MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_STM/TARGET_STM32F4/spi_api.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 *******************************************************************************
sahilmgandhi 18:6a4db94011d3 3 * Copyright (c) 2015, STMicroelectronics
sahilmgandhi 18:6a4db94011d3 4 * All rights reserved.
sahilmgandhi 18:6a4db94011d3 5 *
sahilmgandhi 18:6a4db94011d3 6 * Redistribution and use in source and binary forms, with or without
sahilmgandhi 18:6a4db94011d3 7 * modification, are permitted provided that the following conditions are met:
sahilmgandhi 18:6a4db94011d3 8 *
sahilmgandhi 18:6a4db94011d3 9 * 1. Redistributions of source code must retain the above copyright notice,
sahilmgandhi 18:6a4db94011d3 10 * this list of conditions and the following disclaimer.
sahilmgandhi 18:6a4db94011d3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
sahilmgandhi 18:6a4db94011d3 12 * this list of conditions and the following disclaimer in the documentation
sahilmgandhi 18:6a4db94011d3 13 * and/or other materials provided with the distribution.
sahilmgandhi 18:6a4db94011d3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
sahilmgandhi 18:6a4db94011d3 15 * may be used to endorse or promote products derived from this software
sahilmgandhi 18:6a4db94011d3 16 * without specific prior written permission.
sahilmgandhi 18:6a4db94011d3 17 *
sahilmgandhi 18:6a4db94011d3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
sahilmgandhi 18:6a4db94011d3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sahilmgandhi 18:6a4db94011d3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
sahilmgandhi 18:6a4db94011d3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
sahilmgandhi 18:6a4db94011d3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sahilmgandhi 18:6a4db94011d3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sahilmgandhi 18:6a4db94011d3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
sahilmgandhi 18:6a4db94011d3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
sahilmgandhi 18:6a4db94011d3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
sahilmgandhi 18:6a4db94011d3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sahilmgandhi 18:6a4db94011d3 28 *******************************************************************************
sahilmgandhi 18:6a4db94011d3 29 */
sahilmgandhi 18:6a4db94011d3 30 #include "mbed_assert.h"
sahilmgandhi 18:6a4db94011d3 31 #include "mbed_error.h"
sahilmgandhi 18:6a4db94011d3 32 #include "spi_api.h"
sahilmgandhi 18:6a4db94011d3 33
sahilmgandhi 18:6a4db94011d3 34 #if DEVICE_SPI
sahilmgandhi 18:6a4db94011d3 35 #include <stdbool.h>
sahilmgandhi 18:6a4db94011d3 36 #include <math.h>
sahilmgandhi 18:6a4db94011d3 37 #include <string.h>
sahilmgandhi 18:6a4db94011d3 38 #include "cmsis.h"
sahilmgandhi 18:6a4db94011d3 39 #include "pinmap.h"
sahilmgandhi 18:6a4db94011d3 40 #include "PeripheralPins.h"
sahilmgandhi 18:6a4db94011d3 41
sahilmgandhi 18:6a4db94011d3 42 #if DEVICE_SPI_ASYNCH
sahilmgandhi 18:6a4db94011d3 43 #define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
sahilmgandhi 18:6a4db94011d3 44 #else
sahilmgandhi 18:6a4db94011d3 45 #define SPI_S(obj) (( struct spi_s *)(obj))
sahilmgandhi 18:6a4db94011d3 46 #endif
sahilmgandhi 18:6a4db94011d3 47
sahilmgandhi 18:6a4db94011d3 48 /*
sahilmgandhi 18:6a4db94011d3 49 * Only the frequency is managed in the family specific part
sahilmgandhi 18:6a4db94011d3 50 * the rest of SPI management is common to all STM32 families
sahilmgandhi 18:6a4db94011d3 51 */
sahilmgandhi 18:6a4db94011d3 52 int spi_get_clock_freq(spi_t *obj) {
sahilmgandhi 18:6a4db94011d3 53 struct spi_s *spiobj = SPI_S(obj);
sahilmgandhi 18:6a4db94011d3 54 int spi_hz = 0;
sahilmgandhi 18:6a4db94011d3 55
sahilmgandhi 18:6a4db94011d3 56 /* Get source clock depending on SPI instance */
sahilmgandhi 18:6a4db94011d3 57 switch ((int)spiobj->spi) {
sahilmgandhi 18:6a4db94011d3 58 case SPI_1:
sahilmgandhi 18:6a4db94011d3 59 #if defined SPI4_BASE
sahilmgandhi 18:6a4db94011d3 60 case SPI_4:
sahilmgandhi 18:6a4db94011d3 61 #endif
sahilmgandhi 18:6a4db94011d3 62 #if defined SPI5_BASE
sahilmgandhi 18:6a4db94011d3 63 case SPI_5:
sahilmgandhi 18:6a4db94011d3 64 #endif
sahilmgandhi 18:6a4db94011d3 65 #if defined SPI6_BASE
sahilmgandhi 18:6a4db94011d3 66 case SPI_6:
sahilmgandhi 18:6a4db94011d3 67 #endif
sahilmgandhi 18:6a4db94011d3 68 /* SPI_1, SPI_4, SPI_5 and SPI_6. Source CLK is PCKL2 */
sahilmgandhi 18:6a4db94011d3 69 spi_hz = HAL_RCC_GetPCLK2Freq();
sahilmgandhi 18:6a4db94011d3 70 break;
sahilmgandhi 18:6a4db94011d3 71 case SPI_2:
sahilmgandhi 18:6a4db94011d3 72 #if defined SPI3_BASE
sahilmgandhi 18:6a4db94011d3 73 case SPI_3:
sahilmgandhi 18:6a4db94011d3 74 #endif
sahilmgandhi 18:6a4db94011d3 75 /* SPI_2 and SPI_3. Source CLK is PCKL1 */
sahilmgandhi 18:6a4db94011d3 76 spi_hz = HAL_RCC_GetPCLK1Freq();
sahilmgandhi 18:6a4db94011d3 77 break;
sahilmgandhi 18:6a4db94011d3 78 default:
sahilmgandhi 18:6a4db94011d3 79 error("CLK: SPI instance not set");
sahilmgandhi 18:6a4db94011d3 80 break;
sahilmgandhi 18:6a4db94011d3 81 }
sahilmgandhi 18:6a4db94011d3 82 return spi_hz;
sahilmgandhi 18:6a4db94011d3 83 }
sahilmgandhi 18:6a4db94011d3 84
sahilmgandhi 18:6a4db94011d3 85 #endif