circuitpython/ports/teensy/usb.c

#include <string.h>

#include "py/runtime.h"

#include "Arduino.h"

#include "usb.h"
#include "usb_serial.h"

bool usb_vcp_is_connected(void) {
    return usb_configuration && (usb_cdc_line_rtsdtr & (USB_SERIAL_DTR | USB_SERIAL_RTS));
}

bool usb_vcp_is_enabled(void) {
    return true;
}

int usb_vcp_rx_num(void) {
    return usb_serial_available();
}

int usb_vcp_recv_byte(uint8_t *ptr) {
    int ch = usb_serial_getchar();
    if (ch < 0) {
        return 0;
    }
    *ptr = ch;
    return 1;
}

void usb_vcp_send_str(const char *str) {
    usb_vcp_send_strn(str, strlen(str));
}

void usb_vcp_send_strn(const char *str, int len) {
    usb_serial_write(str, len);
}

void usb_vcp_send_strn_cooked(const char *str, int len) {
    for (const char *top = str + len; str < top; str++) {
        if (*str == '\n') {
            usb_serial_putchar('\r');
        }
        usb_serial_putchar(*str);
    }
}