/* mbed Microcontroller Library * Copyright (c) 2019 STMicroelectronics * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #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_hz = HAL_RCC_GetPCLK2Freq(); break; #if defined SPI2_BASE case SPI_2: spi_hz = HAL_RCC_GetPCLK1Freq(); break; #endif default: error("CLK: SPI instance not set"); break; } return spi_hz; } #endif