@@ -25,8 +25,7 @@ ESP_EVENT_DEFINE_BASE(ARDUINO_USB_CDC_EVENTS);
2525esp_err_t arduino_usb_event_post (esp_event_base_t event_base, int32_t event_id, void *event_data, size_t event_data_size, TickType_t ticks_to_wait);
2626esp_err_t arduino_usb_event_handler_register_with (esp_event_base_t event_base, int32_t event_id, esp_event_handler_t event_handler, void *event_handler_arg);
2727
28- #define MAX_USB_CDC_DEVICES 2
29- USBCDC *devices[MAX_USB_CDC_DEVICES] = {NULL , NULL };
28+ USBCDC *devices[CFG_TUD_CDC];
3029
3130static uint16_t load_cdc_descriptor (uint8_t *dst, uint8_t *itf) {
3231 uint8_t str_index = tinyusb_add_string_descriptor (" TinyUSB CDC" );
@@ -38,23 +37,43 @@ static uint16_t load_cdc_descriptor(uint8_t *dst, uint8_t *itf) {
3837 return TUD_CDC_DESC_LEN;
3938}
4039
40+ static uint16_t load_cdc_descriptor2 (uint8_t *dst, uint8_t *itf) {
41+ uint8_t str_index = tinyusb_add_string_descriptor (" TinyUSB CDC2" );
42+ uint8_t ep_ntfy = tinyusb_get_free_in_endpoint ();
43+ TU_VERIFY (ep_ntfy != 0 );
44+ uint8_t ep_in = tinyusb_get_free_in_endpoint ();
45+ TU_VERIFY (ep_in != 0 );
46+ uint8_t ep_out = tinyusb_get_free_out_endpoint ();
47+ TU_VERIFY (ep_out != 0 );
48+ uint8_t descriptor[TUD_CDC_DESC_LEN] = {
49+ // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
50+ TUD_CDC_DESCRIPTOR (*itf, str_index, (uint8_t )(0x80 | ep_ntfy), CFG_TUD_ENDOINT_SIZE, ep_out, (uint8_t )(0x80 | ep_in), CFG_TUD_ENDOINT_SIZE)
51+ };
52+ *itf += 2 ;
53+ memcpy (dst, descriptor, TUD_CDC_DESC_LEN);
54+ return TUD_CDC_DESC_LEN;
55+ }
56+
4157// Invoked when line state DTR & RTS are changed via SET_CONTROL_LINE_STATE
4258void tud_cdc_line_state_cb (uint8_t itf, bool dtr, bool rts) {
43- if (itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL ) {
59+ // log_v("ITF: %u, DTR: %u, RTS: %u", itf, dtr, rts);
60+ if (itf < CFG_TUD_CDC && devices[itf] != NULL ) {
4461 devices[itf]->_onLineState (dtr, rts);
4562 }
4663}
4764
4865// Invoked when line coding is change via SET_LINE_CODING
4966void tud_cdc_line_coding_cb (uint8_t itf, cdc_line_coding_t const *p_line_coding) {
50- if (itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL ) {
67+ // log_v("ITF: %u, BITRATE: %lu, STOP_BITS: %u, PARITY: %u, DATA_BITS: %u", itf, p_line_coding->bit_rate, p_line_coding->stop_bits, p_line_coding->parity, p_line_coding->data_bits);
68+ if (itf < CFG_TUD_CDC && devices[itf] != NULL ) {
5169 devices[itf]->_onLineCoding (p_line_coding->bit_rate , p_line_coding->stop_bits , p_line_coding->parity , p_line_coding->data_bits );
5270 }
5371}
5472
5573// Invoked when received new data
5674void tud_cdc_rx_cb (uint8_t itf) {
57- if (itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL ) {
75+ // log_v("ITF: %u", itf);
76+ if (itf < CFG_TUD_CDC && devices[itf] != NULL ) {
5877 devices[itf]->_onRX ();
5978 }
6079}
@@ -66,13 +85,13 @@ void tud_cdc_send_break_cb(uint8_t itf, uint16_t duration_ms) {
6685
6786// Invoked when space becomes available in TX buffer
6887void tud_cdc_tx_complete_cb (uint8_t itf) {
69- if (itf < MAX_USB_CDC_DEVICES && devices[itf] != NULL ) {
88+ if (itf < CFG_TUD_CDC && devices[itf] != NULL ) {
7089 devices[itf]->_onTX ();
7190 }
7291}
7392
7493static void ARDUINO_ISR_ATTR cdc0_write_char (char c) {
75- if (devices[0 ] != NULL ) {
94+ if (CFG_TUD_CDC && devices[0 ] != NULL ) {
7695 tud_cdc_n_write_char (0 , c);
7796 }
7897}
@@ -84,9 +103,15 @@ static void usb_unplugged_cb(void *arg, esp_event_base_t event_base, int32_t eve
84103USBCDC::USBCDC (uint8_t itfn)
85104 : itf(itfn), bit_rate(0 ), stop_bits(0 ), parity(0 ), data_bits(0 ), dtr(false ), rts(false ), connected(false ), reboot_enable(true ), rx_queue(NULL ), tx_lock(NULL ),
86105 tx_timeout_ms(250 ) {
87- tinyusb_enable_interface (USB_INTERFACE_CDC, TUD_CDC_DESC_LEN, load_cdc_descriptor);
88- if (itf < MAX_USB_CDC_DEVICES) {
106+ if (itf < CFG_TUD_CDC) {
107+ if (itf == 0 ) {
108+ tinyusb_enable_interface (USB_INTERFACE_CDC, TUD_CDC_DESC_LEN, load_cdc_descriptor);
109+ } else {
110+ tinyusb_enable_interface (USB_INTERFACE_CDC2, TUD_CDC_DESC_LEN, load_cdc_descriptor2);
111+ }
89112 arduino_usb_event_handler_register_with (ARDUINO_USB_EVENTS, ARDUINO_USB_STOPPED_EVENT, usb_unplugged_cb, this );
113+ } else {
114+ log_e (" Maximum of %u CDC devices are supported" , CFG_TUD_CDC);
90115 }
91116}
92117
@@ -142,6 +167,9 @@ size_t USBCDC::setRxBufferSize(size_t rx_queue_len) {
142167}
143168
144169void USBCDC::begin (unsigned long baud) {
170+ if (itf >= CFG_TUD_CDC) {
171+ return ;
172+ }
145173 if (tx_lock == NULL ) {
146174 tx_lock = xSemaphoreCreateMutex ();
147175 }
@@ -153,6 +181,9 @@ void USBCDC::begin(unsigned long baud) {
153181}
154182
155183void USBCDC::end () {
184+ if (itf >= CFG_TUD_CDC) {
185+ return ;
186+ }
156187 connected = false ;
157188 devices[itf] = NULL ;
158189 setRxBufferSize (0 );
@@ -298,14 +329,14 @@ bool USBCDC::rebootEnabled(void) {
298329}
299330
300331int USBCDC::available (void ) {
301- if (itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL ) {
332+ if (itf >= CFG_TUD_CDC || rx_queue == NULL ) {
302333 return -1 ;
303334 }
304335 return uxQueueMessagesWaiting (rx_queue);
305336}
306337
307338int USBCDC::peek (void ) {
308- if (itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL ) {
339+ if (itf >= CFG_TUD_CDC || rx_queue == NULL ) {
309340 return -1 ;
310341 }
311342 uint8_t c;
@@ -316,7 +347,7 @@ int USBCDC::peek(void) {
316347}
317348
318349int USBCDC::read (void ) {
319- if (itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL ) {
350+ if (itf >= CFG_TUD_CDC || rx_queue == NULL ) {
320351 return -1 ;
321352 }
322353 uint8_t c = 0 ;
@@ -327,7 +358,7 @@ int USBCDC::read(void) {
327358}
328359
329360size_t USBCDC::read (uint8_t *buffer, size_t size) {
330- if (itf >= MAX_USB_CDC_DEVICES || rx_queue == NULL ) {
361+ if (itf >= CFG_TUD_CDC || rx_queue == NULL ) {
331362 return -1 ;
332363 }
333364 uint8_t c = 0 ;
@@ -339,7 +370,7 @@ size_t USBCDC::read(uint8_t *buffer, size_t size) {
339370}
340371
341372void USBCDC::flush (void ) {
342- if (itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || !tud_cdc_n_connected (itf)) {
373+ if (itf >= CFG_TUD_CDC || tx_lock == NULL || !tud_cdc_n_connected (itf)) {
343374 return ;
344375 }
345376 if (xSemaphoreTake (tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS) {
@@ -350,7 +381,7 @@ void USBCDC::flush(void) {
350381}
351382
352383int USBCDC::availableForWrite (void ) {
353- if (itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || !tud_cdc_n_connected (itf)) {
384+ if (itf >= CFG_TUD_CDC || tx_lock == NULL || !tud_cdc_n_connected (itf)) {
354385 return 0 ;
355386 }
356387 if (xSemaphoreTake (tx_lock, tx_timeout_ms / portTICK_PERIOD_MS) != pdPASS) {
@@ -362,7 +393,7 @@ int USBCDC::availableForWrite(void) {
362393}
363394
364395size_t USBCDC::write (const uint8_t *buffer, size_t size) {
365- if (itf >= MAX_USB_CDC_DEVICES || tx_lock == NULL || buffer == NULL || size == 0 || !tud_cdc_n_connected (itf)) {
396+ if (itf >= CFG_TUD_CDC || tx_lock == NULL || buffer == NULL || size == 0 || !tud_cdc_n_connected (itf)) {
366397 return 0 ;
367398 }
368399 if (xPortInIsrContext ()) {
@@ -415,6 +446,9 @@ uint32_t USBCDC::baudRate() {
415446}
416447
417448void USBCDC::setDebugOutput (bool en) {
449+ if (itf) {
450+ return ;
451+ }
418452 if (en) {
419453 uartSetDebug (NULL );
420454 ets_install_putc2 ((void (*)(char )) & cdc0_write_char);
@@ -424,7 +458,7 @@ void USBCDC::setDebugOutput(bool en) {
424458}
425459
426460USBCDC::operator bool () const {
427- if (itf >= MAX_USB_CDC_DEVICES ) {
461+ if (itf >= CFG_TUD_CDC ) {
428462 return false ;
429463 }
430464 return connected;
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