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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "py/mpconfig.h"
#include "supervisor/shared/display.h"
#include "shared-bindings/terminalio/Terminal.h"
#include "supervisor/serial.h"
#include "supervisor/usb.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "tusb.h"
/*
* Note: DEBUG_UART currently only works on STM32,
* enabling on another platform will cause a crash.
*/
#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
#include "shared-bindings/busio/UART.h"
busio_uart_obj_t debug_uart;
byte buf_array[64];
#endif
#if CIRCUITPY_USB_VENDOR
bool tud_vendor_connected(void);
#endif
void serial_early_init(void) {
#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
debug_uart.base.type = &busio_uart_type;
const mcu_pin_obj_t *rx = MP_OBJ_TO_PTR(DEBUG_UART_RX);
const mcu_pin_obj_t *tx = MP_OBJ_TO_PTR(DEBUG_UART_TX);
common_hal_busio_uart_construct(&debug_uart, tx, rx, NULL, NULL, NULL,
false, 115200, 8, UART_PARITY_NONE, 1, 1.0f, 64,
buf_array, true);
common_hal_busio_uart_never_reset(&debug_uart);
#endif
}
void serial_init(void) {
usb_init();
}
bool serial_connected(void) {
#if CIRCUITPY_USB_VENDOR
if (tud_vendor_connected()) {
return true;
}
#endif
#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
return true;
#else
return tud_cdc_connected();
#endif
}
char serial_read(void) {
#if CIRCUITPY_USB_VENDOR
if (tud_vendor_connected() && tud_vendor_available() > 0) {
char tiny_buffer;
tud_vendor_read(&tiny_buffer, 1);
return tiny_buffer;
}
#endif
#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
if (tud_cdc_connected() && tud_cdc_available() > 0) {
return (char)tud_cdc_read_char();
}
int uart_errcode;
char text;
common_hal_busio_uart_read(&debug_uart, (uint8_t *)&text, 1, &uart_errcode);
return text;
#else
return (char)tud_cdc_read_char();
#endif
}
bool serial_bytes_available(void) {
#if CIRCUITPY_USB_VENDOR
if (tud_vendor_connected() && tud_vendor_available() > 0) {
return true;
}
#endif
#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
return common_hal_busio_uart_rx_characters_available(&debug_uart) || (tud_cdc_available() > 0);
#else
return tud_cdc_available() > 0;
#endif
}
void serial_write_substring(const char *text, uint32_t length) {
if (length == 0) {
return;
}
#if CIRCUITPY_TERMINALIO
int errcode;
common_hal_terminalio_terminal_write(&supervisor_terminal, (const uint8_t *)text, length, &errcode);
#endif
#if CIRCUITPY_USB_VENDOR
if (tud_vendor_connected()) {
tud_vendor_write(text, length);
}
#endif
uint32_t count = 0;
while (count < length && tud_cdc_connected()) {
count += tud_cdc_write(text + count, length - count);
usb_background();
}
#if defined(DEBUG_UART_TX) && defined(DEBUG_UART_RX)
int uart_errcode;
common_hal_busio_uart_write(&debug_uart, (const uint8_t *)text, length, &uart_errcode);
#endif
}
void serial_write(const char *text) {
serial_write_substring(text, strlen(text));
}
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