mirror of https://github.com/ARMmbed/mbed-os.git
66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "drivers/SAI.h"
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#include "platform/mbed_critical.h"
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#if DEVICE_SAI
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namespace mbed {
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SAI::SAI(PinName mclk, PinName bclk, PinName wclk, PinName sd,
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const sai_format_t *fmt, bool is_input, uint32_t master_clock, bool internal_mclk
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) : _sai(), _mutex(), _is_input(is_input) {
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// No lock needed in the constructor
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sai_init_t init = {};
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init.mclk = mclk;
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init.bclk = bclk;
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init.wclk = wclk;
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init.sd = sd;
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init.is_receiver = is_input;
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init.sample_rate = SAI_DEFAULT_SAMPLE_RATE;
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init.mclk_source = SAI_CLOCK_SOURCE_INTERNAL;
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init.input_mclk_frequency = 0; // 0 means find it by yourself.
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init.output_mclk_frequency = 256 * init.sample_rate;
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init.format = *fmt;
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_status = sai_init(&_sai, &init);
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}
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bool SAI::xfer(uint32_t *value) {
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lock();
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bool ret = sai_transfer(&_sai, value);
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unlock();
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return ret;
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}
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sai_result_t SAI::status(void) {
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return _status;
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}
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void SAI::lock() {
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_mutex.lock();
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}
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void SAI::unlock() {
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_mutex.unlock();
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}
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} // namespace mbed
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#endif
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