Mouse code for the MacroRat
mbed-dev/targets/TARGET_STM/TARGET_STM32F1/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?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /* mbed Microcontroller Library |
sahilmgandhi | 18:6a4db94011d3 | 2 | ******************************************************************************* |
sahilmgandhi | 18:6a4db94011d3 | 3 | * Copyright (c) 2014, 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 "cmsis.h" |
sahilmgandhi | 18:6a4db94011d3 | 36 | #include "pinmap.h" |
sahilmgandhi | 18:6a4db94011d3 | 37 | #include "PeripheralPins.h" |
sahilmgandhi | 18:6a4db94011d3 | 38 | |
sahilmgandhi | 18:6a4db94011d3 | 39 | #if DEVICE_SPI_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 40 | #define SPI_S(obj) (( struct spi_s *)(&(obj->spi))) |
sahilmgandhi | 18:6a4db94011d3 | 41 | #else |
sahilmgandhi | 18:6a4db94011d3 | 42 | #define SPI_S(obj) (( struct spi_s *)(obj)) |
sahilmgandhi | 18:6a4db94011d3 | 43 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 44 | |
sahilmgandhi | 18:6a4db94011d3 | 45 | /* |
sahilmgandhi | 18:6a4db94011d3 | 46 | * Only the frequency is managed in the family specific part |
sahilmgandhi | 18:6a4db94011d3 | 47 | * the rest of SPI management is common to all STM32 families |
sahilmgandhi | 18:6a4db94011d3 | 48 | */ |
sahilmgandhi | 18:6a4db94011d3 | 49 | int spi_get_clock_freq(spi_t *obj) { |
sahilmgandhi | 18:6a4db94011d3 | 50 | struct spi_s *spiobj = SPI_S(obj); |
sahilmgandhi | 18:6a4db94011d3 | 51 | int spi_hz = 0; |
sahilmgandhi | 18:6a4db94011d3 | 52 | |
sahilmgandhi | 18:6a4db94011d3 | 53 | /* Get source clock depending on SPI instance */ |
sahilmgandhi | 18:6a4db94011d3 | 54 | switch ((int)spiobj->spi) { |
sahilmgandhi | 18:6a4db94011d3 | 55 | case SPI_1: |
sahilmgandhi | 18:6a4db94011d3 | 56 | /* SPI_1. Source CLK is PCKL2 */ |
sahilmgandhi | 18:6a4db94011d3 | 57 | spi_hz = HAL_RCC_GetPCLK2Freq(); |
sahilmgandhi | 18:6a4db94011d3 | 58 | break; |
sahilmgandhi | 18:6a4db94011d3 | 59 | case SPI_2: |
sahilmgandhi | 18:6a4db94011d3 | 60 | /* SPI_2. Source CLK is PCKL1 */ |
sahilmgandhi | 18:6a4db94011d3 | 61 | spi_hz = HAL_RCC_GetPCLK1Freq(); |
sahilmgandhi | 18:6a4db94011d3 | 62 | break; |
sahilmgandhi | 18:6a4db94011d3 | 63 | default: |
sahilmgandhi | 18:6a4db94011d3 | 64 | error("CLK: SPI instance not set"); |
sahilmgandhi | 18:6a4db94011d3 | 65 | break; |
sahilmgandhi | 18:6a4db94011d3 | 66 | } |
sahilmgandhi | 18:6a4db94011d3 | 67 | return spi_hz; |
sahilmgandhi | 18:6a4db94011d3 | 68 | } |
sahilmgandhi | 18:6a4db94011d3 | 69 | |
sahilmgandhi | 18:6a4db94011d3 | 70 | #endif |