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Diffstat (limited to 'firmware/microblaze/lib/spi.h')
| -rw-r--r-- | firmware/microblaze/lib/spi.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/firmware/microblaze/lib/spi.h b/firmware/microblaze/lib/spi.h new file mode 100644 index 000000000..f5b69b270 --- /dev/null +++ b/firmware/microblaze/lib/spi.h @@ -0,0 +1,52 @@ +/* -*- c -*- */ +/* + * 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 <http://www.gnu.org/licenses/>. + */ + +#ifndef INCLUDED_SPI_H +#define INCLUDED_SPI_H + +#include <memory_map.h> +#include <stdbool.h> + +/*! + * \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 SPIF_PUSH_RISE 0 // push tx data on rising edge of SCLK +#define SPIF_PUSH_FALL SPI_CTRL_TXNEG // push tx data on falling edge of SCLK +#define SPIF_LATCH_RISE 0 // latch rx data on rising edge of SCLK +#define SPIF_LATCH_FALL SPI_CTRL_RXNEG // 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 */ |