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8a9e3a7dbef589a54f814ff22e9121da86bce19d0e1ccffa53f5df6bb346a140

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idf_component_register(SRCS "esp_io_expander_tca9554.c" INCLUDE_DIRS "include" REQUIRES "driver")

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# ESP IO Expander Chip TCA9554(A)
[![Component Registry](https://components.espressif.com/components/espressif/esp_io_expander_tca9554/badge.svg)](https://components.espressif.com/components/espressif/esp_io_expander_tca9554)
Implementation of the TCA9554 io expander chip with esp_io_expander component.
| Chip | Communication interface | Component name | Link to datasheet |
| :--------------: | :---------------------: | :------------: | :---------------: |
| TCA9554(A) | I2C | esp_io_expander_tca9554 | [datasheet](https://www.ti.com/lit/gpn/tca9554) |
## Add to project
Packages from this repository are uploaded to [Espressif's component service](https://components.espressif.com/).
You can add them to your project via `idf.py add-dependency`, e.g.
```
idf.py add-dependency esp_io_expander_tca9554==1.0.0
```
Alternatively, you can create `idf_component.yml`. More is in [Espressif's documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
## Example use
Creation of the i2c bus.
```c
i2c_master_bus_handle_t i2c_handle = NULL;
const i2c_master_bus_config_t bus_config = {
.i2c_port = I2C_NUM_0,
.sda_io_num = 47,
.scl_io_num = 48,
.clk_source = I2C_CLK_SRC_DEFAULT,
};
i2c_new_master_bus(&bus_config, &i2c_handle);
```
Creation of the component.
```c
esp_io_expander_handle_t io_expander = NULL;
esp_io_expander_new_i2c_tca9554(i2c_handle, ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_000, &io_expander);
```
Print all pins's status to the log:
```c
esp_io_expander_print_state(io_expander);
```
Set pin 0 and pin 1 with output dircetion and low level:
```c
esp_io_expander_set_dir(io_expander, IO_EXPANDER_PIN_NUM_0 | IO_EXPANDER_PIN_NUM_1, IO_EXPANDER_OUTPUT);
esp_io_expander_set_level(io_expander, IO_EXPANDER_PIN_NUM_0 | IO_EXPANDER_PIN_NUM_1, 0);
```
Set pin 2 and pin 3 with input dircetion:
```c
uint32_t pin_levels = 0;
esp_io_expander_set_dir(io_expander, IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, IO_EXPANDER_INPUT);
esp_io_expander_get_level(io_expander, IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3, &pin_levels);
```

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/*
* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <inttypes.h>
#include <string.h>
#include <stdlib.h>
#include "esp_bit_defs.h"
#include "esp_check.h"
#include "esp_log.h"
#include "esp_io_expander.h"
#include "esp_io_expander_tca9554.h"
/* I2C communication related */
#define I2C_TIMEOUT_MS (1000)
#define I2C_CLK_SPEED (400000)
#define IO_COUNT (8)
/* Register address */
#define INPUT_REG_ADDR (0x00)
#define OUTPUT_REG_ADDR (0x01)
#define DIRECTION_REG_ADDR (0x03)
/* Default register value on power-up */
#define DIR_REG_DEFAULT_VAL (0xff)
#define OUT_REG_DEFAULT_VAL (0xff)
/**
* @brief Device Structure Type
*
*/
typedef struct {
esp_io_expander_t base;
i2c_master_dev_handle_t i2c_handle;
struct {
uint8_t direction;
uint8_t output;
} regs;
} esp_io_expander_tca9554_t;
static char *TAG = "tca9554";
static esp_err_t read_input_reg(esp_io_expander_handle_t handle, uint32_t *value);
static esp_err_t write_output_reg(esp_io_expander_handle_t handle, uint32_t value);
static esp_err_t read_output_reg(esp_io_expander_handle_t handle, uint32_t *value);
static esp_err_t write_direction_reg(esp_io_expander_handle_t handle, uint32_t value);
static esp_err_t read_direction_reg(esp_io_expander_handle_t handle, uint32_t *value);
static esp_err_t reset(esp_io_expander_t *handle);
static esp_err_t del(esp_io_expander_t *handle);
esp_err_t esp_io_expander_new_i2c_tca9554(i2c_master_bus_handle_t i2c_bus, uint32_t dev_addr, esp_io_expander_handle_t *handle_ret)
{
ESP_RETURN_ON_FALSE(handle_ret != NULL, ESP_ERR_INVALID_ARG, TAG, "Invalid handle_ret");
// Allocate memory for driver object
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)calloc(1, sizeof(esp_io_expander_tca9554_t));
ESP_RETURN_ON_FALSE(tca9554 != NULL, ESP_ERR_NO_MEM, TAG, "Malloc failed");
// Add new I2C device
esp_err_t ret = ESP_OK;
const i2c_device_config_t i2c_dev_cfg = {
.device_address = dev_addr,
.scl_speed_hz = I2C_CLK_SPEED,
};
ESP_GOTO_ON_ERROR(i2c_master_bus_add_device(i2c_bus, &i2c_dev_cfg, &tca9554->i2c_handle), err, TAG, "Add new I2C device failed");
tca9554->base.config.io_count = IO_COUNT;
tca9554->base.config.flags.dir_out_bit_zero = 1;
tca9554->base.read_input_reg = read_input_reg;
tca9554->base.write_output_reg = write_output_reg;
tca9554->base.read_output_reg = read_output_reg;
tca9554->base.write_direction_reg = write_direction_reg;
tca9554->base.read_direction_reg = read_direction_reg;
tca9554->base.del = del;
tca9554->base.reset = reset;
/* Reset configuration and register status */
ESP_GOTO_ON_ERROR(reset(&tca9554->base), err, TAG, "Reset failed");
*handle_ret = &tca9554->base;
return ESP_OK;
err:
free(tca9554);
return ret;
}
static esp_err_t read_input_reg(esp_io_expander_handle_t handle, uint32_t *value)
{
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)__containerof(handle, esp_io_expander_tca9554_t, base);
uint8_t temp = 0;
ESP_RETURN_ON_ERROR(i2c_master_transmit_receive(tca9554->i2c_handle, (uint8_t[]) {
INPUT_REG_ADDR
}, 1, &temp, sizeof(temp), I2C_TIMEOUT_MS), TAG, "Read input reg failed");
*value = temp;
return ESP_OK;
}
static esp_err_t write_output_reg(esp_io_expander_handle_t handle, uint32_t value)
{
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)__containerof(handle, esp_io_expander_tca9554_t, base);
value &= 0xff;
uint8_t data[] = {OUTPUT_REG_ADDR, value};
ESP_RETURN_ON_ERROR(i2c_master_transmit(tca9554->i2c_handle, data, sizeof(data), I2C_TIMEOUT_MS), TAG, "Write output reg failed");
tca9554->regs.output = value;
return ESP_OK;
}
static esp_err_t read_output_reg(esp_io_expander_handle_t handle, uint32_t *value)
{
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)__containerof(handle, esp_io_expander_tca9554_t, base);
*value = tca9554->regs.output;
return ESP_OK;
}
static esp_err_t write_direction_reg(esp_io_expander_handle_t handle, uint32_t value)
{
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)__containerof(handle, esp_io_expander_tca9554_t, base);
value &= 0xff;
uint8_t data[] = {DIRECTION_REG_ADDR, value};
ESP_RETURN_ON_ERROR(i2c_master_transmit(tca9554->i2c_handle, data, sizeof(data), I2C_TIMEOUT_MS), TAG, "Write direction reg failed");
tca9554->regs.direction = value;
return ESP_OK;
}
static esp_err_t read_direction_reg(esp_io_expander_handle_t handle, uint32_t *value)
{
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)__containerof(handle, esp_io_expander_tca9554_t, base);
*value = tca9554->regs.direction;
return ESP_OK;
}
static esp_err_t reset(esp_io_expander_t *handle)
{
ESP_RETURN_ON_ERROR(write_direction_reg(handle, DIR_REG_DEFAULT_VAL), TAG, "Write dir reg failed");
ESP_RETURN_ON_ERROR(write_output_reg(handle, OUT_REG_DEFAULT_VAL), TAG, "Write output reg failed");
return ESP_OK;
}
static esp_err_t del(esp_io_expander_t *handle)
{
esp_io_expander_tca9554_t *tca9554 = (esp_io_expander_tca9554_t *)__containerof(handle, esp_io_expander_tca9554_t, base);
ESP_RETURN_ON_ERROR(i2c_master_bus_rm_device(tca9554->i2c_handle), TAG, "Remove I2C device failed");
free(tca9554);
return ESP_OK;
}

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dependencies:
esp_io_expander:
public: true
version: ^1.0.1
idf: '>=5.2'
description: ESP IO Expander - TCA9554(A)
repository: git://github.com/espressif/esp-bsp.git
repository_info:
commit_sha: d08dd309525a6f184a1b83dd9403c655b5e8339e
path: components/io_expander/esp_io_expander_tca9554
url: https://github.com/espressif/esp-bsp/tree/master/components/io_expander/esp_io_expander_tca9554
version: 2.0.0

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/*
* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief ESP IO expander: TCA9554
*/
#pragma once
#include <stdint.h>
#include "esp_err.h"
#include "driver/i2c_master.h"
#include "esp_io_expander.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create a TCA9554(A) IO expander object
*
* @param[in] i2c_bus I2C bus handle. Obtained from `i2c_new_master_bus()`
* @param[in] dev_addr I2C device address of chip. Can be `ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_XXX` or `ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_XXX`.
* @param[out] handle_ret Handle to created IO expander object
*
* @return
* - ESP_OK: Success, otherwise returns ESP_ERR_xxx
*/
esp_err_t esp_io_expander_new_i2c_tca9554(i2c_master_bus_handle_t i2c_bus, uint32_t dev_addr, esp_io_expander_handle_t *handle_ret);
/**
* @brief I2C address of the TCA9554
*
* The 8-bit address format is as follows:
*
* (Slave Address)
* ┌─────────────────┷─────────────────┐
* ┌─────┐─────┐─────┐─────┐─────┐─────┐─────┐─────┐
* | 0 | 1 | 0 | 0 | A2 | A1 | A0 | R/W |
* └─────┘─────┘─────┘─────┘─────┘─────┘─────┘─────┘
* └────────┯────────┘ └─────┯──────┘
* (Fixed) (Hareware Selectable)
*
* And the 7-bit slave address is the most important data for users.
* For example, if a chip's A0,A1,A2 are connected to GND, it's 7-bit slave address is 0100000b(0x20).
* Then users can use `ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_000` to init it.
*/
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_000 (0x20)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_001 (0x21)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_010 (0x22)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_011 (0x23)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_100 (0x24)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_101 (0x25)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_110 (0x26)
#define ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_111 (0x27)
/**
* @brief I2C address of the TCA9554A
*
* The 8-bit address format is as follows:
*
* (Slave Address)
* ┌─────────────────┷─────────────────┐
* ┌─────┐─────┐─────┐─────┐─────┐─────┐─────┐─────┐
* | 0 | 1 | 1 | 1 | A2 | A1 | A0 | R/W |
* └─────┘─────┘─────┘─────┘─────┘─────┘─────┘─────┘
* └────────┯────────┘ └─────┯──────┘
* (Fixed) (Hareware Selectable)
*
* And the 7-bit slave address is the most important data for users.
* For example, if a chip's A0,A1,A2 are connected to GND, it's 7-bit slave address is 0111000b(0x38).
* Then users can use `ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_000` to init it.
*/
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_000 (0x38)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_001 (0x39)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_010 (0x3A)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_011 (0x3B)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_100 (0x3C)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_101 (0x3D)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_110 (0x3E)
#define ESP_IO_EXPANDER_I2C_TCA9554A_ADDRESS_111 (0x3F)
#ifdef __cplusplus
}
#endif

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managed_components/espressif__esp_io_expander_tca9554/test_apps/CMakeLists.txt Normal file
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# The following lines of boilerplate have to be in your project's CMakeLists
# in this exact order for cmake to work correctly
cmake_minimum_required(VERSION 3.5)
set(COMPONENTS main)
include($ENV{IDF_PATH}/tools/cmake/project.cmake)
project(test_app_tca9554)

4
managed_components/espressif__esp_io_expander_tca9554/test_apps/main/CMakeLists.txt Normal file
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idf_component_register(
SRCS "test_app_tca9554.c"
REQUIRES unity
)

6
managed_components/espressif__esp_io_expander_tca9554/test_apps/main/idf_component.yml Normal file
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## IDF Component Manager Manifest File
dependencies:
idf: ">=5.2"
esp_io_expander_tca9554:
version: "*"
override_path: "../../../esp_io_expander_tca9554"

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managed_components/espressif__esp_io_expander_tca9554/test_apps/main/test_app_tca9554.c Normal file
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/*
* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "unity.h"
#include "unity_test_runner.h"
#include "unity_test_utils_memory.h"
#include "esp_system.h"
#include "esp_log.h"
#include "driver/i2c_master.h"
#include "esp_io_expander_tca9554.h"
// Pinout for ESP32-S3-LCD-Ev-Board
#define I2C_MASTER_SCL_IO 48 /*!< gpio number for I2C master clock */
#define I2C_MASTER_SDA_IO 47 /*!< gpio number for I2C master data */
#define I2C_MASTER_NUM I2C_NUM_0 /*!< I2C port number for master dev */
#define I2C_ADDRESS ESP_IO_EXPANDER_I2C_TCA9554_ADDRESS_000
/*!< I2C address of slave dev */
#define TEST_LOOP_CNT 10
#define TEST_LOOP_DELAY_MS 500
#define TEST_OUTPUT_PINS (IO_EXPANDER_PIN_NUM_0 | IO_EXPANDER_PIN_NUM_1)
#define TEST_INPUT_PINS (IO_EXPANDER_PIN_NUM_2 | IO_EXPANDER_PIN_NUM_3)
static const char *TAG = "tca9554 test";
static esp_io_expander_handle_t io_expander = NULL;
static i2c_master_bus_handle_t i2c_handle = NULL;
static void i2c_bus_init(void)
{
const i2c_master_bus_config_t bus_config = {
.i2c_port = I2C_MASTER_NUM,
.sda_io_num = I2C_MASTER_SDA_IO,
.scl_io_num = I2C_MASTER_SCL_IO,
.clk_source = I2C_CLK_SRC_DEFAULT,
};
esp_err_t ret = i2c_new_master_bus(&bus_config, &i2c_handle);
TEST_ASSERT_EQUAL_MESSAGE(ESP_OK, ret, "I2C install returned error");
}
static void i2c_bus_deinit(void)
{
esp_err_t ret = i2c_del_master_bus(i2c_handle);
TEST_ASSERT_EQUAL_MESSAGE(ESP_OK, ret, "I2C uninstall returned error");
}
static void i2c_dev_tca9554_init(void)
{
esp_err_t ret = esp_io_expander_new_i2c_tca9554(i2c_handle, I2C_ADDRESS, &io_expander);
TEST_ASSERT_EQUAL_MESSAGE(ESP_OK, ret, "TCA9554 create returned error");
}
static void i2c_dev_tca9554_deinit(void)
{
esp_err_t ret = esp_io_expander_del(io_expander);
TEST_ASSERT_EQUAL_MESSAGE(ESP_OK, ret, "TCA9554 delete returned error");
}
TEST_CASE("IO expander tca9554 test", "[tca9554]")
{
i2c_bus_init();
i2c_dev_tca9554_init();
esp_err_t ret;
/* Test output level function */
ret = esp_io_expander_set_dir(io_expander, TEST_OUTPUT_PINS, IO_EXPANDER_OUTPUT);
TEST_ASSERT_EQUAL(ESP_OK, ret);
// Print state
ret = esp_io_expander_print_state(io_expander);
TEST_ASSERT_EQUAL(ESP_OK, ret);
for (int i = 0; i < TEST_LOOP_CNT; i++) {
// Set level to 0
ESP_LOGI(TAG, "Set level to 0");
ret = esp_io_expander_set_level(io_expander, TEST_OUTPUT_PINS, 0);
TEST_ASSERT_EQUAL(ESP_OK, ret);
vTaskDelay(pdMS_TO_TICKS(TEST_LOOP_DELAY_MS / 2));
// Set level to 1
ESP_LOGI(TAG, "Set level to 1");
ret = esp_io_expander_set_level(io_expander, TEST_OUTPUT_PINS, 1);
TEST_ASSERT_EQUAL(ESP_OK, ret);
vTaskDelay(pdMS_TO_TICKS(TEST_LOOP_DELAY_MS / 2));
}
/* Test output level function */
uint32_t input_level_mask = 0;
ret = esp_io_expander_set_dir(io_expander, TEST_INPUT_PINS, IO_EXPANDER_INPUT);
TEST_ASSERT_EQUAL(ESP_OK, ret);
// Print state
ret = esp_io_expander_print_state(io_expander);
TEST_ASSERT_EQUAL(ESP_OK, ret);
for (int i = 0; i < TEST_LOOP_CNT; i++) {
// Get input level
ret = esp_io_expander_get_level(io_expander, TEST_INPUT_PINS, &input_level_mask);
TEST_ASSERT_EQUAL(ESP_OK, ret);
ESP_LOGI(TAG, "Input level mask: 0x%02" PRIX32, input_level_mask);
vTaskDelay(pdMS_TO_TICKS(TEST_LOOP_DELAY_MS));
}
i2c_dev_tca9554_deinit();
i2c_bus_deinit();
vTaskDelay(10); // Give FreeRTOS some time to free its resources
}
#define TEST_MEMORY_LEAK_THRESHOLD (500)
void setUp(void)
{
unity_utils_set_leak_level(TEST_MEMORY_LEAK_THRESHOLD);
unity_utils_record_free_mem();
}
void tearDown(void)
{
unity_utils_evaluate_leaks();
}
void app_main(void)
{
/**
* ________ ______ ______ ______ _______ _______ __ __ ___ ______ ___
* | \ / \ / \ / \ | \ | \| \ | \ / \ / \ | \
* \$$$$$$$$| $$$$$$\| $$$$$$\| $$$$$$\| $$$$$$$ | $$$$$$$| $$ | $$ / $$$| $$$$$$\ \$$$\
* | $$ | $$ \$$| $$__| $$| $$__/ $$| $$____ | $$____ | $$__| $$| $$ | $$__| $$ \$$\
* | $$ | $$ | $$ $$ \$$ $$| $$ \ | $$ \| $$ $$| $$ | $$ $$ | $$
* | $$ | $$ __ | $$$$$$$$ _\$$$$$$$ \$$$$$$$\ \$$$$$$$\\$$$$$$$$| $$ | $$$$$$$$ | $$
* | $$ | $$__/ \| $$ | $$| \__/ $$| \__| $$| \__| $$ | $$ \$$\_ | $$ | $$ _/ $$
* | $$ \$$ $$| $$ | $$ \$$ $$ \$$ $$ \$$ $$ | $$ \$$ \| $$ | $$| $$
* \$$ \$$$$$$ \$$ \$$ \$$$$$$ \$$$$$$ \$$$$$$ \$$ \$$$ \$$ \$$ \$$$
*
*/
printf(" ________ ______ ______ ______ _______ _______ __ __ ___ ______ ___\r\n");
printf("| \\ / \\ / \\ / \\ | \\ | \\| \\ | \\ / \\ / \\ | \\\r\n");
printf(" \\$$$$$$$$| $$$$$$\\| $$$$$$\\| $$$$$$\\| $$$$$$$ | $$$$$$$| $$ | $$ / $$$| $$$$$$\\ \\$$$\\\r\n");
printf(" | $$ | $$ \\$$| $$__| $$| $$__/ $$| $$____ | $$____ | $$__| $$| $$ | $$__| $$ \\$$\\\r\n");
printf(" | $$ | $$ | $$ $$ \\$$ $$| $$ \\ | $$ \\| $$ $$| $$ | $$ $$ | $$\r\n");
printf(" | $$ | $$ __ | $$$$$$$$ _\\$$$$$$$ \\$$$$$$$\\ \\$$$$$$$\\\\$$$$$$$$| $$ | $$$$$$$$ | $$\r\n");
printf(" | $$ | $$__/ \\| $$ | $$| \\__/ $$| \\__| $$| \\__| $$ | $$ \\$$\\_ | $$ | $$ _/ $$\r\n");
printf(" | $$ \\$$ $$| $$ | $$ \\$$ $$ \\$$ $$ \\$$ $$ | $$ \\$$ \\| $$ | $$| $$\r\n");
printf(" \\$$ \\$$$$$$ \\$$ \\$$ \\$$$$$$ \\$$$$$$ \\$$$$$$ \\$$ \\$$$ \\$$ \\$$ \\$$$\r\n");
unity_run_menu();
}

4
managed_components/espressif__esp_io_expander_tca9554/test_apps/sdkconfig.defaults Normal file
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CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y
CONFIG_ESP_TASK_WDT_EN=n
CONFIG_FREERTOS_HZ=1000
CONFIG_FREERTOS_TIMER_TASK_STACK_DEPTH=4096