From a0e7add434de36bbe329ae8a4aae81b2ee0ffa0a Mon Sep 17 00:00:00 2001 From: Alexey Zholtikov Date: Wed, 24 Dec 2025 18:10:40 +0300 Subject: [PATCH] doc: updated example --- README.md | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/README.md b/README.md index cc637f8..2df7752 100644 --- a/README.md +++ b/README.md @@ -60,7 +60,7 @@ One expander on bus. All GPIO's as output (except P0 - input). Interrupt is enab i2c_master_bus_handle_t i2c_bus_handle = NULL; zh_pcf8574_handle_t pcf8574_handle = {0}; -void zh_pcf8574_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data); // Required only if used input GPIO interrupts. +void zh_pcf8574_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data); void print_gpio_status(const char *message, uint8_t reg) { @@ -86,23 +86,23 @@ void app_main(void) .flags.enable_internal_pullup = true, }; i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle); - esp_event_loop_create_default(); // Required only if used input GPIO interrupts. - esp_event_handler_instance_register(ZH_PCF8574, ESP_EVENT_ANY_ID, &zh_pcf8574_event_handler, NULL, NULL); // Required only if used input GPIO interrupts. - zh_pcf8574_init_config_t config = ZH_PCF8574_INIT_CONFIG_DEFAULT(); - config.i2c_handle = i2c_bus_handle; - config.i2c_address = 0x38; - config.p0_gpio_work_mode = true; // Required only for input GPIO. - config.interrupt_gpio = GPIO_NUM_14; // Required only if used input GPIO interrupts. - zh_pcf8574_init(&config, &pcf8574_handle); + esp_event_loop_create_default(); + esp_event_handler_instance_register(ZH_PCF8574, ESP_EVENT_ANY_ID, &zh_pcf8574_event_handler, NULL, NULL); + zh_pcf8574_init_config_t pcf8574_init_config = ZH_PCF8574_INIT_CONFIG_DEFAULT(); + pcf8574_init_config.i2c_handle = i2c_bus_handle; + pcf8574_init_config.i2c_address = 0x38; + pcf8574_init_config.p0_gpio_work_mode = true; + pcf8574_init_config.interrupt_gpio = GPIO_NUM_14; + zh_pcf8574_init(&pcf8574_init_config, &pcf8574_handle); uint8_t reg = 0; zh_pcf8574_read(&pcf8574_handle, ®); print_gpio_status("GPIO status: ", reg); printf("Set P7 to 1, P1 to 1 and P0 to 0.\n"); - zh_pcf8574_write(&pcf8574_handle, 0b10000010); // GPIO P0 will not be changed because it is operating in input mode. + zh_pcf8574_write(&pcf8574_handle, 0b10000010); zh_pcf8574_read(&pcf8574_handle, ®); print_gpio_status("GPIO status: ", reg); printf("Sets P0 to 0.\n"); - zh_pcf8574_write_gpio(&pcf8574_handle, 0, false); // GPIO P0 will not be changed because it is operating in input mode. + zh_pcf8574_write_gpio(&pcf8574_handle, 0, false); bool gpio = 0; zh_pcf8574_read_gpio(&pcf8574_handle, 0, &gpio); printf("P0 status: %d.\n", gpio); @@ -128,7 +128,7 @@ void app_main(void) } } -void zh_pcf8574_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data) // Required only if used input GPIO interrupts. +void zh_pcf8574_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, void *event_data) { zh_pcf8574_event_on_isr_t *event = event_data; 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);