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feat: initial

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This commit is contained in:
Alexey Zholtikov 2025-05-18 16:08:12 +03:00
parent d558bf1933
commit afb21e6a94
9 changed files with 469 additions and 8 deletions
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.gitignore vendored
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.DS_Store
.vscode
build
sdkconfig
sdkconfig.old

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CMakeLists.txt
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idf_component_register(SRCS "main.c" INCLUDE_DIRS "include")
idf_component_register(SRCS "zh_1602a.c" INCLUDE_DIRS "include" REQUIRES driver)

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README.md
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# esp_component_template
# ESP32 ESP-IDF and ESP8266 RTOS SDK component for liquid crystal display module 1602A
esp_component_template
## Tested on
1. ESP8266 RTOS_SDK v3.4
2. ESP32 ESP-IDF v5.4
## Note
1. Automatic selection of 8 bit or 4 bit work mode.
2. Display off and cursor display are not supported.
## Using
In an existing project, run the following command to install the component:
```text
cd ../your_project/components
git clone http://git.zh.com.ru/alexey.zholtikov/zh_1602a
```
In the application, add the component:
```c
#include "zh_1602a.h"
```
## Example
8 bit or 4 bit work mode:
```c
#include "zh_1602a.h"
void app_main(void)
{
esp_log_level_set("zh_1602a", ESP_LOG_NONE); // For ESP8266 first enable "Component config -> Log output -> Enable log set level" via menuconfig.
zh_1602a_init_config_t init_config = {
.rs_gpio_number = GPIO_NUM_4,
.e_gpio_number = GPIO_NUM_2,
// .d0_gpio_number = GPIO_NUM_21, // Required for 8 bit work mode only.
// .d1_gpio_number = GPIO_NUM_13, // Required for 8 bit work mode only.
// .d2_gpio_number = GPIO_NUM_14, // Required for 8 bit work mode only.
// .d3_gpio_number = GPIO_NUM_15, // Required for 8 bit work mode only.
.d4_gpio_number = GPIO_NUM_16,
.d5_gpio_number = GPIO_NUM_17,
.d6_gpio_number = GPIO_NUM_18,
.d7_gpio_number = GPIO_NUM_19,
};
zh_1602a_init(&init_config);
for (;;)
{
zh_1602a_set_cursor(0, 0);
zh_1602a_print_char("LCD 1602A");
zh_1602a_set_cursor(1, 0);
zh_1602a_print_char("Hello World!");
vTaskDelay(5000 / portTICK_PERIOD_MS);
zh_1602a_clear_row(0);
zh_1602a_print_char("Progress: ");
for (uint8_t i = 0; i <= 100; ++i)
{
zh_1602a_set_cursor(0, 10);
zh_1602a_print_int(i);
zh_1602a_print_char("%");
zh_1602a_print_progress_bar(1, i);
vTaskDelay(100 / portTICK_PERIOD_MS);
}
vTaskDelay(5000 / portTICK_PERIOD_MS);
zh_1602a_lcd_clear();
vTaskDelay(5000 / portTICK_PERIOD_MS);
}
}
```

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ds/Liquid crystal display module 1602A.pdf Normal file
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include/main.h
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include/zh_1602a.h Normal file
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#pragma once
#include "esp_log.h"
#include "esp_err.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#ifdef __cplusplus
extern "C"
{
#endif
typedef struct // Structure for initial initialization of LCD 1602A.
{
uint8_t rs_gpio_number; // GPIO connected to RS of LCD 1602A.
uint8_t e_gpio_number; // GPIO connected to E of LCD 1602A.
uint8_t d0_gpio_number; // GPIO connected to D0 of LCD 1602A. @note Required for 8 bit work mode only.
uint8_t d1_gpio_number; // GPIO connected to D1 of LCD 1602A. @note Required for 8 bit work mode only.
uint8_t d2_gpio_number; // GPIO connected to D2 of LCD 1602A. @note Required for 8 bit work mode only.
uint8_t d3_gpio_number; // GPIO connected to D3 of LCD 1602A. @note Required for 8 bit work mode only.
uint8_t d4_gpio_number; // GPIO connected to D4 of LCD 1602A.
uint8_t d5_gpio_number; // GPIO connected to D5 of LCD 1602A.
uint8_t d6_gpio_number; // GPIO connected to D6 of LCD 1602A.
uint8_t d7_gpio_number; // GPIO connected to D7 of LCD 1602A.
} zh_1602a_init_config_t;
/**
* @brief Initializes the LCD 1602A.
*
* @param[in] config Pointer to 1602A initialized configuration structure. Can point to a temporary variable.
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_init(const zh_1602a_init_config_t *config);
/**
* @brief Clears the LCD screen.
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_lcd_clear(void);
/**
* @brief Sets the cursor to a specific position on the LCD.
*
* @param[in] row The row number (0 or 1).
* @param[in] col The column number (0–15).
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_set_cursor(uint8_t row, uint8_t col);
/**
* @brief Prints a string to the LCD.
*
* @param[in] str Pointer to the string to be displayed.
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_print_char(const char *str);
/**
* @brief Prints an integer to the LCD.
*
* @param[in] num The integer to be displayed.
*
* @return ESP_OK if success or an error code otherwise..
*/
esp_err_t zh_1602a_print_int(int num);
/**
* @brief Prints a floating-point number to the LCD.
*
* @param[in] num The floating-point number to be displayed.
* @param[in] precision The number of decimal places to display.
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_print_float(float num, uint8_t precision);
/**
* @brief Displays a progress bar on a specific row of the LCD.
*
* @param[in] row The row number (0 or 1).
* @param[in] progress The progress percentage (0–100).
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_print_progress_bar(uint8_t row, uint8_t progress);
/**
* @brief Clears a specific row on the LCD.
*
* @param[in] row The row number (0 or 1).
*
* @return ESP_OK if success or an error code otherwise.
*/
esp_err_t zh_1602a_clear_row(uint8_t row);
#ifdef __cplusplus
}
#endif

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main.c
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version.txt
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1.0.0

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zh_1602a.c Normal file
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#include "zh_1602a.h"
static const char *TAG = "zh_1602a";
#define ZH_1602A_LOGI(msg, ...) ESP_LOGI(TAG, msg, ##__VA_ARGS__)
#define ZH_1602A_LOGW(msg, ...) ESP_LOGW(TAG, msg, ##__VA_ARGS__)
#define ZH_1602A_LOGE(msg, ...) ESP_LOGE(TAG, msg, ##__VA_ARGS__)
#define ZH_1602A_LOGE_ERR(msg, err, ...) ESP_LOGE(TAG, "[%s:%d:%s] " msg, __FILE__, __LINE__, esp_err_to_name(err), ##__VA_ARGS__)
#define ZH_1602A_CHECK(cond, err, msg, ...) \
if (!(cond)) \
{ \
ZH_1602A_LOGE_ERR(msg, err); \
return err; \
}
#ifdef CONFIG_IDF_TARGET_ESP8266
#define esp_delay_us(x) os_delay_us(x)
#else
#define esp_delay_us(x) esp_rom_delay_us(x)
#endif
static esp_err_t _zh_1602a_gpio_init(const zh_1602a_init_config_t *config);
static void _zh_1602a_lcd_init(void);
static bool _zh_1602a_8bit_gpio_check(uint8_t rs, uint8_t e, uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
static bool _zh_1602a_4bit_gpio_check(uint8_t rs, uint8_t e, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
static void _zh_1602a_send_command(uint8_t command);
static void _zh_1602a_send_data(uint8_t data);
static void _zh_1602a_pulse_enable(void);
static void _zh_1602a_send_8bit(uint8_t data);
static void _zh_1602a_send_4bit(uint8_t data);
static uint8_t _rs_pin = 0;
static uint8_t _e_pin = 0;
static uint8_t _gpio_matrix[8] = {0};
static bool _is_initialized = false;
static bool _is_8bit_work_mode = true;
esp_err_t zh_1602a_init(const zh_1602a_init_config_t *config)
{
ZH_1602A_LOGI("1602A initialization started.");
ZH_1602A_CHECK(config != NULL, ESP_ERR_INVALID_ARG, "1602A initialization failed. Invalid argument.");
ZH_1602A_CHECK(_is_initialized == false, ESP_ERR_INVALID_STATE, "1602A initialization failed. 1602A is already initialized.");
esp_err_t err = _zh_1602a_gpio_init(config);
ZH_1602A_CHECK(err == ESP_OK, ESP_FAIL, "1602A initialization failed. GPIO initialization failed.");
_zh_1602a_lcd_init();
_is_initialized = true;
ZH_1602A_LOGI("CD74HC4067 initialization completed successfully in %d bit mode.", (_is_8bit_work_mode == true) ? 8 : 4);
return ESP_OK;
}
esp_err_t zh_1602a_lcd_clear(void)
{
ZH_1602A_LOGI("1602A display cleaning started.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A display cleaning failed. 1602A not initialized.");
_zh_1602a_send_command(0x01);
esp_delay_us(1600);
ZH_1602A_LOGI("1602A display cleaning completed successfully.");
return ESP_OK;
}
esp_err_t zh_1602a_set_cursor(uint8_t row, uint8_t col)
{
ZH_1602A_LOGI("1602A set cursor started.");
ZH_1602A_CHECK(row < 2 && col < 16, ESP_ERR_INVALID_ARG, "1602A set cursor failed. Invalid argument.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A set cursor failed. 1602A not initialized.");
uint8_t address = (row == 0) ? col : (0x40 + col);
_zh_1602a_send_command(0x80 | address);
ZH_1602A_LOGI("1602A set cursor completed successfully.");
return ESP_OK;
}
esp_err_t zh_1602a_print_char(const char *str)
{
ZH_1602A_LOGI("1602A print char started.");
ZH_1602A_CHECK(str != NULL, ESP_ERR_INVALID_ARG, "1602A print char failed. Invalid argument.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A print char failed. 1602A not initialized.");
while (*str != 0)
{
_zh_1602a_send_data((uint8_t)*str++);
}
ZH_1602A_LOGI("1602A print char completed successfully.");
return ESP_OK;
}
esp_err_t zh_1602a_print_int(int num)
{
ZH_1602A_LOGI("1602A print int started.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A print int failed. 1602A not initialized.");
char buffer[12];
sprintf(buffer, "%d", num);
zh_1602a_print_char(buffer);
ZH_1602A_LOGI("1602A print int completed successfully.");
return ESP_OK;
}
esp_err_t zh_1602a_print_float(float num, uint8_t precision)
{
ZH_1602A_LOGI("1602A print float started.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A print float failed. 1602A not initialized.");
char buffer[16];
sprintf(buffer, "%.*f", precision, num);
zh_1602a_print_char(buffer);
ZH_1602A_LOGI("1602A print float completed successfully.");
return ESP_OK;
}
esp_err_t zh_1602a_print_progress_bar(uint8_t row, uint8_t progress)
{
ZH_1602A_LOGI("1602A print progress bar started.");
ZH_1602A_CHECK(row < 2 && progress <= 100, ESP_ERR_INVALID_ARG, "1602A print progress bar failed. Invalid argument.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A print progress bar failed. 1602A not initialized.");
uint8_t blocks = (progress * 16) / 100;
zh_1602a_set_cursor(row, 0);
for (uint8_t i = 0; i < 16; ++i)
{
if (i < blocks)
{
zh_1602a_print_char("\xFF");
}
else
{
zh_1602a_print_char(" ");
}
}
ZH_1602A_LOGI("1602A print progress bar completed successfully.");
return ESP_OK;
}
esp_err_t zh_1602a_clear_row(uint8_t row)
{
ZH_1602A_LOGI("1602A clear row started.");
ZH_1602A_CHECK(row < 2, ESP_ERR_INVALID_ARG, "1602A clear row failed. Invalid argument.");
ZH_1602A_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, "1602A clear row failed. 1602A not initialized.");
zh_1602a_set_cursor(row, 0);
for (uint8_t i = 0; i < 16; ++i)
{
zh_1602a_print_char(" ");
}
zh_1602a_set_cursor(row, 0);
ZH_1602A_LOGI("1602A clear row completed successfully.");
return ESP_OK;
}
static esp_err_t _zh_1602a_gpio_init(const zh_1602a_init_config_t *config)
{
ZH_1602A_CHECK(config->rs_gpio_number < GPIO_NUM_MAX || config->e_gpio_number < GPIO_NUM_MAX || config->d0_gpio_number < GPIO_NUM_MAX ||
config->d1_gpio_number < GPIO_NUM_MAX || config->d2_gpio_number < GPIO_NUM_MAX || config->d3_gpio_number < GPIO_NUM_MAX ||
config->d4_gpio_number < GPIO_NUM_MAX || config->d5_gpio_number < GPIO_NUM_MAX || config->d6_gpio_number < GPIO_NUM_MAX || config->d7_gpio_number < GPIO_NUM_MAX,
ESP_ERR_INVALID_ARG, "Invalid GPIO number.");
bool gpio_check = _zh_1602a_8bit_gpio_check(config->rs_gpio_number, config->e_gpio_number, config->d0_gpio_number, config->d1_gpio_number, config->d2_gpio_number,
config->d3_gpio_number, config->d4_gpio_number, config->d5_gpio_number, config->d6_gpio_number, config->d7_gpio_number);
if (gpio_check == false)
{
gpio_check = _zh_1602a_4bit_gpio_check(config->rs_gpio_number, config->e_gpio_number, config->d4_gpio_number, config->d5_gpio_number, config->d6_gpio_number, config->d7_gpio_number);
ZH_1602A_CHECK(gpio_check == true, ESP_FAIL, "Invalid GPIO number.");
_is_8bit_work_mode = false;
}
gpio_config_t pin_config = {
.mode = GPIO_MODE_OUTPUT,
.pull_down_en = GPIO_PULLDOWN_ENABLE,
.pin_bit_mask = (1ULL << config->rs_gpio_number) | (1ULL << config->e_gpio_number) | (1ULL << config->d0_gpio_number) | (1ULL << config->d1_gpio_number) |
(1ULL << config->d2_gpio_number) | (1ULL << config->d3_gpio_number) | (1ULL << config->d4_gpio_number) | (1ULL << config->d5_gpio_number) |
(1ULL << config->d6_gpio_number) | (1ULL << config->d7_gpio_number),
};
esp_err_t err = gpio_config(&pin_config);
ZH_1602A_CHECK(err == ESP_OK, err, "GPIO initialization failed.")
_rs_pin = config->rs_gpio_number;
_e_pin = config->e_gpio_number;
_gpio_matrix[0] = config->d0_gpio_number;
_gpio_matrix[1] = config->d1_gpio_number;
_gpio_matrix[2] = config->d2_gpio_number;
_gpio_matrix[3] = config->d3_gpio_number;
_gpio_matrix[4] = config->d4_gpio_number;
_gpio_matrix[5] = config->d5_gpio_number;
_gpio_matrix[6] = config->d6_gpio_number;
_gpio_matrix[7] = config->d7_gpio_number;
return ESP_OK;
}
static void _zh_1602a_lcd_init(void)
{
vTaskDelay(20 / portTICK_PERIOD_MS);
_zh_1602a_send_4bit(0x03);
vTaskDelay(10 / portTICK_PERIOD_MS);
_zh_1602a_send_4bit(0x03);
vTaskDelay(10 / portTICK_PERIOD_MS);
_zh_1602a_send_4bit(0x03);
esp_delay_us(150);
if (_is_8bit_work_mode == false)
{
_zh_1602a_send_4bit(0x02);
}
_zh_1602a_send_command((_is_8bit_work_mode == true) ? 0x38 : 0x28);
vTaskDelay(10 / portTICK_PERIOD_MS);
_zh_1602a_send_command((_is_8bit_work_mode == true) ? 0x38 : 0x28);
esp_delay_us(150);
_zh_1602a_send_command((_is_8bit_work_mode == true) ? 0x38 : 0x28);
_zh_1602a_send_command(0x0C);
_zh_1602a_send_command(0x01);
_zh_1602a_send_command(0x06);
vTaskDelay(10 / portTICK_PERIOD_MS);
}
static bool _zh_1602a_8bit_gpio_check(uint8_t rs, uint8_t e, uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
uint8_t matrix[] = {rs, e, d0, d1, d2, d3, d4, d5, d6, d7};
for (uint8_t i = 0; i < sizeof(matrix); ++i)
{
for (uint8_t j = i + 1; j < sizeof(matrix); ++j)
{
if (matrix[i] == matrix[j])
{
return false;
}
}
}
return true;
}
static bool _zh_1602a_4bit_gpio_check(uint8_t rs, uint8_t e, uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
uint8_t matrix[] = {rs, e, d4, d5, d6, d7};
for (uint8_t i = 0; i < sizeof(matrix); ++i)
{
for (uint8_t j = i + 1; j < sizeof(matrix); ++j)
{
if (matrix[i] == matrix[j])
{
return false;
}
}
}
return true;
}
static void _zh_1602a_send_command(uint8_t command)
{
gpio_set_level(_rs_pin, 0);
gpio_set_level(_e_pin, 0);
if (_is_8bit_work_mode == true)
{
_zh_1602a_send_8bit(command);
}
else
{
_zh_1602a_send_4bit(command >> 4);
_zh_1602a_send_4bit(command);
}
}
static void _zh_1602a_send_data(uint8_t data)
{
gpio_set_level(_rs_pin, 1);
gpio_set_level(_e_pin, 0);
if (_is_8bit_work_mode == true)
{
_zh_1602a_send_8bit(data);
}
else
{
_zh_1602a_send_4bit(data >> 4);
_zh_1602a_send_4bit(data);
}
}
static void _zh_1602a_pulse_enable(void)
{
gpio_set_level(_e_pin, 1);
esp_delay_us(1);
gpio_set_level(_e_pin, 0);
esp_delay_us(40);
}
static void _zh_1602a_send_8bit(uint8_t data)
{
for (uint8_t i = 0; i <= 7; ++i)
{
gpio_set_level(_gpio_matrix[i], (data >> i) & 0x01);
}
_zh_1602a_pulse_enable();
}
static void _zh_1602a_send_4bit(uint8_t data)
{
for (uint8_t i = 0; i <= 3; ++i)
{
gpio_set_level(_gpio_matrix[i + 4], (data >> i) & 0x01);
}
_zh_1602a_pulse_enable();
}