| | 1 | /* vim:ts=4 sts=4 et tw=80 |
| | 2 | * |
| | 3 | * fnordlicht firmware |
| | 4 | * |
| | 5 | * for additional information please |
| | 6 | * see http://lochraster.org/fnordlichtmini |
| | 7 | * |
| | 8 | * (c) by Alexander Neumann <alexander@bumpern.de> |
| | 9 | * Lars Noschinski <lars@public.noschinski.de> |
| | 10 | * |
| | 11 | * This program is free software: you can redistribute it and/or modify it |
| | 12 | * under the terms of the GNU General Public License version 3 as published by |
| | 13 | * the Free Software Foundation. |
| | 14 | * |
| | 15 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| | 16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| | 18 | * more details. |
| | 19 | * |
| | 20 | * You should have received a copy of the GNU General Public License along with |
| | 21 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| | 22 | */ |
| | 23 | |
| | 24 | #ifndef UART_H |
| | 25 | #define UART_H |
| | 26 | |
| | 27 | #include "globals.h" |
| | 28 | #include "fifo.h" |
| | 29 | #include "../common/io.h" |
| | 30 | |
| | 31 | #if !CONFIG_SERIAL |
| | 32 | |
| | 33 | #define uart_init(...) |
| | 34 | #define uart_putc(...) |
| | 35 | |
| | 36 | #else |
| | 37 | |
| | 38 | /* structs */ |
| | 39 | struct global_uart_t { |
| | 40 | fifo_t rx; |
| | 41 | #if UART_TX_ENABLED |
| | 42 | fifo_t tx; |
| | 43 | #endif |
| | 44 | }; |
| | 45 | |
| | 46 | /* global variables */ |
| | 47 | extern volatile struct global_uart_t global_uart; |
| | 48 | |
| | 49 | /* prototypes */ |
| | 50 | void uart_init(void); |
| | 51 | void uart_putc(uint8_t data); |
| | 52 | |
| | 53 | #if UART_TX_ENABLED |
| | 54 | static inline bool uart_send_complete(void) |
| | 55 | { |
| | 56 | return _BV(_UDRE_UART0) & _UCSRA_UART0; |
| | 57 | } |
| | 58 | #else |
| | 59 | /* we're never incomplete, never. */ |
| | 60 | #define uart_send_complete() 1 |
| | 61 | #endif |
| | 62 | |
| | 63 | #endif |
| | 64 | |
| | 65 | #endif |
projects / fnordlicht-mini / blame_incremental