Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/spi_api.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 *******************************************************************************
lypinator 0:bb348c97df44 3 * Copyright (c) 2015, STMicroelectronics
lypinator 0:bb348c97df44 4 * All rights reserved.
lypinator 0:bb348c97df44 5 *
lypinator 0:bb348c97df44 6 * Redistribution and use in source and binary forms, with or without
lypinator 0:bb348c97df44 7 * modification, are permitted provided that the following conditions are met:
lypinator 0:bb348c97df44 8 *
lypinator 0:bb348c97df44 9 * 1. Redistributions of source code must retain the above copyright notice,
lypinator 0:bb348c97df44 10 * this list of conditions and the following disclaimer.
lypinator 0:bb348c97df44 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
lypinator 0:bb348c97df44 12 * this list of conditions and the following disclaimer in the documentation
lypinator 0:bb348c97df44 13 * and/or other materials provided with the distribution.
lypinator 0:bb348c97df44 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
lypinator 0:bb348c97df44 15 * may be used to endorse or promote products derived from this software
lypinator 0:bb348c97df44 16 * without specific prior written permission.
lypinator 0:bb348c97df44 17 *
lypinator 0:bb348c97df44 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
lypinator 0:bb348c97df44 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
lypinator 0:bb348c97df44 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lypinator 0:bb348c97df44 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
lypinator 0:bb348c97df44 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
lypinator 0:bb348c97df44 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
lypinator 0:bb348c97df44 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lypinator 0:bb348c97df44 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
lypinator 0:bb348c97df44 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
lypinator 0:bb348c97df44 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lypinator 0:bb348c97df44 28 *******************************************************************************
lypinator 0:bb348c97df44 29 */
lypinator 0:bb348c97df44 30 #include "mbed_assert.h"
lypinator 0:bb348c97df44 31 #include "mbed_error.h"
lypinator 0:bb348c97df44 32 #include "spi_api.h"
lypinator 0:bb348c97df44 33
lypinator 0:bb348c97df44 34 #if DEVICE_SPI
lypinator 0:bb348c97df44 35 #include <stdbool.h>
lypinator 0:bb348c97df44 36 #include <math.h>
lypinator 0:bb348c97df44 37 #include <string.h>
lypinator 0:bb348c97df44 38 #include "cmsis.h"
lypinator 0:bb348c97df44 39 #include "pinmap.h"
lypinator 0:bb348c97df44 40 #include "PeripheralPins.h"
lypinator 0:bb348c97df44 41
lypinator 0:bb348c97df44 42 #if DEVICE_SPI_ASYNCH
lypinator 0:bb348c97df44 43 #define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
lypinator 0:bb348c97df44 44 #else
lypinator 0:bb348c97df44 45 #define SPI_S(obj) (( struct spi_s *)(obj))
lypinator 0:bb348c97df44 46 #endif
lypinator 0:bb348c97df44 47
lypinator 0:bb348c97df44 48 /*
lypinator 0:bb348c97df44 49 * Only the frequency is managed in the family specific part
lypinator 0:bb348c97df44 50 * the rest of SPI management is common to all STM32 families
lypinator 0:bb348c97df44 51 */
lypinator 0:bb348c97df44 52 int spi_get_clock_freq(spi_t *obj)
lypinator 0:bb348c97df44 53 {
lypinator 0:bb348c97df44 54 struct spi_s *spiobj = SPI_S(obj);
lypinator 0:bb348c97df44 55 int spi_hz = 0;
lypinator 0:bb348c97df44 56
lypinator 0:bb348c97df44 57 /* Get source clock depending on SPI instance */
lypinator 0:bb348c97df44 58 switch ((int)spiobj->spi) {
lypinator 0:bb348c97df44 59 case SPI_1:
lypinator 0:bb348c97df44 60 #if defined SPI4_BASE
lypinator 0:bb348c97df44 61 case SPI_4:
lypinator 0:bb348c97df44 62 #endif
lypinator 0:bb348c97df44 63 #if defined SPI5_BASE
lypinator 0:bb348c97df44 64 case SPI_5:
lypinator 0:bb348c97df44 65 #endif
lypinator 0:bb348c97df44 66 #if defined SPI6_BASE
lypinator 0:bb348c97df44 67 case SPI_6:
lypinator 0:bb348c97df44 68 #endif
lypinator 0:bb348c97df44 69 /* SPI_1, SPI_4, SPI_5 and SPI_6. Source CLK is PCKL2 */
lypinator 0:bb348c97df44 70 spi_hz = HAL_RCC_GetPCLK2Freq();
lypinator 0:bb348c97df44 71 break;
lypinator 0:bb348c97df44 72 case SPI_2:
lypinator 0:bb348c97df44 73 #if defined SPI3_BASE
lypinator 0:bb348c97df44 74 case SPI_3:
lypinator 0:bb348c97df44 75 #endif
lypinator 0:bb348c97df44 76 /* SPI_2 and SPI_3. Source CLK is PCKL1 */
lypinator 0:bb348c97df44 77 spi_hz = HAL_RCC_GetPCLK1Freq();
lypinator 0:bb348c97df44 78 break;
lypinator 0:bb348c97df44 79 default:
lypinator 0:bb348c97df44 80 error("CLK: SPI instance not set");
lypinator 0:bb348c97df44 81 break;
lypinator 0:bb348c97df44 82 }
lypinator 0:bb348c97df44 83 return spi_hz;
lypinator 0:bb348c97df44 84 }
lypinator 0:bb348c97df44 85
lypinator 0:bb348c97df44 86 #endif