68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
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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 = "usb-cdc";
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static uint8_t buf[CONFIG_USB_CDC_RX_BUFSIZE + 1];
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void usb_cdc_rx_callback(int itf, cdcacm_event_t* event) {
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size_t rx_size = 0;
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esp_err_t ret = tinyusb_cdcacm_read(itf, buf, CONFIG_USB_CDC_RX_BUFSIZE, &rx_size);
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if(ret == ESP_OK) {
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buf[rx_size] = '\0';
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ESP_LOGI(TAG, "Got data (%d bytes): %s", rx_size, buf);
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} else {
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ESP_LOGE(TAG, "Read error");
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}
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// echo
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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 usb_cdc_line_state_changed_callback(int itf, cdcacm_event_t* event) {
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int dtr = event->line_state_changed_data.dtr;
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int rst = event->line_state_changed_data.rts;
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ESP_LOGI(TAG, "Line state changed! dtr:%d, rst:%d", dtr, rst);
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}
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void usb_cdc_line_coding_changed_callback(int itf, cdcacm_event_t* event) {
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uint32_t bit_rate = event->line_coding_changed_data.p_line_coding->bit_rate;
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uint8_t stop_bits = event->line_coding_changed_data.p_line_coding->stop_bits;
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uint8_t parity = event->line_coding_changed_data.p_line_coding->parity;
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uint8_t data_bits = event->line_coding_changed_data.p_line_coding->data_bits;
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ESP_LOGI(
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TAG,
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"Line coding changed! bit_rate:%d, stop_bits:%d, parity:%d, data_bits:%d",
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bit_rate,
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stop_bits,
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parity,
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data_bits);
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}
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void usb_cdc_init(void) {
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ESP_LOGI(TAG, "USB initialization");
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tinyusb_config_t tusb_cfg = {};
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ESP_ERROR_CHECK(tinyusb_driver_install(&tusb_cfg));
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tinyusb_config_cdcacm_t amc_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 = &usb_cdc_rx_callback,
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.callback_rx_wanted_char = NULL,
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.callback_line_state_changed = &usb_cdc_line_state_changed_callback,
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.callback_line_coding_changed = &usb_cdc_line_coding_changed_callback};
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ESP_ERROR_CHECK(tusb_cdc_acm_init(&amc_cfg));
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ESP_LOGI(TAG, "USB initialization DONE");
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}
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