139 lines
4.1 KiB
C
139 lines
4.1 KiB
C
/*
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* Copyright (c) 2019 Ruslan V. Uss <unclerus@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of itscontributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file tca95x5.c
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*
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* ESP-IDF driver for TCA9535/TCA9555 remote 16-bit I/O expanders for I2C-bus
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*
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* Copyright (c) 2019 Ruslan V. Uss <unclerus@gmail.com>
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*
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* BSD Licensed as described in the file LICENSE
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*/
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#include <esp_idf_lib_helpers.h>
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#include "tca95x5.h"
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#define I2C_FREQ_HZ 400000
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#define REG_IN0 0x00
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#define REG_OUT0 0x02
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#define REG_CONF0 0x06
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#define CHECK(x) do { esp_err_t __; if ((__ = x) != ESP_OK) return __; } while (0)
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#define CHECK_ARG(VAL) do { if (!(VAL)) return ESP_ERR_INVALID_ARG; } while (0)
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#define BV(x) (1 << (x))
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static esp_err_t read_reg_16(i2c_dev_t *dev, uint8_t reg, uint16_t *val)
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{
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CHECK_ARG(dev && val);
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I2C_DEV_TAKE_MUTEX(dev);
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I2C_DEV_CHECK(dev, i2c_dev_read_reg(dev, reg, val, 2));
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I2C_DEV_GIVE_MUTEX(dev);
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return ESP_OK;
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}
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static esp_err_t write_reg_16(i2c_dev_t *dev, uint8_t reg, uint16_t val)
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{
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CHECK_ARG(dev);
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I2C_DEV_TAKE_MUTEX(dev);
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I2C_DEV_CHECK(dev, i2c_dev_write_reg(dev, reg, &val, 2));
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I2C_DEV_GIVE_MUTEX(dev);
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return ESP_OK;
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}
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///////////////////////////////////////////////////////////////////////////////
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esp_err_t tca95x5_init_desc(i2c_dev_t *dev, uint8_t addr, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio)
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{
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CHECK_ARG(dev && (addr & TCA95X5_I2C_ADDR_BASE));
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dev->port = port;
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dev->addr = addr;
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dev->cfg.sda_io_num = sda_gpio;
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dev->cfg.scl_io_num = scl_gpio;
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#if HELPER_TARGET_IS_ESP32
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dev->cfg.master.clk_speed = I2C_FREQ_HZ;
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#endif
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return i2c_dev_create_mutex(dev);
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}
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esp_err_t tca95x5_free_desc(i2c_dev_t *dev)
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{
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CHECK_ARG(dev);
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return i2c_dev_delete_mutex(dev);
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}
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esp_err_t tca95x5_port_get_mode(i2c_dev_t *dev, uint16_t *mode)
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{
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return read_reg_16(dev, REG_CONF0, mode);
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}
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esp_err_t tca95x5_port_set_mode(i2c_dev_t *dev, uint16_t mode)
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{
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return write_reg_16(dev, REG_CONF0, mode);
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}
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esp_err_t tca95x5_port_read(i2c_dev_t *dev, uint16_t *val)
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{
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return read_reg_16(dev, REG_IN0, val);
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}
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esp_err_t tca95x5_port_write(i2c_dev_t *dev, uint16_t val)
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{
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return write_reg_16(dev, REG_OUT0, val);
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}
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esp_err_t tca95x5_get_level(i2c_dev_t *dev, uint8_t pin, uint32_t *val)
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{
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uint16_t v;
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CHECK(read_reg_16(dev, REG_IN0, &v));
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*val = v & BV(pin) ? 1 : 0;
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return ESP_OK;
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}
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esp_err_t tca95x5_set_level(i2c_dev_t *dev, uint8_t pin, uint32_t val)
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{
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uint16_t v;
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I2C_DEV_TAKE_MUTEX(dev);
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I2C_DEV_CHECK(dev, i2c_dev_read_reg(dev, REG_OUT0, &v, 2));
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v = (v & ~BV(pin)) | (val ? BV(pin) : 0);
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I2C_DEV_CHECK(dev, i2c_dev_write_reg(dev, REG_OUT0, &v, 2));
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I2C_DEV_GIVE_MUTEX(dev);
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return ESP_OK;
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}
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