Valerii Koval
84 lines
2.5 KiB
C
84 lines
2.5 KiB
C
/*
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* SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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*/
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#include <stdint.h>
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#include "esp_log.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "tinyusb.h"
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#include "tusb_cdc_acm.h"
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#include "sdkconfig.h"
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static const char *TAG = "example";
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static uint8_t buf[CONFIG_TINYUSB_CDC_RX_BUFSIZE + 1];
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void tinyusb_cdc_rx_callback(int itf, cdcacm_event_t *event)
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{
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/* initialization */
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size_t rx_size = 0;
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/* read */
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esp_err_t ret = tinyusb_cdcacm_read(itf, buf, CONFIG_TINYUSB_CDC_RX_BUFSIZE, &rx_size);
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if (ret == ESP_OK) {
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ESP_LOGI(TAG, "Data from channel %d:", itf);
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ESP_LOG_BUFFER_HEXDUMP(TAG, buf, rx_size, ESP_LOG_INFO);
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} else {
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ESP_LOGE(TAG, "Read error");
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}
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/* write back */
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tinyusb_cdcacm_write_queue(itf, buf, rx_size);
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tinyusb_cdcacm_write_flush(itf, 0);
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}
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void tinyusb_cdc_line_state_changed_callback(int itf, cdcacm_event_t *event)
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{
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int dtr = event->line_state_changed_data.dtr;
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int rts = event->line_state_changed_data.rts;
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ESP_LOGI(TAG, "Line state changed on channel %d: DTR:%d, RTS:%d", itf, dtr, rts);
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}
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void app_main(void)
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{
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ESP_LOGI(TAG, "USB initialization");
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const tinyusb_config_t tusb_cfg = {
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.device_descriptor = NULL,
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.string_descriptor = NULL,
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.external_phy = false,
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.configuration_descriptor = NULL,
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};
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ESP_ERROR_CHECK(tinyusb_driver_install(&tusb_cfg));
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tinyusb_config_cdcacm_t acm_cfg = {
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.usb_dev = TINYUSB_USBDEV_0,
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.cdc_port = TINYUSB_CDC_ACM_0,
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.rx_unread_buf_sz = 64,
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.callback_rx = &tinyusb_cdc_rx_callback, // the first way to register a callback
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.callback_rx_wanted_char = NULL,
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.callback_line_state_changed = NULL,
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.callback_line_coding_changed = NULL
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};
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ESP_ERROR_CHECK(tusb_cdc_acm_init(&acm_cfg));
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/* the second way to register a callback */
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ESP_ERROR_CHECK(tinyusb_cdcacm_register_callback(
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TINYUSB_CDC_ACM_0,
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CDC_EVENT_LINE_STATE_CHANGED,
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&tinyusb_cdc_line_state_changed_callback));
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#if (CONFIG_TINYUSB_CDC_COUNT > 1)
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acm_cfg.cdc_port = TINYUSB_CDC_ACM_1;
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ESP_ERROR_CHECK(tusb_cdc_acm_init(&acm_cfg));
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ESP_ERROR_CHECK(tinyusb_cdcacm_register_callback(
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TINYUSB_CDC_ACM_1,
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CDC_EVENT_LINE_STATE_CHANGED,
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&tinyusb_cdc_line_state_changed_callback));
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#endif
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ESP_LOGI(TAG, "USB initialization DONE");
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}
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