Initial commit
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?
User | Revision | Line number | New 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 |