/* * Copyright 2012 Ettus Research LLC * Copyright 2006,2007 Free Software Foundation, Inc. * * 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 . */ #ifndef INCLUDED_SPI_H #define INCLUDED_SPI_H #include #include /*! * \brief One time call to initialize SPI */ void spi_init(void); /*! * \brief Wait for last SPI transaction to complete. * Unless you need to know it completed, it's not necessary to call this. */ void spi_wait(void); #define SPI_TXONLY false // readback: no #define SPI_TXRX true // readback: yes /* * Flags for spi_transact */ #define SPI_PUSH_RISE (1 << 0) // push tx data on rising edge of SCLK #define SPI_PUSH_FALL (1 << 1) // push tx data on falling edge of SCLK #define SPI_LATCH_RISE (1 << 2) // latch rx data on rising edge of SCLK #define SPI_LATCH_FALL (1 << 3) // latch rx data on falling edge of SCLK uint32_t spi_transact(bool readback, int slave, uint32_t data, int length, uint32_t flags); #endif /* INCLUDED_SPI_H */