Mouse code for the MacroRat
Diff: mbed-dev/targets/TARGET_STM/TARGET_STM32F1/spi_api.c
- Revision:
- 18:6a4db94011d3
diff -r f713758f6238 -r 6a4db94011d3 mbed-dev/targets/TARGET_STM/TARGET_STM32F1/spi_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_STM/TARGET_STM32F1/spi_api.c Sun May 14 23:18:57 2017 +0000 @@ -0,0 +1,70 @@ +/* mbed Microcontroller Library + ******************************************************************************* + * Copyright (c) 2014, STMicroelectronics + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + ******************************************************************************* + */ +#include "mbed_assert.h" +#include "mbed_error.h" +#include "spi_api.h" + +#if DEVICE_SPI +#include "cmsis.h" +#include "pinmap.h" +#include "PeripheralPins.h" + +#if DEVICE_SPI_ASYNCH + #define SPI_S(obj) (( struct spi_s *)(&(obj->spi))) +#else + #define SPI_S(obj) (( struct spi_s *)(obj)) +#endif + +/* + * Only the frequency is managed in the family specific part + * the rest of SPI management is common to all STM32 families + */ +int spi_get_clock_freq(spi_t *obj) { + struct spi_s *spiobj = SPI_S(obj); + int spi_hz = 0; + + /* Get source clock depending on SPI instance */ + switch ((int)spiobj->spi) { + case SPI_1: + /* SPI_1. Source CLK is PCKL2 */ + spi_hz = HAL_RCC_GetPCLK2Freq(); + break; + case SPI_2: + /* SPI_2. Source CLK is PCKL1 */ + spi_hz = HAL_RCC_GetPCLK1Freq(); + break; + default: + error("CLK: SPI instance not set"); + break; + } + return spi_hz; +} + +#endif