Takaaki Numai / mbed-dev

inport from local

Dependents:   Hobbyking_Cheetah_0511

targets/TARGET_STM/TARGET_STM32F4/spi_api.c@0:85b3fd62ea1a, 2020-03-16 (annotated)

Committer:
NYX
Date:
Mon Mar 16 06:35:48 2020 +0000
Revision:
0:85b3fd62ea1a
reinport to mbed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
NYX 0:85b3fd62ea1a 1 /* mbed Microcontroller Library
NYX 0:85b3fd62ea1a 2 *******************************************************************************
NYX 0:85b3fd62ea1a 3 * Copyright (c) 2015, STMicroelectronics
NYX 0:85b3fd62ea1a 4 * All rights reserved.
NYX 0:85b3fd62ea1a 5 *
NYX 0:85b3fd62ea1a 6 * Redistribution and use in source and binary forms, with or without
NYX 0:85b3fd62ea1a 7 * modification, are permitted provided that the following conditions are met:
NYX 0:85b3fd62ea1a 8 *
NYX 0:85b3fd62ea1a 9 * 1. Redistributions of source code must retain the above copyright notice,
NYX 0:85b3fd62ea1a 10 * this list of conditions and the following disclaimer.
NYX 0:85b3fd62ea1a 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
NYX 0:85b3fd62ea1a 12 * this list of conditions and the following disclaimer in the documentation
NYX 0:85b3fd62ea1a 13 * and/or other materials provided with the distribution.
NYX 0:85b3fd62ea1a 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
NYX 0:85b3fd62ea1a 15 * may be used to endorse or promote products derived from this software
NYX 0:85b3fd62ea1a 16 * without specific prior written permission.
NYX 0:85b3fd62ea1a 17 *
NYX 0:85b3fd62ea1a 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
NYX 0:85b3fd62ea1a 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
NYX 0:85b3fd62ea1a 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
NYX 0:85b3fd62ea1a 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
NYX 0:85b3fd62ea1a 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
NYX 0:85b3fd62ea1a 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
NYX 0:85b3fd62ea1a 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
NYX 0:85b3fd62ea1a 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
NYX 0:85b3fd62ea1a 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
NYX 0:85b3fd62ea1a 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
NYX 0:85b3fd62ea1a 28 *******************************************************************************
NYX 0:85b3fd62ea1a 29 */
NYX 0:85b3fd62ea1a 30 #include "mbed_assert.h"
NYX 0:85b3fd62ea1a 31 #include "mbed_error.h"
NYX 0:85b3fd62ea1a 32 #include "spi_api.h"
NYX 0:85b3fd62ea1a 33
NYX 0:85b3fd62ea1a 34 #if DEVICE_SPI
NYX 0:85b3fd62ea1a 35 #include <stdbool.h>
NYX 0:85b3fd62ea1a 36 #include <math.h>
NYX 0:85b3fd62ea1a 37 #include <string.h>
NYX 0:85b3fd62ea1a 38 #include "cmsis.h"
NYX 0:85b3fd62ea1a 39 #include "pinmap.h"
NYX 0:85b3fd62ea1a 40 #include "PeripheralPins.h"
NYX 0:85b3fd62ea1a 41
NYX 0:85b3fd62ea1a 42 #if DEVICE_SPI_ASYNCH
NYX 0:85b3fd62ea1a 43 #define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
NYX 0:85b3fd62ea1a 44 #else
NYX 0:85b3fd62ea1a 45 #define SPI_S(obj) (( struct spi_s *)(obj))
NYX 0:85b3fd62ea1a 46 #endif
NYX 0:85b3fd62ea1a 47
NYX 0:85b3fd62ea1a 48 /*
NYX 0:85b3fd62ea1a 49 * Only the frequency is managed in the family specific part
NYX 0:85b3fd62ea1a 50 * the rest of SPI management is common to all STM32 families
NYX 0:85b3fd62ea1a 51 */
NYX 0:85b3fd62ea1a 52 int spi_get_clock_freq(spi_t *obj) {
NYX 0:85b3fd62ea1a 53 struct spi_s *spiobj = SPI_S(obj);
NYX 0:85b3fd62ea1a 54 int spi_hz = 0;
NYX 0:85b3fd62ea1a 55
NYX 0:85b3fd62ea1a 56 /* Get source clock depending on SPI instance */
NYX 0:85b3fd62ea1a 57 switch ((int)spiobj->spi) {
NYX 0:85b3fd62ea1a 58 case SPI_1:
NYX 0:85b3fd62ea1a 59 #if defined SPI4_BASE
NYX 0:85b3fd62ea1a 60 case SPI_4:
NYX 0:85b3fd62ea1a 61 #endif
NYX 0:85b3fd62ea1a 62 #if defined SPI5_BASE
NYX 0:85b3fd62ea1a 63 case SPI_5:
NYX 0:85b3fd62ea1a 64 #endif
NYX 0:85b3fd62ea1a 65 #if defined SPI6_BASE
NYX 0:85b3fd62ea1a 66 case SPI_6:
NYX 0:85b3fd62ea1a 67 #endif
NYX 0:85b3fd62ea1a 68 /* SPI_1, SPI_4, SPI_5 and SPI_6. Source CLK is PCKL2 */
NYX 0:85b3fd62ea1a 69 spi_hz = HAL_RCC_GetPCLK2Freq();
NYX 0:85b3fd62ea1a 70 break;
NYX 0:85b3fd62ea1a 71 case SPI_2:
NYX 0:85b3fd62ea1a 72 #if defined SPI3_BASE
NYX 0:85b3fd62ea1a 73 case SPI_3:
NYX 0:85b3fd62ea1a 74 #endif
NYX 0:85b3fd62ea1a 75 /* SPI_2 and SPI_3. Source CLK is PCKL1 */
NYX 0:85b3fd62ea1a 76 spi_hz = HAL_RCC_GetPCLK1Freq();
NYX 0:85b3fd62ea1a 77 break;
NYX 0:85b3fd62ea1a 78 default:
NYX 0:85b3fd62ea1a 79 error("CLK: SPI instance not set");
NYX 0:85b3fd62ea1a 80 break;
NYX 0:85b3fd62ea1a 81 }
NYX 0:85b3fd62ea1a 82 return spi_hz;
NYX 0:85b3fd62ea1a 83 }
NYX 0:85b3fd62ea1a 84
NYX 0:85b3fd62ea1a 85 #endif