81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
#include <stdio.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/task.h>
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#include <freertos/queue.h>
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#include <tca95x5.h>
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#include <driver/gpio.h>
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#include <esp_log.h>
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static i2c_dev_t tca9555 = { 0 };
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static QueueHandle_t gpio_queue = NULL;
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static const char *TAG = "tca95x5-example";
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// Interrupt handler
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static void IRAM_ATTR intr_handler(void *arg)
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{
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gpio_num_t gpio = (gpio_num_t)arg;
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xQueueSendFromISR(gpio_queue, &gpio, NULL);
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}
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// Interrupt event receiver
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static void gpio_recv_task(void *arg)
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{
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gpio_num_t gpio;
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while (1)
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{
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if (xQueueReceive(gpio_queue, &gpio, portMAX_DELAY))
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{
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ESP_LOGI(TAG, "GPIO interrupt on pin %d", gpio);
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if (gpio != CONFIG_EXAMPLE_INT_GPIO) continue;
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uint16_t val;
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esp_err_t res = tca95x5_port_read(&tca9555, &val);
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if (res != ESP_OK)
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{
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ESP_LOGE(TAG, "Error reading TCA9555: %d (%s)", res, esp_err_to_name(res));
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continue;
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}
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ESP_LOGI(TAG, "TCA9555 port value: 0x%04x", val);
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}
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}
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}
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void main_task(void *pvParameters)
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{
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// Init descriptor
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ESP_ERROR_CHECK(tca95x5_init_desc(&tca9555, CONFIG_EXAMPLE_I2C_ADDR, 0, CONFIG_EXAMPLE_I2C_MASTER_SDA, CONFIG_EXAMPLE_I2C_MASTER_SCL));
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// Setup P00, P01 and P02 as input, others as output
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ESP_ERROR_CHECK(tca95x5_port_set_mode(&tca9555, 0x0007)); // 0b0000000000000111
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// Create queue
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gpio_queue = xQueueCreate(5, sizeof(gpio_num_t));
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// Run event receiver
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xTaskCreate(gpio_recv_task, "gpio_recv_task", 4096, NULL, 5, NULL);
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// Setup GPIO interrupt
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gpio_set_direction(CONFIG_EXAMPLE_INT_GPIO, GPIO_MODE_INPUT);
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gpio_set_intr_type(CONFIG_EXAMPLE_INT_GPIO, GPIO_INTR_NEGEDGE);
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gpio_install_isr_service(0);
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gpio_isr_handler_add(CONFIG_EXAMPLE_INT_GPIO, intr_handler, (void *)CONFIG_EXAMPLE_INT_GPIO);
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// blink on P10
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bool on = true;
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while (1)
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{
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ESP_ERROR_CHECK(tca95x5_set_level(&tca9555, 8, on));
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on = !on;
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vTaskDelay(pdMS_TO_TICKS(500));
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}
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}
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void app_main()
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{
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ESP_ERROR_CHECK(i2cdev_init());
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xTaskCreate(main_task, "main_task", configMINIMAL_STACK_SIZE * 6, NULL, 5, NULL);
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}
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