3 * Copyright 2006,2007 Free Software Foundation, Inc.
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #ifndef INCLUDED_SPI_H
20 #define INCLUDED_SPI_H
22 #include <memory_map.h>
26 * \brief One time call to initialize SPI
31 * \brief Wait for last SPI transaction to complete.
32 * Unless you need to know it completed, it's not necessary to call this.
36 #define SPI_TXONLY false // readback: no
37 #define SPI_TXRX true // readback: yes
40 * Flags for spi_transact
42 #define SPIF_PUSH_RISE 0 // push tx data on rising edge of SCLK
43 #define SPIF_PUSH_FALL SPI_CTRL_TXNEG // push tx data on falling edge of SCLK
44 #define SPIF_LATCH_RISE 0 // latch rx data on rising edge of SCLK
45 #define SPIF_LATCH_FALL SPI_CTRL_RXNEG // latch rx data on falling edge of SCLK
49 spi_transact(bool readback, int slave, uint32_t data, int length, uint32_t flags);
52 #endif /* INCLUDED_SPI_H */