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51 changes: 31 additions & 20 deletions cores/esp32/HWCDC.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
#include "soc/io_mux_reg.h"
#pragma GCC diagnostic ignored "-Wvolatile"
#include "hal/usb_serial_jtag_ll.h"
#include "hal/usb_phy_ll.h"
#pragma GCC diagnostic warning "-Wvolatile"
#include "rom/ets_sys.h"
#include "driver/usb_serial_jtag.h"
Expand Down Expand Up @@ -86,7 +87,7 @@ static void hw_cdc_isr_handler(void *arg) {
} else {
connected = true;
}
if (usb_serial_jtag_ll_txfifo_writable() == 1) {
if (tx_ring_buf != NULL && usb_serial_jtag_ll_txfifo_writable() == 1) {
// We disable the interrupt here so that the interrupt won't be triggered if there is no data to send.
usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY);
size_t queued_size;
Expand Down Expand Up @@ -164,6 +165,9 @@ bool HWCDC::isCDC_Connected()
}

static void ARDUINO_ISR_ATTR cdc0_write_char(char c) {
if(tx_ring_buf == NULL) {
return;
}
uint32_t tx_timeout_ms = 0;
if(HWCDC::isConnected()) {
tx_timeout_ms = requested_tx_timeout_ms;
Expand Down Expand Up @@ -238,31 +242,37 @@ void HWCDC::begin(unsigned long baud)
log_e("HW CDC TX Buffer error");
}
}
usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY | USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT | USB_SERIAL_JTAG_INTR_BUS_RESET);
if(!intr_handle && esp_intr_alloc(ETS_USB_SERIAL_JTAG_INTR_SOURCE, 0, hw_cdc_isr_handler, NULL, &intr_handle) != ESP_OK){
isr_log_e("HW USB CDC failed to init interrupts");
end();
return;
}
// Setting USB D+ D- pins
uint8_t pin = ESP32_BUS_TYPE_USB_DM;
if(perimanGetPinBusType(pin) != ESP32_BUS_TYPE_INIT){
if(!perimanClearPinBus(pin)){
// Setting USB D+ D- pins || reduces number of debug messages
uint8_t pin = USB_DM_GPIO_NUM;
if(perimanGetPinBusType(pin) != ESP32_BUS_TYPE_USB_DM){
if(perimanGetPinBusType(pin) != ESP32_BUS_TYPE_INIT){
if(!perimanClearPinBus(pin)){
goto err;
}
}
if(!perimanSetPinBus(pin, ESP32_BUS_TYPE_USB_DM, (void *) this, -1, -1)){
goto err;
}
}
if(!perimanSetPinBus(pin, ESP32_BUS_TYPE_USB_DM, (void *) this, -1, -1)){
goto err;
}
pin = ESP32_BUS_TYPE_USB_DP;
if(perimanGetPinBusType(pin) != ESP32_BUS_TYPE_INIT){
if(!perimanClearPinBus(pin)){
pin = USB_DP_GPIO_NUM;
if(perimanGetPinBusType(pin) != ESP32_BUS_TYPE_USB_DP){
if(perimanGetPinBusType(pin) != ESP32_BUS_TYPE_INIT){
if(!perimanClearPinBus(pin)){
goto err;
}
}
if(!perimanSetPinBus(pin, ESP32_BUS_TYPE_USB_DP, (void *) this, -1, -1)){
goto err;
}
}
if(!perimanSetPinBus(pin, ESP32_BUS_TYPE_USB_DP, (void *) this, -1, -1)){
goto err;
// Configure PHY
usb_phy_ll_int_jtag_enable(&USB_SERIAL_JTAG);
usb_serial_jtag_ll_disable_intr_mask(USB_SERIAL_JTAG_LL_INTR_MASK);
usb_serial_jtag_ll_ena_intr_mask(USB_SERIAL_JTAG_INTR_SERIAL_IN_EMPTY | USB_SERIAL_JTAG_INTR_SERIAL_OUT_RECV_PKT | USB_SERIAL_JTAG_INTR_BUS_RESET);
if(!intr_handle && esp_intr_alloc(ETS_USB_SERIAL_JTAG_INTR_SOURCE, 0, hw_cdc_isr_handler, NULL, &intr_handle) != ESP_OK){
isr_log_e("HW USB CDC failed to init interrupts");
end();
return;
}
return;

Expand All @@ -289,6 +299,7 @@ void HWCDC::end()
arduino_hw_cdc_event_loop_handle = NULL;
}
HWCDC::deinit(this);
setDebugOutput(false);
connected = false;
}

Expand Down