, int dir)
{
struct pca9554_gpio_device* dev = ( struct pca9554_gpio_device* ) pin->device->priv;
uint8_t dreg = pca9554_read_reg( dev, PCA9554_REG_CONFIG );
if( ! dir )
dreg |= ( 1<< pin->pin );
else
dreg &= ~ ( 1<< pin->pin );
pca9554_write_reg( dev, PCA9554_REG_CONFIG, dreg );
}
int pca9554_gpio_in(const struct gpio_pin *pin)
{
//struct pca9554_gpio_device* dev = ( struct pca9554_gpio_device* ) pin->device->priv;
// fixme: implement
return 0;
}
void pca9554_gpio_init( struct pca9554_gpio_device *dev, struct i2c_bus *bus, uint8_t i2c_addr )
{
dev->bus = bus;
dev->i2c_addr = i2c_addr;
dev->gpio.priv = (void *) dev;
dev->gpio.read_pin = pca9554_gpio_in;
dev->gpio.set_dir = pca9554_gpio_set_dir;
dev->gpio.set_out = pca9554_gpio_out;
}
include/dev/pca9554.h 0 → 100755
View file @ bdb96ef3
/*
* This work is part of the White Rabbit project
*
* Copyright (C) 2019 CERN (www.cern.ch)
* Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __PCA9554_H
#define __PCA9554_H
#include <stdint.h>
#include "dev/bb_i2c.h"
#include "dev/gpio.h"
#define PCA9554_REG_IN 0
#define PCA9554_REG_OUT 1
#define PCA9554_REG_INVERT 2
#define PCA9554_REG_CONFIG 3
struct pca9554_gpio_device
{
struct i2c_bus *bus;
uint8_t i2c_addr;
struct gpio_device gpio;
};
uint8_t pca9554_read_reg( struct pca9554_gpio_device *dev, uint8_t reg );
void pca9554_write_reg( struct pca9554_gpio_device *dev, uint8_t reg, uint8_t value );
void pca9554_gpio_out(const struct gpio_pin *pin, int value);
void pca9554_gpio_set_dir(const struct gpio_pin *pin, int dir);
int pca9554_gpio_in(const struct gpio_pin *pin);
void pca9554_gpio_init( struct pca9554_gpio_device *dev, struct i2c_bus *bus, uint8_t i2c_addr );
#endif
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