mirror of https://github.com/ARMmbed/mbed-os.git
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/* mbed Microcontroller Library
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* SPDX-License-Identifier: BSD-3-Clause
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******************************************************************************
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*
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* Copyright (c) 2015-2020 STMicroelectronics.
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* All rights reserved.
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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#include "mbed_assert.h"
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#include "mbed_error.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 "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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#if defined SPI1_BASE
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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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#endif
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#if defined SPI2_BASE
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case SPI_2:
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/* SPI_2 and 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 and 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 SPI4_BASE
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case SPI_4:
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/* SPI_4. Source CLK is PCKL2 */
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spi_hz = HAL_RCC_GetPCLK2Freq();
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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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