103 lines
2.9 KiB
Markdown
103 lines
2.9 KiB
Markdown
# ESP32 ESP-IDF component for liquid crystal display module 1602(4)A via I2C connection (PCF8574(A))
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## Tested on
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1. [ESP32 ESP-IDF v5.5.1](https://docs.espressif.com/projects/esp-idf/en/v5.5.1/esp32/index.html)
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## SAST Tools
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[PVS-Studio](https://pvs-studio.com/pvs-studio/?utm_source=website&utm_medium=github&utm_campaign=open_source) - static analyzer for C, C++, C#, and Java code.
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## Features
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1. Support of 16 LCD 160X on one bus.
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## Connection
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| 1602(4)A | PCF8574 |
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| -------- | ------- |
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| RS | P0 |
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| E | P2 |
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| D4 | P4 |
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| D5 | P5 |
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| D6 | P6 |
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| D7 | P7 |
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## Dependencies
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1. [zh_vector](http://git.zh.com.ru/alexey.zholtikov/zh_vector)
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2. [zh_pcf8574](http://git.zh.com.ru/alexey.zholtikov/zh_pcf8574)
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## Using
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In an existing project, run the following command to install the components:
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```text
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cd ../your_project/components
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git clone http://git.zh.com.ru/alexey.zholtikov/zh_160x_i2c
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git clone http://git.zh.com.ru/alexey.zholtikov/zh_pcf8574
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git clone http://git.zh.com.ru/alexey.zholtikov/zh_vector
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```
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In the application, add the component:
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```c
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#include "zh_160x_i2c.h"
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```
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## Examples
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One LCD on bus:
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```c
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#include "zh_160x_i2c.h"
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#define I2C_PORT (I2C_NUM_MAX - 1)
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i2c_master_bus_handle_t i2c_bus_handle = NULL;
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zh_pcf8574_handle_t lcd_160x_handle = {0};
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void app_main(void)
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{
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esp_log_level_set("zh_160x_i2c", ESP_LOG_ERROR);
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esp_log_level_set("zh_pcf8574", ESP_LOG_ERROR);
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esp_log_level_set("zh_vector", ESP_LOG_ERROR);
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i2c_master_bus_config_t i2c_bus_config = {
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.clk_source = I2C_CLK_SRC_DEFAULT,
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.i2c_port = I2C_PORT,
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.scl_io_num = GPIO_NUM_22,
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.sda_io_num = GPIO_NUM_21,
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.glitch_ignore_cnt = 7,
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.flags.enable_internal_pullup = true,
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};
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i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
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zh_pcf8574_init_config_t config = ZH_PCF8574_INIT_CONFIG_DEFAULT();
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config.i2c_handle = i2c_bus_handle;
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config.i2c_address = 0x27;
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zh_pcf8574_init(&config, &lcd_160x_handle);
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zh_160x_init(&lcd_160x_handle, ZH_LCD_16X2);
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for (;;)
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{
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zh_160x_set_cursor(&lcd_160x_handle, 0, 0);
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zh_160x_print_char(&lcd_160x_handle, "LCD 160X");
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zh_160x_set_cursor(&lcd_160x_handle, 1, 0);
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zh_160x_print_char(&lcd_160x_handle, "Hello World!");
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vTaskDelay(5000 / portTICK_PERIOD_MS);
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zh_160x_set_cursor(&lcd_160x_handle, 0, 0);
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zh_160x_print_char(&lcd_160x_handle, "Progress: ");
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for (uint8_t i = 0; i <= 100; ++i)
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{
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zh_160x_set_cursor(&lcd_160x_handle, 0, 10);
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zh_160x_print_int(&lcd_160x_handle, i);
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zh_160x_print_char(&lcd_160x_handle, "%");
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zh_160x_print_progress_bar(&lcd_160x_handle, 1, i);
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vTaskDelay(100 / portTICK_PERIOD_MS);
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}
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vTaskDelay(5000 / portTICK_PERIOD_MS);
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zh_160x_lcd_clear(&lcd_160x_handle);
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vTaskDelay(5000 / portTICK_PERIOD_MS);
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}
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}
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```
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