mirror of https://github.com/ARMmbed/mbed-os.git
69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2016-2020 STMicroelectronics
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* SPDX-License-Identifier: Apache-2.0
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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 "mbed_assert.h"
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#include "spi_api.h"
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#if DEVICE_SPI
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#include "cmsis.h"
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#include "pinmap.h"
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#include "mbed_error.h"
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#include "PeripheralPins.h"
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#if DEVICE_SPI_ASYNCH
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#define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
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#else
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#define SPI_S(obj) (( struct spi_s *)(obj))
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#endif
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/*
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* Only the frequency is managed in the family specific part
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* the rest of SPI management is common to all STM32 families
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*/
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int spi_get_clock_freq(spi_t *obj)
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{
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struct spi_s *spiobj = SPI_S(obj);
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int spi_hz = 0;
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/* Get source clock depending on SPI instance */
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switch ((int)spiobj->spi) {
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case SPI_1:
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/* SPI_1. Source CLK is PCKL2 */
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spi_hz = HAL_RCC_GetPCLK2Freq();
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break;
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#if defined(SPI2_BASE)
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case SPI_2:
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/* SPI_2, SPI_3. Source CLK is PCKL1 */
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spi_hz = HAL_RCC_GetPCLK1Freq();
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break;
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#endif
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#if defined(SPI3_BASE)
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case SPI_3:
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/* SPI_2, SPI_3. Source CLK is PCKL1 */
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spi_hz = HAL_RCC_GetPCLK1Freq();
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break;
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#endif
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default:
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error("CLK: SPI instance not set");
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break;
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}
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return spi_hz;
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}
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#endif
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