| /* Target dependent code for ARC processor family, for GDB, the GNU debugger. |
| |
| Copyright 2008, 2009 Free Software Foundation, Inc. |
| |
| Contributed by ARC International (www.arc.com) |
| |
| Authors: |
| Richard Stuckey <richard.stuckey@arc.com> |
| |
| This file is part of GDB. |
| |
| 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 3 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, see <http://www.gnu.org/licenses/>. */ |
| |
| /******************************************************************************/ |
| /* */ |
| /* Outline: */ |
| /* This header file defines operations for reading data from / writing */ |
| /* data to a parallel port using a GPIO (General Purpose Input/Output) */ |
| /* driver. */ |
| /* */ |
| /******************************************************************************/ |
| |
| #ifndef ARC_GPIO_H |
| #define ARC_GPIO_H |
| |
| /* ARC header files */ |
| #include "arc-support.h" |
| |
| |
| #define GPIO_DEVICE "/dev/gpio" |
| |
| |
| typedef enum |
| { |
| DATA_PORT = 0, |
| STATUS_PORT = 1, |
| CONTROL_PORT = 2 |
| } ParallelPort; |
| |
| typedef unsigned char Byte; |
| |
| typedef struct |
| { |
| ParallelPort port; |
| Byte data; |
| } GPIO_Pair; |
| |
| |
| Boolean gpio_open (void); |
| void gpio_close (void); |
| |
| void gpio_write (ParallelPort port, Byte data); |
| Byte gpio_read (ParallelPort port); |
| |
| void gpio_write_array (GPIO_Pair array[], unsigned int num_elements); |
| |
| |
| extern Boolean gpio_port_error; |
| |
| #endif /* ARC_GPIO_H */ |
| /******************************************************************************/ |