SPISlave.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 #include "drivers/SPISlave.h"
00018 #include "mbed_assert.h"
00019 
00020 #if DEVICE_SPISLAVE
00021 
00022 namespace mbed {
00023 
00024 SPISlave::SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel) :
00025     _spi(),
00026     _bits(8),
00027     _mode(0),
00028     _hz(1000000)
00029 {
00030     spi_init(&_spi, mosi, miso, sclk, ssel);
00031     spi_format(&_spi, _bits, _mode, 1);
00032     spi_frequency(&_spi, _hz);
00033 }
00034 
00035 SPISlave::SPISlave(const spi_pinmap_t &pinmap) :
00036     _spi(),
00037     _bits(8),
00038     _mode(0),
00039     _hz(1000000)
00040 {
00041     spi_init_direct(&_spi, &pinmap);
00042     spi_format(&_spi, _bits, _mode, 1);
00043     spi_frequency(&_spi, _hz);
00044 }
00045 
00046 void SPISlave::format(int bits, int mode)
00047 {
00048     _bits = bits;
00049     _mode = mode;
00050     spi_format(&_spi, _bits, _mode, 1);
00051 }
00052 
00053 void SPISlave::frequency(int hz)
00054 {
00055     _hz = hz;
00056     spi_frequency(&_spi, _hz);
00057 }
00058 
00059 int SPISlave::receive(void)
00060 {
00061     return (spi_slave_receive(&_spi));
00062 }
00063 
00064 int SPISlave::read(void)
00065 {
00066     return (spi_slave_read(&_spi));
00067 }
00068 
00069 void SPISlave::reply(int value)
00070 {
00071     spi_slave_write(&_spi, value);
00072 }
00073 
00074 } // namespace mbed
00075 
00076 #endif