Gan likun / The prosthetic control

The prosthetic control（MIT）

targets/TARGET_STM/TARGET_STM32F4/spi_api.c@0:20e0c61e0684, 2022-06-23 (annotated)

Committer:
ganlikun
Date:
Thu Jun 23 05:23:34 2022 +0000
Revision:
0:20e0c61e0684
01

Who changed what in which revision?

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ganlikun 0:20e0c61e0684 1 /* mbed Microcontroller Library
ganlikun 0:20e0c61e0684 2 *******************************************************************************
ganlikun 0:20e0c61e0684 3 * Copyright (c) 2015, STMicroelectronics
ganlikun 0:20e0c61e0684 4 * All rights reserved.
ganlikun 0:20e0c61e0684 5 *
ganlikun 0:20e0c61e0684 6 * Redistribution and use in source and binary forms, with or without
ganlikun 0:20e0c61e0684 7 * modification, are permitted provided that the following conditions are met:
ganlikun 0:20e0c61e0684 8 *
ganlikun 0:20e0c61e0684 9 * 1. Redistributions of source code must retain the above copyright notice,
ganlikun 0:20e0c61e0684 10 * this list of conditions and the following disclaimer.
ganlikun 0:20e0c61e0684 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
ganlikun 0:20e0c61e0684 12 * this list of conditions and the following disclaimer in the documentation
ganlikun 0:20e0c61e0684 13 * and/or other materials provided with the distribution.
ganlikun 0:20e0c61e0684 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ganlikun 0:20e0c61e0684 15 * may be used to endorse or promote products derived from this software
ganlikun 0:20e0c61e0684 16 * without specific prior written permission.
ganlikun 0:20e0c61e0684 17 *
ganlikun 0:20e0c61e0684 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ganlikun 0:20e0c61e0684 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ganlikun 0:20e0c61e0684 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ganlikun 0:20e0c61e0684 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ganlikun 0:20e0c61e0684 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ganlikun 0:20e0c61e0684 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ganlikun 0:20e0c61e0684 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ganlikun 0:20e0c61e0684 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ganlikun 0:20e0c61e0684 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ganlikun 0:20e0c61e0684 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ganlikun 0:20e0c61e0684 28 *******************************************************************************
ganlikun 0:20e0c61e0684 29 */
ganlikun 0:20e0c61e0684 30 #include "mbed_assert.h"
ganlikun 0:20e0c61e0684 31 #include "mbed_error.h"
ganlikun 0:20e0c61e0684 32 #include "spi_api.h"
ganlikun 0:20e0c61e0684 33
ganlikun 0:20e0c61e0684 34 #if DEVICE_SPI
ganlikun 0:20e0c61e0684 35 #include <stdbool.h>
ganlikun 0:20e0c61e0684 36 #include <math.h>
ganlikun 0:20e0c61e0684 37 #include <string.h>
ganlikun 0:20e0c61e0684 38 #include "cmsis.h"
ganlikun 0:20e0c61e0684 39 #include "pinmap.h"
ganlikun 0:20e0c61e0684 40 #include "PeripheralPins.h"
ganlikun 0:20e0c61e0684 41
ganlikun 0:20e0c61e0684 42 #if DEVICE_SPI_ASYNCH
ganlikun 0:20e0c61e0684 43 #define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
ganlikun 0:20e0c61e0684 44 #else
ganlikun 0:20e0c61e0684 45 #define SPI_S(obj) (( struct spi_s *)(obj))
ganlikun 0:20e0c61e0684 46 #endif
ganlikun 0:20e0c61e0684 47
ganlikun 0:20e0c61e0684 48 /*
ganlikun 0:20e0c61e0684 49 * Only the frequency is managed in the family specific part
ganlikun 0:20e0c61e0684 50 * the rest of SPI management is common to all STM32 families
ganlikun 0:20e0c61e0684 51 */
ganlikun 0:20e0c61e0684 52 int spi_get_clock_freq(spi_t *obj) {
ganlikun 0:20e0c61e0684 53 struct spi_s *spiobj = SPI_S(obj);
ganlikun 0:20e0c61e0684 54 int spi_hz = 0;
ganlikun 0:20e0c61e0684 55
ganlikun 0:20e0c61e0684 56 /* Get source clock depending on SPI instance */
ganlikun 0:20e0c61e0684 57 switch ((int)spiobj->spi) {
ganlikun 0:20e0c61e0684 58 case SPI_1:
ganlikun 0:20e0c61e0684 59 #if defined SPI4_BASE
ganlikun 0:20e0c61e0684 60 case SPI_4:
ganlikun 0:20e0c61e0684 61 #endif
ganlikun 0:20e0c61e0684 62 #if defined SPI5_BASE
ganlikun 0:20e0c61e0684 63 case SPI_5:
ganlikun 0:20e0c61e0684 64 #endif
ganlikun 0:20e0c61e0684 65 #if defined SPI6_BASE
ganlikun 0:20e0c61e0684 66 case SPI_6:
ganlikun 0:20e0c61e0684 67 #endif
ganlikun 0:20e0c61e0684 68 /* SPI_1, SPI_4, SPI_5 and SPI_6. Source CLK is PCKL2 */
ganlikun 0:20e0c61e0684 69 spi_hz = HAL_RCC_GetPCLK2Freq();
ganlikun 0:20e0c61e0684 70 break;
ganlikun 0:20e0c61e0684 71 case SPI_2:
ganlikun 0:20e0c61e0684 72 #if defined SPI3_BASE
ganlikun 0:20e0c61e0684 73 case SPI_3:
ganlikun 0:20e0c61e0684 74 #endif
ganlikun 0:20e0c61e0684 75 /* SPI_2 and SPI_3. Source CLK is PCKL1 */
ganlikun 0:20e0c61e0684 76 spi_hz = HAL_RCC_GetPCLK1Freq();
ganlikun 0:20e0c61e0684 77 break;
ganlikun 0:20e0c61e0684 78 default:
ganlikun 0:20e0c61e0684 79 error("CLK: SPI instance not set");
ganlikun 0:20e0c61e0684 80 break;
ganlikun 0:20e0c61e0684 81 }
ganlikun 0:20e0c61e0684 82 return spi_hz;
ganlikun 0:20e0c61e0684 83 }
ganlikun 0:20e0c61e0684 84
ganlikun 0:20e0c61e0684 85 #endif
ganlikun 0:20e0c61e0684 86