spisl.h File Reference

This file contains the whole API as static inline functions, since all functions are very short. More...

#include "raspi/hw.h"
#include <stdint.h>

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Functions
static void	spisl_init ()
	Configure PCM hardware to act as SPI slave.
static int	spisl_poll (int num)
	Return true if at least num bytes are available in the receive FIFO. Only guaranteed to work correctly with num == 1. Larger values may return true even if less bytes (but at least one) are available.
static uint8_t	spisl_read (void)
	Read a single byte received via SPI. Block if FIFO is currently empty.
static void	spisl_write (uint8_t data)
	Send data via SPI. Block if FIFO is currently full. Note that an SPI slave only sends while receiving, so data is only sent while the master transmits a new byte, which may be much later (or never).
static void	spisl_flush ()
	Block until transmit FIFO is empty.
static void	spisl_synchronize (void)
	Synchronize to SPI master. More...

Detailed Description

This file contains the whole API as static inline functions, since all functions are very short.

There is no accompanying C file.

License

Copyright (c) 2013 OFFIS e.V.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.