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1 /*
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2 gbasys - a gameboy advance hardware abstraction library
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3 Copyright (C) 2004-2012 John Tsiombikas <nuclear@member.fsf.org>
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18 #ifndef COMM_H_
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19 #define COMM_H_
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20
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21 enum {
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22 COMM_SIO8_MASTER,
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23 COMM_SIO8_SLAVE,
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24 COMM_SIO32_MASTER,
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25 COMM_SIO32_SLAVE,
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26 COMM_UART,
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27 COMM_GPIO
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28 };
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29
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30 void comm_setup(int mode);
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31
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32 /* synchronous transfer, blocks until complete */
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33 void sio_transfer(void *in, const void *out);
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34
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35 /* async transfer, returns immediately, raises SIGIO when complete */
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36 void sio_transfer_async(void *in, const void *out);
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37
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38
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39 /* GPIO functions */
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40 enum { GPIO_DIR_IN, GPIO_DIR_OUT };
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41
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42 void gpio_dir(int dir_so, int dir_si, int dir_sd, int dir_sc);
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43 void gpio_dir_mask(unsigned char dir);
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44
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45 void gpio_set(unsigned char val);
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46 unsigned char gpio_get(void);
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47
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48 #endif /* COMM_H_ */
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