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- /* mbed Microcontroller Library
- *******************************************************************************
- * Copyright (c) 2015, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *******************************************************************************
- */
- #include "mbed_assert.h"
- #include "spi_api.h"
- #if DEVICE_SPI
- #include "cmsis.h"
- #include "pinmap.h"
- #include "mbed_error.h"
- #include "PeripheralPins.h"
- #if DEVICE_SPI_ASYNCH
- #define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
- #else
- #define SPI_S(obj) (( struct spi_s *)(obj))
- #endif
- /*
- * Only the frequency is managed in the family specific part
- * the rest of SPI management is common to all STM32 families
- */
- int spi_get_clock_freq(spi_t *obj)
- {
- struct spi_s *spiobj = SPI_S(obj);
- int spi_hz = 0;
- /* Get source clock depending on SPI instance */
- switch ((int)spiobj->spi) {
- case SPI_1:
- /* SPI_1. Source CLK is PCKL2 */
- spi_hz = HAL_RCC_GetPCLK2Freq();
- break;
- #if defined(SPI2_BASE)
- case SPI_2:
- #endif
- case SPI_3:
- /* SPI_2, SPI_3. Source CLK is PCKL1 */
- spi_hz = HAL_RCC_GetPCLK1Freq();
- break;
- default:
- error("CLK: SPI instance not set");
- break;
- }
- return spi_hz;
- }
- #endif
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