wip:

.gitignore

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+.pio
+.vscode

.gitmodules

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+[submodule "lib/zh_avr_free_rtos"]
+	path = lib/zh_avr_free_rtos
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_free_rtos
+[submodule "lib/zh_avr_vector"]
+	path = lib/zh_avr_vector
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_vector
+[submodule "lib/zh_avr_i2c"]
+	path = lib/zh_avr_i2c
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_i2c
+[submodule "lib/zh_avr_common"]
+	path = lib/zh_avr_common
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_common
+[submodule "lib/zh_avr_pcf8574"]
+	path = lib/zh_avr_pcf8574
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_pcf8574
+[submodule "lib/zh_avr_160x_i2c"]
+	path = lib/zh_avr_160x_i2c
+	url = http://git.zh.com.ru/avr_libraries/zh_avr_160x_i2c

platformio.ini

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+[env:ATmega328P]
+platform = atmelavr
+board = ATmega328P
+framework = arduino

src/main.c

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+#include "FreeRTOS.h"
+#include "task.h"
+#include "avr/io.h"
+#include "zh_avr_160x_i2c.h"
+
+// #define DEBUG
+
+#define BUTTON_I2C_ADDRESS 0x00
+#define LED1_I2C_ADDRESS 0x00
+#define LED2_I2C_ADDRESS 0x00
+#define RELAY_I2C_ADDRESS 0x00
+#define LCD_I2C_ADDRESS 0x00
+
+#ifdef DEBUG
+#define BAUD_RATE 9600
+#define BAUD_PRESCALE (F_CPU / 16 / BAUD_RATE - 1)
+
+int usart(char byte, FILE *stream)
+{
+    while ((UCSR0A & (1 << UDRE0)) == 0)
+    {
+    }
+    UDR0 = byte;
+    return 0;
+}
+FILE uart = FDEV_SETUP_STREAM(usart, NULL, _FDEV_SETUP_WRITE);
+#endif
+
+zh_avr_pcf8574_handle_t button_handle = {0};
+zh_avr_pcf8574_handle_t led1_handle = {0};
+zh_avr_pcf8574_handle_t led2_handle = {0};
+zh_avr_pcf8574_handle_t relay_handle = {0};
+zh_avr_pcf8574_handle_t lcd_handle = {0};
+
+// void led_flash_task(void *pvParameters)
+// {
+//     DDRB |= (1 << PORTB5);
+//     for (;;)
+//     {
+//         PORTB ^= (1 << PORTB5);
+//         vTaskDelay(1000 / portTICK_PERIOD_MS);
+//     }
+//     vTaskDelete(NULL);
+// }
+
+int main(void)
+{
+#ifdef DEBUG
+    UBRR0H = (BAUD_PRESCALE >> 8);
+    UBRR0L = BAUD_PRESCALE;
+    UCSR0B = (1 << RXEN0) | (1 << TXEN0);
+    UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);
+    stdout = &uart;
+#endif
+    zh_avr_i2c_master_init(false);
+    zh_avr_pcf8574_init_config_t pcf8574_init_config = ZH_AVR_PCF8574_INIT_CONFIG_DEFAULT();
+    pcf8574_init_config.i2c_address = LED1_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &led1_handle);
+    zh_avr_pcf8574_write(&led1_handle, 0xFF);
+    pcf8574_init_config.i2c_address = LED2_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &led2_handle);
+    zh_avr_pcf8574_write(&led2_handle, 0x0F);
+    pcf8574_init_config.i2c_address = RELAY_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &relay_handle);
+    pcf8574_init_config.i2c_address = LCD_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &lcd_handle);
+    pcf8574_init_config.p0_gpio_work_mode = true;
+    pcf8574_init_config.p1_gpio_work_mode = true;
+    pcf8574_init_config.p2_gpio_work_mode = true;
+    pcf8574_init_config.p3_gpio_work_mode = true;
+    pcf8574_init_config.p4_gpio_work_mode = true;
+    pcf8574_init_config.p5_gpio_work_mode = true;
+    pcf8574_init_config.interrupt_port = AVR_PORTD;
+    pcf8574_init_config.interrupt_gpio = PORTD2;
+    pcf8574_init_config.i2c_address = BUTTON_I2C_ADDRESS;
+    zh_avr_pcf8574_init(&pcf8574_init_config, &button_handle);
+    zh_avr_160x_init(&lcd_handle, ZH_LCD_16X4);
+    zh_avr_160x_set_cursor(&lcd_handle, 0, 0);
+    zh_avr_160x_print_char(&lcd_handle, "LLC AEROTECH");
+    zh_avr_160x_set_cursor(&lcd_handle, 1, 0);
+    zh_avr_160x_print_char(&lcd_handle, "ATE0003.000.000");
+    zh_avr_160x_set_cursor(&lcd_handle, 2, 0);
+    zh_avr_160x_print_char(&lcd_handle, "Firmware v1.0.0");
+    zh_avr_160x_set_cursor(&lcd_handle, 3, 0);
+    zh_avr_160x_print_char(&lcd_handle, "Loading: ");
+    for (uint8_t i = 0; i <= 100; ++i)
+    {
+        zh_avr_160x_set_cursor(&lcd_handle, 3, 10); // For LCD 16X4.
+        zh_avr_160x_print_int(&lcd_handle, i);
+        zh_avr_160x_print_char(&lcd_handle, "%");
+        _delay_ms(50);
+    }
+    // xTaskCreate(led_flash_task, "led flash task", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL);
+    vTaskStartScheduler();
+    return 0;
+}
+
+void zh_avr_pcf8574_event_handler(zh_avr_pcf8574_event_on_isr_t *event)
+{
+    printf("Interrupt happened on device address 0x%02X on GPIO number %d at level %d.\n", event->i2c_address, event->gpio_number, event->gpio_level);
+    printf("Interrupt Task Remaining Stack Size %d.\n", uxTaskGetStackHighWaterMark(NULL));
+}
+
+ISR(PCINT2_vect)
+{
+    if (zh_avr_pcf8574_isr_handler() == pdTRUE)
+    {
+        portYIELD();
+    }
+}