Tue, 28 Mar 2023 11:25:46 +0200
Finished the BMP280 task.
/* * Copyright (c) 2021 Ruslan V. Uss <unclerus@gmail.com> * * 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. * 3. Neither the name of the copyright holder nor the names of itscontributors * may be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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. */ /** * @file pca9557.c * * ESP-IDF driver for PCA9537/PCA9557/TCA9534 remote 4/8-bit I/O expanders for I2C-bus * * Copyright (c) 2021 Ruslan V. Uss <unclerus@gmail.com> * * BSD Licensed as described in the file LICENSE */ #include <esp_idf_lib_helpers.h> #include "pca9557.h" #define I2C_FREQ_HZ 400000 #define REG_IN 0x00 #define REG_OUT 0x01 #define REG_POL 0x02 #define REG_CONF 0x03 #define CHECK(x) do { esp_err_t __; if ((__ = x) != ESP_OK) return __; } while (0) #define CHECK_ARG(VAL) do { if (!(VAL)) return ESP_ERR_INVALID_ARG; } while (0) static esp_err_t read_reg_8(i2c_dev_t *dev, uint8_t reg, uint8_t *val) { CHECK_ARG(dev && val); I2C_DEV_TAKE_MUTEX(dev); I2C_DEV_CHECK(dev, i2c_dev_read_reg(dev, reg, val, 1)); I2C_DEV_GIVE_MUTEX(dev); return ESP_OK; } static esp_err_t write_reg_8(i2c_dev_t *dev, uint8_t reg, uint8_t val) { CHECK_ARG(dev); I2C_DEV_TAKE_MUTEX(dev); I2C_DEV_CHECK(dev, i2c_dev_write_reg(dev, reg, &val, 1)); I2C_DEV_GIVE_MUTEX(dev); return ESP_OK; } static esp_err_t read_bit(i2c_dev_t *dev, uint8_t reg, uint8_t bit, uint32_t *val) { CHECK_ARG(dev && val); uint8_t v; CHECK(read_reg_8(dev, reg, &v)); *val = v & BIT(bit) ? 1 : 0; return ESP_OK; } static esp_err_t write_bit(i2c_dev_t *dev, uint8_t reg, uint8_t bit, uint32_t val) { CHECK_ARG(dev); uint8_t v; I2C_DEV_TAKE_MUTEX(dev); I2C_DEV_CHECK(dev, i2c_dev_read_reg(dev, reg, &v, 1)); v = (v & ~BIT(bit)) | (val ? BIT(bit) : 0); I2C_DEV_CHECK(dev, i2c_dev_write_reg(dev, reg, &v, 1)); I2C_DEV_GIVE_MUTEX(dev); return ESP_OK; } //////////////////////////////////////////////////////////////////////////////// esp_err_t pca9557_init_desc(i2c_dev_t *dev, uint8_t addr, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio) { CHECK_ARG(dev && ( (addr & PCA9557_I2C_ADDR_BASE) == PCA9557_I2C_ADDR_BASE || (addr & TCA9534_I2C_ADDR_BASE) == TCA9534_I2C_ADDR_BASE || addr == PCA9537_I2C_ADDR)); dev->port = port; dev->addr = addr; dev->cfg.sda_io_num = sda_gpio; dev->cfg.scl_io_num = scl_gpio; #if HELPER_TARGET_IS_ESP32 dev->cfg.master.clk_speed = I2C_FREQ_HZ; #endif return i2c_dev_create_mutex(dev); } esp_err_t pca9557_free_desc(i2c_dev_t *dev) { CHECK_ARG(dev); return i2c_dev_delete_mutex(dev); } esp_err_t pca9557_port_get_mode(i2c_dev_t *dev, uint8_t *mode) { return read_reg_8(dev, REG_CONF, mode); } esp_err_t pca9557_port_set_mode(i2c_dev_t *dev, uint8_t mode) { return write_reg_8(dev, REG_CONF, mode); } esp_err_t pca9557_port_get_polarity(i2c_dev_t *dev, uint8_t *pol) { return read_reg_8(dev, REG_POL, pol); } esp_err_t pca9557_port_set_polarity(i2c_dev_t *dev, uint8_t pol) { return write_reg_8(dev, REG_POL, pol); } esp_err_t pca9557_port_read(i2c_dev_t *dev, uint8_t *val) { return read_reg_8(dev, REG_IN, val); } esp_err_t pca9557_port_write(i2c_dev_t *dev, uint8_t val) { return write_reg_8(dev, REG_OUT, val); } esp_err_t pca9557_get_mode(i2c_dev_t *dev, uint8_t pin, pca9557_mode_t *mode) { return read_bit(dev, REG_CONF, pin, (uint32_t *)mode); } esp_err_t pca9557_set_mode(i2c_dev_t *dev, uint8_t pin, pca9557_mode_t mode) { return write_bit(dev, REG_CONF, pin, mode); } esp_err_t pca9557_get_level(i2c_dev_t *dev, uint8_t pin, uint32_t *val) { return read_bit(dev, REG_IN, pin, val); } esp_err_t pca9557_set_level(i2c_dev_t *dev, uint8_t pin, uint32_t val) { return write_bit(dev, REG_OUT, pin, val); }