diff options
Diffstat (limited to 'tmk_core/protocol/serial_uart.c')
| -rw-r--r-- | tmk_core/protocol/serial_uart.c | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/tmk_core/protocol/serial_uart.c b/tmk_core/protocol/serial_uart.c deleted file mode 100644 index d5b5657095..0000000000 --- a/tmk_core/protocol/serial_uart.c +++ /dev/null @@ -1,133 +0,0 @@ -/* -Copyright 2013 Jun WAKO <wakojun@gmail.com> - -This software is licensed with a Modified BSD License. -All of this is supposed to be Free Software, Open Source, DFSG-free, -GPL-compatible, and OK to use in both free and proprietary applications. -Additions and corrections to this file are welcome. - - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in - the documentation and/or other materials provided with the - distribution. - -* Neither the name of the copyright holders nor the names of - contributors may be used to endorse or promote products derived - from this software without specific prior written permission. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -*/ - -#include <stdbool.h> -#include <avr/io.h> -#include <avr/interrupt.h> -#include "serial.h" - -#ifndef SERIAL_UART_BAUD -# define SERIAL_UART_BAUD 9600 -#endif - -#define SERIAL_UART_UBRR (F_CPU / (16UL * SERIAL_UART_BAUD) - 1) -#define SERIAL_UART_TXD_READY (UCSR1A & _BV(UDRE1)) -#define SERIAL_UART_RXD_VECT USART1_RX_vect - -#ifndef SERIAL_UART_INIT_CUSTOM -# define SERIAL_UART_INIT_CUSTOM \ - /* enable TX */ \ - UCSR1B = _BV(TXEN1); \ - /* 8-bit data */ \ - UCSR1C = _BV(UCSZ11) | _BV(UCSZ10); -#endif - -#if defined(SERIAL_UART_RTS_LO) && defined(SERIAL_UART_RTS_HI) -// Buffer state -// Empty: RBUF_SPACE == RBUF_SIZE(head==tail) -// Last 1 space: RBUF_SPACE == 2 -// Full: RBUF_SPACE == 1(last cell of rbuf be never used.) -# define RBUF_SPACE() (rbuf_head < rbuf_tail ? (rbuf_tail - rbuf_head) : (RBUF_SIZE - rbuf_head + rbuf_tail)) -// allow to send -# define rbuf_check_rts_lo() \ - do { \ - if (RBUF_SPACE() > 2) SERIAL_UART_RTS_LO(); \ - } while (0) -// prohibit to send -# define rbuf_check_rts_hi() \ - do { \ - if (RBUF_SPACE() <= 2) SERIAL_UART_RTS_HI(); \ - } while (0) -#else -# define rbuf_check_rts_lo() -# define rbuf_check_rts_hi() -#endif - -void serial_init(void) { - do { - // Set baud rate - UBRR1L = SERIAL_UART_UBRR; - UBRR1L = SERIAL_UART_UBRR >> 8; - SERIAL_UART_INIT_CUSTOM; - } while (0); -} - -// RX ring buffer -#define RBUF_SIZE 256 -static uint8_t rbuf[RBUF_SIZE]; -static uint8_t rbuf_head = 0; -static uint8_t rbuf_tail = 0; - -uint8_t serial_recv(void) { - uint8_t data = 0; - if (rbuf_head == rbuf_tail) { - return 0; - } - - data = rbuf[rbuf_tail]; - rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; - rbuf_check_rts_lo(); - return data; -} - -int16_t serial_recv2(void) { - uint8_t data = 0; - if (rbuf_head == rbuf_tail) { - return -1; - } - - data = rbuf[rbuf_tail]; - rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; - rbuf_check_rts_lo(); - return data; -} - -void serial_send(uint8_t data) { - while (!SERIAL_UART_TXD_READY) - ; - SERIAL_UART_DATA = data; -} - -// USART RX complete interrupt -ISR(SERIAL_UART_RXD_VECT) { - uint8_t next = (rbuf_head + 1) % RBUF_SIZE; - if (next != rbuf_tail) { - rbuf[rbuf_head] = SERIAL_UART_DATA; - rbuf_head = next; - } - rbuf_check_rts_hi(); -} |