| /* |
| * Copyright (C) 2019 sysmocom -s.f.m.c. GmbH, Author: Kevin Redon <kredon@sysmocom.de> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "atmel_start.h" |
| #include "atmel_start_pins.h" |
| |
| volatile static bool data_arrived = false; |
| |
| static void tx_cb_UART_debug(const struct usart_async_descriptor *const io_descr) |
| { |
| /* Transfer completed */ |
| //gpio_toggle_pin_level(LED_system); |
| } |
| |
| static void rx_cb_UART_debug(const struct usart_async_descriptor *const io_descr) |
| { |
| /* Receive completed */ |
| gpio_toggle_pin_level(USER_LED); |
| data_arrived = true; |
| } |
| |
| int main(void) |
| { |
| atmel_start_init(); |
| |
| usart_async_register_callback(&UART_debug, USART_ASYNC_TXC_CB, tx_cb_UART_debug); |
| usart_async_register_callback(&UART_debug, USART_ASYNC_RXC_CB, rx_cb_UART_debug); |
| usart_async_enable(&UART_debug); |
| |
| usb_start(); |
| |
| while (true) { // main loop |
| if (data_arrived) { // input on UART debug |
| data_arrived = false; // clear flag |
| uint8_t recv_char; // to store the input |
| while (io_read(&UART_debug.io, &recv_char, 1) == 1) { // read input |
| while (io_write(&UART_debug.io, &recv_char, 1) != 1); // echo back to output |
| } |
| } |
| } |
| } |