mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_STM/TARGET_STM32F3/spi_api.c@187:0387e8f68319, 2018-09-06 (annotated)

Committer:
AnnaBridge
Date:
Thu Sep 06 13:40:20 2018 +0100
Revision:
187:0387e8f68319
Parent:
158:b23ee177fd68 
mbed-dev library. Release version 163

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 *******************************************************************************
<> 149:156823d33999 3 * Copyright (c) 2014, STMicroelectronics
<> 149:156823d33999 4 * All rights reserved.
<> 149:156823d33999 5 *
<> 149:156823d33999 6 * Redistribution and use in source and binary forms, with or without
<> 149:156823d33999 7 * modification, are permitted provided that the following conditions are met:
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 149:156823d33999 10 * this list of conditions and the following disclaimer.
<> 149:156823d33999 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 149:156823d33999 12 * this list of conditions and the following disclaimer in the documentation
<> 149:156823d33999 13 * and/or other materials provided with the distribution.
<> 149:156823d33999 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 149:156823d33999 15 * may be used to endorse or promote products derived from this software
<> 149:156823d33999 16 * without specific prior written permission.
<> 149:156823d33999 17 *
<> 149:156823d33999 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 149:156823d33999 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 149:156823d33999 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 149:156823d33999 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 149:156823d33999 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 149:156823d33999 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 149:156823d33999 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 149:156823d33999 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 149:156823d33999 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 149:156823d33999 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 149:156823d33999 28 *******************************************************************************
<> 149:156823d33999 29 */
<> 149:156823d33999 30 #include "mbed_assert.h"
<> 149:156823d33999 31 #include "mbed_error.h"
<> 149:156823d33999 32 #include "spi_api.h"
<> 149:156823d33999 33
<> 149:156823d33999 34 #if DEVICE_SPI
<> 149:156823d33999 35
<> 149:156823d33999 36 #include "cmsis.h"
<> 149:156823d33999 37 #include "pinmap.h"
<> 149:156823d33999 38 #include "PeripheralPins.h"
<> 149:156823d33999 39
<> 149:156823d33999 40
<> 149:156823d33999 41 #if DEVICE_SPI_ASYNCH
AnnaBridge 187:0387e8f68319 42 #define SPI_S(obj) (( struct spi_s *)(&(obj->spi)))
<> 149:156823d33999 43 #else
AnnaBridge 187:0387e8f68319 44 #define SPI_S(obj) (( struct spi_s *)(obj))
<> 149:156823d33999 45 #endif
<> 149:156823d33999 46
<> 149:156823d33999 47 /*
<> 149:156823d33999 48 * Only the frequency is managed in the family specific part
<> 149:156823d33999 49 * the rest of SPI management is common to all STM32 families
<> 149:156823d33999 50 */
AnnaBridge 187:0387e8f68319 51 int spi_get_clock_freq(spi_t *obj)
AnnaBridge 187:0387e8f68319 52 {
<> 149:156823d33999 53 struct spi_s *spiobj = SPI_S(obj);
AnnaBridge 187:0387e8f68319 54 int spi_hz = 0;
<> 149:156823d33999 55
AnnaBridge 187:0387e8f68319 56 /* Get source clock depending on SPI instance */
<> 149:156823d33999 57 switch ((int)spiobj->spi) {
<> 149:156823d33999 58 #if defined SPI1_BASE
Kojto 158:b23ee177fd68 59 case SPI_1:
Kojto 158:b23ee177fd68 60 /* SPI_1. Source CLK is PCKL2 */
Kojto 158:b23ee177fd68 61 spi_hz = HAL_RCC_GetPCLK2Freq();
Kojto 158:b23ee177fd68 62 break;
<> 149:156823d33999 63 #endif
<> 149:156823d33999 64 #if defined SPI2_BASE
Kojto 158:b23ee177fd68 65 case SPI_2:
Kojto 158:b23ee177fd68 66 /* SPI_2 and SPI_3. Source CLK is PCKL1 */
Kojto 158:b23ee177fd68 67 spi_hz = HAL_RCC_GetPCLK1Freq();
Kojto 158:b23ee177fd68 68 break;
<> 149:156823d33999 69 #endif
<> 149:156823d33999 70 #if defined SPI3_BASE
Kojto 158:b23ee177fd68 71 case SPI_3:
Kojto 158:b23ee177fd68 72 /* SPI_2 and SPI_3. Source CLK is PCKL1 */
Kojto 158:b23ee177fd68 73 spi_hz = HAL_RCC_GetPCLK1Freq();
Kojto 158:b23ee177fd68 74 break;
<> 149:156823d33999 75 #endif
<> 149:156823d33999 76 #if defined SPI4_BASE
Kojto 158:b23ee177fd68 77 case SPI_4:
Kojto 158:b23ee177fd68 78 /* SPI_4. Source CLK is PCKL2 */
Kojto 158:b23ee177fd68 79 spi_hz = HAL_RCC_GetPCLK2Freq();
Kojto 158:b23ee177fd68 80 break;
<> 149:156823d33999 81 #endif
Kojto 158:b23ee177fd68 82 default:
Kojto 158:b23ee177fd68 83 error("CLK: SPI instance not set");
<> 149:156823d33999 84 break;
<> 149:156823d33999 85 }
<> 149:156823d33999 86 return spi_hz;
<> 149:156823d33999 87 }
<> 149:156823d33999 88
<> 149:156823d33999 89 #endif